Website ruby deps do not bundle on macOS

$ cd site/
$ bundle install
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Using coffee-script-source 1.6.3
Using multi_json 1.8.2
Using chunky_png 1.2.9
Using fssm 0.2.10
Using sass 3.2.12
Using tilt 1.3.7
Using kramdown 1.2.0
Using i18n 0.6.5
Using rb-fsevent 0.9.3
Using ffi 1.9.3
Using rack 1.5.2
Using thor 0.18.1
Using bundler 1.15.1
Using hike 1.2.3
Fetching eventmachine 1.0.3
Installing eventmachine 1.0.3 with native extensions
Using http_parser.rb 0.5.3
Using addressable 2.3.5
Using atomic 1.1.14
Using rdiscount 2.1.7
Using htmlentities 4.3.2
Fetching libv8 3.16.14.15
Installing libv8 3.16.14.15 with native extensions
Using ref 2.0.0
Using execjs 1.4.0
Using compass 0.12.2
Using haml 4.0.4
Using activesupport 3.2.15
Using rb-inotify 0.9.2
Using rb-kqueue 0.2.0
Using rack-test 0.6.2
Using rack-livereload 0.3.15
Using rouge 0.3.10
Using sprockets 2.10.0
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/bbannier/src/mesos/site/vendor/ruby/2.4.0/gems/eventmachine-1.0.3/ext
/Users/bbannier/src/homebrew/opt/ruby/bin/ruby -r ./siteconf20170705-46478-cy91ue.rb extconf.rb
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... no
checking for inotify_init() in sys/inotify.h... no
checking for __NR_inotify_init in sys/syscall.h... no
checking for writev() in sys/uio.h... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for sys/event.h... yes
checking for sys/queue.h... yes
creating Makefile

current directory: /Users/bbannier/src/mesos/site/vendor/ruby/2.4.0/gems/eventmachine-1.0.3/ext
make "DESTDIR=" clean

current directory: /Users/bbannier/src/mesos/site/vendor/ruby/2.4.0/gems/eventmachine-1.0.3/ext
make "DESTDIR="
compiling binder.cpp
compiling cmain.cpp
compiling ed.cpp
compiling em.cpp
compiling kb.cpp
compiling page.cpp
compiling pipe.cpp
compiling rubymain.cpp
compiling ssl.cpp
In file included from pipe.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from page.cpp:21:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from kb.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from em.cpp:23:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from binder.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from rubymain.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from ed.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from cmain.cpp:20:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from ssl.cpp:23:
In file included from ./project.h:149:
./binder.h:35:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long GetBinding() {return Binding;}
                ^~~~~~
In file included from pipe.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:85:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from binder.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:In file included from kb.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
85:3:                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
 warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);./em.h:
85:                ^~~~~~
./em.h:86:3: 3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
In file included from                 const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:88em.cpp:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
:23:
In file included from ./project.h                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
:150:
./em.h:84:3: warning: ./em.h                const unsigned long ConnectToUnixServer (const char *);'const' type qualifier on return type has no effect [-Wignored-qualifiers]

                ^~~~~~
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:./em.h:85:3::88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
89: 3:warning:                 const unsigned long CreateTcpServer (const char *, int);'const' type qualifier on return type has no effect [-Wignored-qualifiers] warning: 
                ^~~~~~
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]

                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:./em.h:93                const unsigned long OpenDatagramSocket (const char *, int);
:                ^~~~~~
3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:99:3                const unsigned long CreateUnixDomainServer (const char*);86: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]

                ^~~~~~
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:116:3:: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h3:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]                const unsigned long Socketpair (char* const*);
                ^~~~~~

./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~                const unsigned long WatchPid (int);
                ^~~~~~

./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:88:3:                const unsigned long AttachFD (int, bool);
                ^~~~~~
 warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: ./em.h:warning116:3: : warning'const' type qualifier on return type has no effect [-Wignored-qualifiers]
: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);                const unsigned long OpenKeyboard();
                ^~~~~~

                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from rubymain.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
In file included from page.cpp:21:
In file included from ./project.h:150                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:85:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:85                const unsigned long ConnectToServer (const char *, int, const char *, int);:
3                ^~~~~~
: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]

                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:90:3: warning: ./em.h:91:3'const' type qualifier on return type has no effect [-Wignored-qualifiers]
: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);                const unsigned long OpenKeyboard();

                ^~~~~~                ^~~~~~

./em.h:91:./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:99                const unsigned long Socketpair (char* const*);:
3                ^~~~~~:
 warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
                const unsigned long WatchPid (int);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from cmain.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:85:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from ed.cpp:20:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:85:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from ssl.cpp:23:
In file included from ./project.h:150:
./em.h:84:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long InstallOneshotTimer (int);
                ^~~~~~
./em.h:85:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToServer (const char *, int, const char *, int);
                ^~~~~~
./em.h:86:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long ConnectToUnixServer (const char *);
                ^~~~~~
./em.h:88:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateTcpServer (const char *, int);
                ^~~~~~
./em.h:89:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenDatagramSocket (const char *, int);
                ^~~~~~
./em.h:90:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long CreateUnixDomainServer (const char*);
                ^~~~~~
./em.h:91:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long OpenKeyboard();
                ^~~~~~
./em.h:93:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long Socketpair (char* const*);
                ^~~~~~
./em.h:99:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long AttachFD (int, bool);
                ^~~~~~
./em.h:116:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchFile (const char*);
                ^~~~~~
./em.h:125:3: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
                const unsigned long WatchPid (int);
                ^~~~~~
In file included from pipe.cpp:20:
In file included from ./project.h:154:
./eventmachine.h:46:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
In file included from binder.cpp:20:
In file included from ./project.h:154:
./eventmachine.h:46:2: warningIn file included from em.cpp: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
:23:
In file included from ./project.h        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
:154:
./eventmachine.h:46:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:47:2:         const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~warning: 
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:./eventmachine.h:50:22: warning: warning: : 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~

        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: ./eventmachine.h:66warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: ./eventmachine.h:'const' type qualifier on return type has no effect [-Wignored-qualifiers]67
:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h./eventmachine.h::6868::22::  warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:105:2        const unsigned long evma_popen (char * const*cmd_strings);:
         ^~~~~~warning
: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:108:2: warning:         const unsigned long evma_watch_filename (const char *fname);
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        ^~~~~~
        const unsigned long evma_watch_pid (int);
        ^~~~~~
In file included from page.cpp:21:
In file included from ./project.h:154:
./eventmachine.h:46:2./eventmachine.h:108: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
:2:         const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
In file included from kb.cppIn file included from rubymain.cpp:20:
:In file included from 20:
In file included from ./project.h:154./project.h:154:
./eventmachine.h:46:2:
./eventmachine.h: warning: :46'const' type qualifier on return type has no effect [-Wignored-qualifiers]:2
: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
./eventmachine.h:47:2:./eventmachine.h:47 :2: warning: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]'const' type qualifier on return type has no effect
[-Wignored-qualifiers]

        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:103:2: warning: ./eventmachine.h:'const' type qualifier on return type has no effect [-Wignored-qualifiers]
48:2./eventmachine.h:48:: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
2        ^~~~~~
: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:50:2:./eventmachine.h:50:2:  warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);:
108        ^~~~~~:
2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
./eventmachine.h:65:2: ./eventmachine.h:65:2: warning: warning'const' type qualifier on return type has no effect [-Wignored-qualifiers]
: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:./eventmachine.h2: warning: :'const' type qualifier on return type has no effect [-Wignored-qualifiers]
66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h./eventmachine.h::105105::2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
        const unsigned long evma_watch_pid (int);
        ^~~~~~
page.cpp:55:15: warning: implicit conversion loses integer precision: 'size_t' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
                *length = p.Size;
                        ~ ~~^~~~
In file included from cmain.cpp:20:
In file included from ./project.h:154:
./eventmachine.h:46:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
cmain.cpp:96:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_install_oneshot_timer (int seconds)
           ^~~~~~
cmain.cpp:107:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port)
           ^~~~~~
cmain.cpp:117:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_connect_to_unix_server (const char *server)
           ^~~~~~
In file included from ed.cpp:20:
In file included from ./project.h:154:
cmain.cpp:127:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]./eventmachine.h
:46:2: extern "C" const unsigned long evma_attach_fd (int file_descriptor, int watch_mode)
           ^~~~~~
warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
rubymain.cpp:803:13: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
                int len = RARRAY_LEN(cmd);
                    ~~~   ^~~~~~~~~~~~~~~
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/ruby.h:1026:23:        const unsigned long evma_watch_pid (int);
        ^~~~~~
 note: expanded from macro 'RARRAY_LEN'
#define RARRAY_LEN(a) rb_array_len(a)
                      ^~~~~~~~~~~~~~~
rubymain.cpp:1020:42: warning: implicit conversion loses integer precision: 'VALUE' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
        return INT2NUM (evma_set_rlimit_nofile (arg));
                        ~~~~~~~~~~~~~~~~~~~~~~  ^~~
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/ruby.h:1538:31: note: expanded from macro 'INT2NUM'
#define INT2NUM(x) RB_INT2NUM(x)
                              ^
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/ruby.h:1515:41: note: expanded from macro 'RB_INT2NUM'
# define RB_INT2NUM(v) RB_INT2FIX((int)(v))
                                        ^
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/ruby.h:231:33: note: expanded from macro 'RB_INT2FIX'
#define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
                                ^
em.cpp:75:2:pipe.cpp:160:11: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
                int r = read (sd, readbuffer, sizeof(readbuffer) - 1);
                    ~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pipe.cpp:217:36: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
                        int len = sizeof(output_buffer) - nbytes;
                            ~~~   ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
pipe.cpp:231:22: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
        int bytes_written = write (GetSocket(), output_buffer, nbytes);
            ~~~~~~~~~~~~~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pipe.cpp:236:21: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
                        int len = nbytes - bytes_written;
                            ~~~   ~~~~~~~^~~~~~~~~~~~~~~
 warning: field 'LoopBreakerWriter' will be initialized after field 'NumCloseScheduled' [-Wreorder]
        LoopBreakerWriter (-1),
        ^
In file included from ssl.cpp:23:
In file included from ./project.h:154:
./eventmachine.h:46:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_install_oneshot_timer (int seconds);
        ^~~~~~
./eventmachine.h:47:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
em.cpp:265:14: warning: implicit conversion loses integer precision: 'rlim_t' (aka 'unsigned long long') to 'int' [-Wshorten-64-to-32]
        const unsigned long evma_connect_to_server (const char *bind_addr, int bind_port, const char *server, int port);
        ^~~~~~
        return rlim.rlim_cur;
        ~~~~~~ ~~~~~^~~~~~~~
./eventmachine.h:48:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_connect_to_unix_server (const char *server);
        ^~~~~~
./eventmachine.h:50:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_attach_fd (int file_descriptor, int watch_mode);
        ^~~~~~
./eventmachine.h:65:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_tcp_server (const char *address, int port);
        ^~~~~~
./eventmachine.h:66:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_create_unix_domain_server (const char *filename);
        ^~~~~~
./eventmachine.h:67:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_datagram_socket (const char *server, int port);
        ^~~~~~
./eventmachine.h:68:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_open_keyboard();
        ^~~~~~
./eventmachine.h:103:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_popen (char * const*cmd_strings);
        ^~~~~~
./eventmachine.h:105:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_filename (const char *fname);
        ^~~~~~
./eventmachine.h:108:2: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
        const unsigned long evma_watch_pid (int);
        ^~~~~~
ed.cpp:297:39: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
                        ProxyTarget->SendOutboundData(buf, proxied);
                                     ~~~~~~~~~~~~~~~~      ^~~~~~~
ed.cpp:303:17: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare]
                                if (proxied < size) {
                                    ~~~~~~~ ^ ~~~~
em.cpp:736:29: warning: cmain.cpp:269:12: warning: implicit conversion loses integer precision: 'std::__1::vector<EventableDescriptor *, std::__1::allocator<EventableDescriptor *> >::size_type' (aka
'unsigned long') to 'int' [-Wshorten-64-to-32]
        int nSockets = Descriptors.size();
            ~~~~~~~~   ~~~~~~~~~~~~^~~~~~
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_create_tcp_server (const char *address, int port)
           ^~~~~~
cmain.cpp:279:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_create_unix_domain_server (const char *filename)
           ^~~~~~
cmain.cpp:289:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_open_datagram_socket (const char *address, int port)
           ^~~~~~
cmain.cpp:299:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_open_keyboard()
           ^~~~~~
cmain.cpp:309:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_watch_filename (const char *fname)
           ^~~~~~
cmain.cpp:329:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_watch_pid (int pid)
           ^~~~~~
em.cpp:827:9: error: use of undeclared identifier 'rb_thread_select'; did you mean 'rb_thread_fd_select'?
        return EmSelect (maxsocket+1, &fdreads, &fdwrites, &fderrors, &tv);
               ^~~~~~~~
               rb_thread_fd_select
./em.h:25:20: note: expanded from macro 'EmSelect'
  #define EmSelect rb_thread_select
                   ^
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/intern.h:456:5: note: 'rb_thread_fd_select' declared here
int rb_thread_fd_select(int, rb_fdset_t *, rb_fdset_t *, rb_fdset_t *, struct timeval *);
    ^
em.cpp:827:32: error: cannot initialize a parameter of type 'rb_fdset_t *' with an rvalue of type 'fd_set *'
        return EmSelect (maxsocket+1, &fdreads, &fdwrites, &fderrors, &tv);
                                      ^~~~~~~~
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/intern.h:456:42: note: passing argument to parameter here
int rb_thread_fd_select(int, rb_fdset_t *, rb_fdset_t *, rb_fdset_t *, struct timeval *);
                                         ^
ed.cpp:767:11: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
                int r = read (sd, readbuffer, sizeof(readbuffer) - 1);
                    ~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cmain.cpp:678:12: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
extern "C" const unsigned long evma_popen (char * const*cmd_strings)
           ^~~~~~
cmain.cpp:778:6: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
        r = read (Fd, data, filesize);
          ~ ^~~~~~~~~~~~~~~~~~~~~~~~~
ed.cpp:980:29: warning: implicit conversion loses integer precision: 'std::__1::deque<ConnectionDescriptor::OutboundPage, std::__1::allocator<ConnectionDescriptor::OutboundPage> >::size_type' (aka
'unsigned long') to 'int' [-Wshorten-64-to-32]
        int iovcnt = OutboundPages.size();
            ~~~~~~   ~~~~~~~~~~~~~~^~~~~~
ed.cpp:1029:22: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
        int bytes_written = writev (GetSocket(), iov, iovcnt);
            ~~~~~~~~~~~~~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
em.cpp:946:6: error: use of undeclared identifier 'rb_thread_select'; did you mean 'rb_thread_fd_select'?
                                        EmSelect (0, NULL, NULL, NULL, &tv);
                                        ^~~~~~~~
                                        rb_thread_fd_select
./em.h:25:20: note: expanded from macro 'EmSelect'
  #define EmSelect rb_thread_select
                   ^
/Users/bbannier/src/homebrew/Cellar/ruby/2.4.1_1/include/ruby-2.4.0/ruby/intern.h:456:5: note: 'rb_thread_fd_select' declared here
int rb_thread_fd_select(int, rb_fdset_t *, rb_fdset_t *, rb_fdset_t *, struct timeval *);
    ^
em.cpp:1027:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::InstallOneshotTimer (int milliseconds)
^~~~~~
em.cpp:1049:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::ConnectToServer (const char *bind_addr, int bind_port, const char *server, int port)
^~~~~~
em.cpp:1235:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::ConnectToUnixServer (const char *server)
^~~~~~
em.cpp:1308:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::AttachFD (int fd, bool watch_mode)
^~~~~~
23 warnings generated.
em.cpp:1480:1: warning: ed.cpp:1595:11: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
                int r = recvfrom (sd, readbuffer, sizeof(readbuffer) - 1, 0, (struct sockaddr*)&sin, &slen);
                    ~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::CreateTcpServer (const char *server, int port)
^~~~~~
em.cpp:1563:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::OpenDatagramSocket (const char *address, int port)
^~~~~~
ed.cpp:1665:11: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
                int s = sendto (sd, (char*)op->Buffer, op->Length, 0, (struct sockaddr*)&(op->From), sizeof(op->From));
                    ~   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
em.cpp:1826:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::CreateUnixDomainServer (const char *filename)
^~~~~~
ed.cpp:1782:24: warning: implicit conversion loses integer precision: 'unsigned long' to 'in_addr_t' (aka 'unsigned int') [-Wshorten-64-to-32]
        pin.sin_addr.s_addr = HostAddr;
                            ~ ^~~~~~~~
em.cpp:1952:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::Socketpair (char * const*cmd_strings)
^~~~~~
em.cpp:2016:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::OpenKeyboard()
^~~~~~
em.cpp:2032:28: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32]
        return Descriptors.size() + NewDescriptors.size();
        ~~~~~~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
em.cpp:2040:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::WatchPid (int pid)
^~~~~~
em.cpp:2112:1: warning: 'const' type qualifier on return type has no effect [-Wignored-qualifiers]
const unsigned long EventMachine_t::WatchFile (const char *fpath)
^~~~~~
In file included from em.cpp:23:
In file included from ./project.h:150:
./em.h:189:12: warning: private field 'NextHeartbeatTime' is not used [-Wunused-private-field]
                uint64_t NextHeartbeatTime;
                         ^
./em.h:221:22: warning: private field 'inotify' is not used [-Wunused-private-field]
                InotifyDescriptor *inotify; // pollable descriptor for our inotify instance
                                   ^
40 warnings and 3 errors generated.
make: *** [em.o] Error 1
make: *** Waiting for unfinished jobs....
23 warnings generated.
35 warnings generated.
23 warnings generated.
24 warnings generated.
25 warnings generated.
27 warnings generated.
31 warnings generated.

make failed, exit code 2

Gem files will remain installed in /Users/bbannier/src/mesos/site/vendor/ruby/2.4.0/gems/eventmachine-1.0.3 for inspection.
Results logged to /Users/bbannier/src/mesos/site/vendor/ruby/2.4.0/extensions/x86_64-darwin-16/2.4.0/eventmachine-1.0.3/gem_make.out

An error occurred while installing eventmachine (1.0.3), and Bundler cannot continue.
Make sure that `gem install eventmachine -v '1.0.3'` succeeds before bundling.

In Gemfile:
  middleman-livereload was resolved to 3.1.0, which depends on
    em-websocket was resolved to 0.5.0, which depends on
      eventmachine