Specify c++11 in node-gyp settings

[dblarons]

OS: macOS Sierra

I already have Xcode and Xcode developer tools installed.

As per the README, I installed ghostscript with brew and set the GS4JS_HOME environment variable.

When I yarn install --force, I get the following error:

error /Users/aaronsmith/Documents/XXXX/XXXX/node_modules/ghostscript4js: Command failed.
Exit code: 1
Command: sh
Arguments: -c node-gyp rebuild
Directory: /Users/aaronsmith/Documents/XXXX/XXXX/node_modules/ghostscript4js
Output:
gyp info it worked if it ends with ok
gyp info using node-gyp@3.4.0
gyp info using node@6.11.0 | darwin | x64
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp info spawn /usr/local/bin/python2
gyp info spawn args [ '/Users/aaronsmith/.nvm/versions/node/v6.11.0/lib/node_modules/npm/node_modules/node-gyp/gyp/gyp_main.py',
gyp info spawn args   'binding.gyp',
gyp info spawn args   '-f',
gyp info spawn args   'make',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/aaronsmith/Documents/XXXX/XXXX/node_modules/ghostscript4js/build/config.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/aaronsmith/.nvm/versions/node/v6.11.0/lib/node_modules/npm/node_modules/node-gyp/addon.gypi',
gyp info spawn args   '-I',
gyp info spawn args   '/Users/aaronsmith/.node-gyp/6.11.0/include/node/common.gypi',
gyp info spawn args   '-Dlibrary=shared_library',
gyp info spawn args   '-Dvisibility=default',
gyp info spawn args   '-Dnode_root_dir=/Users/aaronsmith/.node-gyp/6.11.0',
gyp info spawn args   '-Dnode_gyp_dir=/Users/aaronsmith/.nvm/versions/node/v6.11.0/lib/node_modules/npm/node_modules/node-gyp',
gyp info spawn args   '-Dnode_lib_file=node.lib',
gyp info spawn args   '-Dmodule_root_dir=/Users/aaronsmith/Documents/XXXX/XXXX/node_modules/ghostscript4js',
gyp info spawn args   '--depth=.',
gyp info spawn args   '--no-parallel',
gyp info spawn args   '--generator-output',
gyp info spawn args   'build',
gyp info spawn args   '-Goutput_dir=.' ]
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp info spawn make
gyp info spawn args [ 'BUILDTYPE=Release', '-C', 'build' ]
  CXX(target) Release/obj.target/ghostscript4js/src/ghostscript4js.o
In file included from ../src/ghostscript4js.cc:20:
../src/ghostscript4js.h:34:10: fatal error: 'mutex' file not found
#include <mutex>
         ^
1 error generated.
make: *** [Release/obj.target/ghostscript4js/src/ghostscript4js.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/aaronsmith/.nvm/versions/node/v6.11.0/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack     at emitTwo (events.js:106:13)
gyp ERR! stack     at ChildProcess.emit (events.js:191:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:215:12)
gyp ERR! System Darwin 16.6.0
gyp ERR! command "/Users/aaronsmith/.nvm/versions/node/v6.11.0/bin/node" "/Users/aaronsmith/.nvm/versions/node/v6.11.0/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/aaronsmith/Documents/XXXX/XXXX/node_modules/ghostscript4js
gyp ERR! node -v v6.11.0
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok

It appears that the C++ 11 headers could not be found (mutex.h), so I specified them in the binding.gyp file.

uWebSockets had a related issue with node-gyp, and their solution was what worked for me. The comment is at the bottom (couldn't link to it directly). https://github.com/uNetworking/uWebSockets/issues/93

[NickNaso]

Hi @dblarons, thanks for your contributions!

[aatronics]

Got below error whiel running c++ code:

include <uWS/uWS.h>

int main() { uWS::Hub h;

h.onMessage([](uWS::WebSocket<uWS::SERVER> *ws, char *message, size_t length, uWS::OpCode opCode) {
    ws->send(message, length, opCode);
});

if (h.listen(3000)) {
    h.run();
}

}

$ g++ -std=c++11 -std=gnu++11 uw_ex2.cpp

ERROR:

/tmp/cc6sXr4A.o: In function uWS::Hub::Hub(int, bool, unsigned int)': uw_ex2.cpp:(.text._ZN3uWS3HubC2Eibj[_ZN3uWS3HubC5Eibj]+0x36): undefined reference to uS::Node::Node(int, int, i nt, bool)' uw_ex2.cpp:(.text._ZN3uWS3HubC2Eibj[_ZN3uWS3HubC5Eibj]+0x5a): undefined reference to uWS::Group<true>::Group(in t, unsigned int, uWS::Hub*, uS::NodeData*)' uw_ex2.cpp:(.text._ZN3uWS3HubC2Eibj[_ZN3uWS3HubC5Eibj]+0x86): undefined reference to uWS::Group::Group(i nt, unsigned int, uWS::Hub, uS::NodeData)' uw_ex2.cpp:(.text._ZN3uWS3HubC2Eibj[ZN3uWS3HubC5Eibj]+0xd6): undefined reference to `inflateInit2' uw_ex2.cpp:(.text._ZN3uWS3HubC2Eibj[_ZN3uWS3HubC5Eibj]+0x13d): undefined reference to uS::Node::~Node()' /tmp/cc6sXr4A.o: In function uWS::Hub::~Hub()': uw_ex2.cpp:(.text._ZN3uWS3HubD2Ev[_ZN3uWS3HubD5Ev]+0x1a): undefined reference to inflateEnd' uw_ex2.cpp:(.text._ZN3uWS3HubD2Ev[_ZN3uWS3HubD5Ev]+0x7d): undefined reference to uS::Node::~Node()' collect2: error: ld returned 1 exit status