node.js : threads-a-gogo compile error

node.js를 위한 thread, threads_a_gogo 컴파일시 오류 해결 방법


koui-MacBook-Pro:node-threads-a-gogo kojunghyun$ node-waf configure install

******** THREADS_A_GOGO ********
**** Executing the configuration

Checking for program gcc or cc           : /usr/bin/gcc 
Checking for program cpp                 : /usr/bin/cpp 
Checking for program ar                  : /usr/bin/ar 
Checking for program ranlib              : /usr/bin/ranlib 
Checking for program g++ or c++          : /usr/bin/g++ 
Checking for program ar                  : /usr/bin/ar 
Checking for program ranlib              : /usr/bin/ranlib 
Checking for g++                         : ok  

**** Checking for node_addon

Checking for node path                   : not found 
Checking for node prefix                 : ok /usr/local 

**** Compiling minify.c
gcc /Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/deps/minifier/src/minify.c -o /Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/deps/minifier/bin/minify

'configure' finished successfully (0.210s)
Waf: Entering directory `/Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/build'

*** Building the project

**** Minifying .js source files
cat /Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/src/createPool.js | /Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/deps/minifier/bin/minify kCreatePool_js > /Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/src/createPool.js.c
......
[1/2] cxx: src/threads_a_gogo.cc -> build/Release/src/threads_a_gogo_1.o
../src/threads_a_gogo.cc: In function ‘void* aThread(void*)’:
../src/threads_a_gogo.cc:202: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_send(ev_loop*, ev_async*)’
../src/threads_a_gogo.cc: In function ‘void eventLoop(typeThread*)’:
../src/threads_a_gogo.cc:281: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_send(ev_loop*, ev_async*)’
../src/threads_a_gogo.cc: In function ‘void destroyaThread(typeThread*)’:
../src/threads_a_gogo.cc:362: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_stop(ev_loop*, ev_async*)’
../src/threads_a_gogo.cc: In function ‘void Callback(ev_async*, int)’:
../src/threads_a_gogo.cc:423: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_send(ev_loop*, ev_async*)’
../src/threads_a_gogo.cc: In function ‘v8::Handle<v8::Value> threadEmit(const v8::Arguments&)’:
../src/threads_a_gogo.cc:646: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_send(ev_loop*, ev_async*)’
../src/threads_a_gogo.cc: In function ‘v8::Handle<v8::Value> Create(const v8::Arguments&)’:
../src/threads_a_gogo.cc:685: error: invalid conversion from ‘void (*)(ev_async*, int)’ to ‘void (*)(ev_loop*, ev_async*, int)’
../src/threads_a_gogo.cc:686: error: cannot convert ‘ev_async*’ to ‘ev_loop*’ for argument ‘1’ to ‘void ev_async_start(ev_loop*, ev_async*)’
Waf: Leaving directory `/Users/kojunghyun/kojh/MyDev_MBP/NodeJs_Dev/node-threads-a-gogo/build'
Build failed:  -> task failed (err #1): 
        {task: cxx threads_a_gogo.cc -> threads_a_gogo_1.o}
koui-MacBook-Pro:node-threads-a-gogo kojunghyun$ 

해결 : threads_a_gogo.cc 파일 제일 위쪽 부분에 다음을 선언한다.

#define NODE_WANT_INTERNALS 0

Why?

ev 소스는 잘 모르지만 왜 컴파일 오류가 나는지만 알아보자.
먼저 오류가 나는 함수의 정의는 다음과 같다.

void
ev_async_send (EV_P_ ev_async *w)
{
    w->sent = 1;
    evpipe_write (EV_A_ &async_pending);
}

그리고 다음처럼 정의되어 있다.

# define EV_P  struct ev_loop *loop
# define EV_P_ EV_P,         

즉, 위의 함수는 ev_async_send (struct ev_loop *loop, ev_async *w) 원형을 가진다.
그런데, node.h 의 하단부에 다음과 같은 전처리문이 존재한다.

#if !defined(NODE_WANT_INTERNALS) && !defined(_WIN32)
# include "ev-emul.h"
# include "eio-emul.h"
#endif

NODE_WANT_INTERNALS 가 정의 안되있는 경우, ev-emul.h, eio-emul.h 헤더를 포함하게 되고, ev-emul.h 에서는 기존 정의를 무시하게 만들고 있다 (뭔지?). 


#undef EV_P
#undef EV_P_
...
#define EV_P            void
#define EV_P_

NODE_WANT_INTERNALS 이게 어떤 용도인지 궁금... 아무튼 컴파일은 성공~