Tiny C 编译器:未定义的符号“main” main 是什么时候定义的?
我有一个 main 函数,但是当 tcc 将所有内容链接在一起时,它说它未定义。这是为什么呢?
我正在使用 python 构建脚本,参数作为列表传递:
['v:/exe/tcc/tcc.exe', '-odist/***.exe', '-Llib/', '-llua5.1', '-lsoil', '-lSDL', '-lopengl32', 'build/luainterface\\msL.o', 'build/luainterface\\vector.o', 'build/rendering\\renderutil.o', 'build/structures\\crtree.o', 'build/structures\\uniqueid.o', 'build/structures\\vector.o', 'build/world\\blocklib.o', 'build/world\\chunk.o', 'build/world\\world.o', 'build/main.o']
输出很简单:
tcc: undefined symbol 'main'
我的 main 函数在文件 main.c 中定义(并且没有标头),并带有几个静态函数。 主要功能:
int main(int argc, char *argv[])
{
SDL_Surface* screen = render_initialize(1024,768);
lua_State* L = luaL_newstate();
//lua_atpanic(L,&Lpanic);
msL_registerState(L);
msL_openAllLibs(L);
int fail = luaL_dofile(L,"lua/main.luac");
if(fail)
{
fprintf(stderr, "Lua error: %s\n", lua_tostring(L,-1));
doexit(1);
}
lua_getfield(L,LUA_GLOBALSINDEX,"draw");
if(!lua_isfunction(L,-1))
{
lua_pop(L,1);
fprintf(stderr, "No draw function defined in global scope\n");
doexit(1);
}
lua_setfield(L,LUA_REGISTRYINDEX,"msL_drawfunction");
while(1)
{
lua_getfield(L,LUA_REGISTRYINDEX,"msL_drawfunction");
assert(lua_isfunction(L,-1));
int err = lua_pcall(L,0,0,0);
if(err)
{
fprintf(stderr,"Lua error: ");
switch(err)
{
case LUA_ERRRUN:
fprintf(stderr,"%s",lua_tostring(L,-1));
break;
case LUA_ERRMEM:
fprintf(stderr,"out of memory");
break;
default:
fprintf(stderr,"unknown error");
}
fprintf(stderr,"\n");
doexit(1);
}
render_flipbuffers(screen);
}
doexit(0);
}
编辑:我通过 tcc 运行代码,仅进行预处理。显然,通过 SDL 中的一些宏,main 函数被重命名为 SDL_main。
I have a main function, but when tcc goes to link everything together, it says its undefined. Why is this?
I'm using a python build script, and arguments are passed as lists:
['v:/exe/tcc/tcc.exe', '-odist/***.exe', '-Llib/', '-llua5.1', '-lsoil', '-lSDL', '-lopengl32', 'build/luainterface\\msL.o', 'build/luainterface\\vector.o', 'build/rendering\\renderutil.o', 'build/structures\\crtree.o', 'build/structures\\uniqueid.o', 'build/structures\\vector.o', 'build/world\\blocklib.o', 'build/world\\chunk.o', 'build/world\\world.o', 'build/main.o']
The output is simply:
tcc: undefined symbol 'main'
My main function is defined in the file main.c (and doesn't have a header), with a couple of static functions.
Main function:
int main(int argc, char *argv[])
{
SDL_Surface* screen = render_initialize(1024,768);
lua_State* L = luaL_newstate();
//lua_atpanic(L,&Lpanic);
msL_registerState(L);
msL_openAllLibs(L);
int fail = luaL_dofile(L,"lua/main.luac");
if(fail)
{
fprintf(stderr, "Lua error: %s\n", lua_tostring(L,-1));
doexit(1);
}
lua_getfield(L,LUA_GLOBALSINDEX,"draw");
if(!lua_isfunction(L,-1))
{
lua_pop(L,1);
fprintf(stderr, "No draw function defined in global scope\n");
doexit(1);
}
lua_setfield(L,LUA_REGISTRYINDEX,"msL_drawfunction");
while(1)
{
lua_getfield(L,LUA_REGISTRYINDEX,"msL_drawfunction");
assert(lua_isfunction(L,-1));
int err = lua_pcall(L,0,0,0);
if(err)
{
fprintf(stderr,"Lua error: ");
switch(err)
{
case LUA_ERRRUN:
fprintf(stderr,"%s",lua_tostring(L,-1));
break;
case LUA_ERRMEM:
fprintf(stderr,"out of memory");
break;
default:
fprintf(stderr,"unknown error");
}
fprintf(stderr,"\n");
doexit(1);
}
render_flipbuffers(screen);
}
doexit(0);
}
EDIT: I ran the code through tcc with preprocessing only. Apparently the main function is being renamed to SDL_main, through some macro in SDL.
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将
-lSDLmain
添加到链接器标志。http://wiki.libsdl.org/moin.cgi/FAQWindows#I_get_.22Undefined_reference_to_.27WinMain.4016.27.22
尽管 tcc 中的情况可能略有不同。
Add
-lSDLmain
to linker flags.http://wiki.libsdl.org/moin.cgi/FAQWindows#I_get_.22Undefined_reference_to_.27WinMain.4016.27.22
Although things may be a little different in tcc.