链接LuaJIT-2.0.2的静态库报错,需要在./bundle/ngx_lua-0.9.2/config中加入-ldl参数

[cf2012]

程序版本: ngx_openresty-1.4.3.4
操作系统: Ubuntu 12.04.1 LTS
编译器版本: gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
Luajit版本: LuaJIT-2.0.2

编译时, 我想用静态库: libluajit-5.1.a
所以将 $LuaJIT_HOME/lib 下的_.so_全删了.

然后执行:
./configure --prefix=pwd --with-luajit=/opt/LuaJIT-2.0.2

报错:
./configure: error: ngx_http_lua_module requires the Lua or LuaJIT library and LUAJIT_LIB is defined as /opt/LuaJIT-2.0.2/lib and LUAJIT_INC (path for lua.h) /opt/LuaJIT-2.0.2/include/luajit-2.0, but we cannot find LuaJIT there.

在bundle/nginx-1.4.3/auto/feature的47行之后添加:
cat $NGX_AUTOTEST.c
echo "/bin/sh -c "$ngx_test" >> $NGX_AUTOCONF_ERR 2>&1"

调试发现真正的报错信息为:
/opt/LuaJIT-2.0.2/lib/libluajit-5.1.a(lj_clib.o): In function clib_getsym': /run/shm/ngx_openresty-1.4.3.4/build/LuaJIT-2.0.2/src/lj_clib.c:140: undefined reference to dlsym'
/opt/LuaJIT-2.0.2/lib/libluajit-5.1.a(lj_clib.o): In function clib_loadlib': /run/shm/ngx_openresty-1.4.3.4/build/LuaJIT-2.0.2/src/lj_clib.c:117: undefined reference to dlopen'

LuaJIT-2.0.2/lib/pkgconfig/luajit.pc 中:
Requires:
Libs: -L${libdir} -l${libname}
Libs.private: -Wl,-E -lm -ldl

链接阶段用静态库的话, 需要在gcc加 -ldl 参数..

修改./bundle/ngx_lua-0.9.2/config, 添加 -ldl 参数后编译成功. :-)

[agentzh]

You don't need to edit ngx_lua's config file for this. You can just pass the --with-ld-opt="-ldl" to nginx or openresty's ./configure script.

BTW, this place is supposed to be English only. If you really want to use Chinese, please join the openresty (Chinese) mailing list and post there instead:

https://groups.google.com/group/openresty

Thank you for your cooperation!

[cf2012]

I passed the `--with-ld-opt="-ldl" to openresty's ./configure and got the same error.

$ tail -20 ngx_openresty-1.4.3.4/build/nginx-1.4.3/objs/autoconf.err

/run/shm/ngx_openresty-1.4.3.4/build/LuaJIT-2.0.2/src/lj_clib.c:125: undefined reference to `dlerror'
/dev/shm/LuaJIT-2.0.2/lib/libluajit-5.1.a(lj_clib.o): In function `clib_unloadlib':
/run/shm/ngx_openresty-1.4.3.4/build/LuaJIT-2.0.2/src/lj_clib.c:135: undefined reference to `dlclose'
/dev/shm/LuaJIT-2.0.2/lib/libluajit-5.1.a(lj_clib.o): In function `clib_error_':
/run/shm/ngx_openresty-1.4.3.4/build/LuaJIT-2.0.2/src/lj_clib.c:37: undefined reference to `dlerror'
collect2: ld returned 1 exit status
----------

#include <sys/types.h>
#include <unistd.h>
#include <lauxlib.h>

int main() {
    (void) luaL_newstate();;
    return 0;
}

----------
cc -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 \
-I /opt/LuaJIT-2.0.2/include/luajit-2.0 \
-o objs/autotest objs/autotest.c \
-Wl,-rpath,/opt/LuaJIT-2.0.2/lib \
-ldl -L/opt/LuaJIT-2.0.2/lib -lluajit-5.1 -lm
----------

I put "-ldl" to the end of line .
cc -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -I /opt/LuaJIT-2.0.2/include/luajit-2.0
-o objs/autotest objs/autotest.c
-Wl,-rpath,/opt/LuaJIT-2.0.2/lib -L/opt/LuaJIT-2.0.2/lib -lluajit-5.1 -lm -ldl

and it works.

[agentzh]

Oh right. the order matters. I'll look into this. Thanks for the feedback.

[agentzh]

@cf2012 Just committed a fix to the git master branch of ngx_lua. Thank you for the report and sorry for the delay on my side!

[jlynet]

@cf2012 能帮看一下这个问题吗？
checking for LuaJIT library in /usr/local/lib and /usr/local/include/luajit-2.0 (win32) ...
#include <sys/types.h>

#include <lauxlib.h>

int main(void) {
#if LUA_VERSION_NUM != 501

error unsupported Lua language version

#endif
(void) luaL_newstate();;
return 0;
}

/bin/sh -c cl -I/usr/local/include/luajit-2.0 -W3 -DFD_SETSIZE=1024 -I /usr/local/include/luajit-2.0 -o objs/autotest objs/autotest.c -L/usr/local/lib -L/usr/local/lib -llua51 >> objs/autoconf.err 2>&1
not found
./auto/configure: error: ngx_http_lua_module requires the Lua or LuaJIT library and LUAJIT_LIB is defined as /usr/local/lib and LUAJIT_INC (path for lua.h) /usr/local/include/luajit-2.0, but we cannot find LuaJIT there.

[agentzh]

@ai930 Please, no Chinese here. This place is considered English only. If you really
want to use Chinese, please join the openresty (Chinese) mailing list instead.
Please see https://openresty.org/en/community.html Thanks for your cooperation.

Also, please do not hijack and comment on unrelated github issues, especially this closed one. This is rude.