我需要编译一个静态链接到lua库（liblua.a）并动态链接到dl库（libdl.so）的模块。
我编译了将其链接到dl库的C源文件（generic_loader.c）：
$ gcc -g generic_loader.c -shared -fpic -ldl -o _loader.o
没有显示任何错误，因为我可以看到链接的库和符号解析：
$ ldd _loader.o
_loader.o:
linux-vdso.so.1 => (0x00007fff231fe000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f7397949000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7397582000)
/lib64/ld-linux-x86-64.so.2 (0x00007f7397d6e000)
$ nm _loader.o
_loader.o:
0000000000201078 B __bss_start
0000000000201078 b completed.6972
w __cxa_finalize@@GLIBC_2.2.5
00000000000008d0 t deregister_tm_clones
U dlerror@@GLIBC_2.2.5
U dlopen@@GLIBC_2.2.5
U dlsym@@GLIBC_2.2.5
0000000000000940 t __do_global_dtors_aux
0000000000200df0 t __do_global_dtors_aux_fini_array_entry
0000000000201070 d __dso_handle
0000000000200e00 d _DYNAMIC
0000000000201078 D _edata
0000000000201080 B _end
0000000000000aec T _fini
0000000000000980 t frame_dummy
0000000000200de8 t __frame_dummy_init_array_entry
0000000000000ba8 r __FRAME_END__
0000000000201000 d _GLOBAL_OFFSET_TABLE_
w __gmon_start__
00000000000007e8 T _init
w _ITM_deregisterTMCloneTable
w _ITM_registerTMCloneTable
0000000000200df8 d __JCR_END__
0000000000200df8 d __JCR_LIST__
w _Jv_RegisterClasses
00000000000009b5 T load_as_global
0000000000000aab T luaopen_genericloader
U lua_pushboolean
U lua_pushcclosure
U lua_pushnil
U lua_pushstring
U lua_setfield
U lua_tolstring
0000000000000900 t register_tm_clones
0000000000201078 d __TMC_END__
未解析的符号属于lua库，应该在下一步处理，所以我猜这个二进制文件没有问题。
所以我编译了生成的二进制文件_loader.so，以便将它静态链接到lib lua：
$ gcc -g -shared -fpic _loader.o /usr/local/lib/liblua.a -o genericloader.so
再次，没有显示错误。但是当我列出符号时，缺少所有dl和lua符号，以及load_as_global和luaopen_genericloader，这两个函数在generic_loader.c中定义：
$ldd genericloader.so
genericloader.so:
linux-vdso.so.1 => (0x00007fff7cdfe000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f360ad0d000)
/lib64/ld-linux-x86-64.so.2 (0x00007f360b2f4000)
$ nm genericloader.so
genericloader.so:
0000000000201030 B __bss_start
0000000000201030 b completed.6972
w __cxa_finalize@@GLIBC_2.2.5
0000000000000530 t deregister_tm_clones
00000000000005a0 t __do_global_dtors_aux
0000000000200e08 t __do_global_dtors_aux_fini_array_entry
0000000000201028 d __dso_handle
0000000000200e18 d _DYNAMIC
0000000000201030 D _edata
0000000000201038 B _end
0000000000000618 T _fini
00000000000005e0 t frame_dummy
0000000000200e00 t __frame_dummy_init_array_entry
0000000000000628 r __FRAME_END__
0000000000201000 d _GLOBAL_OFFSET_TABLE_
w __gmon_start__
00000000000004e0 T _init
w _ITM_deregisterTMCloneTable
w _ITM_registerTMCloneTable
0000000000200e10 d __JCR_END__
0000000000200e10 d __JCR_LIST__
w _Jv_RegisterClasses
0000000000000560 t register_tm_clones
0000000000201030 d __TMC_END__
我是否遗漏了某些内容，编辑中的一步或gcc的选项？
提前致谢。