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我无法在 odbc sdk 中编译一些示例。在与图书馆订单混在一起一段时间后，我以某种方式设法获得了对其中少数几个的未定义引用的数量。

可悲的是，我不知道如何摆脱剩余的。这是失败的命令：

g++ -Wall -z defs -m64 -DSIMBA -D_REENTRANT -fPIC -O0 -g -shared Common/TabbedUnicodeFileReader_Linux_x8664_debug.cpp.o Core/QSConnection_Linux_x8664_debug.cpp.o Core/QSDriver_Linux_x8664_debug.cpp.o Core/QSEnvironment_Linux_x8664_debug.cpp.o Core/QSStatement_Linux_x8664_debug.cpp.o DataEngine/QSDataEngine_Linux_x8664_debug.cpp.o DataEngine/QSMetadataHelper_Linux_x8664_debug.cpp.o DataEngine/QSTable_Linux_x8664_debug.cpp.o DataEngine/QSTableUtilities_Linux_x8664_debug.cpp.o DataEngine/QSTypeInfoMetadataSource_Linux_x8664_debug.cpp.o Common/QSTableMetadataFile_Unix_Linux_x8664_debug.cpp.o Common/QSUtilities_Unix_Linux_x8664_debug.cpp.o Main_Unix_Linux_x8664_debug.cpp.o    -Wl,--no-undefined -Wl,--no-allow-shlib-undefined -Wl,--whole-archive,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libSimbaDSI_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libSimbaSupport_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libAEProcessor_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libCore_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libDSIExt_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libExecutor_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libParser_debug.a,/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//Lib/Linux_x8664/libSimbaODBC_debug.a -Wl,--no-whole-archive -Wl,--soname=../Bin/Linux_x8664/libQuickstart_debug.so -L/home/hector/Downloads/SimbaEngineSDK/9.0/DataAccessComponents//ThirdParty/icu/Linux_x8664/lib -licuuc_simba64 -licudata_simba64 -licui18n_simba64 -lpthread -lm -lc -ldl -Wl,--version-script=exports_Linux.map -o ../Bin/Linux_x8664/libQuickstart_debug.so

编辑：缺少符号

/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/libdl.so: undefined reference to `_dl_rtld_di_serinfo@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_dl_allocate_tls_init@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `__libc_stack_end@GLIBC_2.2.5'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_dl_get_tls_static_info@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `__tls_get_addr@GLIBC_2.3'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_dl_deallocate_tls@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_rtld_global@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libc.so.6: undefined reference to `_dl_argv@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libc.so.6: undefined reference to `__libc_enable_secure@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_dl_allocate_tls@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_rtld_global_ro@GLIBC_PRIVATE'
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to `_dl_make_stack_executable@GLIBC_PRIVATE'

固定的：

删除 -Wl,--no-allow-shlib-undefined 似乎可以解决问题。构建的共享库似乎运行良好。

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4 回答 4

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我在完全独立的应用程序中遇到了类似的问题。以下编译时标志对我有用：

-B/usr/lib/gold-ld/

我发现在：

https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/885927

我正在使用 gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1 我试图用 lto 编译。

于 2012-11-27T15:41:40.103 回答
4

You do a very common newbie mistake. you place the libraries to link with in the middle or the beginning of the command line. The linker GCC uses needs dependencies in reverse order. That means if you have an source/object file S using a function in library L, the file A has to be before the library L on the command line.

In short, put the libraries (-lm -lc -ldl) last on the command line instead.

于 2012-08-07T11:01:28.223 回答
2

如果链接器无法解析所有引用的符号，那么这可能是由于提供的库的顺序错误。如果您不确定正确的顺序是什么，则将档案放在“--start-group archives --end-group”中，根据 ld 手册，这将强制链接器重复搜索指定的档案，直到没有创建新的未定义引用。但要注意性能成本。

于 2012-08-07T18:28:59.460 回答
0

OP提到“删除-Wl,--no-allow-shlib-undefined”有帮助。就我而言，我不得不添加相反的内容： -Wl,--allow-shlib-undefined

（旧版本的 GCC 一切正常）

于 2022-01-26T16:54:05.200 回答