Linux LD_LIBRARY_PATH 似乎不起作用
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LD_LIBRARY_PATH doesn't seem to work
提问by
I'm trying to compile a test file:
我正在尝试编译一个测试文件：
gcc -o test test.c -lg2c
but I get the error:
但我收到错误：
/usr/bin/ld: cannot find -lg2c
If I use:
如果我使用：
gcc -o test test.c -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 -lg2c
then it works fine.
然后它工作正常。
So I added the path like so:
所以我添加了这样的路径：
LD_LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/3.4.6:$LD_LIBRARY_PATH
and when I use $LD_LIBRARY_PATHit's listed there, but:
当我使用$LD_LIBRARY_PATH它时，它会在那里列出，但是：
gcc -o test test.c -lg2c
still doesn't work, it gives the same error, I can't figure out why.
仍然不起作用，它给出了同样的错误，我不知道为什么。
I'm using CentOS (2.6.32-279.9.1.el6.x86_64), any help would be greatly appreciated.
我正在使用 CentOS (2.6.32-279.9.1.el6.x86_64)，任何帮助将不胜感激。
EDIT: compiler version:
编辑：编译器版本：
rpm -qa | grep gcc
gcc-4.4.6-4.el6.x86_64
compat-gcc-34-g77-3.4.6-19.el6.x86_64
libgcc-4.4.6-4.el6.x86_64
compat-gcc-34-3.4.6-19.el6.x86_64
gcc-gfortran-4.4.6-4.el6.x86_64
libgcc-4.4.6-4.el6.i686
gcc-c++-4.4.6-4.el6.x86_64
EDIT: I tried using LIBRARY_PATHinstead, now I get a different error:
编辑：我尝试LIBRARY_PATH改用，现在出现不同的错误：
gcc: spec failure: unrecognized spec option 'M'
I have no idea what it means.
我不知道这意味着什么。
采纳答案by dogbane
Try setting LIBRARY_PATH, instead of LD_LIBRARY_PATH.
尝试设置LIBRARY_PATH，而不是LD_LIBRARY_PATH。
From the gccman page:
从gcc手册页：
LIBRARY_PATH
The value of LIBRARY_PATH is a colon-separated list of directories, much like PATH. When configured as a native compiler, GCC tries the directories thus specified when searching for special linker files, if it can't find them using GCC_EXEC_PREFIX. Linking using GCC also uses these directories when searching for ordinary libraries for the -l option (but directories specified with -L come first).
LIBRARY_PATH
LIBRARY_PATH 的值是以冒号分隔的目录列表，很像 PATH。当配置为本地编译器时，GCC 在搜索特殊链接器文件时会尝试这样指定的目录，如果它无法使用 GCC_EXEC_PREFIX 找到它们。在为 -l 选项搜索普通库时，使用 GCC 进行链接也会使用这些目录（但首先使用 -L 指定的目录）。
回答by mazayus
Make sure that you export LD_LIBRARY_PATHafter modifying it. Otherwise GCC won't be able to see the modified version.
确保LD_LIBRARY_PATH在修改后导出。否则 GCC 将无法看到修改后的版本。
LD_LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/3.4.6:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH
gcc -o test test.c -lg2c
回答by cho_uc
Create a new folder inside your home directory (not root directory!).
Copy all the required library associated with -lg2cfrom /usr/lib/gcc/x86_64-redhat-linux/3.4.6to this folder.
在您的主目录（不是根目录！）中创建一个新文件夹。将与-lg2cfrom关联的所有必需库复制/usr/lib/gcc/x86_64-redhat-linux/3.4.6到此文件夹。
Set the path in your bash profile to this new folder.
将 bash 配置文件中的路径设置为这个新文件夹。
I also got this issue, and solve it with this workaround.
Perhaps we (as non-root users) don't have the necessary access/right to /usr/lib/gcc/x86_64-redhat-linux/3.4.6
我也遇到了这个问题，并通过此解决方法解决了它。也许我们（作为非 root 用户）没有必要的访问/权限/usr/lib/gcc/x86_64-redhat-linux/3.4.6
