无法将库目录添加到ld

Question

我在家里创建了自己的库目录(/home/mathieu/lib)。在这个目录中有一个名为libmath.so的库。要将这个目录添加到ld中，我已经在te文件/etc/ld.so.conf中添加了路径。我已经通过执行sudo ldconfig重新加载了缓存。当我执行sudo ldconfig -p | grep libmath.so时，我得到了libmath.so (libc6) => /home/mathieu/lib/libmath.so。所以很管用。

问题所在

当我执行ld -lmath时，我得到：

attempt to open /usr/i486-linux-gnu/lib32/libmath.so failed
attempt to open /usr/i486-linux-gnu/lib32/libmath.a failed
attempt to open /usr/local/lib32/libmath.so failed
attempt to open /usr/local/lib32/libmath.a failed
attempt to open /lib32/libmath.so failed
attempt to open /lib32/libmath.a failed
attempt to open /usr/lib32/libmath.so failed
attempt to open /usr/lib32/libmath.a failed
attempt to open /usr/local/lib/i386-linux-gnu/libmath.so failed
attempt to open /usr/local/lib/i386-linux-gnu/libmath.a failed
attempt to open /usr/local/lib/libmath.so failed
attempt to open /usr/local/lib/libmath.a failed
attempt to open /lib/i386-linux-gnu/libmath.so failed
attempt to open /lib/i386-linux-gnu/libmath.a failed
attempt to open /lib/libmath.so failed
attempt to open /lib/libmath.a failed
attempt to open /usr/lib/i386-linux-gnu/libmath.so failed
attempt to open /usr/lib/i386-linux-gnu/libmath.a failed
attempt to open /usr/lib/libmath.so failed
attempt to open /usr/lib/libmath.a failed
ld: cannot find -lmath

ld甚至不寻求/home/mathieu/lib路径。

gcc test.c -o test -lmath返回

/usr/bin/ld: cannot find -lmath
collect2: error: ld returned 1 exit status

你有解决办法吗？

谢谢。

Answer 1

您可以使用LIBRARY_PATH添加要由gcc搜索以进行编译的目录，

export LIBRARY_PATH=$HOME/lib

或者，可以将库添加到-L命令行标志到gcc中，如下所示

gcc test.c -o test -lmath -L$HOME/lib

问题是，您对/etc/ld.so.conf的修改将在应用程序启动时使用，以找到正确的库(而不是在编译时)。