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Accepted
Adam Davis
Asked: 2019-03-06 11:51:29 +0800 CST

链接器没有找到 libsystemd

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我正在尝试编写一个systemd使用看门狗的服务，然后

sudo apt install libsystemd-dev

我检查以确保它可用：

$ ldconfig -p |grep systemd
    libsystemd.so.0 (libc6,x86-64) => /lib/x86_64-linux-gnu/libsystemd.so.0
    libsystemd.so (libc6,x86-64) => /lib/x86_64-linux-gnu/libsystemd.so
    libnss_systemd.so.2 (libc6,x86-64) => /lib/x86_64-linux-gnu/libnss_systemd.so.2

然后检查以确保链接器可以找到它：

$ echo "int main(){}" | gcc -x c++ -Wl,--no-as-needed -llibsystemd - && ldd a.out | grep libsystemd
/usr/bin/ld: cannot find -llibsystemd
collect2: error: ld returned 1 exit status

为什么ld找不到呢？

compiling symbolic-link 18.04 ld

1 个回答

  1. Best Answer

    -llibsystemd不寻找libsystemd- 它寻找liblibsystemd

    如中所述man g++：

      -l library
       The linker searches a standard list of directories for the library,
       which is actually a file named liblibrary.a.  The linker then uses
       this file as if it had been specified precisely by name.

    所以你要-lsystemd

    echo "int main(){}" | gcc -x c++ -Wl,--no-as-needed -lsystemd - && ldd a.out | grep libsystemd
    • 2

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