gcc - / usr / bin / ld错误：无法找到< library>在/ usr / local / lib中通过ldconfig列出它，并将路径添加到ld.so.conf中 [英] gcc - /usr/bin/ld error: cannot find <library> in /usr/local/lib though ldconfig list it, and path added to ld.so.conf

问题描述

我尝试编译一个C ++代码，使用一个我也手动编译并安装在/ usr / local / lib中的库。

编译软件失败在链接步骤：

  / usr / bin / ld：error：找不到-lcppdb 
  $ b $ p似乎g ++在默认情况下不会在 / usr / local / lib  ，同样用于 clang ++  
  g ++ -print-search-dirs＃does不显示/ usr / local / lib 
  
然而事实是 / usr / local / lib 位于我的 /etc/ld.so.conf 中，并且我运行了 ldconfig 作为根，并且实际运行 ldconfig -p | grep cppdb 显示我
  libcppdb_sqlite3.so.0（libc6）=> /usr/local/lib/libcppdb_sqlite3.so.0 
 libcppdb_sqlite3.so（libc6）=> /usr/local/lib/libcppdb_sqlite3.so 
 libcppdb.so.0（libc6）=> /usr/local/lib/libcppdb.so.0 
 libcppdb.so（libc6）=> /usr/local/lib/libcppdb.so 
  
添加选项 -L / usr / local / lib 当然解决了这个问题，但目标是使用配置文件解决方案

p> ld ，链接器不为此使用外部配置文件。 ldconfig 用于加载程序， ld.so 。创建一个makefile，如果你想设置链接器的值。

I try to compile a C++ code, using a library I've also compiled manually and installed in /usr/local/lib

The compilation of the software fails at the linking step:

 /usr/bin/ld: error: cannot find -lcppdb

it seems that g++ does not search by default in /usr/local/lib , same for clang++

 g++ -print-search-dirs # does not show /usr/local/lib

however the fact is /usr/local/lib is in my /etc/ld.so.conf and I did run ldconfig as root, and actually running ldconfig -p | grep cppdb shows me

libcppdb_sqlite3.so.0 (libc6) => /usr/local/lib/libcppdb_sqlite3.so.0
libcppdb_sqlite3.so (libc6) => /usr/local/lib/libcppdb_sqlite3.so
libcppdb.so.0 (libc6) => /usr/local/lib/libcppdb.so.0
libcppdb.so (libc6) => /usr/local/lib/libcppdb.so

adding the option -L/usr/local/lib of course solve the problem, but the goal is to use configuration files

解决方案

ld, the linker, does not use external configuration files for that. ldconfig is for the loader, ld.so. Create a makefile if you want to set values for the linker somewhere.

这篇关于gcc - / usr / bin / ld错误：无法找到< library>在/ usr / local / lib中通过ldconfig列出它，并将路径添加到ld.so.conf中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！