如何阻止CMake链接libstdc ++

Question

我有一个非常简单的CMakeLists.txt用于C++项目,它构建了一个共享库:

add_library(foo SHARED
    ${HDR_PUBLIC}
    ${SOURCES})

链接库时,CMake自动使用-lstdc ++.我怎么能阻止它这样做？

Answer 1

您可以将-stdlib = libc ++添加到编译器标志.

简单的例子:

cmake_minimum_required(VERSION 2.8.4)
project(test)
set(CMAKE_VERBOSE_MAKEFILE TRUE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -v -stdlib=libc++")
add_executable(test main.cpp)

给出输出:

"/usr/bin/ld" ... -o test ... -lc++ ...

默认情况下:

cmake_minimum_required(VERSION 2.8.4)
project(test)
set(CMAKE_VERBOSE_MAKEFILE TRUE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -v")
add_executable(test main.cpp)

链接到stdc ++:

"/usr/bin/ld" ... -o test ... -lstdc++ ...

[更新]

如果你根本不需要链接到c ++ lib - 使用'-nodefaultlibs'作为链接器标志,使用'-nostdinc ++'来编译标志.您可能需要链接一些默认库,例如'-lSystem'.

Answer 2

set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "")
set_target_properties(yourtarget PROPERTIES LINKER_LANGUAGE C)

资料来源：http : //cmake.3232098.n2.nabble.com/setting-LINKER-LANGUAGE-still-adds-lstdc-td7581940.html