我正在尝试构建一个可移植的gcc,以允许其他人使用不同的系统进行编译。
我使用crosstool-ng
交叉编译gcc-8.2
的{{1}},建立了一个静态工具链。
我创建了以下工具链文件:
x86_64
在我的主机上,它运行良好,可以毫无问题地进行编译,但是当我将工具链文件移到另一台计算机上时,我遇到了问题。如果我尝试在我的cmake中包含线程,则出现以下错误:
#set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR "x86_64")
set(QAMF_ROOT "/opt/hyperserver-dev/x86_64-qamf")
set(COMPILER_ROOT "${QAMF_ROOT}")
set(COMPILER_PREFIX "x86_64-qamf-linux-gnu-")
set(C_COMPILER "gcc")
set(CXX_COMPILER "g++")
# specify the cross compile
set(CMAKE_C_COMPILER ${COMPILER_ROOT}/bin/${COMPILER_PREFIX}${C_COMPILER} )
set(CMAKE_CXX_COMPILER ${COMPILER_ROOT}/bin/${COMPILER_PREFIX}${CXX_COMPILER} )
# HyperServer sysroot path
set(HYPERSERVER_SYSROOT "${COMPILER_ROOT}/x86_64-qamf-linux-gnu/sysroot")
# where is the target environment
set(CMAKE_FIND_ROOT_PATH ${HYPERSERVER_SYSROOT} )
# search for programs in the build host directories
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
这是我的CMakeFiles / txt
CMake Error at /usr/local/share/cmake-3.13/Modules/FindThreads.cmake:54 (message):
FindThreads only works if either C or CXX language is enabled
Call Stack (most recent call first):
CMakeLists.txt:2 (find_package)
-- Configuring incomplete, errors occurred!
make: *** No targets specified and no makefile found. Stop.
答案 0 :(得分:2)
放置
find_package(Threads REQUIRED)
之后
project(HelloWorld C CXX)
这是错误消息所表明的:project()
调用启用了语言,因此查找线程将成功。
通常,所有 find_package
呼叫应该在 project()
呼叫之后。