如何在不同的CMake文件之间共享变量,并显示以下示例来说明我的问题:
cmake_minimum_required(VERSION 2.6)
project(test)
set(Var3 "Global variable")
add_subdirectory(${test_SOURCE_DIR}/exe)
add_subdirectory(${test_SOURCE_DIR}/dll)
set(Var1 "this is variable 1")
set(Var1 ${Var1} " added to varible 1")
message(STATUS ${Var1})
set(Var2 "this is variable 2")
message(STATUS ${Var2})
message(STATUS ${Var1})
message(STATUS ${Var3})
在这个例子中,VAR3可以的CMake的文件中可以看出exe,并dll因为它是在定义Main.但是,exe将不会在其中定义Var1 dll.我只是很好奇:有没有办法让var1在exeobservable中定义dll？
我正在构建一个包含很多子项目的项目。例如作为...
LibA (build as shared library)
LibB (depends on LibA & build as shared library)
AppB (depends on LinB)
目录结构（我想要的）是...
bin/
output/
src/libA/
src/libB/
src/appB/
每个子项目（LibA、LibB 和 AppB）都有自己的 CMakeLists.txt 文件。
我想 ..
1. Build LibA as shared library (I know how to do it)
2. Build LibB as shared library with linking of LibA (Don't Know how to do)
Explanation: When I start building LibB,
LibA build first and
ready to link for LibB
when LibB ready to finish
3. …我正在学习使用 Cmake 构建一个库。构建库的代码结构如下：
include:
Test.hpp
ITest.hpp // interface
src:
Test.cpp
ITest.cpp
在CMakeLists.txt中，我用来建库的语句是：
file(GLOB SRC_LIST "src/iTest.cpp" "src/Test.cpp" "include/Test.hpp"
"include/iTest.hpp" "include/deadreckoning.hpp")
add_library(test SHARED ${SRC_LIST})
target_link_libraries( test ${OpenCV_LIBS}) // link opencv libs to libtest.so
然后我又写了一个测试文件（main.cpp），把库复制粘贴到同一个目录下，链接库，调用库里面的函数。这个 CMakeLists.txt 是
cmake_minimum_required(VERSION 2.8)
project(myapp)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pthread -O3 -Wall -ftree-vectorize -ffast-math -funroll-loops")
add_executable(myapp main.cpp)
target_link_libraries(myapp "/home/labUser/test_lib/libtest.so")
如果我不将头文件包含在库中，则 main.cpp 将成功编译并运行：
#include <iostream>
using namespace std;
int main(){
cout << "hello world" << endl;
return -1;
}
但是当我包含头文件时#include "ITest.hpp"，它有错误：
fatal error: iTest.hpp: No such file or …