C++ 如何在生成前在cmake中执行命令？_C++_C_Makefile_Cmake

C++ 如何在生成前在cmake中执行命令？

c++ c makefile cmake

C++ 如何在生成前在cmake中执行命令？,c++,c,makefile,cmake,C++,C,Makefile,Cmake,我希望CMake在开始其生成过程之前运行一个命令因此，我在*CMakeLists.txt`的开头添加了execute\u process，但预期的提示只是零星出现的 cmake_minimum_required(VERSION 3.5) project(amba_ctrl_datalinkmsg) execute_process(COMMAND @echo 'HUHU HUHU HUHU') execute_process(COMMAND pwd) execute_process(COMM

我希望CMake在开始其生成过程之前运行一个命令

因此，我在*CMakeLists.txt`的开头添加了

execute\u process

，但预期的提示只是零星出现的

cmake_minimum_required(VERSION 3.5)

project(amba_ctrl_datalinkmsg)

execute_process(COMMAND @echo 'HUHU HUHU HUHU')
execute_process(COMMAND pwd)
execute_process(COMMAND make -C ${CMAKE_CURRENT_SOURCE_DIR}/msg -f Makefile)

include_directories(include)
add_library(
    ${PROJECT_NAME} STATIC
    "src/source.cpp"
)

有什么想法吗

我为何要这样做：

我需要从一些简单的定义文件生成一个Cpp类

检查生成器的源或定义文件是否比生成的类文件更新

如果需要，构建生成器

生成源文件

构建静态库

我用一个简单的Makefile解决了第1点到第3点。4.使用CMakeList.txt完成，因为此库是更大项目中的子项目

从上面输出到CMakeList.txt，不带my

echo

：

Process package 'amba_ctrl_datalinkmsg' with context:
--------------------------------------------------------------------------------
 source_space => /home/.../src/amba_ctrl/amba_ctrl_datalinkmsg
  build_space => /home/.../build/amba_ctrl_datalinkmsg
install_space => /home/.../install
   make_flags => -j8, -l8
  build_tests => False
--------------------------------------------------------------------------------
+++ Building 'amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make cmake_check_build_system' in '/home/.../build/amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make -j8 -l8' in '/home/.../build/amba_ctrl_datalinkmsg'
make[2]: *** No rule to make target '/home/.../src/source.cpp', needed by 'CMakeFiles/amba_ctrl_datalinkmsg.dir/src/source.cpp.o'. Stop.
CMakeFiles/Makefile2:99: recipe for target 'CMakeFiles/amba_ctrl_datalinkmsg.dir/all' failed
make[1]: *** [CMakeFiles/amba_ctrl_datalinkmsg.dir/all] Error 2
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2

如果makefile调用正确，cmake可以找到

源.cpp

。但如果没有调用，则不存在源和头

在打电话给msgGen之前，先看一下树

.
├── CMakeLists.txt
├── msg
│   ├── def1.msg
│   ├── def2.msg
│   ├── def3.msg
│   ├── Makefile
│   └── msgGen.cpp
├── package.xml
└── README.md

.
├── CMakeLists.txt
├── include
│   └── source.h
├── msg
│   ├── def1.msg
│   ├── def2.msg
│   ├── def3.msg
│   ├── Makefile
│   ├── msgGen
│   └── msgGen.cpp
├── package.xml
├── README.md
└── src
    └── source.cpp

呼叫msgGen后的树

.
├── CMakeLists.txt
├── msg
│   ├── def1.msg
│   ├── def2.msg
│   ├── def3.msg
│   ├── Makefile
│   └── msgGen.cpp
├── package.xml
└── README.md

.
├── CMakeLists.txt
├── include
│   └── source.h
├── msg
│   ├── def1.msg
│   ├── def2.msg
│   ├── def3.msg
│   ├── Makefile
│   ├── msgGen
│   └── msgGen.cpp
├── package.xml
├── README.md
└── src
    └── source.cpp

添加

RESULT\u变量

alex:overlay_ws$ ament build --only-packages amba_ctrl_datalinkmsg
# Topological order
 - amba_ctrl_datalinkmsg

Process package 'amba_ctrl_datalinkmsg' with context:
--------------------------------------------------------------------------------
 source_space => /home/.../src/amba_ctrl/amba_ctrl_datalinkmsg
  build_space => /home/.../build/amba_ctrl_datalinkmsg
install_space => /home/.../install
   make_flags => -j8, -l8
  build_tests => False
--------------------------------------------------------------------------------
+++ Building 'amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make cmake_check_build_system' in '/home/.../build/amba_ctrl_datalinkmsg'
make[1]: Entering directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
make gen
make[2]: Entering directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
msgGen: build msgGen
g++ msgGen.cpp -o msgGen --std=c++11 -D'GENTARGETCPP="../src/source.cpp"' -D'GENTARGETH="../include/source.h"'
msgGen: run msgGen
dlCpm.msg dlIomReceiver.msg dlIomSender.msg
mkdir -p ../src/
mkdir -p ../include/
./msgGen
make[2]: Leaving directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
msgGen: ready
make[1]: Leaving directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
-- Found ament_cmake: 0.0.0 (/home/alex/git/AMBA/Software/ros2_ws/install/share/ament_cmake/cmake)
-- Using PYTHON_EXECUTABLE: /usr/bin/python3
-- Configuring done
-- Generating done
-- Build files have been written to: /home/.../build/amba_ctrl_datalinkmsg
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make -j8 -l8' in '/home/.../build/amba_ctrl_datalinkmsg'
[ 50%] Building CXX object CMakeFiles/amba_ctrl_datalinkmsg.dir/src/source.cpp.o
[100%] Linking CXX static library libamba_ctrl_datalinkmsg.a
[100%] Built target amba_ctrl_datalinkmsg
+++ Installing 'amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__install.sh && /usr/bin/make install' in '/home/.../build/amba_ctrl_datalinkmsg'
[100%] Built target amba_ctrl_datalinkmsg
Install the project...
-- Install configuration: ""
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/environment/library_path.sh
-- Up-to-date: /home/.../install/share/ament_index/resource_index/package_run_dependencies/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/ament_index/resource_index/parent_prefix_path/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.bash
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.sh
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.zsh
-- Up-to-date: /home/.../install/share/ament_index/resource_index/packages/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsg.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_dependencies-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_include_directories-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_libraries-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsgConfig.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsgConfig-version.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/package.xml
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/register_amba_ctrl_datalinkmsg_implementation.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/get_amba_ctrl_datalinkmsg_typesupport.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/configure_amba_ctrl_datalinkmsg_library.cmake
-- Up-to-date: /home/.../install/include/amba_ctrl_datalinkmsg
-- Installing: /home/.../install/include/amba_ctrl_datalinkmsg/source.h
-- Installing: /home/.../install/lib/libamba_ctrl_datalinkmsg.a
-- [ament] Deploying: /home/.../install/local_setup.bash
-- [ament] Deploying: /home/.../install/local_setup.sh
-- [ament] Deploying: /home/.../install/local_setup.zsh
-- [ament] Deploying: /home/.../install/setup.bash
-- [ament] Deploying: /home/.../install/setup.sh
-- [ament] Deploying: /home/.../install/setup.zsh
-- [ament] Deploying: /home/.../install/_order_packages.py

alex:overlay_ws$ ament build --only-packages amba_ctrl_datalinkmsg
# Topological order
 - amba_ctrl_datalinkmsg

Process package 'amba_ctrl_datalinkmsg' with context:
--------------------------------------------------------------------------------
 source_space => /home/.../src/amba_ctrl/amba_ctrl_datalinkmsg
  build_space => /home/.../build/amba_ctrl_datalinkmsg
install_space => /home/.../install
   make_flags => -j8, -l8
  build_tests => False
--------------------------------------------------------------------------------
+++ Building 'amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make cmake_check_build_system' in '/home/.../build/amba_ctrl_datalinkmsg'
make[1]: Entering directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
make gen
make[2]: Entering directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
msgGen: build msgGen
g++ msgGen.cpp -o msgGen --std=c++11 -D'GENTARGETCPP="../src/source.cpp"' -D'GENTARGETH="../include/source.h"'
msgGen: run msgGen
dlCpm.msg dlIomReceiver.msg dlIomSender.msg
mkdir -p ../src/
mkdir -p ../include/
./msgGen
make[2]: Leaving directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
msgGen: ready
make[1]: Leaving directory '/home/.../src/amba_ctrl/amba_ctrl_datalinkmsg/msg'
-- Found ament_cmake: 0.0.0 (/home/alex/git/AMBA/Software/ros2_ws/install/share/ament_cmake/cmake)
-- Using PYTHON_EXECUTABLE: /usr/bin/python3
-- Configuring done
-- Generating done
-- Build files have been written to: /home/.../build/amba_ctrl_datalinkmsg
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__build.sh && /usr/bin/make -j8 -l8' in '/home/.../build/amba_ctrl_datalinkmsg'
[ 50%] Building CXX object CMakeFiles/amba_ctrl_datalinkmsg.dir/src/source.cpp.o
[100%] Linking CXX static library libamba_ctrl_datalinkmsg.a
[100%] Built target amba_ctrl_datalinkmsg
+++ Installing 'amba_ctrl_datalinkmsg'
==> '. /home/.../build/amba_ctrl_datalinkmsg/cmake__install.sh && /usr/bin/make install' in '/home/.../build/amba_ctrl_datalinkmsg'
[100%] Built target amba_ctrl_datalinkmsg
Install the project...
-- Install configuration: ""
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/environment/library_path.sh
-- Up-to-date: /home/.../install/share/ament_index/resource_index/package_run_dependencies/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/ament_index/resource_index/parent_prefix_path/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.bash
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.sh
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/local_setup.zsh
-- Up-to-date: /home/.../install/share/ament_index/resource_index/packages/amba_ctrl_datalinkmsg
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsg.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_dependencies-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_include_directories-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/ament_cmake_export_libraries-extras.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsgConfig.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/amba_ctrl_datalinkmsgConfig-version.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/package.xml
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/register_amba_ctrl_datalinkmsg_implementation.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/get_amba_ctrl_datalinkmsg_typesupport.cmake
-- Up-to-date: /home/.../install/share/amba_ctrl_datalinkmsg/cmake/configure_amba_ctrl_datalinkmsg_library.cmake
-- Up-to-date: /home/.../install/include/amba_ctrl_datalinkmsg
-- Installing: /home/.../install/include/amba_ctrl_datalinkmsg/source.h
-- Installing: /home/.../install/lib/libamba_ctrl_datalinkmsg.a
-- [ament] Deploying: /home/.../install/local_setup.bash
-- [ament] Deploying: /home/.../install/local_setup.sh
-- [ament] Deploying: /home/.../install/local_setup.zsh
-- [ament] Deploying: /home/.../install/setup.bash
-- [ament] Deploying: /home/.../install/setup.sh
-- [ament] Deploying: /home/.../install/setup.zsh
-- [ament] Deploying: /home/.../install/_order_packages.py
alex:overlay_ws$

删除src和include dir

感谢@Tsyvarev和其他人。以下是我选择的方式：

CMakeList.txt

它与相应的msg/Makefile一起运行

MSGDEFS=*.msg
目标=msgGen
SOURCE=msgGen.cpp
GENTARGETCPP=../src/DatalinkMsg.cpp
GENTARGETH=../include/DatalinkMsg.h
全部：$（GENTARGETCPP）$（GENTARGETH）$（MSGDEFS）$（来源）
$（GENTARGETCPP）：$（MSGDEFS）$（来源）
制造发电机
$（gentarges）：$（MSGDEFS）$（来源）
制造发电机
gen:$（目标）$（MSGDEFS）$（来源）
mkdir-p../src/
mkdir-p../include/
./$<
$（目标）：msgGen.cpp
g++$<-o$@--std=c++11
清洁：
rm-f$（目标）$（GENTARGETCPP）$（GENTARGETH）

execute\u process（）

发生在配置阶段，即生成阶段之前。您预期会发生什么，然后又发生了什么？我想运行源代码生成。这将在这个CMakelist.txt中为目标生成源，然后我运行cmake'huhu…'从未打印到终端。此外，Makefile的打印输出也不可见。如果我用上面的命令手动运行make，我可以看到输出。

在检查依赖项之前，似乎没有调用“execute\u process”。

-“execute\u process”作为配置过程的一部分运行（

cmake

call），在这个阶段没有依赖项检查。但是：如果您在已经配置的项目上调用

make

，则只有在

CMakeLists.txt

发生更改时才会重新配置。为什么不使用公共

add\u custom\u target

add\u custom\u命令

方法来生成源文件？例如，

add_custom_命令（输出${CMAKE_CURRENT_SOURCE_DIR}/src/SOURCE.cpp命令make-C…

，

add_custom_目标（生成依赖${CMAKE_CURRENT_SOURCE_DIR}/src/SOURCE.cpp）

，

添加依赖项（${PROJECT_NAME}generate）

。

MSGDEFS = *.msg

TARGET = msgGen
SOURCE = msgGen.cpp

GENTARGETCPP = ../src/DatalinkMsg.cpp
GENTARGETH   = ../include/DatalinkMsg.h

all: $(GENTARGETCPP) $(GENTARGETH) $(MSGDEFS) $(SOURCE)

$(GENTARGETCPP): $(MSGDEFS) $(SOURCE)
    make gen

$(GENTARGETH): $(MSGDEFS) $(SOURCE)
    make gen

gen: $(TARGET) $(MSGDEFS) $(SOURCE)
    mkdir -p ../src/
    mkdir -p ../include/
    ./$<

$(TARGET): msgGen.cpp
    g++ $< -o $@ --std=c++11

clean:
    rm -f $(TARGET) $(GENTARGETCPP) $(GENTARGETH)