cmake:VS2015和GCC编译paho.mqtt C/C++ client

paho.mqtt.c是eclipse开发的C语言跨平台mqtt client 开源库,paho.mqtt.cpp是对应的C++ Client,paho.mqtt支持CMAKE编译，本文以脚本形式提供了使用CMAKE基于VS2015/Windows以及GCC/MinGW的编译过程。

环境要求

cmake 这是必须的编译工具

Visual Studio 2015 OR MinGW for windows

gcc for linux

Visual Studio 2015 编译脚本

msvc_build.bat
要求paho.mqtt.c,paho.mqtt.cpp的源码文件夹与msvc_build.bat脚本在同一级文件夹
执行以下脚本会编译出paho.mqtt.c静态库,包括Debug和Release版本并安装到
release\paho_mqtt_c_windows_vc_x86_64 文件夹下,
如果指定了/CPP参数，则会编译paho.mqtt.cpp安装到release\paho_mqtt_cpp_windows_vc_x86_64
如果指定了/S参数还会编译对应的动态库

:: 基于 Windows Visual Studio 2015 的 paho mqtt c/cpp 编译脚本
:: 可选参数:
::   /CPP            - 编译paho.mqtt.cpp
::   /C              - 编译paho.mqtt.c
::   /T              - 编译运行单元测试
::   /E              - 编译例子程序
::   /S              - 编译动态库
::   /MT             - 指定/MT编译选项,默认使用/MD

@ECHO OFF
SETLOCAL
ECHO make paho mqtt VS2015 project
IF NOT DEFINED VS140COMNTOOLS (
	ECHO vs2015 NOT FOUND.
	EXIT /B -1
)
ECHO vs2015 found.
WHERE cmake
IF ERRORLEVEL 1 (
	ECHO cmake NOT FOUND.
	EXIT /B -1
)
ECHO cmake found
SET sh_folder=%~dp0
:: 删除最后的 '\'
SET sh_folder=%sh_folder:~0,-1%

SET PROJECT_TYPE=c
SET BUILD_SAMPLES=FALSE
SET ENABLE_TEST=OFF
SET rel_suffix=_windows_vc_x86-64
SET with_static_crt=OFF
SET BUILD_SHARED=OFF
:: parse command arguments
:loop
IF x%1 == x GOTO :pare_end
IF /I "%1" == "/CPP"    SET PROJECT_TYPE=cpp
IF /I "%1" == "/C"      SET PROJECT_TYPE=c
IF /I "%1" == "/T"      SET ENABLE_TEST=TRUE
IF /I "%1" == "/E"      SET BUILD_SAMPLES=TRUE
IF /I "%1" == "/MT"     SET with_static_crt=ON && SET rel_suffix=_windows_vc_mt_x86-64

SHIFT
GOTO :loop
:pare_end

SET src_folder=paho.mqtt.%PROJECT_TYPE%
SET release_prefix=paho_mqtt_%PROJECT_TYPE%

SET cmake_prefix_path=
IF "%PROJECT_TYPE%" == "cpp" (
    SET cmake_prefix_path=-DCMAKE_PREFIX_PATH=%sh_folder%\release\paho_mqtt_c%rel_suffix%
)
SET _build_test=-DPAHO_ENABLE_TESTING=%ENABLE_TEST%
IF "%PROJECT_TYPE%" == "cpp" (
    SET _build_test=-DPAHO_BUILD_TESTS=%ENABLE_TEST%
)

SET project_folder=%sh_folder%\build\%release_prefix%.vs2015
SET outdir=%sh_folder%\release\%release_prefix%%rel_suffix%
IF "%OUTDIR%x" == "x" SET OUTDIR=%outdir%

ECHO project_folder=%project_folder%
ECHO OUTDIR=%OUTDIR%

:: 生成项目工程文件
IF EXIST %project_folder% RMDIR %project_folder% /s/q 
MKDIR %project_folder% 
PUSHD %project_folder% || EXIT /B

IF NOT DEFINED VisualStudioVersion (
	ECHO make MSVC environment ...
	CALL "%VS140COMNTOOLS%..\..\vc/vcvarsall" x86_amd64
)

ECHO creating x86_64 Project for Visual Studio 2015 ...
CMAKE %sh_folder%\%src_folder% -G "Visual Studio 14 2015 Win64" -DCMAKE_INSTALL_PREFIX=%OUTDIR% ^
	-DCMAKE_USER_MAKE_RULES_OVERRIDE=%sh_folder%\cmake\compiler_flag_overrides.cmake ^
    -DPAHO_BUILD_SAMPLES=%BUILD_SAMPLES% ^
	%_build_test% ^
    -DCMAKE_DEBUG_POSTFIX=_d ^
	-DWITH_STATIC_CRT=%with_static_crt% ^
    %cmake_prefix_path% ^
    -DPAHO_BUILD_STATIC=TRUE -DPAHO_BUILD_SHARED=%BUILD_SHARED% -DPAHO_WITH_SSL=FALSE	|| EXIT /B

cmake --build . --config Release --target install -- /maxcpucount || EXIT /B
cmake --build . --config Debug   --target install -- /maxcpucount || EXIT /B
POPD
ENDLOCAL

GNU C编译脚本

gnu_build.sh
要求paho.mqtt.c,paho.mqtt.cpp的源码文件夹与msvc_build.bat脚本在同一级文件夹
执行以下脚本同会编译出paho.mqtt.c静态库,并安装到release/paho_mqtt_c-$machine 文件夹下
如果未指定环境变量BUILD_TYPE为DEBUG,默认编译Release版本
如果指定了CPP参数，则会编译paho.mqtt.cpp安装到release\paho_mqtt_cpp-$machine文件夹下
如果指定了BUILD_SHARED参数还会编译对应的动态库

#!/bin/bash
# paho.mqtt C/C++ 编译脚本(支持交叉编译)
# Optional Command Arguments:
#    ONLYBUILD     不执行 cmake 创建工程只编译版本
#    C             build paho.mqtt.c
#    CPP           build paho.mqtt.cpp
#	 BUILD_SAMPLES build samples
#	 BUILD_TEST    build test
#	 BUILD_SHARED  build dynamic library
# Optional Environment Variables: 
#    TOOLCHAIN_FILE 指定交叉编译的工具链文件
# 	 MACHINE 目标平台, such as x86_64-linux-gnu,默认使用当前系统平台
#    PREFIX 安装路径
#    PROJECT_FOLDER cmake 生成的工程文件(Makefile)文件夹
#    BUILD_TYPE 编译版本类型(DEBUG|RELEASE),默认 RELEASE

#字符串转大写
#参数：1字符串
function string_toupper()
{
    echo $1 | tr '[a-z]' '[A-Z]'
}
sh_folder=$(cd "$(dirname $0)"; pwd -P)
folder_name=$(basename $sh_folder) 
# 定义编译的版本类型(DEBUG|RELEASE)
build_type=RELEASE
[[ "$(string_toupper $BUILD_TYPE)" =~ DEBUG|RELEASE ]] && build_type=$(string_toupper ${BUILD_TYPE})

echo build_type=$build_type

PROJECT_TYPE=c
# 执行 cmake 创建工程
create_prj=ON
build_examples=OFF
enable_test=OFF
build_shared=OFF
while [[ $# -gt 0 ]]
do
# 转大写
key=$(string_toupper ${1})
case $key in
C)
	PROJECT_TYPE=c;shift;;
CPP)
	PROJECT_TYPE=cpp;shift;;
ONLYBUILD)
	create_prj=OFF;shift;;
BUILD_SAMPLES)
	build_examples=ON;shift;;
BUILD_TEST)
	enable_test=ON;shift;;
BUILD_SHARED)
	build_shared=ON;shift;;
*) echo INVALID ARGUMENT $key;exit 255;shift;;
esac
done

src_folder=paho.mqtt.$PROJECT_TYPE
release_prefix=paho_mqtt_$PROJECT_TYPE

machine=$(g++ -dumpmachine)

[ -n "$MACHINE" ] && machine=$MACHINE


cmake_prefix_path=
[ "$PROJECT_TYPE" = "cpp" ] && cmake_prefix_path=-DCMAKE_PREFIX_PATH=$sh_folder/release/paho_mqtt_c-$machine

_build_test="-DPAHO_ENABLE_TESTING=$ENABLE_TEST"
[ "$PROJECT_TYPE" = "cpp" ] && _build_test="-DPAHO_BUILD_TESTS=$ENABLE_TEST"

# 工具链文件
toolchain=
[ -n "$TOOLCHAIN_FILE" ] && toolchain="-DCMAKE_TOOLCHAIN_FILE=$TOOLCHAIN_FILE"

# 安装路径
[ -n "$PREFIX" ] && install_prefix="$PREFIX"
[ -z "$PREFIX" ] && install_prefix=$sh_folder/release/$release_prefix-$machine

# 编译路径
[ -n "$PROJECT_FOLDER" ] && prj_folder="$PROJECT_FOLDER"
[ -z "$PROJECT_FOLDER" ] && prj_folder=$sh_folder/build/$release_prefix-$machine

echo =========================================================================
echo       Configuration: $src_folder $machine:$build_type
echo     Build Directory: $prj_folder
echo   Install Directory: $install_prefix
echo =========================================================================

if [[ "${create_prj}" = ON ]]
then
	[ -d $prj_folder ] && rm -fr $prj_folder
	mkdir -p $prj_folder || exit 

	pushd $prj_folder || exit
	echo "creating Project for $machine ..."
	cmake "$sh_folder/$src_folder" -G "Eclipse CDT4 - Unix Makefiles" -DCMAKE_BUILD_TYPE=$build_type \
		-DCMAKE_INSTALL_PREFIX=$install_prefix \
		-DPAHO_BUILD_SAMPLES=$build_examples \
		$_build_test \
		-DCMAKE_DEBUG_POSTFIX=_d \
		-DPAHO_BUILD_STATIC=TRUE -DPAHO_BUILD_SHARED=$build_shared -DPAHO_WITH_SSL=FALSE \
		$cmake_prefix_path $toolchain || exit

else
	pushd $prj_folder || exit
fi

cmake --build . --target install/strip -- -j8 || exit 

popd

paho.mqtt.build

以上完整脚本参见码云仓库 https://gitee.com/l0km/paho.mqtt.build.git

如果你只想编译paho.mqtt C/C++,可以如下直接克隆 https://gitee.com/l0km/paho.mqtt.build.git 这个项目到本地(一定要加--recursive参数)

git clone --recursive https://gitee.com/l0km/paho.mqtt.build.git

然后执行其中的msvc_build.bat或gnu_build.sh就可以编译出你想要的paho.mqtt C/C++库