上一篇博客《mingw(gcc)编译openjpeg》讲了如何用gcc编译openjpeg,但我目前只会在64位平台下生成64位目标代码，如果需要在64位平台生成32位目标代码怎么办？我还没有找到不修改CMakeList.txt的情况下在Windows 64位平台用gcc生成32位代码的办法（待研究），因为我的调试环境还是喜欢用VS2015所以我决定还是用VS2015再把openjpeg编译一遍，而且可以编译32和64位代码，方法比较笨，但总算有效，以后再研究更好的办法。
下面分别说明在win7 x64平台下编译32位和64位代码的过程
下载
原代码下载:https://github.com/uclouvain/openjpeg/archive/version.2.1.zip
编译环境
作者使用的操作系统平台是win7 x64, 编译器是目前最新的vs2015,cmake版本是3.1.0，准备好以上环境就可以开始代码编译了。
先将源码包解压到本地硬盘
D:\os.package\cpp\openjpeg\openjpeg-version.2.1
创建build目录openjpeg-version.2.1.prj：
D:\os.package\cpp\openjpeg>rmdir openjpeg-version.2.1.prj /s/q
D:\os.package\cpp\openjpeg>mkdir openjpeg-version.2.1.prj
D:\os.package\cpp\openjpeg>cd openjpeg-version.2.1.prj
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>
win 7 x64下编译32位openjpeg
安装好VS2015后在命令行下执行set显示环境变量，会有如下图红圈所示的VS140COMNTOOLS变量
这里写图片描述
然后在命令行执行
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>”%VS140COMNTOOLS%vsvars32.bat”
来设置VC的命令行编译环境。
然后执行cmake来生成makefile文件
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>cmake -G “NMake Makefiles” -
DBUILD_SHARED_LIBS=OFF -DCMAKE_INSTALL_PREFIX=j:/openjpeg-windows-vc-x86 -DCMAKE
_BUILD_TYPE=RELEASE ..\openjpeg-version.2.1
– The C compiler identification is MSVC 19.0.23026.0
– Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio
14.0/VC/bin/cl.exe
– Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio
14.0/VC/bin/cl.exe – works
– Detecting C compiler ABI info
– Detecting C compiler ABI info - done
– Check if the system is big endian
– Searching 16 bit integer
– Looking for sys/types.h
– Looking for sys/types.h - found
– Looking for stdint.h
– Looking for stdint.h - found
– Looking for stddef.h
– Looking for stddef.h - found
– Check size of unsigned short
– Check size of unsigned short - done
– Using unsigned short
– Check if the system is big endian - little endian
– Looking for string.h
– Looking for string.h - found
– Looking for memory.h
– Looking for memory.h - found
– Looking for stdlib.h
– Looking for stdlib.h - found
– Looking for stdio.h
– Looking for stdio.h - found
– Looking for math.h
– Looking for math.h - found
– Looking for float.h
– Looking for float.h - found
– Looking for time.h
– Looking for time.h - found
– Looking for stdarg.h
– Looking for stdarg.h - found
– Looking for ctype.h
– Looking for ctype.h - found
– Looking for assert.h
– Looking for assert.h - found
– Looking for stdint.h
– Looking for stdint.h - found
– Looking for inttypes.h
– Looking for inttypes.h - found
– Looking for strings.h
– Looking for strings.h - not found
– Looking for sys/stat.h
– Looking for sys/stat.h - found
– Looking for unistd.h
– Looking for unistd.h - not found
– Checking for 64-bit off_t
– Checking for 64-bit off_t - not present
– Checking for fseeko/ftello
– Checking for fseeko/ftello - not found
– Large File support - not found
– Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
– Z lib not found, activate BUILD_THIRDPARTY if you want build it (necessary to build libPNG)
– Could NOT find TIFF (missing: TIFF_LIBRARY TIFF_INCLUDE_DIR)
– TIFF lib not found, activate BUILD_THIRDPARTY if you want build it
– Could NOT find LCMS2 (missing: LCMS2_LIBRARY LCMS2_INCLUDE_DIR)
– Could NOT find LCMS (missing: LCMS_LIBRARY LCMS_INCLUDE_DIR)
– LCMS2 or LCMS lib not found, activate BUILD_THIRDPARTY if you want build it
– Configuring done
– Generating done
– Build files have been written to: D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj
在上面的执行cmake创建makefile时，定义了几个参数，含义如下：
-G “NMake Makefiles”
生成NMake 格式的Makefiles ,nmake是msvc的命令行编译工具
-DBUILD_SHARED_LIBS=OFF
指定创建静态链接库.lib，默认是ON,生成dll
openjpeg提供的CMakeList.txt不能同时创建静态库和动态库，所以你既想要静态库，又想到动态库的时候，就得修改这个参数，编译两次。
当生成动态库的时候，还可以参加参数 -DCMAKE_GNUtoMS=ON 生成MSVC格式的导入库(import library .lib文件)。这样MSVC就可以直接使用GCC编译的动态库了。参见我之前的博客《cmake:让mingw(gcc)生成MSVC可用的dll(.lib)》
-DCMAKE_BUILD_TYPE=RELEASE
就是生成RELEASE，这个参数即使不定义，默认也是生成 RELEASE版本
CMAKE_INSTALL_PREFIX=j:/openjpeg-windows-vc-x86
这个参数指定在执行make install时的安装路径。如果不指定默认是安装到”C:/Program Files (x86)/OPENJPEG”。
然后执行nmake
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>nmake
Microsoft (R) 程序维护实用工具 14.00.23026.0 版
版权所有 (C) Microsoft Corporation。 保留所有权利。
Scanning dependencies of target openjp2
[ 2%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/bio.c.obj
bio.c
[ 5%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/cio.c.obj
cio.c
[ 8%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/dwt.c.obj
dwt.c
[ 11%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/event.c.obj
event.c
[ 14%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/image.c.obj
image.c
[ 17%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/invert.c.obj
invert.c
[ 20%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/j2k.c.obj
j2k.c
[ 22%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/jp2.c.obj
jp2.c
D:\os.package\cpp\openjpeg\openjpeg-version.2.1\src\lib\openjp2\jp2.c(872): warn
ing C4819: 该文件包含不能在当前代码页(936)中表示的字符。请将该文件保存为 Unicode
格式以防止数据丢失
[ 25%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mct.c.obj
mct.c
[ 28%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/mqc.c.obj
mqc.c
[ 31%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/openjpeg.c.obj
openjpeg.c
[ 34%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/opj_clock.c.obj
opj_clock.c
[ 37%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/pi.c.obj
pi.c
[ 40%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/raw.c.obj
raw.c
[ 42%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t1.c.obj
t1.c
[ 45%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/t2.c.obj
t2.c
[ 48%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tcd.c.obj
tcd.c
[ 51%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/tgt.c.obj
tgt.c
[ 54%] Building C object src/lib/openjp2/CMakeFiles/openjp2.dir/function_list.c.obj
function_list.c
Linking C static library ……\bin\openjp2.lib
[ 54%] Built target openjp2
Scanning dependencies of target t1_generate_luts
[ 57%] Building C object src/lib/openjp2/CMakeFiles/t1_generate_luts.dir/t1_generate_luts.c.obj
t1_generate_luts.c
Linking C executable ……\bin\t1_generate_luts.exe
[ 57%] Built target t1_generate_luts
Scanning dependencies of target opj_compress
[ 60%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/opj_compress.c.obj
opj_compress.c
[ 62%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/convert.c.obj
convert.c
[ 65%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/index.c.obj
index.c
[ 68%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/__/common/color.c.obj
color.c
[ 71%] Building C object src/bin/jp2/CMakeFiles/opj_compress.dir/__/common/opj_getopt.c.obj
opj_getopt.c
Linking C executable ……\bin\opj_compress.exe
[ 71%] Built target opj_compress
Scanning dependencies of target opj_decompress
[ 74%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/opj_decompress.c.obj
opj_decompress.c
[ 77%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/convert.c.obj
convert.c
[ 80%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/index.c.obj
index.c
[ 82%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/__/common/color.c.obj
color.c
[ 85%] Building C object src/bin/jp2/CMakeFiles/opj_decompress.dir/__/common/opj
_getopt.c.obj
opj_getopt.c
Linking C executable ……\bin\opj_decompress.exe
[ 85%] Built target opj_decompress
Scanning dependencies of target opj_dump
[ 88%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/opj_dump.c.obj
opj_dump.c
[ 91%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/convert.c.obj
convert.c
[ 94%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/index.c.obj
index.c
[ 97%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/__/common/color.c.obj
color.c
[100%] Building C object src/bin/jp2/CMakeFiles/opj_dump.dir/__/common/opj_getopt.c.obj
opj_getopt.c
Linking C executable ……\bin\opj_dump.exe
[100%] Built target opj_dump
然后执行nmake install
然后执行nmake install ,就会将生成的二进制文件自动复制到前面CMAKE_INSTALL_PREFIX指定的J:\openjpeg-windows-vc-x86文件夹下，分为bin\include\lib三个子目录。
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>nmake install
Microsoft (R) 程序维护实用工具 14.00.23026.0 版
版权所有 (C) Microsoft Corporation。 保留所有权利。
[ 54%] Built target openjp2
[ 57%] Built target t1_generate_luts
[ 71%] Built target opj_compress
[ 85%] Built target opj_decompress
[100%] Built target opj_dump
Install the project…
– Install configuration: “RELEASE”
– Installing: j:/openjpeg-windows-vc-x86/lib/openjpeg-2.1/OpenJPEGTargets.cmake
– Installing: j:/openjpeg-windows-vc-x86/lib/openjpeg-2.1/OpenJPEGTargets-release.cmake
– Installing: j:/openjpeg-windows-vc-x86/lib/openjpeg-2.1/OpenJPEGConfig.cmake
– Installing: j:/openjpeg-windows-vc-x86/bin/msvcp140.dll
– Installing: j:/openjpeg-windows-vc-x86/include/openjpeg-2.1/opj_config.h
– Installing: j:/openjpeg-windows-vc-x86/lib/openjp2.lib
– Installing: j:/openjpeg-windows-vc-x86/include/openjpeg-2.1/openjpeg.h
– Installing: j:/openjpeg-windows-vc-x86/include/openjpeg-2.1/opj_stdint.h
– Installing: j:/openjpeg-windows-vc-x86/bin/opj_decompress.exe
– Installing: j:/openjpeg-windows-vc-x86/bin/opj_compress.exe
– Installing: j:/openjpeg-windows-vc-x86/bin/opj_dump.exe
win 7 x64下编译64位openjpeg
上面的步骤执行下来，nmake生成的默认就是x86(32位)目标代码，因为对cmake nmake了解不够，现在还不知道如何在这个过程中指定生成64代码，所以生成64位代码我用了另外一个过程。
不要忘记了，在编译之前一定也要像上面的步骤一样，先执行”%VS140COMNTOOLS%vsvars32.bat”来设置VC的命令行编译环境哦
清理掉上面过程的文件，重新创建build文件夹（openjpeg-version.2.1.prj）
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>cd ..
D:\os.package\cpp\openjpeg>rmdir openjpeg-version.2.1.prj /s/q
D:\os.package\cpp\openjpeg>mkdir openjpeg-version.2.1.prj
D:\os.package\cpp\openjpeg>cd openjpeg-version.2.1.prj
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>
执行cmake生成VS2015 Win64格式的sln工程文件OPENJPEG.sln
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>cmake -G “Visual Studio 14 2
015 Win64” -DBUILD_SHARED_LIBS=OFF ..\openjpeg-version.2.1
– The C compiler identification is MSVC 19.0.23026.0
– Check for working C compiler using: Visual Studio 14 2015 Win64
– Check for working C compiler using: Visual Studio 14 2015 Win64 – works
– Detecting C compiler ABI info
– Detecting C compiler ABI info - done
– Check if the system is big endian
– Searching 16 bit integer
– Looking for sys/types.h
– Looking for sys/types.h - found
– Looking for stdint.h
– Looking for stdint.h - found
– Looking for stddef.h
– Looking for stddef.h - found
– Check size of unsigned short
– Check size of unsigned short - done
– Using unsigned short
– Check if the system is big endian - little endian
– Looking for string.h
– Looking for string.h - found
– Looking for memory.h
– Looking for memory.h - found
– Looking for stdlib.h
– Looking for stdlib.h - found
– Looking for stdio.h
– Looking for stdio.h - found
– Looking for math.h
– Looking for math.h - found
– Looking for float.h
– Looking for float.h - found
– Looking for time.h
– Looking for time.h - found
– Looking for stdarg.h
– Looking for stdarg.h - found
– Looking for ctype.h
– Looking for ctype.h - found
– Looking for assert.h
– Looking for assert.h - found
– Looking for stdint.h
– Looking for stdint.h - found
– Looking for inttypes.h
– Looking for inttypes.h - found
– Looking for strings.h
– Looking for strings.h - not found
– Looking for sys/stat.h
– Looking for sys/stat.h - found
– Looking for unistd.h
– Looking for unistd.h - not found
– Checking for 64-bit off_t
– Checking for 64-bit off_t - not present
– Checking for fseeko/ftello
– Checking for fseeko/ftello - not found
– Large File support - not found
– Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
– Z lib not found, activate BUILD_THIRDPARTY if you want build it (necessary to
build libPNG)
– Could NOT find TIFF (missing: TIFF_LIBRARY TIFF_INCLUDE_DIR)
– TIFF lib not found, activate BUILD_THIRDPARTY if you want build it
– Could NOT find LCMS2 (missing: LCMS2_LIBRARY LCMS2_INCLUDE_DIR)
– Could NOT find LCMS (missing: LCMS_LIBRARY LCMS_INCLUDE_DIR)
– LCMS2 or LCMS lib not found, activate BUILD_THIRDPARTY if you want build it
– Configuring done
– Generating done
– Build files have been written to: D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>
命令行调用VS2015开发环境devenv编译上面生成的工程文件OPENJPEG.sln，指定编译解决方案”Release|x64”
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>devenv OPENJPEG.sln /build ”
Release|x64”
Microsoft Visual Studio 2015 14.0.23107.0 版。
版权所有 (C) Microsoft Corp。保留所有权利。
1>—— 已启动生成: 项目: ZERO_CHECK, 配置: Release x64 ——
1> Checking Build System
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/src/lib/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/src/lib/openjp2/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/thirdparty/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/src/bin/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/src/bin/common/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-ve
rsion.2.1.prj/src/bin/jp2/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/src/bin/wx/CMakeFiles/generate.stamp is up-to-date.
1> CMake does not need to re-run because D:/os.package/cpp/openjpeg/openjpeg-version.2.1.prj/wrapping/CMakeFiles/generate.stamp is up-to-date.
2>—— 已启动生成: 项目: openjp2, 配置: Release x64 ——
3>—— 已启动生成: 项目: t1_generate_luts, 配置: Release x64 ——
2> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/src/lib
/openjp2/CMakeLists.txt
2> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\src\lib\openjp2\CMakeFiles\generate.stamp is up-to-date.
2> bio.c
2> cio.c
2> dwt.c
2> event.c
2> image.c
3> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/src/lib
/openjp2/CMakeLists.txt
2> invert.c
3> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\src\lib\openjp2\CMakeFiles\generate.stamp is up-to-date.
2> j2k.c
2> jp2.c
3> t1_generate_luts.c
2>D:\os.package\cpp\openjpeg\openjpeg-version.2.1\src\lib\openjp2\jp2.c(872): wa
rning C4819: 该文件包含不能在当前代码页(936)中表示的字符。请将该文件保存为 Unico
de 格式以防止数据丢失
2> mct.c
2> mqc.c
2> openjpeg.c
3> t1_generate_luts.vcxproj -> D:\os.package\cpp\openjpeg\openjpeg-version.2.1.
prj\bin\Release\t1_generate_luts.exe
2> opj_clock.c
2> pi.c
2> raw.c
2> t1.c
2> t2.c
2> tcd.c
2> tgt.c
2> function_list.c
2> 正在生成代码…
2> openjp2.vcxproj -> D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj\bin\R
elease\openjp2.lib
4>—— 已启动生成: 项目: opj_compress, 配置: Release x64 ——
5>—— 已启动生成: 项目: opj_decompress, 配置: Release x64 ——
6>—— 已启动生成: 项目: opj_dump, 配置: Release x64 ——
5> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/src/bin
/jp2/CMakeLists.txt
4> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/src/bin
/jp2/CMakeLists.txt
5> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\src\bin\jp2\CMakeFiles\generate.stamp is up-to-date.
4> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\src\bin\jp2\CMakeFiles\generate.stamp is up-to-date.
5> opj_decompress.c
4> opj_compress.c
6> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/src/bin
/jp2/CMakeLists.txt
6> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\src\bin\jp2\CMakeFiles\generate.stamp is up-to-date.
5> convert.c
5> index.c
4> convert.c
6> opj_dump.c
5> color.c
4> index.c
5> opj_getopt.c
4> color.c
5> 正在生成代码…
4> opj_getopt.c
4> 正在生成代码…
6> convert.c
6> index.c
6> color.c
6> opj_getopt.c
6> 正在生成代码…
5> opj_decompress.vcxproj -> D:\os.package\cpp\openjpeg\openjpeg-version.2.1.pr
j\bin\Release\opj_decompress.exe
4> opj_compress.vcxproj -> D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj\
bin\Release\opj_compress.exe
6> opj_dump.vcxproj -> D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj\bin\
Release\opj_dump.exe
7>—— 已启动生成: 项目: ALL_BUILD, 配置: Release x64 ——
7> Building Custom Rule D:/os.package/cpp/openjpeg/openjpeg-version.2.1/CMakeLi
sts.txt
7> CMake does not need to re-run because D:\os.package\cpp\openjpeg\openjpeg-ve
rsion.2.1.prj\CMakeFiles\generate.stamp is up-to-date.
8>—— 已跳过生成: 项目: INSTALL, 配置: Release x64 ——
8>没有为此解决方案配置选中要生成的项目
9>—— 已跳过生成: 项目: PACKAGE, 配置: Release x64 ——
9>没有为此解决方案配置选中要生成的项目
========== 生成: 成功 7 个，失败 0 个，最新 0 个，跳过 2 个 ==========
D:\os.package\cpp\openjpeg\openjpeg-version.2.1.prj>
编译结束，所有的目标文件都在openjpeg-version.2.1.prj/bin/Release下。使用devenv编译sln工程没有install过程，你得手工把目标文件复制到你需要的位置。
这里写图片描述
在调用cmake生成OPEN.sln时如果 BUILD_SHARED_LIBS设为ON，就会生成openjp2.dll和导入库(import library)openjp2.lib
这里写图片描述
说话，我觉得编译32位和64位目标代码要用不同的办法，还是挺麻烦的，对于cmake交叉编译，目前还没有完全搞明白，如果哪位朋友有办法，不吝赐教啊。