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diff --git a/windows/INSTALL-MinGW-w64_with_CMake.txt b/windows/INSTALL-MinGW-w64_with_CMake.txt new file mode 100644 index 0000000..5d2be5b --- /dev/null +++ b/windows/INSTALL-MinGW-w64_with_CMake.txt @@ -0,0 +1,203 @@ + +Building XZ Utils on Windows using MinGW-w64 and CMake +====================================================== + + 1. Introduction + 1.1. Licensing considerations + 2. MSVCRT or UCRT + 3. CMake + 4. MinGW-w64 toolchains + 4.1. MinGW-w64 with GCC + 4.2. MinGW-w64 with Clang/LLVM + 5. Building XZ Utils + 5.1. Advanced build options + 6. Creating an import library for MSVC / Visual Studio + + +1. Introduction +--------------- + + This document explains how to build XZ Utils using MinGW-w64, + GCC or Clang/LLVM, CMake, and GNU make (mingw32-make) natively + on Windows. The resulting XZ Utils library and executable files + will only depend on DLLs that are included in Windows. + + The build tools can be extracted into separate directories and used + directly from there and deleted when no longer needed. There are no + installers to run for these and no configuration needed. + + These instructions don't apply to Cygwin. XZ Utils can be built + under Cygwin in the same way as many other packages. + + +1.1. Licensing considerations + + Parts of MinGW-w64 runtime are statically linked into the binaries + being built. The file COPYING.MinGW-w64-runtime.txt in MinGW-w64 + contains the license notices that apply to some parts of the + runtime. The notices must be distributed alongside the binaries + that have been built with MinGW-w64. + + MinGW-w64 includes getopt_long(). The GNU getopt_long() (LGPLv2.1) + included in XZ Utils isn't used when building with MinGW-w64. + + The code from XZ Utils that ends up liblzma.dll and the *.exe files + is under the BSD Zero Clause License (0BSD) which doesn't require + any copyright or license notices to be included when distributing + the binaries. See the file COPYING in the parent directory. + + +2. MSVCRT or UCRT +----------------- + + Both GCC and Clang/LLVM based MinGW-w64 toolchains come in MSVCRT + and Universal C runtime (UCRT) variants. MSVCRT is the old one. + 32-bit builds of XZ Utils with MSVCRT should run on Windows 2000 + and later (even Windows 95 should still be possible with trivial + edits to the source code). + + UCRT is included in Windows 10, and it's possible to install UCRT + on Windows XP and later. UCRT might be the preferred choice if + out-of-the-box compatibility with Windows versions older than 10 + is not required. Visual Studio 2015 and later produce binaries + that use UCRT. + + If you want to build liblzma.dll for use with your application, + it's recommended to use the same CRT for all components. If this + isn't possible, see the file liblzma-crt-mixing.txt. + + If you only need the command line tools, the choice of CRT isn't + important, at least for now. + + +3. CMake +-------- + + CMake is used for selecting build options and generating makefiles. + It can also be used to extract archives, including .tar.xz and .7z. + + Download a CMake binary package (.zip) from its homepage: + + https://cmake.org/download/ + + Extract it to, for example, C:\devel\cmake so that the executables + end up in C:\devel\cmake\bin. Avoid spaces and other special + characters in the path. + + +4. MinGW-w64 toolchains +----------------------- + + There are a few choices of prebuilt toolchains listed on + the MinGW-w64 homepage: + + https://www.mingw-w64.org/downloads/ + + These instructions list one GCC-based version and one + Clang/LLVM-based version. Both include mingw32-make too. + + +4.1. MinGW-w64 with GCC + + For GCC, download appropriate packages from Mingw-builds depending + on if you want to build 32-bit or 64-bit x86 version of XZ Utils + and if the XZ Utils binaries should link against MSVCRT or UCRT: + + https://github.com/niXman/mingw-builds-binaries/releases + + i686-*-release-win32-*-msvcrt-*.7z 32-bit, uses MSVCRT (old) + i686-*-release-win32-*-ucrt-*.7z 32-bit, uses UCRT (new) + x86_64-*-release-win32-*-msvcrt-*.7z 64-bit, uses MSVCRT (old) + x86_64-*-release-win32-*-ucrt-*.7z 64-bit, uses UCRT (new) + + Extract it, for example, to C:\devel so that the executables are + in C:\devel\mingw32\bin or C:\devel\mingw64\bin. To extract, + you can install 7-Zip from <https://7-zip.org/> or use CMake + on the command line: + + set PATH=C:\devel\cmake\bin;%PATH% + c: + cd \devel + cmake -E tar xf x86_64-13.1.0-release-win32-seh-ucrt-rt_v11-rev1.7z + + Then skip to the section "Building XZ Utils". + + +4.2. MinGW-w64 with Clang/LLVM + + For Clang/LLVM, download an appropriate package from LLVM-MinGW: + + https://github.com/mstorsjo/llvm-mingw/releases + + llvm-mingw-*-msvcrt-i686.zip 32-bit, uses MSVCRT (old) + llvm-mingw-*-ucrt-i686.zip 32-bit, uses UCRT (new) + llvm-mingw-*-msvcrt-x86_64.zip 64-bit, uses MSVCRT (old) + llvm-mingw-*-ucrt-x86_64.zip 64-bit, uses UCRT (new) + + Extract it, for example, to C:\devel so that the executables end up + in a directory like C:\devel\llvm-mingw-20230919-ucrt-x86_64\bin. + + +5. Building XZ Utils +-------------------- + + For a simple builds, you can use the included build-with-cmake.bat + which takes these arguments: + + %1 = Path to CMake's bin directory. Example: + c:\devel\cmake\bin + + %2 = Path to MinGW-w64's bin directory. Example: + c:\devel\mingw64\bin + + %3 = ON or OFF: Set to ON to build liblzma.dll or OFF for + static liblzma.a. With OFF, the *.exe files won't + depend on liblzma.dll. + + Example: + + build-with-cmake C:\devel\cmake\bin C:\devel\mingw64\bin ON + + If successful, the "build" directory should then contain: + + liblzma.dll liblzma compression library + liblzma.def DEF file for creating an import library + xz.exe xz command line tool + xzdec.exe Decompression-only tool (smaller than xz.exe) + lzmadec.exe Decompression-only tool for legacy .lzma files + lzmainfo.exe Shows header info of legacy .lzma files + + Ignore the other files. :-) + + +5.1. Advanced build options + + For 32-bit x86 builds, adding -msse2 to CFLAGS improves + compression speed a little (but not decompression speed). + There is no runtime detection for SSE2 support. It is + recommended to use 64-bit version when possible. + + It's possible to omit features from the build to reduce code size. + There are several CMake configuration options available. One may + change from CMAKE_BUILD_TYPE=Release to =MinSizeRel as well but + it makes the code slower. + + If building for multiple targets, keep only one toolchain in PATH + at a time. + + +6. Creating an import library for MSVC / Visual Studio +------------------------------------------------------ + + To link against liblzma.dll, you need to create an import library + first. You need the "lib" command from MSVC and liblzma.def. Here + is the command that works on 32-bit x86: + + lib /def:liblzma.def /out:liblzma.lib /machine:ix86 + + On x86-64, the /machine argument has to be changed: + + lib /def:liblzma.def /out:liblzma.lib /machine:x64 + + IMPORTANT: See also the file liblzma-crt-mixing.txt. + |