The instructions for running CMake went back & forth between *nix, Windows and Visual Studio instructions Let's create headings and split the existing instructions up into those new sections. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> --- contrib/buildsystems/CMakeLists.txt | 68 +++++++++++++++++++++-------- 1 file changed, 50 insertions(+), 18 deletions(-) diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt index 5b22a9b217f..80290edd72a 100644 --- a/contrib/buildsystems/CMakeLists.txt +++ b/contrib/buildsystems/CMakeLists.txt @@ -4,7 +4,31 @@ #[[ -Instructions how to use this in Visual Studio: +== Overview == + +The top-level Makefile is Git's primary build environment, and a lot +of things are missing (and probably always will be) from this CMake +alternative. + +The primary use-case for maintaining this CMake build recipe is to +have nicer IDE integration on Windows. + +== Creating a build recipe == + +The "cmake" command creates a build file from this recipe: + + cmake -S contrib/buildsystems -B contrib/buildsystems/out -DCMAKE_BUILD_TYPE=Release + +Running this will create files in the contrib/buildsystems/out +directory (our top-level .gitignore file knows to ignore contents of +this directory). + +See "cmake options" below for a discussion of +"-DCMAKE_BUILD_TYPE=Release" and other options to "cmake". + +== Building with Visual Visual Studio == + +To use this in Visual Studio: Open the worktree as a folder. Visual Studio 2019 and later will detect the CMake configuration automatically and set everything up for you, @@ -14,13 +38,33 @@ Note: Visual Studio also has the option of opening `CMakeLists.txt` directly; Using this option, Visual Studio will not find the source code, though, therefore the `File>Open>Folder...` option is preferred. -Instructions to run CMake manually: +By default CMake will install vcpkg locally to your source tree on configuration, +to avoid this, add `-DNO_VCPKG=TRUE` to the command line when configuring. - cmake -S contrib/buildsystems -B contrib/buildsystems/out -DCMAKE_BUILD_TYPE=Release +== Building on Windows without Visual Studio == -This will build the git binaries in contrib/buildsystems/out -directory (our top-level .gitignore file knows to ignore contents of -this directory). +Open contrib/buildsystems/git.sln and build Git. Or use the "msbuild" +command-line tool (see our own ".github/workflows/main.yml" for a real +example): + + msbuild git.sln + +== Building on *nix == + +On all other platforms running "cmake" will generate a Makefile; to +build with it run: + + make -C contrib/buildsystems/out + +It's also possible to use other generators, e.g. Ninja has arguably +slightly better output. Add "-G Ninja" to the cmake command above, +then: + + ninja -C contrib/buildsystems/out + +== cmake options == + +=== -DCMAKE_BUILD_TYPE=<type> === Possible build configurations(-DCMAKE_BUILD_TYPE) with corresponding compiler flags @@ -32,18 +76,6 @@ empty(default) : NOTE: -DCMAKE_BUILD_TYPE is optional. For multi-config generators like Visual Studio this option is ignored - -This process generates a Makefile(Linux/*BSD/MacOS) , Visual Studio solution(Windows) by default. -Run `make -C contrib/buildsystems/out` to build Git on Linux/*BSD/MacOS. -Open contrib/buildsystems/git.sln on Windows and build Git. - -NOTE: By default CMake uses Makefile as the build tool on Linux and Visual Studio in Windows, -to use another tool say `ninja` add this to the command line when configuring. -`-G Ninja` - -NOTE: By default CMake will install vcpkg locally to your source tree on configuration, -to avoid this, add `-DNO_VCPKG=TRUE` to the command line when configuring. - ]] cmake_minimum_required(VERSION 3.14) -- 2.39.0.rc1.1006.gb4c675778ba
