From 708ab2b9e425ff48d338dee1cde3a148348bff19 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Tue, 16 Nov 2021 17:45:18 +0100 Subject: [PATCH] cmake: optionally build `scalar`, too Unlike the `Makefile`-based build, the CMake configuration unfortunately does not let us easily encapsulate Scalar's build definition in the `contrib/scalar/` subdirectory: The `scalar` executable needs to link in `libgit.a` and `common-main.o`, for example. Also, `scalar.c` includes Git's header files, which means that `scalar.c` needs to be compiled with the very same flags as `libgit.a` lest `scalar.o` and `libgit.a` have different ideas of, say, `platform_SHA_CTX`, which would naturally lead to memory corruption, crashes and quite tricky debugging (talking from experience). To alleviate that lack of encapsulation somewhat, we guard the Scalar parts in `CMakeLists.txt` via the `INCLUDE_SCALAR` environment variable. This not only allows the CMake-based build to exclude Scalar by default, but also gives better visual cues as to which sections are related to Scalar. Signed-off-by: Johannes Schindelin --- contrib/buildsystems/CMakeLists.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt index 199410c4ac24d0..d1b0fdf94a3348 100644 --- a/contrib/buildsystems/CMakeLists.txt +++ b/contrib/buildsystems/CMakeLists.txt @@ -810,6 +810,13 @@ if(CURL_FOUND) endif() endif() +if(DEFINED ENV{INCLUDE_SCALAR} AND NOT ENV{INCLUDE_SCALAR} STREQUAL "") + add_executable(scalar ${CMAKE_SOURCE_DIR}/contrib/scalar/scalar.c) + target_link_libraries(scalar common-main) + set_target_properties(scalar PROPERTIES RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR}/contrib/scalar) + set_target_properties(scalar PROPERTIES RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR}/contrib/scalar) +endif() + parse_makefile_for_executables(git_builtin_extra "BUILT_INS") option(SKIP_DASHED_BUILT_INS "Skip hardlinking the dashed versions of the built-ins") @@ -1037,6 +1044,13 @@ string(REPLACE "@@BUILD_DIR@@" "${CMAKE_BINARY_DIR}" content "${content}") string(REPLACE "@@PROG@@" "git-cvsserver" content "${content}") file(WRITE ${CMAKE_BINARY_DIR}/bin-wrappers/git-cvsserver ${content}) +if(DEFINED ENV{INCLUDE_SCALAR} AND NOT ENV{INCLUDE_SCALAR} STREQUAL "") + file(STRINGS ${CMAKE_SOURCE_DIR}/wrap-for-bin.sh content NEWLINE_CONSUME) + string(REPLACE "@@BUILD_DIR@@" "${CMAKE_BINARY_DIR}" content "${content}") + string(REPLACE "@@PROG@@" "contrib/scalar/scalar${EXE_EXTENSION}" content "${content}") + file(WRITE ${CMAKE_BINARY_DIR}/bin-wrappers/scalar ${content}) +endif() + #options for configuring test options option(PERL_TESTS "Perform tests that use perl" ON) option(PYTHON_TESTS "Perform tests that use python" ON)