Merge pull request #4877 from charles-lunarg:fix_CMake_option_gtest_force_shared_crt

PiperOrigin-RevId: 953422334
Change-Id: I769777aa8b4a886638a178b4e446677711f00240
This commit is contained in:
Copybara-Service 2026-07-24 10:02:11 -07:00
commit c914e89e2a

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@ -28,15 +28,6 @@ macro(fix_default_compiler_settings_)
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO) CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt) if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
# When Google Test is built as a shared library, it should also use
# shared runtime libraries. Otherwise, it may end up with multiple
# copies of runtime library data in different modules, resulting in
# hard-to-find crashes. When it is built as a static library, it is
# preferable to use CRT as static libraries, as we don't have to rely
# on CRT DLLs being available. CMake always defaults to using shared
# CRT libraries, so we override that default here.
string(REGEX REPLACE "([/-])MD" "\\1MT" ${flag_var} "${${flag_var}}")
# When using Ninja with Clang, static builds pass -D_DLL on Windows. # When using Ninja with Clang, static builds pass -D_DLL on Windows.
# This is incorrect and should not happen, so we fix that here. # This is incorrect and should not happen, so we fix that here.
string(REGEX REPLACE "([/-])D_DLL" "" ${flag_var} "${${flag_var}}") string(REGEX REPLACE "([/-])D_DLL" "" ${flag_var} "${${flag_var}}")
@ -71,7 +62,19 @@ macro(config_compiler_and_linker)
endif() endif()
fix_default_compiler_settings_() fix_default_compiler_settings_()
if (MSVC) if (MSVC)
# When Google Test is built as a shared library, it should also use shared
# runtime libraries. Otherwise, it may end up with multiple copies of
# runtime library data in different modules, resulting in hard-to-find
# crashes. When it is built as a static library, it is preferable to use CRT
# as static libraries, as we don't have to rely on CRT DLLs being available.
# CMake always defaults to using shared CRT libraries, so we override that
# default here.
if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt AND NOT DEFINED CMAKE_MSVC_RUNTIME_LIBRARY)
set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
endif()
# Newlines inside flags variables break CMake's NMake generator. # Newlines inside flags variables break CMake's NMake generator.
# TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds. # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J") set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J")