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CMake: Keep compatible with Windows 95 for 32-bit build.

This commit is contained in:
huangqinjin 2021-12-13 20:49:21 +08:00 committed by Lasse Collin
parent 2024fbf279
commit 2bd36c91d0
1 changed files with 11 additions and 1 deletions
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12
CMakeLists.txt
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@ -164,7 +164,17 @@ endif()
set(THREADS_PREFER_PTHREAD_FLAG TRUE)
find_package(Threads REQUIRED)
if(CMAKE_USE_WIN32_THREADS_INIT)
add_compile_definitions(MYTHREAD_VISTA)
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
# Define to 1 when using Windows 95 (and thus XP) compatible threads. This
# avoids use of features that were added in Windows Vista.
# This is used for 32-bit x86 builds for compatibility reasons since it
# makes no measurable difference in performance compared to Vista threads.
add_compile_definitions(MYTHREAD_WIN95)
else()
# Define to 1 when using Windows Vista compatible threads. This uses features
# that are not available on Windows XP.
add_compile_definitions(MYTHREAD_VISTA)
endif()
else()
add_compile_definitions(MYTHREAD_POSIX)