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Split the main CMake file.

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This will well isolate contributions for original code,
generated code and SIMD (especially for Android).

Change-Id: Ie47664decc7f43c2f57260a72cab951c347281a7
This commit is contained in:
Vincent Rabaud
2016-07-07 20:21:51 +02:00
parent bbb6ecd9b0
commit 6c62841076
3 changed files with 205 additions and 204 deletions
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63
cmake/cpu.cmake Normal file
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@ -0,0 +1,63 @@
## Check for SIMD extensions.
set(WEBP_SIMD_FLAGS "SSE2;SSE41;AVX2")
set(WEBP_SIMD_FILE_EXTENSIONS "_sse2.c;_sse41.c;_avx2.c")
if(MSVC)
# MSVC does not have a SSE4 flag but AVX2 support implies
# SSE4 support.
set(SIMD_ENABLE_FLAGS "/arch:SSE2;/arch:AVX2;/arch:AVX2")
set(SIMD_DISABLE_FLAGS)
else()
set(SIMD_ENABLE_FLAGS "-msse2;-msse4.1;-mavx2")
set(SIMD_DISABLE_FLAGS "-mno-sse2;-mno-sse4.1;-mno-avx2")
endif()
set(WEBP_SIMD_FILES_TO_NOT_INCLUDE)
set(WEBP_SIMD_FILES_TO_INCLUDE)
set(WEBP_SIMD_FLAGS_TO_INCLUDE)
list(LENGTH WEBP_SIMD_FLAGS WEBP_SIMD_FLAGS_LENGTH)
math(EXPR WEBP_SIMD_FLAGS_RANGE "${WEBP_SIMD_FLAGS_LENGTH} - 1")
foreach(I_SIMD RANGE ${WEBP_SIMD_FLAGS_RANGE})
list(GET WEBP_SIMD_FLAGS ${I_SIMD} WEBP_SIMD_FLAG)
list(GET SIMD_ENABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
set(CMAKE_REQUIRED_FLAGS ${SIMD_COMPILE_FLAG})
check_c_source_compiles("
#include \"${CMAKE_CURRENT_LIST_DIR}/../src/dsp/dsp.h\"
int main(void) {
#if !defined(WEBP_USE_${WEBP_SIMD_FLAG})
this is not valid code
#endif
return 0;
}
"
WEBP_HAVE_${WEBP_SIMD_FLAG}
)
# Check which files we should include or not.
list(GET WEBP_SIMD_FILE_EXTENSIONS ${I_SIMD} WEBP_SIMD_FILE_EXTENSION)
file(GLOB SIMD_FILES "${CMAKE_CURRENT_LIST_DIR}/../"
"src/dsp/*${WEBP_SIMD_FILE_EXTENSION}"
)
if(WEBP_HAVE_${WEBP_SIMD_FLAG})
# Memorize the file and flags.
foreach(FILE ${SIMD_FILES})
list(APPEND WEBP_SIMD_FILES_TO_INCLUDE ${FILE})
list(APPEND WEBP_SIMD_FLAGS_TO_INCLUDE ${SIMD_COMPILE_FLAG})
endforeach()
else()
# Remove the file from the list.
foreach(FILE ${SIMD_FILES})
list(APPEND WEBP_SIMD_FILES_NOT_TO_INCLUDE ${FILE})
endforeach()
# Explicitly disable SIMD.
if(SIMD_DISABLE_FLAGS)
list(GET SIMD_DISABLE_FLAGS ${I_SIMD} SIMD_COMPILE_FLAG)
include(CheckCCompilerFlag)
check_c_compiler_flag(${SIMD_COMPILE_FLAG} HAS_COMPILE_FLAG)
if(HAS_COMPILE_FLAG)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SIMD_COMPILE_FLAG}")
endif()
endif()
endif()
endforeach()