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Fix for universal binaries on macOS

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Fix the issue of a
    clang: error: no such file or directory: 'x86_64'
error on building universal binaries on macOS.

It is also necessary to specify:
    -DCMAKE_C_FLAGS="-DPNG_ARM_NEON_OPT=0"

Example CMake command:
    cmake -S libpng \
          -B build_libpng \
          -DCMAKE_OSX_ARCHITECTURES="arm64;x86_64" \
          -DCMAKE_C_FLAGS="-DPNG_ARM_NEON_OPT=0"

Signed-off-by: Cosmin Truta <ctruta@gmail.com>
This commit is contained in:
Jon Creighton
2023-01-09 13:17:31 +00:00
committed by Cosmin Truta
parent 9923515ff4
commit cd0ea2a7f5
2 changed files with 5 additions and 4 deletions
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6
scripts/genout.cmake.in
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@@ -24,10 +24,10 @@ set(ZLIBINCDIR "@ZLIB_INCLUDE_DIRS@")
set(PLATFORM_C_FLAGS)
if(APPLE)
set(CMAKE_OSX_ARCHITECTURES "@CMAKE_OSX_ARCHITECTURES@")
set(CMAKE_OSX_INTERNAL_ARCHITECTURES "@CMAKE_OSX_INTERNAL_ARCHITECTURES@")
set(CMAKE_OSX_SYSROOT "@CMAKE_OSX_SYSROOT@")
if(CMAKE_OSX_ARCHITECTURES)
set(PLATFORM_C_FLAGS ${PLATFORM_C_FLAGS} -arch ${CMAKE_OSX_ARCHITECTURES})
if(CMAKE_OSX_INTERNAL_ARCHITECTURES)
set(PLATFORM_C_FLAGS ${PLATFORM_C_FLAGS} -arch ${CMAKE_OSX_INTERNAL_ARCHITECTURES})
endif()
if(CMAKE_OSX_SYSROOT)
set(PLATFORM_C_FLAGS ${PLATFORM_C_FLAGS} -isysroot ${CMAKE_OSX_SYSROOT})