Remove the inclusion of the external module `CMakeParseArguments`.
Function argument parsing became a first-class feature in CMake 3.5.
Delete the function `find_symbol_prefix`. It is no longer used.
Use variables instead of strings in string operations where possible.
Prevent CMake from getting confused by string values that might be
accidentally identical to unrelated keywords.
Clean up spurious `.*` sequences in regex matching operations.
Rephrase a comment.
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>
Without these flags pnglibconf.c compilation fails because it
includes zlib.h -> zconf.h -> sys/types.h which is not found until we
give a correct SDK path with -isysroot flag.
Without this patch, CMAKE_C_FLAGS will be processed as a
string/filename on MSVC (e.g. when CMAKE_C_FLAGS is equal
to " /D_WIN32 /D_WINDOWS /W3") and the whole compilation fails.
