Fix for universal binaries on macOS 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>