need to instal gpac for this to work

[divyamML]

xcrun -sdk iphoneos clang conftest.c -Wall -I. -I$(SRCPATH) -arch arm64 -fembed-bitcode -mios-version-min=7.0 -std=gnu99 -lgpac_static -lz -arch arm64 -fembed-bitcode -mios-version-min=7.0 -lm -lpthread -o conftest
conftest.c:1:10: fatal error: 'gpac/isomedia.h' file not found

include <gpac/isomedia.h>

     ^

1 error generated.