Accept multiple paths for the INCLUDE_PATH option

[tyamaguchi-ucla]

textshaping/configure

Lines 30 to 31 in 62c8e3a

	echo "Found INCLUDE_DIR and/or LIB_DIR!"
	PKG_CFLAGS="-I$INCLUDE_DIR $PKG_CFLAGS"

It would be easier to install this package if the config could accept multiple paths via INCLUDE_PATH=$PATH1:$PATH2:$PATH3, then split by : and then pass the paths to the -I option.

[thomasp85]

I think you'd be better off relying on pkg-config to populate the flags

I don't plan to add something like this at least