src/check-symbols.sh

#!/bin/sh

LC_ALL=C
export LC_ALL

test -z "$srcdir" && srcdir=.
test -z "$libs" && libs=.libs
stat=0


if which nm 2>/dev/null >/dev/null; then
	:
else
	echo "check-symbols.sh: 'nm' not found; skipping test"
	exit 77
fi

echo "Checking that we are not exposing internal symbols"
tested=false
for soname in harfbuzz harfbuzz-subset harfbuzz-icu harfbuzz-gobject; do
	for suffix in so dylib; do
		so=$libs/lib$soname.$suffix
		if ! test -f "$so"; then continue; fi

		EXPORTED_SYMBOLS="`nm "$so" | grep ' [BCDGINRSTVW] .' | grep -v ' _fini\>\| _init\>\| _fdata\>\| _ftext\>\| _fbss\>\| __bss_start\>\| __bss_start__\>\| __bss_end__\>\| _edata\>\| _end\>\| _bss_end__\>\| __end__\>\| __gcov_flush\>\| ___gcov_flush\>\| llvm_\| _llvm_' | cut -d' ' -f3`"

		prefix=`basename "$so" | sed 's/libharfbuzz/hb/; s/-/_/g; s/[.].*//'`

		# On macOS, C symbols are prefixed with _
		if test $suffix = dylib; then prefix="_$prefix"; fi

		echo "Processing $so"
		if echo "$EXPORTED_SYMBOLS" | grep -v "^${prefix}\(_\|$\)"; then
			echo "Ouch, internal symbols exposed"
			stat=1
		fi

		tested=true
	done
done
if ! $tested; then
	echo "check-symbols.sh: no shared library found; skipping test"
	exit 77
fi

exit $stat