Add check-exported-symbols.sh

And misc linking fixes.

src/Makefile.am

@@ -241,6 +241,7 @@ test_would_substitute_LDADD = libharfbuzz.la $(HBLIBS) $(FREETYPE_LIBS)
 dist_check_SCRIPTS = \
 	check-c-linkage-decls.sh \
 	check-header-guards.sh \
+	check-exported-symbols.sh \
 	check-includes.sh \
 	check-internal-symbols.sh \
 	check-static-inits.sh \

src/check-exported-symbols.sh

+#!/bin/sh
+
+LC_ALL=C
+export LC_ALL
+
+test -z "$srcdir" && srcdir=.
+test -z "$MAKE" && MAKE=make
+stat=0
+
+if which nm 2>/dev/null >/dev/null; then
+	:
+else
+	echo "check-exported-symbols.sh: 'nm' not found; skipping test"
+	exit 77
+fi
+
+defs="harfbuzz.def"
+$MAKE $defs > /dev/null
+tested=false
+for def in $defs; do
+	lib=`echo "$def" | sed 's/[.]def$//;s@.*/@@'`
+	so=.libs/lib${lib}.so
+	if test -f "$so"; then
+		echo "Checking that $so has the same symbol list as $def"
+		{
+			echo EXPORTS
+			nm "$so" | grep ' [BCDGINRSTVW] ' | grep -v ' T _fini\>\| T _init\>' | cut -d' ' -f3
+			stat=1
+			# cheat: copy the last line from the def file!
+			tail -n1 "$def"
+		} | diff "$def" - >&2 || stat=1
+		tested=true
+	fi
+done
+if ! $tested; then
+	echo "check-exported-symbols.sh: libharfbuzz shared library not found; skipping test"
+	exit 77
+fi
+
+exit $stat

src/check-internal-symbols.sh

@@ -19,7 +19,7 @@ for suffix in .so; do
 	so=`echo .libs/libharfbuzz$suffix`
 	if test -f "$so"; then
 		echo "Checking that we are not exposing internal symbols"
-		if nm $so | grep ' [TW] ' | grep -v ' T _fini\>\| T _init\>\| T hb_'; then
+		if nm "$so" | grep ' [BCDGINRSTVW] ' | grep -v ' T _fini\>\| T _init\>\| T hb_'; then
 			echo "Ouch, internal symbols exposed"
 			stat=1
 		fi

src/hb-ot-shape-complex-indic.cc

@@ -57,7 +57,7 @@ indic_options_init (void)
   return u;
 }
 
-inline indic_options_t
+static inline indic_options_t
 indic_options (void)
 {
   static indic_options_union_t options;

src/hb-ot-shape.cc

@@ -40,7 +40,7 @@
 #include "hb-set-private.hh"
 
 
-hb_tag_t common_features[] = {
+static hb_tag_t common_features[] = {
   HB_TAG('c','c','m','p'),
   HB_TAG('l','i','g','a'),
   HB_TAG('l','o','c','l'),
@@ -50,7 +50,7 @@ hb_tag_t common_features[] = {
 };
 
 
-hb_tag_t horizontal_features[] = {
+static hb_tag_t horizontal_features[] = {
   HB_TAG('c','a','l','t'),
   HB_TAG('c','l','i','g'),
   HB_TAG('c','u','r','s'),
@@ -63,7 +63,7 @@ hb_tag_t horizontal_features[] = {
  * According to the spec, valt and vpal are also mutually exclusive.
  * But we apply them all for now.
  */
-hb_tag_t vertical_features[] = {
+static hb_tag_t vertical_features[] = {
   HB_TAG('v','a','l','t'),
   HB_TAG('v','e','r','t'),
   HB_TAG('v','k','r','n'),