Add check for not linking to libstdc++

TODO

@@ -1,6 +1,5 @@
 - cmap14 support in get_glyph callback
-- size_t?
-- Add test for linking to libstdc++
+- Use size_t in sanitize?
 - Move unicode_funcs to buffer
 
 hb-ot:

src/Makefile.am

@@ -62,4 +62,8 @@ main_SOURCES = main.cc
 main_CPPFLAGS = $(GLIB_CFLAGS)
 main_LDADD = libharfbuzz.la $(GLIB_LIBS)
 
+TESTS = \
+	check-libstdc++.sh \
+	$(NULL)
+
 -include $(top_srcdir)/git.mk

src/check-libstdc++.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+LC_ALL=C
+export LC_ALL
+
+if which ldd 2>/dev/null >/dev/null; then
+	:
+else
+	echo "check-libstdc++.sh: 'ldd' not found; skipping test"
+	exit 0
+fi
+
+test -z "$srcdir" && srcdir=.
+test -z "$MAKE" && MAKE=make
+stat=0
+
+so=.libs/libharfbuzz.so
+if test -f "$so"; then
+	echo "Checking that we are not linking to libstdc++"
+	if ldd $so | grep 'libstdc[+][+]'; then
+		echo "Ouch, linked to libstdc++"
+		stat=1
+	fi
+else
+	echo "check-libstdc++.sh: libharfbuzz.so not found; skipping test"
+fi
+
+exit $stat