add simple symbols leak checker

This patch adds simple script that compares libinput.sym file to the
functions that are marked by LIBINPUT_EXPORT. This script is added
to make check target.

Signed-off-by: Marek Chalupa <mchqwerty@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

.gitignore

@@ -27,4 +27,5 @@ doc/libinput.doxygen
 doc/html
 tags
 test/test-*
+test/symbols-leak-test*
 test-driver

configure.ac

@@ -164,6 +164,9 @@ AC_CONFIG_FILES([Makefile
 		 src/libinput-version.h
 		 test/Makefile
 		 tools/Makefile])
+AC_CONFIG_FILES([test/symbols-leak-test],
+		[chmod +x test/symbols-leak-test])
+
 AC_OUTPUT
 
 AC_MSG_RESULT([

test/Makefile.am

@@ -50,7 +50,8 @@ build_tests = \
 	test-build-std-gnuc90
 
 noinst_PROGRAMS = $(build_tests) $(run_tests)
-TESTS = $(run_tests)
+noinst_SCRIPTS = symbols-leak-test
+TESTS = $(run_tests) symbols-leak-test
 
 .NOTPARALLEL:
 

test/symbols-leak-test.in

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+### simple check for exported symbols
+
+# make bash exit if any command will exit with non-0 return value
+set -e
+
+# make sure the paths are alright
+cd `dirname $0`
+
+diff -a -u \
+	<(cat @top_srcdir@/src/libinput.sym | \
+		grep '^\s\+libinput_.*' | \
+		sed -e 's/^\s\+\(.*\);/\1/' |  sort) \
+	<(cat @top_srcdir@/src/*.c | \
+		grep LIBINPUT_EXPORT -A 1 | grep '^libinput_.*' | \
+		sed -e 's/(.*//' | sort)