test: add a test that all symbol version file is updated

It is easy to forget to update these files when adding new symbols.

Stolen with slight changes from libinput (commit by Marek Chalupa):
https://cgit.freedesktop.org/wayland/libinput/commit/?id=a9f216ab47ea2f643f20ed741b741a2b5766eba3

Signed-off-by: Ran Benita <ran234@gmail.com>

Makefile.am

@@ -15,7 +15,8 @@ EXTRA_DIST = \
 	doc/doxygen-extra.css \
 	xkbcommon.map \
 	xkbcommon-x11.map \
-	PACKAGING
+	PACKAGING \
+	test/symbols-leak-test.bash
 
 AM_CPPFLAGS = \
 	-DDFLT_XKB_CONFIG_ROOT='"$(XKBCONFIGROOT)"' \
@@ -181,7 +182,8 @@ libtest_la_SOURCES = \
 AM_TESTS_ENVIRONMENT = \
 	XKB_LOG_LEVEL=debug; export XKB_LOG_LEVEL; \
 	XKB_LOG_VERBOSITY=10; export XKB_LOG_VERBOSITY; \
-	$(XORG_MALLOC_DEBUG_ENV)
+	$(XORG_MALLOC_DEBUG_ENV) \
+	top_srcdir=$(top_srcdir)
 
 build_run_tests = \
 	test/keysym \
@@ -201,6 +203,8 @@ build_run_tests = \
 build_only_tests = \
 	test/rmlvo-to-kccgst \
 	test/print-compiled-keymap
+run_only_tests = \
+	test/symbols-leak-test.bash
 
 TESTS_LDADD = libtest.la
 
@@ -248,7 +252,7 @@ test_interactive_x11_CFLAGS = $(TESTS_X11_CFLAGS)
 endif ENABLE_X11
 
 check_PROGRAMS = $(build_run_tests) $(build_only_tests)
-TESTS = $(build_run_tests)
+TESTS = $(build_run_tests) $(run_only_tests)
 
 ##
 # Benchmarks

test/symbols-leak-test.bash

@@ -0,0 +1,24 @@
+#!/bin/bash
+set -e
+
+# Check that all exported symbols are specified in the symbol
+# version scripts.  If this fails, please update the appropriate
+# (adding new version nodes when needed).
+
+# xkbcommon symbols
+diff -a -u \
+    <(cat "$top_srcdir"/xkbcommon.map | \
+        grep '^\s\+xkb_.*' | \
+        sed -e 's/^\s\+\(.*\);/\1/' | sort) \
+    <(cat "$top_srcdir"/src/{,xkbcomp,compose}/*.c | \
+        grep XKB_EXPORT -A 1 | grep '^xkb_.*' | \
+        sed -e 's/(.*//' | sort)
+
+# xkbcommon-x11 symbols
+diff -a -u \
+    <(cat "$top_srcdir"/xkbcommon-x11.map | \
+        grep '^\s\+xkb_.*' | \
+        sed -e 's/^\s\+\(.*\);/\1/' | sort) \
+    <(cat "$top_srcdir"/src/x11/*.c | \
+        grep XKB_EXPORT -A 1 | grep '^xkb_.*' | \
+        sed -e 's/(.*//' | sort)