m4macros: Set a serial number

When a project has a bundled copy of our macro included in tarball
source releases, typically in a m4/ or aclocal/ directory, aclocal
uses the serial number to determine whether the system copy in
/usr/share/aclocal is newer or older than the bundled copy. Without
a serial number, the bundled copy will always be used and will not
be overwritten, even if it is outdated.

Signed-off-by: Simon McVittie <smcv@debian.org>
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895018
Forwarded: https://gitlab.gnome.org/GNOME/gtk/merge_requests/103
Applied-upstream: 3.22.31, commit:16a6c39a9bbb0f3fa209662776f2b74e7175a4b8

Gbp-Pq: Name m4macros-Set-a-serial-number.patch

diff --git a/m4macros/gtk-3.0.m4 b/m4macros/gtk-3.0.m4
index 799c7be6e6cba29337ed3176776c0825b96cf9a7..983913ab3a1e47c5f945282a1156c5fbb2428bd0 100644 (file)
--- a/m4macros/gtk-3.0.m4
+++ b/m4macros/gtk-3.0.m4
@@ -1,6 +1,10 @@
 # Configure paths for GTK+
 # Owen Taylor     1997-2001
 
+# Version number used by aclocal, see `info automake Serials`.
+# Increment on every change.
+#serial 1
+
 dnl AM_PATH_GTK_3_0([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, MODULES]]]])
 dnl Test for GTK+, and define GTK_CFLAGS and GTK_LIBS, if gthread is specified in MODULES, 
 dnl pass to pkg-config