Require gettext >= 0.18.3; remove GP_GETTEXT_HACK

This requires gettext version 0.18.3 or later, and it removes
the GP_GETTEXT_HACK which used to generate a po/Makevars file
from the po/Makevers.template.

gettext 0.18.3 is the same gettext version requirement
as libexif uses.

gettext 0.18.3 has been released 2013-07-07, which is
a similar timeframe of the autoconf, automake and libtool
releases we require.

If you ever need to build a post 2021 libgphoto2 from
git on a system with pre 0.18.3 gettext, you can can
always prepare a tarball using "make dist" on a system
with gettext 0.18.3 or later, and build that tarball
on the older machine.

Not generating the po/Makevars file any more means that
we need additional consistency checks for the parts of
po/Makevars which cannot be derived from the Autoconf
standard set of AC_SUBST()ed Makefile.in variables.

1 files changed, 10 insertions, 0 deletions

diff --git a/Makefile.am b/Makefile.am
index 52050e2c5..322491115 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -103,6 +103,16 @@ git-checkout-po:
 update-po:
 	@for d in $(PO_SUBDIRS); do (cd "$$d" && $(MAKE) $(AM_MAKEFLAGS) update-po)  || exit 1; done
 
+@GP_GETTEXT_SETUP_MK@
+
+# Dummy target to force Automake to make the all target depend on it
+all-local:
+	@:
+
+# Dummy target to force Automake to make the distclean target depend on it
+distclean-local:
+	@:
+
 
 ########################################################################
 # The following default options for aclocal and automake