[geocode-glib] build: Use a minimum gettext requirement rather than an exact one

[Philip Withnall <pwithnall src gnome org>]

commit 6ba0e38fd1987be0de8432afd93b9a5c1f487b63
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Jan 18 14:05:15 2017 +0000

    build: Use a minimum gettext requirement rather than an exact one
    
    In configure.ac, specify the minimum gettext version we require, rather
    than the exact one. This fixes a situation where the autoconf macros
    used for gettext will be the latest available on the system (for
    example, 0.19); but the copied-in Makefile.in.in will be for the exact
    version specified in configure.ac (in this case, 0.18).
    
    In that situation, the gettext build rules will error out at `make` time
    with the message:
       *** error: gettext infrastructure mismatch: using a Makefile.in.in
       from gettext version 0.18 but the autoconf macros are from gettext
       version 0.19
    
    Avoid that by specifying a minimum version dependency rather than an
    exact one. This should not cause problems as we haven’t committed any
    generated or external gettext files into git, so each developer will end
    up regenerating the build system for their system’s version of gettext,
    as expected.
    
    See the subsection of
    https://www.gnu.org/software/gettext/manual/html_node/Version-Control-Issues.html
    for more information.
    
    Note that autoreconf currently doesn’t recognise
    AM_GNU_GETTEXT_REQUIRE_VERSION, so we must continue also using
    AM_GNU_GETTEXT_VERSION. autopoint will ignore the latter if the former
    is present. See
    https://lists.gnu.org/archive/html/autoconf-patches/2015-10/msg00000.html.
    
    This bumps our gettext dependency to 0.19.6, which is when
    AM_GNU_GETTEXT_REQUIRE_VERSION was introduced.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777430

 configure.ac |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fcc0e68..7e5fa46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,9 @@ LT_PREREQ([2.2])
 LT_INIT([disable-static])
 
 # i18n support
-AM_GNU_GETTEXT_VERSION([0.18])
+# FIXME: Remove AM_GNU_GETTEXT_VERSION once autoreconf supports REQUIRE_VERSION
+AM_GNU_GETTEXT_VERSION([0.19.6])
+AM_GNU_GETTEXT_REQUIRE_VERSION([0.19.6])
 AM_GNU_GETTEXT([external])
 
 GETTEXT_PACKAGE=geocode-glib