require gettext 0.18; force autoreconf in autogen.sh; resolves #3561759

Autoconf had trouble finding the shared libraries for gettext. Using
gettext 0.18 fixes that.

When updating the gettext version number, autoreconf could fail to
update files, since autopoint would assume the gettext-related files had
been locally modified. Passing --force prevents that from happening.

1 files changed, 1 insertions, 1 deletions

diff --git a/autogen.sh b/autogen.sh
index 20e82fd..a298f07 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -29,4 +29,4 @@
 #Makefile first.)
 
 touch ChangeLog
-autoreconf --install --verbose
+autoreconf --install --verbose --force