Explicitly request gettext

Author: sarahec

configure.ac

@@ -21,6 +21,7 @@ LT_INIT([disable-static])
 
 AC_PROG_CC
 AC_PROG_CXX
+AC_CONFIG_MACRO_DIRS([m4])
 
 AC_ARG_ENABLE([code-coverage], AS_HELP_STRING([--enable-code-coverage], [Enable code coverage profiling]), [code_coverage=yes], [code_coverage=no])
 AC_ARG_ENABLE([fuzz-testing], AS_HELP_STRING([--enable-fuzz-testing], ["Enable fuzz testing (requires Clang 6 or later)"]), [
@@ -40,6 +41,8 @@ AC_ARG_ENABLE([fuzz-testing], AS_HELP_STRING([--enable-fuzz-testing], ["Enable f
 AM_CONDITIONAL([FUZZER_ENABLED], test "x$fuzzer" = "xyes")
 AC_SUBST([SANITIZERS])
 
+AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION([0.22])
 AM_ICONV
 
 AC_CANONICAL_HOST