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From c3e6d0a34d9b2be550994c39c264e3f96a2cc43a Mon Sep 17 00:00:00 2001
From: David Michael <fedora.dm0@gmail.com>
Date: Fri, 8 Jan 2021 18:35:16 -0500
Subject: [PATCH] configure.ac: Allow cross-compiling
AC_TRY_RUN fails by default when cross-compiling if it does not
have the fourth parameter. This implements a new cache variable
ac_cv_have_strftime_extension for that test which allows overriding
the result to specify the target system behavior. It defaults to
supporting the extension when cross-compiling.
Signed-off-by: David Michael <fedora.dm0@gmail.com>
---
configure.ac.in | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/configure.ac.in b/configure.ac.in
index b98fce6e..0483c8fa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -133,10 +133,16 @@
dnl ************************************
AC_FUNC_MMAP()
-dnl ***************************************
-dnl *** Check for strftime() extensions ***
-dnl ***************************************
-AC_TRY_RUN([
+dnl ***************************************************************************
+dnl *** Check for strftime() extensions ***
+dnl *** ***
+dnl *** AC_TRY_RUN must be able to build and execute programs natively on ***
+dnl *** the build system, so it fails when cross-compiling unless given an ***
+dnl *** action in the fourth parameter. This sets its results in a cache ***
+dnl *** variable that users can override to specify target system behavior. ***
+dnl ***************************************************************************
+AC_CACHE_CHECK([for strftime %E and %O modifiers],
+ [ac_cv_have_strftime_extension], [AC_TRY_RUN([
#include <string.h>
#include <time.h>
int
@@ -149,9 +155,13 @@
return 0;
return 1;
}
-], [
+ ],
+ [ac_cv_have_strftime_extension=yes],
+ [ac_cv_have_strftime_extension=no],
+ [ac_cv_have_strftime_extension=cross])])
+if test x"$ac_cv_have_strftime_extension" != x"no"; then
AC_DEFINE([HAVE_STRFTIME_EXTENSION], 1, [Define if strftime supports %E and %O modifiers.])
-])
+fi
dnl ******************************
dnl *** Check for i18n support ***
--
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