gentoo-overlay/xfce-base/exo/files/exo-4.16.0-allow-cross.patch

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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