From b5b7b8c5c76838350f1857a40c428c9092f9da8e Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Tue, 15 Feb 2022 17:21:25 +0900
Subject: build: Fix m4/gpg-error.m4.

* m4/gpg-error.m4: Unset GPGRT_CONFIG when it doesn't work well.

--

Cherry-picked the master commit of:
	bff9f1b024647e18b2c87dcd769c0e449f7752e6

With older version of libgpg-error (< 1.33), the gpgrt-config
script doesn't support .pc files.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
---
 m4/gpg-error.m4 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/m4/gpg-error.m4 b/m4/gpg-error.m4
index 56a5d075..4b5cd40b 100644
--- a/m4/gpg-error.m4
+++ b/m4/gpg-error.m4
@@ -10,7 +10,7 @@
 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 #
-# Last-changed: 2021-03-31
+# Last-changed: 2022-02-15
 
 
 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
@@ -139,6 +139,7 @@ AC_DEFUN([AM_PATH_GPG_ERROR],
     fi
   elif test "$GPG_ERROR_CONFIG" != "no"; then
     gpg_error_config_version=`$GPG_ERROR_CONFIG --version`
+    unset GPGRT_CONFIG
   fi
   if test "$GPG_ERROR_CONFIG" != "no"; then
     req_major=`echo $min_gpg_error_version | \
-- 
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