From dcf360d688551738bd53fb696e828695c238f03c Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Wed, 18 Jan 2023 10:54:55 +0100
Subject: [PATCH] Avoid implicit declaration memset in have_fpos_pos.c probe

Otherwise, the probe result changes with compilers which do not
support implicit function declarations, a language feature that
was removed from C in 1999.
---
 Makefile        | 2 +-
 Makefile.simple | 2 +-
 have_fpos_pos.c | 4 ++++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 6068d9d..22c2e4a 100644
--- a/Makefile
+++ b/Makefile
@@ -3226,7 +3226,7 @@ have_fgetsetpos.h: have_fgetsetpos.c banned.h have_ban_pragma.h ${MAKE_FILE} ${L
 	    ${TRUE}; \
 	fi
 
-have_fpos_pos.h: have_fpos_pos.c have_fgetsetpos.h have_posscl.h \
+have_fpos_pos.h: have_fpos_pos.c have_fgetsetpos.h have_posscl.h have_string.h \
 		 banned.h have_ban_pragma.h ${MAKE_FILE} ${LOC_MKF}
 	${Q} ${RM} -f fpos_tmp $@
 	${H} echo 'forming $@'
diff --git a/Makefile.simple b/Makefile.simple
index bac6d5d..578832a 100644
--- a/Makefile.simple
+++ b/Makefile.simple
@@ -2540,7 +2540,7 @@ have_fgetsetpos.h: have_fgetsetpos.c banned.h have_ban_pragma.h ${MAKE_FILE} ${L
 	    ${TRUE}; \
 	fi
 
-have_fpos_pos.h: have_fpos_pos.c have_fgetsetpos.h have_posscl.h \
+have_fpos_pos.h: have_fpos_pos.c have_fgetsetpos.h have_posscl.h have_string.h \
 		 banned.h have_ban_pragma.h ${MAKE_FILE} ${LOC_MKF}
 	${Q} ${RM} -f fpos_tmp $@
 	${H} echo 'forming $@'
diff --git a/have_fpos_pos.c b/have_fpos_pos.c
index 72e2fa4..0527905 100644
--- a/have_fpos_pos.c
+++ b/have_fpos_pos.c
@@ -28,6 +28,10 @@
 #include <stdio.h>
 #include "have_fgetsetpos.h"
 #include "have_posscl.h"
+#include "have_string.h"
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
 
 
 #include "banned.h"	/* include after system header <> includes */