From 6c059f8f5ba69e3f87c6f15ab3959f21e212c495 Mon Sep 17 00:00:00 2001
From: Cosmin Truta <ctruta@gmail.com>
Date: Sat, 11 Aug 2018 00:47:18 -0400
Subject: [PATCH] configure: Remove the memset check and the HAVE_MEMSET macro

The compatibility workaround png_memset() has been removed long ago.
The availability of memset() is a platform requirement.
---
 config.h.in  |  3 ---
 configure    | 13 -------------
 configure.ac |  1 -
 3 files changed, 17 deletions(-)

diff --git a/config.h.in b/config.h.in
index a0ec9bc14..2931048bf 100644
--- a/config.h.in
+++ b/config.h.in
@@ -18,9 +18,6 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
-/* Define to 1 if you have the `memset' function. */
-#undef HAVE_MEMSET
-
 /* Define to 1 if you have the `pow' function. */
 #undef HAVE_POW
 
diff --git a/configure b/configure
index d86d8ed22..17fa130cf 100755
--- a/configure
+++ b/configure
@@ -13066,19 +13066,6 @@ fi
 
 fi
 
-for ac_func in memset
-do :
-  ac_fn_c_check_func "$LINENO" "memset" "ac_cv_func_memset"
-if test "x$ac_cv_func_memset" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_MEMSET 1
-_ACEOF
-
-else
-  as_fn_error $? "memset not found in libc" "$LINENO" 5
-fi
-done
-
 for ac_func in pow
 do :
   ac_fn_c_check_func "$LINENO" "pow" "ac_cv_func_pow"
diff --git a/configure.ac b/configure.ac
index 63287c577..9c4f10428 100644
--- a/configure.ac
+++ b/configure.ac
@@ -144,7 +144,6 @@ AC_C_RESTRICT
 
 # Checks for library functions.
 AC_FUNC_STRTOD
-AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc))
 AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
 
 # Some later POSIX 1003.1 functions are required for test programs, failure here