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From 3f1ddda424353f0f926dd28efa47b0ac61556ce8 Mon Sep 17 00:00:00 2001
From: Eddie Kohler <ekohler@gmail.com>
Date: Wed, 16 Aug 2017 12:37:34 -0400
Subject: [PATCH] Check for memmem declaration; sometimes it is not declared by
default.
---
configure.ac | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 5b4e3ff..b4dc4fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,7 @@ dnl strerror()?
dnl
AC_REPLACE_FUNCS([strerror memmem])
+AC_CHECK_DECLS([memmem])
dnl
@@ -88,7 +89,7 @@ char* strerror(int errno);
#endif
/* Prototype memmem if we don't have it. */
-#if !HAVE_MEMMEM
+#if !HAVE_MEMMEM || !HAVE_DECL_MEMMEM
void* memmem(const void* haystack, size_t haystack_len,
const void* needle, size_t needle_len);
#endif
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