>From ef458c87188265ccd056376432f4a84ad4e965ad Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Sat, 17 Dec 2016 20:32:14 +0100
Subject: [PATCH 13/20] log10l: Avoid redefinition error on MSVC.

* m4/log10l.m4 (gl_FUNC_LOG10L): Set REPLACE_LOG10L to 1 if the function
may be defined as an inline function.
---
 ChangeLog    | 6 ++++++
 m4/log10l.m4 | 6 +++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 61b04bf..7886bd9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2016-12-17  Bruno Haible  <address@hidden>
 
+	log10l: Avoid redefinition error on MSVC.
+	* m4/log10l.m4 (gl_FUNC_LOG10L): Set REPLACE_LOG10L to 1 if the function
+	may be defined as an inline function.
+
+2016-12-17  Bruno Haible  <address@hidden>
+
 	log10f: Avoid redefinition error on MSVC.
 	* m4/log10f.m4 (gl_FUNC_LOG10F): Set REPLACE_LOG10F to 1 if the function
 	may be defined as an inline function.
diff --git a/m4/log10l.m4 b/m4/log10l.m4
index 8ea35a7..a31f5cf 100644
--- a/m4/log10l.m4
+++ b/m4/log10l.m4
@@ -1,4 +1,4 @@
-# log10l.m4 serial 3
+# log10l.m4 serial 4
 dnl Copyright (C) 2011-2016 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -35,6 +35,10 @@ AC_DEFUN([gl_FUNC_LOG10L],
     esac
   else
     HAVE_LOG10L=0
+    dnl If the function is declared but does not appear to exist, it may be
+    dnl defined as an inline function. In order to avoid a conflict, we have
+    dnl to define rpl_log10l, not log10l.
+    AC_CHECK_DECLS([log10l], [REPLACE_LOG10L=1], , [[#include <math.h>]])
   fi
   if test $HAVE_LOG10L = 0 || test $REPLACE_LOG10L = 1; then
     if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
-- 
2.6.4