From 95ee539d6d33710cee9bbe051436b2147cebd295 Mon Sep 17 00:00:00 2001
From: Christophe CURIS <christophe.curis@free.fr>
Date: Sun, 16 Jun 2013 21:50:57 +0200
Subject: [PATCH] Configure: Added explicit check for math library header

Compilation will not work if the header is missing, so make sure
it is present and compilable first. This can highligh sooner if
a user forgot to install the corresponding dev package.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
---
 m4/wm_libmath.m4 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/m4/wm_libmath.m4 b/m4/wm_libmath.m4
index 3ff2c467..8d056a2e 100644
--- a/m4/wm_libmath.m4
+++ b/m4/wm_libmath.m4
@@ -22,7 +22,9 @@
 # Checks the needed library link flags needed to have math lib
 # Sets variable LIBM with the appropriates flags
 AC_DEFUN_ONCE([WM_CHECK_LIBM],
-[AC_CHECK_FUNC(atan,
+[AC_CHECK_HEADER([math.h], [],
+                 [AC_MSG_ERROR([header for math library not found])])
+AC_CHECK_FUNC(atan,
     [LIBM=],
     [AC_CHECK_LIB(m, [atan],
         [LIBM=-lm],
-- 
2.11.4.GIT