[PATCH] Fix -Wundef warnins for __FP_FAST_FMA*

[Siddhesh Poyarekar <siddhesh at redhat dot com>]

The macros are defined by the compiler, so we can only verify whether
they are defined or not.

I have made changes to the arm and tile bits as well, but I have not
tested them.  OK to commit?

Siddhesh

	* bits/mathdef.h: Use #ifdef instead of #if.
 	* sysdeps/arm/bits/mathdef.h [defined __USE_ISOC99 && defined
	_MATH_H && !defined _MATH_H_MATHDEF]: Likewise.
 	* sysdeps/tile/bits/mathdef.h [defined __USE_ISOC99 && defined
	_MATH_H && !defined _MATH_H_MATHDEF]: Likewise.
 	* sysdeps/x86/bits/mathdef.h [defined __USE_ISOC99 && defined
	_MATH_H && !defined _MATH_H_MATHDEF]: Likewise.


---
 bits/mathdef.h              | 6 +++---
 sysdeps/arm/bits/mathdef.h  | 6 +++---
 sysdeps/tile/bits/mathdef.h | 6 +++---
 sysdeps/x86/bits/mathdef.h  | 6 +++---
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/bits/mathdef.h b/bits/mathdef.h
index ca1f464..f27ecac 100644
--- a/bits/mathdef.h
+++ b/bits/mathdef.h
@@ -35,15 +35,15 @@ typedef double double_t;	/* `double' expressions are evaluated as
 
 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
    builtins are supported.  */
-#if __FP_FAST_FMA
+#ifdef __FP_FAST_FMA
 # define FP_FAST_FMA 1
 #endif
 
-#if __FP_FAST_FMAF
+#ifdef __FP_FAST_FMAF
 # define FP_FAST_FMAF 1
 #endif
 
-#if __FP_FAST_FMAL
+#ifdef __FP_FAST_FMAL
 # define FP_FAST_FMAL 1
 #endif
 
diff --git a/sysdeps/arm/bits/mathdef.h b/sysdeps/arm/bits/mathdef.h
index be727e5..f309002 100644
--- a/sysdeps/arm/bits/mathdef.h
+++ b/sysdeps/arm/bits/mathdef.h
@@ -34,15 +34,15 @@ typedef double double_t;	/* `double' expressions are evaluated as
 
 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
    builtins are supported.  */
-# if __FP_FAST_FMA
+# ifdef __FP_FAST_FMA
 #  define FP_FAST_FMA 1
 # endif
 
-# if __FP_FAST_FMAF
+# ifdef __FP_FAST_FMAF
 #  define FP_FAST_FMAF 1
 # endif
 
-# if __FP_FAST_FMAL
+# ifdef __FP_FAST_FMAL
 #  define FP_FAST_FMAL 1
 # endif
 
diff --git a/sysdeps/tile/bits/mathdef.h b/sysdeps/tile/bits/mathdef.h
index d043b4a..c26a2e7 100644
--- a/sysdeps/tile/bits/mathdef.h
+++ b/sysdeps/tile/bits/mathdef.h
@@ -33,15 +33,15 @@ typedef double double_t;
 
 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
    builtins are supported.  */
-# if __FP_FAST_FMA
+# ifdef __FP_FAST_FMA
 #  define FP_FAST_FMA 1
 # endif
 
-# if __FP_FAST_FMAF
+# ifdef __FP_FAST_FMAF
 #  define FP_FAST_FMAF 1
 # endif
 
-# if __FP_FAST_FMAL
+# ifdef __FP_FAST_FMAL
 #  define FP_FAST_FMAL 1
 # endif
 
diff --git a/sysdeps/x86/bits/mathdef.h b/sysdeps/x86/bits/mathdef.h
index 07c2d66..fd9cf42 100644
--- a/sysdeps/x86/bits/mathdef.h
+++ b/sysdeps/x86/bits/mathdef.h
@@ -44,15 +44,15 @@ typedef long double double_t;	/* `double' expressions are evaluated as
 
 /* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
    builtins are supported.  */
-# if __FP_FAST_FMA
+# ifdef __FP_FAST_FMA
 #  define FP_FAST_FMA 1
 # endif
 
-# if __FP_FAST_FMAF
+# ifdef __FP_FAST_FMAF
 #  define FP_FAST_FMAF 1
 # endif
 
-# if __FP_FAST_FMAL
+# ifdef __FP_FAST_FMAL
 #  define FP_FAST_FMAL 1
 # endif
 
-- 
1.8.3.1

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