ia64: fpu: fix gamma definition handling [BZ #15421]

The rework in commit d709042 broke
buiding on ia64 due to compat_symbol expanding into ... in some cases.
The common files were wrapped in a BUILD_LGAMMA check, but the ia64
ones were not.  Add that logic to the ia64 files too.

ChangeLog

@@ -1,3 +1,11 @@
+2016-01-01  Mike Frysinger  <vapier@gentoo.org>
+
+	[BZ #15421]
+	* sysdeps/ia64/fpu/w_lgamma_main.c: Include math.h & math_private.h.
+	[BUILD_LGAMMA]: Wrap all code by define.  Re-indent sub-preprocessor.
+	* sysdeps/ia64/fpu/w_lgammaf_main.c: Likewise.
+	* sysdeps/ia64/fpu/w_lgammal_main.c: Likewise.
+
 2015-12-30  Dmitry V. Levin  <ldv@altlinux.org>
 
 	[BZ #19408]

sysdeps/ia64/fpu/w_lgamma_main.c

@@ -53,21 +53,25 @@
 
 #include "libm_support.h"
 
+#include <math.h>
+#include <math_private.h>
+
 #include <lgamma-compat.h>
 
 extern double __libm_lgamma(double /*x*/, int* /*signgam*/, int /*signgamsz*/);
 
-
+#if BUILD_LGAMMA
 double LGFUNC (lgamma) (double x)
 {
     return CALL_LGAMMA (double, __libm_lgamma, x);
 }
-#if USE_AS_COMPAT
+# if USE_AS_COMPAT
 compat_symbol (libm, __lgamma_compat, lgamma, LGAMMA_OLD_VER);
-#else
+# else
 versioned_symbol (libm, __ieee754_lgamma, lgamma, LGAMMA_NEW_VER);
-#endif
-#if GAMMA_ALIAS
+# endif
+# if GAMMA_ALIAS
 strong_alias (LGFUNC (lgamma), __ieee754_gamma)
 weak_alias (__ieee754_gamma, gamma)
+# endif
 #endif

sysdeps/ia64/fpu/w_lgammaf_main.c

@@ -53,21 +53,25 @@
 
 #include "libm_support.h"
 
+#include <math.h>
+#include <math_private.h>
+
 #include <lgamma-compat.h>
 
 extern float  __libm_lgammaf(float /*x*/, int* /*signgam*/, int /*signgamsz*/);
 
-
+#if BUILD_LGAMMA
 float LGFUNC (lgammaf) (float x)
 {
     return CALL_LGAMMA (float, __libm_lgammaf, x);
 }
-#if USE_AS_COMPAT
+# if USE_AS_COMPAT
 compat_symbol (libm, __lgammaf_compat, lgammaf, LGAMMA_OLD_VER);
-#else
+# else
 versioned_symbol (libm, __ieee754_lgammaf, lgammaf, LGAMMA_NEW_VER);
-#endif
-#if GAMMA_ALIAS
+# endif
+# if GAMMA_ALIAS
 strong_alias (LGFUNC (lgammaf), __ieee754_gammaf)
 weak_alias (__ieee754_gammaf, gammaf)
+# endif
 #endif

sysdeps/ia64/fpu/w_lgammal_main.c

@@ -52,21 +52,25 @@
 
 #include "libm_support.h"
 
-
-extern double __libm_lgammal(long double /*x*/, int* /*signgam*/, int /*signgamsz*/);
+#include <math.h>
+#include <math_private.h>
 
 #include <lgamma-compat.h>
 
+extern double __libm_lgammal(long double /*x*/, int* /*signgam*/, int /*signgamsz*/);
+
+#if BUILD_LGAMMA
 long double LGFUNC (lgammal) (long double x)
 {
     return CALL_LGAMMA (long double, __libm_lgammal, x);
 }
-#if USE_AS_COMPAT
+# if USE_AS_COMPAT
 compat_symbol (libm, __lgammal_compat, lgammal, LGAMMA_OLD_VER);
-#else
+# else
 versioned_symbol (libm, __ieee754_lgammal, lgammal, LGAMMA_NEW_VER);
-#endif
-#if GAMMA_ALIAS
+# endif
+# if GAMMA_ALIAS
 strong_alias (LGFUNC (lgammal), __ieee754_gammal)
 weak_alias (__ieee754_gammal, gammal)
+# endif
 #endif