r289181 - [Headers] Add #include_next for tgmath.h on Darwin

[Bruno Cardoso Lopes via cfe-commits]

Author: bruno
Date: Thu Dec  8 21:30:46 2016
New Revision: 289181

URL: http://llvm.org/viewvc/llvm-project?rev=289181&view=rev
Log:
[Headers] Add #include_next for tgmath.h on Darwin

Allow darwin to provide additional definitions and implementation
specifc values for tgmath.h on Apple platforms.

rdar://problem/19019845

Added:
    cfe/trunk/test/Headers/Inputs/usr/include/tgmath.h
    cfe/trunk/test/Headers/tgmath-darwin.c
Modified:
    cfe/trunk/lib/Headers/tgmath.h

Modified: cfe/trunk/lib/Headers/tgmath.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Headers/tgmath.h?rev=289181&r1=289180&r2=289181&view=diff
==============================================================================
--- cfe/trunk/lib/Headers/tgmath.h (original)
+++ cfe/trunk/lib/Headers/tgmath.h Thu Dec  8 21:30:46 2016
@@ -25,6 +25,14 @@
 #ifndef __TGMATH_H
 #define __TGMATH_H
 
+/*
+ * Allow additional definitions and implementation-defined values on Apple
+ * platforms.
+ */
+#if defined(__APPLE__) && __STDC_HOSTED__ && __has_include_next(<tgmath.h>)
+#  include_next <tgmath.h>
+#else
+
 /* C99 7.22 Type-generic math <tgmath.h>. */
 #include <math.h>
 
@@ -1371,4 +1379,5 @@ static long double
 #undef _TG_ATTRS
 
 #endif /* __cplusplus */
+#endif /* __has_include_next */
 #endif /* __TGMATH_H */

Added: cfe/trunk/test/Headers/Inputs/usr/include/tgmath.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Headers/Inputs/usr/include/tgmath.h?rev=289181&view=auto
==============================================================================
--- cfe/trunk/test/Headers/Inputs/usr/include/tgmath.h (added)
+++ cfe/trunk/test/Headers/Inputs/usr/include/tgmath.h Thu Dec  8 21:30:46 2016
@@ -0,0 +1,4 @@
+#ifndef SYS_TGMATH_H
+#define SYS_TGMATH_H
+
+#endif /* SYS_TGMATH_H */

Added: cfe/trunk/test/Headers/tgmath-darwin.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Headers/tgmath-darwin.c?rev=289181&view=auto
==============================================================================
--- cfe/trunk/test/Headers/tgmath-darwin.c (added)
+++ cfe/trunk/test/Headers/tgmath-darwin.c Thu Dec  8 21:30:46 2016
@@ -0,0 +1,12 @@
+// REQUIRES: system-darwin
+// RUN: %clang -target x86_64-apple-darwin10 -fsyntax-only -std=c11 -isysroot %S/Inputs %s
+#include <tgmath.h>
+
+// Test the #include_next on tgmath.h works on Darwin.
+#ifndef SYS_TGMATH_H
+  #error "SYS_TGMATH_H not defined"
+#endif
+
+#ifndef __TGMATH_H
+  #error "__TGMATH_H not defined"
+#endif