re PR target/78263 (Compile failure with AltiVec library on PPC64le and -std=c++11 flag)

[gcc]

2019-06-04  Bill Schmidt  <wschmidt@linux.ibm.com>

	PR target/78263
	* config/rs6000/altivec.h: Don't #define vector, pixel, bool for
	C++ with strict ANSI requirements.

[gcc/testsuite]

2019-06-04  Bill Schmidt  <wschmidt@linux.ibm.com>

	PR target/78263
	* g++.target/powerpc: New directory.
	* g++.target/powerpc/powerpc.exp: New test driver.
	* g++.target/powerpc/undef-bool-3.C: New.

From-SVN: r271927

gcc/ChangeLog

+2019-06-04  Bill Schmidt  <wschmidt@linux.ibm.com>
+
+	PR target/78263
+	* config/rs6000/altivec.h: Don't #define vector, pixel, bool for
+	C++ with strict ANSI requirements.
+
 2019-06-04  Marc Glisse  <marc.glisse@inria.fr>
 
 	* tree-ssa-loop-niter.c (number_of_iterations_ne): Skip

gcc/config/rs6000/altivec.h

@@ -37,10 +37,12 @@
 /* If __APPLE_ALTIVEC__ is defined, the compiler supports 'vector',
    'pixel' and 'bool' as context-sensitive AltiVec keywords (in 
    non-AltiVec contexts, they revert to their original meanings,
-   if any), so we do not need to define them as macros.  */
+   if any), so we do not need to define them as macros.  Also,
+   avoid defining them as macros for C++ with strict ANSI, as
+   this is not compatible.  */
 
-#if !defined(__APPLE_ALTIVEC__)
-/* You are allowed to undef these for C++ compatibility.  */
+#if !defined(__APPLE_ALTIVEC__) \
+    && (!defined(__STRICT_ANSI__) || !defined(__cplusplus))
 #define vector __vector
 #define pixel __pixel
 #define bool __bool

gcc/testsuite/ChangeLog

+2019-06-04  Bill Schmidt  <wschmidt@linux.ibm.com>
+
+	PR target/78263
+	* g++.target/powerpc: New directory.
+	* g++.target/powerpc/powerpc.exp: New test driver.
+	* g++.target/powerpc/undef-bool-3.C: New.
+
 2019-06-04  Jakub Jelinek  <jakub@redhat.com>
 
 	* c-c++-common/gomp/lastprivate-conditional-2.c (foo): Don't expect

gcc/testsuite/g++.target/powerpc/powerpc.exp

+#  Specific regression driver for PowerPC.
+#  Copyright (C) 2019 Free Software Foundation, Inc.
+#
+#  This file is part of GCC.
+#
+#  GCC is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3, or (at your option)
+#  any later version.
+#
+#  GCC is distributed in the hope that it will be useful, but
+#  WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#  General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with GCC; see the file COPYING3.  If not see
+#  <http://www.gnu.org/licenses/>.  */
+
+# GCC testsuite that uses the `dg.exp' driver.
+
+# Exit immediately if this isn't a PowerPC target.
+if {![istarget powerpc*-*-*] } then {
+  return
+}
+
+# Load support procs.
+load_lib g++-dg.exp
+
+global DEFAULT_CXXFLAGS
+if ![info exists DEFAULT_CXXFLAGS] then {
+    set DEFAULT_CXXFLAGS " -pedantic-errors"
+}
+
+# Initialize `dg'.
+dg-init
+
+# Main loop.
+dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.C]] \
+        "" $DEFAULT_CXXFLAGS
+
+# All done.
+dg-finish
+

gcc/testsuite/g++.target/powerpc/undef-bool-3.C

+/* { dg-do compile } */
+/* { dg-options "-O2 -std=c++11" } */
+
+/* Test to ensure that "bool" is not #define'd in altivec.h for C++ when
+   we require strict ANSI.  We should compile without errors.  */
+
+#include <altivec.h>
+
+bool foo (int x)
+{
+  return x == 2;
+}
+