Hello
The SD-6 [1] document keeps a list of built-in #defines that allow application
and library writers know when certain language and library features have been
implemented by the compiler. They are optional, since a compliant compiler
must implement them all.
But they're really useful.
This patch provides the defines for current GCC 4.9. I don't see anything in
http://gcc.gnu.org/projects/cxx1y.html that indicates newly supported features
for trunk, so the patch should apply to both branches now.
This patch does not add the SD-6 defines to libstdc++.
[1] N3745 and
http://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
>From 5cb90354d18c4edc1dcc11cf3674542409597863 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macie...@intel.com>
Date: Mon, 18 Aug 2014 11:43:36 -0700
Subject: [PATCH 1/1] 2014-08-18 Thiago Macieira <thiago.macie...@intel.com>
* init.c (cpp_init_builtins ()): Set the SD-6 feature defines
in C++11 and C++14 modes.
---
libcpp/init.c | 50 ++++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 42 insertions(+), 8 deletions(-)
diff --git a/libcpp/init.c b/libcpp/init.c
index f10413a..1a9d046 100644
--- a/libcpp/init.c
+++ b/libcpp/init.c
@@ -485,14 +485,48 @@ cpp_init_builtins (cpp_reader *pfile, int hosted)
if (CPP_OPTION (pfile, cplusplus))
{
- if (CPP_OPTION (pfile, lang) == CLK_CXX1Y
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX1Y)
- _cpp_define_builtin (pfile, "__cplusplus 201300L");
- else if (CPP_OPTION (pfile, lang) == CLK_CXX11
- || CPP_OPTION (pfile, lang) == CLK_GNUCXX11)
- _cpp_define_builtin (pfile, "__cplusplus 201103L");
- else
- _cpp_define_builtin (pfile, "__cplusplus 199711L");
+ switch (CPP_OPTION (pfile, lang))
+ {
+ case CLK_GNUCXX1Y:
+ case CLK_CXX1Y:
+ _cpp_define_builtin (pfile, "__cpp_init_captures 201304");
+ _cpp_define_builtin (pfile, "__cpp_decltype_auto 201304");
+ _cpp_define_builtin (pfile, "__cpp_return_type_deduction 201304");
+ if (CPP_OPTION (pfile, lang) == CLK_CXX1Y
+ || CPP_OPTION (pfile, lang) == CLK_GNUCXX1Y)
+ _cpp_define_builtin (pfile, "__cplusplus 201300L");
+ /* fall through */
+
+ case CLK_GNUCXX11:
+ case CLK_CXX11:
+ _cpp_define_builtin (pfile, "__cpp_unicode_characters 200704");
+ _cpp_define_builtin (pfile, "__cpp_unicode_literals 200710");
+ _cpp_define_builtin (pfile, "__cpp_unicode_literals 200710");
+ _cpp_define_builtin (pfile, "__cpp_user_defined_literals 200809");
+ _cpp_define_builtin (pfile, "__cpp_lambdas 200907");
+ _cpp_define_builtin (pfile, "__cpp_static_assert 200410");
+ _cpp_define_builtin (pfile, "__cpp_decltype 200707");
+ _cpp_define_builtin (pfile, "__cpp_attributes 200809");
+ _cpp_define_builtin (pfile, "__cpp_rvalue_references 200610");
+ _cpp_define_builtin (pfile, "__cpp_variadic_templates 200704");
+ if (CPP_OPTION (pfile, lang) == CLK_CXX11
+ || CPP_OPTION (pfile, lang) == CLK_GNUCXX11)
+ {
+ _cpp_define_builtin (pfile, "__cplusplus 201103L");
+ _cpp_define_builtin (pfile, "__cpp_constexpr 200704");
+ }
+ if (CPP_OPTION (pfile, lang) == CLK_CXX11)
+ break;
+ /* fall through */
+
+ default:
+ if (CPP_OPTION (pfile, lang) == CLK_CXX98
+ || CPP_OPTION (pfile, lang) == CLK_GNUCXX)
+ _cpp_define_builtin (pfile, "__cplusplus 199711L");
+ if (CPP_OPTION (pfile, lang) == CLK_CXX98)
+ break;
+ _cpp_define_builtin (pfile, "__cpp_binary_literals 201304");
+ }
}
else if (CPP_OPTION (pfile, lang) == CLK_ASM)
_cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
--
1.8.4.5
