Greetings,
I am finally getting back to my SD-6 C++ features test work.
This second part adds a __has_include function-like macro that will
return true if a header exists. I also added a __has_include_next
function-like macro as an extension. Clang has this extension.
These macros just wrap the built-ins introduced in the previous patch.
As requested by folk I have rearranged which language-feature macros are
available with what .
There is one bit: arrays of runtime bound. These got kicked out of C++14 I
think and is languishing in a TS.
OTOH, we still support it. It's better than the C99 version we supported.
What direction should I take?
Bootstrapped and tested under x86_64-linux.
OK?
Ed
2014-09-02 Edward Smith-Rowland <3dw...@verizon.net>
Implement SD-6: SG10 Feature Test Recommendations
* c-cppbuiltin.c (c_cpp_builtins()): Define language feature
macros and the __has_header macro.
Index: c-cppbuiltin.c
===================================================================
--- c-cppbuiltin.c (revision 214680)
+++ c-cppbuiltin.c (working copy)
@@ -794,6 +794,12 @@
/* For stddef.h. They require macros defined in c-common.c. */
c_stddef_cpp_builtins ();
+ /* Set include test macros for all C/C++ (not for just C++11 etc.)
+ the builtins __has_include__ and __has_include_next__ are defined
+ in libcpp. */
+ cpp_define (pfile, "__has_include(STR)=__has_include__(STR)");
+ cpp_define (pfile, "__has_include_next(STR)=__has_include_next__(STR)");
+
if (c_dialect_cxx ())
{
if (flag_weak && SUPPORTS_ONE_ONLY)
@@ -800,12 +806,57 @@
cpp_define (pfile, "__GXX_WEAK__=1");
else
cpp_define (pfile, "__GXX_WEAK__=0");
+
if (warn_deprecated)
cpp_define (pfile, "__DEPRECATED");
+
if (flag_rtti)
cpp_define (pfile, "__GXX_RTTI");
+
if (cxx_dialect >= cxx11)
cpp_define (pfile, "__GXX_EXPERIMENTAL_CXX0X__");
+
+ /* Binary literals and variable length arrays have been allowed in g++
+ before C++11 and were standardized for C++14. Runtime sized arrays
+ have C++14 semantics even for C++98. */
+ if (!pedantic || cxx_dialect > cxx11)
+ {
+ cpp_define (pfile, "__cpp_binary_literals=201304");
+ cpp_define (pfile, "__cpp_runtime_arrays=201304");
+ }
+ if (cxx_dialect >= cxx11)
+ {
+ /* Set feature test macros for C++11 */
+ cpp_define (pfile, "__cpp_unicode_characters=200704");
+ cpp_define (pfile, "__cpp_raw_strings=200710");
+ cpp_define (pfile, "__cpp_unicode_literals=200710");
+ cpp_define (pfile, "__cpp_user_defined_literals=200809");
+ cpp_define (pfile, "__cpp_lambdas=200907");
+ cpp_define (pfile, "__cpp_constexpr=200704");
+ cpp_define (pfile, "__cpp_static_assert=200410");
+ cpp_define (pfile, "__cpp_decltype=200707");
+ cpp_define (pfile, "__cpp_attributes=200809");
+ cpp_define (pfile, "__cpp_rvalue_reference=200610");
+ cpp_define (pfile, "__cpp_variadic_templates=200704");
+ cpp_define (pfile, "__cpp_alias_templates=200704");
+ /* Return type deduction was added as an extension to C++11
+ and was standardized for C+14. */
+ cpp_define (pfile, "__cpp_return_type_deduction=201304");
+ }
+ if (cxx_dialect > cxx11)
+ {
+ /* Set feature test macros for C++14 */
+ cpp_define (pfile, "__cpp_init_captures=201304");
+ cpp_define (pfile, "__cpp_generic_lambdas=201304");
+ //cpp_undef (pfile, "__cpp_constexpr");
+ //cpp_define (pfile, "__cpp_constexpr=201304");
+ cpp_define (pfile, "__cpp_decltype_auto=201304");
+ //cpp_define (pfile, "__cpp_aggregate_nsdmi=201304");
+ cpp_define (pfile, "__cpp_variable_templates=201304");
+ cpp_define (pfile, "__cpp_digit_separators=201309");
+ cpp_define (pfile, "__cpp_attribute_deprecated=201309");
+ //cpp_define (pfile, "__cpp_sized_deallocation=201309");
+ }
}
/* Note that we define this for C as well, so that we know if
__attribute__((cleanup)) will interface with EH. */
