From patchwork Tue Feb 12 11:57:56 2013
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: RFA: v3 PATCH to add on_quick_exit/quick_exit to std
Date: Tue, 12 Feb 2013 01:57:56 -0000
From: Paolo Carlini <paolo.carlini@oracle.com>
X-Patchwork-Id: 219833
Message-Id: <511A2E44.2090404@oracle.com>
To: dominiq@lps.ens.fr
Cc: libstdc++@gcc.gnu.org, jason@redhat.com, gcc-patches@gcc.gnu.org,
 bkoz@redhat.com

On 02/12/2013 12:40 PM, dominiq@lps.ens.fr wrote:
> IIRC I have already asked a similar question about atan2, erf, ...
> which don't appear in the std namespace on darwin.
You should check whether darwin by chance uses by default c_std instead 
of c_global. The former doesn't provide C++11 facilities. If, on the 
other hand, it uses c_global, it means _GLIBCXX_USE_C99_MATH_TR1 is 
undefined because a configure test fails on that specific darwin release 
you are using. But the last time I checked, modern darwin defined 
_GLIBCXX_USE_C99_MATH_TR1, no problems.

Anyway, about the cstdlib issue the below makes available the new 
functions in c_std/cstdlib too, and I'm going to commit it, it's close 
to what Jason originally committed. But, as I said already we don't 
normally provide C++11 functions in c_std, Benjamin may want to review 
what we are doing in c_std vs c_global, he designed the split.

Paolo.

//////


Index: include/c_std/cstdlib
===================================================================
--- include/c_std/cstdlib	(revision 195968)
+++ include/c_std/cstdlib	(working copy)
@@ -57,6 +57,14 @@
   extern "C" void abort(void) throw () _GLIBCXX_NORETURN;
   extern "C" int atexit(void (*)()) throw ();
   extern "C" void exit(int) throw () _GLIBCXX_NORETURN;
+#if __cplusplus >= 201103L
+# ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
+  extern "C" int at_quick_exit(void (*)()) throw ();
+# endif
+# ifdef _GLIBCXX_HAVE_QUICK_EXIT
+  extern "C" void quick_exit(int) throw() _GLIBCXX_NORETURN;
+# endif
+#endif
 } // namespace
 
 #else
@@ -67,6 +75,11 @@
 #undef abort
 #undef abs
 #undef atexit
+#if __cplusplus >= 201103L
+# ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
+#  undef at_quick_exit
+# endif
+#endif
 #undef atof
 #undef atoi
 #undef atol
@@ -83,6 +96,11 @@
 #undef mbstowcs
 #undef mbtowc
 #undef qsort
+#if __cplusplus >= 201103L
+# ifdef _GLIBCXX_HAVE_QUICK_EXIT
+#  undef quick_exit
+# endif
+#endif
 #undef rand
 #undef realloc
 #undef srand
@@ -103,6 +121,11 @@
   using ::abort;
   using ::abs;
   using ::atexit;
+#if __cplusplus >= 201103L
+# ifdef _GLIBCXX_HAVE_AT_QUICK_EXIT
+  using ::at_quick_exit;
+# endif
+#endif
   using ::atof;
   using ::atoi;
   using ::atol;
@@ -121,6 +144,11 @@
   using ::mbtowc;
 #endif // _GLIBCXX_HAVE_MBSTATE_T
   using ::qsort;
+#if __cplusplus >= 201103L
+# ifdef _GLIBCXX_HAVE_QUICK_EXIT
+  using ::quick_exit;
+# endif
+#endif
   using ::rand;
   using ::realloc;
   using ::srand;