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libstdc++/48891 Use ::isinf and ::isnan if libc defines them

Message ID 20160115230034.GJ15084@redhat.com
State New
Headers show

Commit Message

Jonathan Wakely Jan. 15, 2016, 11 p.m. UTC 
On 13/01/16 16:26 +0000, Jonathan Wakely wrote:
>On 08/01/16 13:59 +0000, Jonathan Wakely wrote:
>>I'm only checking for those functions for *-*-*gnu* targets, as I
>>don't know of any other targets where it's an issue. Solaris and
>>the BSDs don't define those functions. If it affects other targets we
>>can extend the check to cover them too.

AIX also defines ::isinf and ::isnan, so this extends the configure
check to AIX.

Committed to trunk.
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Patch

commit 4448720e8e3fabe45e49ee56bc469abe7c4b06e0
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Jan 15 14:07:19 2016 +0000

    PR libstdc++/69294 Check for isinf and isnan on AIX
    
    	PR libstdc++/69294
    	* acinclude.m4 (GLIBCXX_CHECK_MATH11_PROTO): Check for obsolete isinf
    	and isnan on AIX. Quote variables.
    	* configure: Regenerate.

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 1e25660..f8dbb95 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -2186,7 +2186,7 @@  AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
       fi
       AC_MSG_RESULT([$glibcxx_cv_math11_overload])
       ;;
-    *-*-*gnu*)
+    *-*-*gnu* | *-*-aix*)
       # If <math.h> defines the obsolete isinf(double) and isnan(double)
       # functions (instead of or as well as the C99 generic macros) then we
       # can't define std::isinf(double) and std::isnan(double) in <cmath>
@@ -3445,9 +3445,9 @@  EOF
   AC_LANG_RESTORE
 
   # Set atomicity_dir to builtins if all but the long long test above passes.
-  if test $glibcxx_cv_atomic_bool = yes \
-     && test $glibcxx_cv_atomic_short = yes \
-     && test $glibcxx_cv_atomic_int = yes; then
+  if test "$glibcxx_cv_atomic_bool" = yes \
+     && test "$glibcxx_cv_atomic_short" = yes \
+     && test "$glibcxx_cv_atomic_int" = yes; then
     AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
     [Define if the compiler supports C++11 atomics.])
     atomicity_dir=cpu/generic/atomicity_builtins