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.

From-SVN: r232455

libstdc++-v3/ChangeLog

+2016-01-15  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/69294
+	* acinclude.m4 (GLIBCXX_CHECK_MATH11_PROTO): Check for obsolete isinf
+	and isnan on AIX. Quote variables.
+	* configure: Regenerate.
+
 2016-01-15  Torvald Riegel  <triegel@redhat.com>
 
 	* include/bits/basic_string.h (basic_string): Declare friends.

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

libstdc++-v3/configure

@@ -15539,9 +15539,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
   # 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
 
 $as_echo "#define _GLIBCXX_ATOMIC_BUILTINS 1" >>confdefs.h
 
@@ -18177,7 +18177,7 @@ fi
       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_math11_overload" >&5
 $as_echo "$glibcxx_cv_math11_overload" >&6; }
       ;;
-    *-*-*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>