Handle C++11 <math.h> overloads on Solaris 12

	* acinclude.m4 (GLIBCXX_CHECK_MATH11_PROTO): New test.
	* configure.ac: Use it.
	* configure: Regenerate.
	* config.h.in: Regenerate.

	* include/c_global/cmath [__cplusplus >= 201103L]
	(std::fpclassify): Wrap in !__CORRECT_ISO_CPP11_MATH_H_PROTO.
	(std::isfinite): Likewise.
	(std::isinf): Likewise.
	(std::isnan): Likewise.
	(std::isnormal): Likewise.
	(std::signbit): Likewise.
	(std::isgreater): Likewise.
	(std::isgreaterequal): Likewise.
	(std::isless): Likewise.
	(std::islessequal): Likewise.
	(std::islessgreater): Likewise.
	(std::isunordered): Likewise.
	(std::acosh): Likewise.
	(std::asinh): Likewise.
	(std::atanh): Likewise.
	(std::cbrt): Likewise.
	(std::copysign): Likewise.
	(std::erf): Likewise.
	(std::erfc): Likewise.
	(std::exp2): Likewise.
	(std::expm1): Likewise.
	(std::fdim): Likewise.
	(std::fma): Likewise.
	(std::fmax): Likewise.
	(std::fmin): Likewise.
	(std::hypot): Likewise.
	(std::ilogb): Likewise.
	(std::lgamma): Likewise.
	(std::llrint): Likewise.
	(std::llround): Likewise.
	(std::log1p): Likewise.
	(std::log2): Likewise.
	(std::logb): Likewise.
	(std::lrint): Likewise.
	(std::lround): Likewise.
	(std::nearbyint): Likewise.
	(std::nextafter): Likewise.
	(std::nexttoward): Likewise.
	(std::remainder): Likewise.
	(std::remquo): Likewise.
	(std::rint): Likewise.
	(std::round): Likewise.
	(std::scalbln): Likewise.
	(std::scalbn): Likewise.
	(std::tgamma): Likewise.
	(std::trunc): Likewise.
	* include/tr1/cmath [_GLIBCXX_USE_C99_MATH_TR1] (std::tr1::acosh):
	Wrap in !__CORRECT_ISO_CPP11_MATH_H_PROTO.
	(std::tr1::asinh): Likewise.
	(std::tr1::atanh): Likewise.
	(std::tr1::cbrt): Likewise.
	(std::tr1::copysign): Likewise.
	(std::tr1::erf): Likewise.
	(std::tr1::erfc): Likewise.
	(std::tr1::exp2): Likewise.
	(std::tr1::expm1): Likewise.
	(std::tr1::fabs): Likewise.
	(std::tr1::fdim): Likewise.
	(std::tr1::fma): Likewise.
	(std::tr1::fmax): Likewise.
	(std::tr1::fmin): Likewise.
	(std::tr1::hypot): Likewise.
	(std::tr1::ilogb): Likewise.
	(std::tr1::lgamma): Likewise.
	(std::tr1::llrint): Likewise.
	(std::tr1::llround): Likewise.
	(std::tr1::log1p): Likewise.
	(std::tr1::log2): Likewise.
	(std::tr1::logb): Likewise.
	(std::tr1::lrint): Likewise.
	(std::tr1::lround): Likewise.
	(std::tr1::nearbyint): Likewise.
	(std::tr1::nextafter): Likewise.
	(std::tr1::nexttoward): Likewise.
	(std::tr1::remainder): Likewise.
	(std::tr1::remquo): Likewise.
	(std::tr1::rint): Likewise.
	(std::tr1::scalbln): Likewise.
	(std::tr1::scalbn): Likewise.
	(std::tr1::tgamma): Likewise.
	(std::tr1::trunc): Likewise.
	(std::tr1::pow): Likewise.

	* testsuite/26_numerics/headers/cmath/c99_classification_macros_c.cc:
	Restrict dg-xfail-if, dg-excess-errors to *-*-solaris2.1[01]*.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230807 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 46 insertions, 0 deletions

diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index e6575eae678..312b1fd8924 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -2147,6 +2147,52 @@ AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
 ])
 
 dnl
+dnl Check whether required C++11 overloads are present in <math.h>.
+dnl
+AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
+
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAGS -std=c++11"
+
+  case "$host" in
+    *-*-solaris2.*)
+      # Solaris 12 introduced the C++11 <math.h> overloads.  A backport to
+      # a Solaris 11.3 SRU is likely, maybe even a Solaris 10 patch.
+      AC_MSG_CHECKING([for C++11 <math.h> overloads])
+      AC_CACHE_VAL(glibcxx_cv_math11_overload, [
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE(
+	  [#include <math.h>
+	   #undef isfinite
+	   namespace std {
+	     inline bool isfinite(float __x)
+	     { return __builtin_isfinite(__x); }
+	   }
+	])],
+	[glibcxx_cv_math11_overload=no],
+	[glibcxx_cv_math11_overload=yes]
+      )])
+
+      # autoheader cannot handle indented templates.
+      AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO],
+        [/* Define if all C++11 overloads are available in <math.h>.  */
+#if __cplusplus >= 201103L
+#undef __CORRECT_ISO_CPP11_MATH_H_PROTO
+#endif])
+
+      if test $glibcxx_cv_math11_overload = yes; then
+        AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO)
+      fi
+      AC_MSG_RESULT([$glibcxx_cv_math11_overload])
+      ;;
+  esac
+
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  AC_LANG_RESTORE
+])
+
+dnl
 dnl Check whether macros, etc are present for <system_error>
 dnl
 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [