Handle different versions of Solaris 8 <iso/math_iso.h>, <iso/stdlib_iso.h>
* acinclude.m4 (GLIBCXX_CHECK_MATH_PROTO)
(GLIBCXX_CHECK_STDLIB_PROTO): New tests.
* configure.ac (GLIBCXX_CHECK_MATH_PROTO)
(GLIBCXX_CHECK_STDLIB_PROTO): Call them.
* configure: Regenerate.
* config.h.in: Regenerate.
* config/os/solaris/solaris2.8/os_defines.h
(__CORRECT_ISO_CPP_MATH_H_PROTO2): Don't define.
* config/os/solaris/solaris2.9: Remove.
* configure.host (solaris2.8): Merge with ...
(solaris2.9, solaris2.1[0-9]): ... this.
Always use os/solaris/solaris2.8.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178217
138bc75d-0d04-0410-961f-
82ee72b054a4