[Patch] configure patch for caddr_t and ssize_t types

[Steve Ellcey]

While doing a canadian cross build I ran into a problem with the caddr_t
type.  configure.ac is using an obsolete version of AC_CHECK_TYPE to
create #define's of caddr_t and ssize_t if they are not defined by the
system.  In addition to using an obsolete version of AC_CHECK_TYPE this
was causing a problem in my build because caddr_t was also getting set via
a typedef by the mingw compilers.

Here is my fix, tested with a canadian cross build and with a native x86
linux build.

OK to checkin?


2013-11-01  Steve Ellcey  <sell...@mips.com>

        * configure.ac: Add header checks for fenv.h and complex.h.
        * configure: Regenerate.
        * config.in: Regnerate.
        * system.h: Add default caddr_t and ssize_t typedefs.


diff --git a/gcc/configure.ac b/gcc/configure.ac
index 5e686db..bc87073 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -1075,8 +1075,8 @@ int main()
   fi
 fi
 
-AC_CHECK_TYPE(ssize_t, int)
-AC_CHECK_TYPE(caddr_t, char *)
+AC_CHECK_TYPES([ssize_t])
+AC_CHECK_TYPES([caddr_t])
 
 GCC_AC_FUNC_MMAP_BLACKLIST
 
diff --git a/gcc/system.h b/gcc/system.h
index a1fc6de..108ec0e 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -1060,6 +1060,14 @@ helper_const_non_const_cast (const char *p)
 #define DEBUG_VARIABLE
 #endif
 
+#ifndef HAVE_CADDR_T
+typedef char *caddr_t;
+#endif
+
+#ifndef HAVE_SSIZE_T
+typedef int ssize_t
+#endif
+
 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 #include "hwint.h"