Specify that DJGPP do not have mmap even when sys/mman.h exists

	* configure.ac: Specify that DJGPP do not have mmap even when sys/mman.h exists
	* configure: Regenerate

From-SVN: r231802

libbacktrace/ChangeLog

+2015-12-18  Andris Pavenis  <andris.pavenis@iki.fi>
+
+	* configure.ac: Specify that DJGPP do not have mmap even when sys/mman.h exists
+	* configure: Regenerate
+
 2015-12-09  John David Anglin  <danglin@gcc.gnu.org>
 
 	PR 68115/libfortran

libbacktrace/configure

@@ -12304,9 +12304,10 @@ else
     # simply assume that if we have mman.h, we have mmap.
     have_mmap=yes
     case "${host}" in
-    spu-*-*)
+    spu-*-*|*-*-msdosdjgpp)
         # The SPU does not have mmap, but it has a sys/mman.h header file
         # containing "mmap_eaddr" and the mmap flags, confusing the test.
+        # DJGPP also has sys/man.h, but no mmap
 	have_mmap=no ;;
     esac
   else

libbacktrace/configure.ac

@@ -270,9 +270,10 @@ else
     # simply assume that if we have mman.h, we have mmap.
     have_mmap=yes
     case "${host}" in
-    spu-*-*)
+    spu-*-*|*-*-msdosdjgpp)
         # The SPU does not have mmap, but it has a sys/mman.h header file
         # containing "mmap_eaddr" and the mmap flags, confusing the test.
+        # DJGPP also has sys/man.h, but no mmap
 	have_mmap=no ;;
     esac
   else