1 files changed, 0 insertions, 93 deletions
diff --git a/gcc/acinclude.m4 b/gcc/acinclude.m4
index 84b828fe598..c24464b5977 100644
--- a/gcc/acinclude.m4
+++ b/gcc/acinclude.m4
@@ -221,99 +221,6 @@ test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
 AC_SUBST(INSTALL_DATA)dnl
 ])
 
-# mmap(2) blacklisting.  Some platforms provide the mmap library routine
-# but don't support all of the features we need from it.
-AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST],
-[
-AC_CHECK_HEADER([sys/mman.h],
-		[gcc_header_sys_mman_h=yes], [gcc_header_sys_mman_h=no])
-AC_CHECK_FUNC([mmap], [gcc_func_mmap=yes], [gcc_func_mmap=no])
-if test "$gcc_header_sys_mman_h" != yes \
- || test "$gcc_func_mmap" != yes; then
-   gcc_cv_func_mmap_file=no
-   gcc_cv_func_mmap_dev_zero=no
-   gcc_cv_func_mmap_anon=no
-else
-   AC_CACHE_CHECK([whether read-only mmap of a plain file works], 
-  gcc_cv_func_mmap_file,
-  [# Add a system to this blacklist if 
-   # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a
-   # memory area containing the same data that you'd get if you applied
-   # read() to the same fd.  The only system known to have a problem here
-   # is VMS, where text files have record structure.
-   case "$host_os" in
-     vms* | ultrix*) 
-        gcc_cv_func_mmap_file=no ;;
-     *)
-        gcc_cv_func_mmap_file=yes;;
-   esac])
-   AC_CACHE_CHECK([whether mmap from /dev/zero works],
-  gcc_cv_func_mmap_dev_zero,
-  [# Add a system to this blacklist if it has mmap() but /dev/zero
-   # does not exist, or if mmapping /dev/zero does not give anonymous
-   # zeroed pages with both the following properties:
-   # 1. If you map N consecutive pages in with one call, and then
-   #    unmap any subset of those pages, the pages that were not
-   #    explicitly unmapped remain accessible.
-   # 2. If you map two adjacent blocks of memory and then unmap them
-   #    both at once, they must both go away.
-   # Systems known to be in this category are Windows (all variants),
-   # VMS, and Darwin.
-   case "$host_os" in
-     vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00)
-        gcc_cv_func_mmap_dev_zero=no ;;
-     *)
-        gcc_cv_func_mmap_dev_zero=yes;;
-   esac])
-
-   # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for.
-   AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon,
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-[#include <sys/types.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-],
-[int n = MAP_ANONYMOUS;])],
-    gcc_cv_decl_map_anon=yes,
-    gcc_cv_decl_map_anon=no)])
-
-   if test $gcc_cv_decl_map_anon = no; then
-     gcc_cv_func_mmap_anon=no
-   else
-     AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works],
-     gcc_cv_func_mmap_anon,
-  [# Add a system to this blacklist if it has mmap() and MAP_ANON or
-   # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
-   # doesn't give anonymous zeroed pages with the same properties listed
-   # above for use of /dev/zero.
-   # Systems known to be in this category are Windows, VMS, and SCO Unix.
-   case "$host_os" in
-     vms* | cygwin* | pe | mingw* | sco* | udk* )
-        gcc_cv_func_mmap_anon=no ;;
-     *)
-        gcc_cv_func_mmap_anon=yes;;
-   esac])
-   fi
-fi
-
-if test $gcc_cv_func_mmap_file = yes; then
-  AC_DEFINE(HAVE_MMAP_FILE, 1,
-	    [Define if read-only mmap of a plain file works.])
-fi
-if test $gcc_cv_func_mmap_dev_zero = yes; then
-  AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1,
-	    [Define if mmap of /dev/zero works.])
-fi
-if test $gcc_cv_func_mmap_anon = yes; then
-  AC_DEFINE(HAVE_MMAP_ANON, 1,
-	    [Define if mmap with MAP_ANON(YMOUS) works.])
-fi
-])
-
 dnl Determine if enumerated bitfields are unsigned.   ISO C says they can 
 dnl be either signed or unsigned.
 dnl