From 735cc3dd9476a9058e71fc04e4d87f60b5a89b59 Mon Sep 17 00:00:00 2001
From: bryce <bryce@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 16 Feb 2005 04:10:42 +0000
Subject: 2005-02-15  Bryce McKinlay  <mckinlay@redhat.com>

	PR libgcj/19823
	* configure.host: Set gc_use_mmap on *-linux*.
	* configure.ac: Define USE_MMAP if gc_use_mmap is set.
	* include/private/gc_priv.h: Include gc_config.h.
	* configure, include/gc_config.h.in: Rebuilt.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@95094 138bc75d-0d04-0410-961f-82ee72b054a4
---
 boehm-gc/ChangeLog                 | 8 ++++++++
 boehm-gc/configure                 | 8 ++++++++
 boehm-gc/configure.ac              | 4 ++++
 boehm-gc/configure.host            | 9 +++++++++
 boehm-gc/include/gc_config.h.in    | 3 +++
 boehm-gc/include/private/gc_priv.h | 4 ++++
 6 files changed, 36 insertions(+)

diff --git a/boehm-gc/ChangeLog b/boehm-gc/ChangeLog
index b9c7c46ae05..2194ad5863f 100644
--- a/boehm-gc/ChangeLog
+++ b/boehm-gc/ChangeLog
@@ -1,3 +1,11 @@
+2005-02-15  Bryce McKinlay  <mckinlay@redhat.com>
+
+	PR libgcj/19823
+	* configure.host: Set gc_use_mmap on *-linux*.
+	* configure.ac: Define USE_MMAP if gc_use_mmap is set.
+	* include/private/gc_priv.h: Include gc_config.h.
+	* configure, include/gc_config.h.in: Rebuilt.
+
 2005-02-07  Hans Boehm  <Hans.Boehm@hp.com>
 
 	* allchblk.c (GC_allochblk_nth): Dont overlook available space if
diff --git a/boehm-gc/configure b/boehm-gc/configure
index 36243d4c58b..b205d328c03 100755
--- a/boehm-gc/configure
+++ b/boehm-gc/configure
@@ -6558,6 +6558,14 @@ _ACEOF
   fi
 fi;
 
+if test "${gc_use_mmap}" = "yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define USE_MMAP 1
+_ACEOF
+
+fi
+
 if test -n "$with_cross_host" &&
    test x"$with_cross_host" != x"no"; then
   toolexecdir='$(exec_prefix)/$(target_noncanonical)'
diff --git a/boehm-gc/configure.ac b/boehm-gc/configure.ac
index 208a9160872..dfb0e17e261 100644
--- a/boehm-gc/configure.ac
+++ b/boehm-gc/configure.ac
@@ -446,6 +446,10 @@ AC_ARG_ENABLE(gc-debug,
     esac 
   fi])
 
+if test "${gc_use_mmap}" = "yes"; then
+  AC_DEFINE(USE_MMAP, 1, [use MMAP instead of sbrk to get new memory])
+fi
+
 if test -n "$with_cross_host" &&
    test x"$with_cross_host" != x"no"; then
   toolexecdir='$(exec_prefix)/$(target_noncanonical)'
diff --git a/boehm-gc/configure.host b/boehm-gc/configure.host
index a98a0a7cb30..97f4dacb6de 100644
--- a/boehm-gc/configure.host
+++ b/boehm-gc/configure.host
@@ -18,8 +18,11 @@
 
 # It sets the following shell variables:
 #   gc_cflags	Special CFLAGS to use when building
+#   gc_use_mmap  Set to "yes" on platforms where mmap should be used instead
+#		 of sbrk. This will define USE_MMAP.
 
 gc_cflags=""
+gc_use_mmap=
 
 # We should set -fexceptions if we are using gcc and might be used
 # inside something like gcj.  This is the zeroth approximation:
@@ -37,6 +40,12 @@ else
     esac
 fi
 
+case "${host}" in
+  *-linux*)
+    gc_use_mmap=yes
+    ;;
+esac
+
 case "${target_optspace}:${host}" in
   yes:*)
     gc_cflags="${gc_cflags} -Os"
diff --git a/boehm-gc/include/gc_config.h.in b/boehm-gc/include/gc_config.h.in
index 60ffb9741b6..92f1b2cf460 100644
--- a/boehm-gc/include/gc_config.h.in
+++ b/boehm-gc/include/gc_config.h.in
@@ -145,6 +145,9 @@
 /* define GC_local_malloc() & GC_local_malloc_atomic() */
 #undef THREAD_LOCAL_ALLOC
 
+/* use MMAP instead of sbrk to get new memory */
+#undef USE_MMAP
+
 /* POSIX version of C Source */
 #undef _POSIX_C_SOURCE
 
diff --git a/boehm-gc/include/private/gc_priv.h b/boehm-gc/include/private/gc_priv.h
index e5bd52b62b7..c336ce5c433 100644
--- a/boehm-gc/include/private/gc_priv.h
+++ b/boehm-gc/include/private/gc_priv.h
@@ -19,6 +19,10 @@
 # ifndef GC_PRIVATE_H
 # define GC_PRIVATE_H
 
+/* Autoconf definitions. */
+/* FIXME: This should really be included directly from each .c file. */
+#include <gc_config.h>
+
 #if defined(mips) && defined(SYSTYPE_BSD) && defined(sony_news)
     /* sony RISC NEWS, NEWSOS 4 */
 #   define BSD_TIME
-- 
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