[PATCH,boehm-gc] Use mmap instead of brk on kfreebsd & hurd too

[Samuel Thibault]

Hello,

Please use mmap instead of brk on kfreebsd and hurd too.
Also, using anonymous memory is faster on the Hurd.

Thanks,
Samuel

2014-08-31 Samuel Thibault <***@ens-lyon.org>

* configure.host: Set gc_use_mmap on *-kfreebsd-gnu* and *-gnu*.
* include/private/gcconfig.h [HURD && USE_MMAP]: Define USE_MMAP_ANON.

Index: boehm-gc/configure.host
===================================================================
--- boehm-gc/configure.host (révision 214763)
+++ boehm-gc/configure.host (copie de travail)
@@ -41,7 +41,7 @@
fi

case "${host}" in
- *-linux*)
+ *-linux*|*-kfreebsd-gnu*|*-gnu*)
gc_use_mmap=yes
;;
esac
Index: boehm-gc/include/private/gcconfig.h
===================================================================
--- boehm-gc/include/private/gcconfig.h (révision 214763)
+++ boehm-gc/include/private/gcconfig.h (copie de travail)
@@ -2132,7 +2132,7 @@
# endif
# endif

-#if defined(LINUX) && defined(USE_MMAP)
+#if (defined(LINUX) || defined(HURD)) && defined(USE_MMAP)
/* The kernel may do a somewhat better job merging mappings etc. */
/* with anonymous mappings. */
# define USE_MMAP_ANON