PR middle-end/39360

[pf3gnuchains/gcc-fork.git] / boehm-gc / configure.host

diff --git a/boehm-gc/configure.host b/boehm-gc/configure.host
index a98a0a7..97f4dac 100644 (file)
--- 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"