X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=hints%2Flinux.sh;h=9837ee8031318c57d21cad07a1ebae7446c0a6b0;hb=0fa156b9cc6e57c94350bf8b3486af3d1c7dd41d;hp=bbd88be00a11bf7c1a61b02dc59f8482eea849cf;hpb=3d413b553d18ab36ed52354b6154662b48ef9648;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/hints/linux.sh b/hints/linux.sh
index bbd88be..9837ee8 100644
--- a/hints/linux.sh
+++ b/hints/linux.sh
@@ -97,7 +97,19 @@ case "$usemymalloc" in
 esac
 
 case "$optimize" in
-'') optimize='-O2' ;;
+'') # If we have modern enough gcc and well-supported enough CPU,
+    # crank up the optimization level.
+    case "`${cc:-gcc} -v 2>&1`" in
+    *gcc-2.95*|*gcc-3.*)
+        case "`arch 2>&1`" in
+        i?86|ppc) optimize='-O3' ;;
+        esac
+        ;;
+    esac
+    case "$optimize" in
+    '') optimize='-O2' ;;
+    esac
+    ;;
 esac
 
 # Are we using ELF?  Thanks to Kenneth Albanowski <kjahds@kjahds.com>