From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Wed, 28 Nov 2001 14:15:25 +0000 (+0000)
Subject: In Linux if we have modern enough gcc and supported
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=eb782340ac189f87a9572b63a1fcb9dd8bc50473;p=p5sagit%2Fp5-mst-13.2.git

In Linux if we have modern enough gcc and supported
enough CPU, crank up the optimization level to -O3.

p4raw-id: //depot/perl@13342
---

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>