X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=INSTALL;h=58b2b86ccf93d045d4c406fe422e94db75533607;hb=b8939b2b3abaa99c18bf57251cd2828b89ac38c5;hp=8120641a513f1528b7e8f312b1ba8f496b936539;hpb=1a2278084fef2ec6928a3d6504972dbddecbcdee;p=git.git

diff --git a/INSTALL b/INSTALL
index 8120641a5..58b2b86cc 100644
--- a/INSTALL
+++ b/INSTALL
@@ -28,16 +28,25 @@ set up install paths (via config.mak.autogen), so you can write instead
 If you're willing to trade off (much) longer build time for a later
 faster git you can also do a profile feedback build with
 
-	$ make profile-all
-	# make prefix=... install
+	$ make prefix=/usr PROFILE=BUILD all
+	# make prefix=/usr PROFILE=BUILD install
 
 This will run the complete test suite as training workload and then
 rebuild git with the generated profile feedback. This results in a git
 which is a few percent faster on CPU intensive workloads.  This
 may be a good tradeoff for distribution packagers.
 
-Note that the profile feedback build stage currently generates
-a lot of additional compiler warnings.
+Or if you just want to install a profile-optimized version of git into
+your home directory, you could run:
+
+	$ make PROFILE=BUILD install
+
+As a caveat: a profile-optimized build takes a *lot* longer since the
+git tree must be built twice, and in order for the profiling
+measurements to work properly, ccache must be disabled and the test
+suite has to be run using only a single CPU.  In addition, the profile
+feedback build stage currently generates a lot of additional compiler
+warnings.
 
 Issues of note:
 
@@ -83,7 +92,11 @@ Issues of note:
 	- "Perl" version 5.8 or later is needed to use some of the
 	  features (e.g. preparing a partial commit using "git add -i/-p",
 	  interacting with svn repositories with "git svn").  If you can
-	  live without these, use NO_PERL.
+	  live without these, use NO_PERL.  Note that recent releases of
+	  Redhat/Fedora are reported to ship Perl binary package with some
+	  core modules stripped away (see http://lwn.net/Articles/477234/),
+	  so you might need to install additional packages other than Perl
+	  itself, e.g. Time::HiRes.
 
 	- "openssl" library is used by git-imap-send to use IMAP over SSL.
 	  If you don't need it, use NO_OPENSSL.