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
+ # 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.
+Alternatively you can run profile feedback only with the git benchmark
+suite. This runs significantly faster than the full test suite, but
+has less coverage:
+
+ $ make prefix=/usr profile-fast
+ # make prefix=/usr PROFILE=BUILD install
+
+Or if you just want to install a profile-optimized version of git into
+your home directory, you could run:
+
+ $ make profile-install
+
+or
+ $ make profile-fast-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:
- "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.
+ - git-imap-send needs the OpenSSL library to talk IMAP over SSL if
+ you are using libcurl older than 7.34.0. Otherwise you can use
+ NO_OPENSSL without losing git-imap-send.
- By default, git uses OpenSSL for SHA1 but it will use it's own
+ By default, git uses OpenSSL for SHA1 but it will use its own
library (inspired by Mozilla's) with either NO_OPENSSL or
BLK_SHA1. Also included is a version optimized for PowerPC
(PPC_SHA1).
- - "libcurl" library is used by git-http-fetch and git-fetch. You
- might also want the "curl" executable for debugging purposes.
- If you do not use http:// or https:// repositories, you do not
- have to have them (use NO_CURL).
+ - "libcurl" library is used by git-http-fetch, git-fetch, and, if
+ the curl version >= 7.34.0, for git-imap-send. You might also
+ want the "curl" executable for debugging purposes. If you do not
+ use http:// or https:// repositories, and do not want to put
+ patches into an IMAP mailbox, you do not have to have them
+ (use NO_CURL).
- "expat" library; git-http-push uses it for remote lock
management over DAV. Similar to "curl" above, this is optional
use English. Under autoconf the configure script will do this
automatically if it can't find libintl on the system.
+ - Python version 2.4 or later (but not 3.x, which is not
+ supported by Perforce) is needed to use the git-p4 interface
+ to Perforce.
+
- Some platform specific issues are dealt with Makefile rules,
but depending on your specific installation, you may not
have all the libraries/tools needed, or you may have
makeinfo and docbook2X. Version 0.8.3 is known to work.
Building and installing the pdf file additionally requires
- dblatex. Version 0.2.7 with asciidoc >= 8.2.7 is known to work.
+ dblatex. Version >= 0.2.7 is known to work.
- The documentation is written for AsciiDoc 7, but by default
- uses some compatibility wrappers to work on AsciiDoc 8. If you have
- AsciiDoc 7, try "make ASCIIDOC7=YesPlease".
+ All formats require at least asciidoc 8.4.1.
There are also "make quick-install-doc", "make quick-install-man"
and "make quick-install-html" which install preformatted man pages