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ENV: allow a user-configurable number of make jobs

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Let an environment variable, HOMEBREW_MAKE_JOBS, override the default
'-j<cores>' make flag.

Now we can more easily debug formula that normally build in parallel, or
(potentially) speed up lengthy builds.
This commit is contained in:
Jack Nagel 2011-07-26 00:01:22 -05:00
parent 94abb42567
commit d5f7594748
3 changed files with 24 additions and 2 deletions
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6
Library/Contributions/manpages/brew.1.md
View File

@ -316,6 +316,12 @@ Some sample commands ship with Homebrew and are enabled by default.
If set, Homebrew will not remove files from `share/info`, allowing them If set, Homebrew will not remove files from `share/info`, allowing them
to be linked from the Cellar. to be linked from the Cellar.
* HOMEBREW\_MAKE\_JOBS:
If set, instructs Homebrew to use the value of `HOMEBREW_MAKE_JOBS` as
the number of parallel jobs to run when building with `make`(1).
*Default:* the number of available CPU cores.
* HOMEBREW\_SVN: * HOMEBREW\_SVN:
When exporting from Subversion, Homebrew will use `HOMEBREW_SVN` if set, When exporting from Subversion, Homebrew will use `HOMEBREW_SVN` if set,
a Homebrew-built Subversion if installed, or the system-provided binary. a Homebrew-built Subversion if installed, or the system-provided binary.

11
Library/Homebrew/extend/ENV.rb
View File

@ -8,7 +8,7 @@ module HomebrewEnvExtension
delete('CPPFLAGS') delete('CPPFLAGS')
delete('LDFLAGS') delete('LDFLAGS')
self['MAKEFLAGS'] = "-j#{Hardware.processor_count}" self['MAKEFLAGS'] = "-j#{self.make_jobs}"
unless HOMEBREW_PREFIX.to_s == '/usr/local' unless HOMEBREW_PREFIX.to_s == '/usr/local'
# /usr/local is already an -isystem and -L directory so we skip it # /usr/local is already an -isystem and -L directory so we skip it
@ -309,4 +309,13 @@ Please take one of the following actions:
def use_llvm? def use_llvm?
self['HOMEBREW_USE_LLVM'] or ARGV.include? '--use-llvm' self['HOMEBREW_USE_LLVM'] or ARGV.include? '--use-llvm'
end end
def make_jobs
# '-j' requires a positive integral argument
if self['HOMEBREW_MAKE_JOBS'].to_i > 0
self['HOMEBREW_MAKE_JOBS']
else
Hardware.processor_count
end
end
end end

9
share/man/man1/brew.1
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@ -1,7 +1,7 @@
.\" generated with Ronn/v0.7.3 .\" generated with Ronn/v0.7.3
.\" http://github.com/rtomayko/ronn/tree/0.7.3 .\" http://github.com/rtomayko/ronn/tree/0.7.3
. .
.TH "BREW" "1" "June 2011" "Homebrew" "brew" .TH "BREW" "1" "July 2011" "Homebrew" "brew"
. .
.SH "NAME" .SH "NAME"
\fBbrew\fR \- The missing package manager for OS X \fBbrew\fR \- The missing package manager for OS X
@ -351,6 +351,13 @@ HOMEBREW_KEEP_INFO
If set, Homebrew will not remove files from \fBshare/info\fR, allowing them to be linked from the Cellar\. If set, Homebrew will not remove files from \fBshare/info\fR, allowing them to be linked from the Cellar\.
. .
.TP .TP
HOMEBREW_MAKE_JOBS
If set, instructs Homebrew to use the value of \fBHOMEBREW_MAKE_JOBS\fR as the number of parallel jobs to run when building with \fBmake\fR(1)\.
.
.IP
\fIDefault:\fR the number of available CPU cores\.
.
.TP
HOMEBREW_SVN HOMEBREW_SVN
When exporting from Subversion, Homebrew will use \fBHOMEBREW_SVN\fR if set, a Homebrew\-built Subversion if installed, or the system\-provided binary\. When exporting from Subversion, Homebrew will use \fBHOMEBREW_SVN\fR if set, a Homebrew\-built Subversion if installed, or the system\-provided binary\.
. .