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# Copyright 2009 Max Howell and other contributors.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
module HomebrewEnvExtension
# -w: keep signal to noise high
# -fomit-frame-pointer: we are not debugging this software, we are using it
SAFE_CFLAGS_FLAGS = "-w -pipe -fomit-frame-pointer"
def setup_build_environment
# Clear CDPATH to avoid make issues that depend on changing directories
ENV.delete('CDPATH')
ENV['MACOSX_DEPLOYMENT_TARGET']=MACOS_VERSION.to_s
ENV['MAKEFLAGS']="-j#{Hardware.processor_count}"
unless HOMEBREW_PREFIX.to_s == '/usr/local'
# /usr/local is always in the build system path so only add other paths
ENV['CPPFLAGS'] = "-I#{HOMEBREW_PREFIX}/include"
ENV['LDFLAGS'] = "-L#{HOMEBREW_PREFIX}/lib"
else
# ignore existing build vars, thus we should have less bugs to deal with
ENV['CPPFLAGS'] = ''
ENV['LDFLAGS'] = ''
end
if MACOS_VERSION >= 10.6 or ENV['HOMEBREW_USE_LLVM']
# you can install Xcode wherever you like you know.
prefix = `/usr/bin/xcode-select -print-path`.chomp
prefix = "/Developer" if prefix.to_s.empty?
ENV['CC'] = "#{prefix}/usr/llvm-gcc-4.2/bin/llvm-gcc-4.2"
ENV['CXX'] = "#{prefix}/usr/llvm-gcc-4.2/bin/llvm-g++-4.2"
cflags = ['-O4'] # O4 baby!
else
ENV['CC']="gcc-4.2"
ENV['CXX']="g++-4.2"
cflags = ['-O3']
end
# in rare cases this may break your builds, as the tool for some reason wants
# to use a specific linker, however doing this in general causes formula to
# build more successfully because we are changing CC and many build systems
# don't react properly to that
ENV['LD']=ENV['CC']
# optimise all the way to eleven, references:
# http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel
# http://forums.mozillazine.org/viewtopic.php?f=12&t=577299
# http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/i386-and-x86_002d64-Options.html
if MACOS_VERSION >= 10.6
case Hardware.intel_family
when :penryn, :core2
# no need to add -mfpmath it happens automatically with 64 bit compiles
cflags << "-march=core2"
when :core
cflags<<"-march=prescott"<<"-mfpmath=sse"
end
else
case Hardware.intel_family
when :penryn, :core2
cflags<<"-march=nocona"
when :core
cflags<<"-march=prescott"
end
cflags<<"-mfpmath=sse"
end
cflags<<"-mmmx"
case Hardware.intel_family
when :nehalem
cflags<<"-msse4.2"
when :penryn
cflags<<"-msse4.1"
when :core2, :core
cflags<<"-msse3"
end
ENV['CFLAGS']=ENV['CXXFLAGS']="#{cflags*' '} #{SAFE_CFLAGS_FLAGS} -mmacosx-version-min=#{MACOS_VERSION}"
end
def deparallelize
remove 'MAKEFLAGS', /-j\d+/
end
alias_method :j1, :deparallelize
def O3
# Sometimes O4 just takes fucking forever
remove_from_cflags '-O4'
append_to_cflags '-O3'
end
def O2
# Sometimes O3 doesn't work or produces bad binaries
remove_from_cflags '-O4'
remove_from_cflags '-O3'
append_to_cflags '-O2'
end
def gcc_4_0_1
case MACOS_VERSION
when 10.5
self['CC']=nil
self['CXX']=nil
self['LD']=nil
when 10.6..11.0
self['CC']='gcc-4.0'
self['CXX']='g++-4.0'
self['LD']=self['CC']
remove_from_cflags '-march=core2'
self.O3
end
remove_from_cflags '-msse4.1'
remove_from_cflags '-msse4.2'
end
def gcc_4_2
# Sometimes you want to downgrade from LLVM to GCC 4.2
self['CC']="gcc-4.2"
self['CXX']="g++-4.2"
self['LD']=self['CC']
self.O3
end
def osx_10_4
self['MACOSX_DEPLOYMENT_TARGET']="10.4"
remove_from_cflags(/ ?-mmacosx-version-min=10\.\d/)
append_to_cflags('-mmacosx-version-min=10.4')
end
def osx_10_5
self['MACOSX_DEPLOYMENT_TARGET']="10.5"
remove_from_cflags(/ ?-mmacosx-version-min=10\.\d/)
append_to_cflags('-mmacosx-version-min=10.5')
end
def minimal_optimization
self['CFLAGS']=self['CXXFLAGS']="-Os #{SAFE_CFLAGS_FLAGS}"
end
def no_optimization
self['CFLAGS']=self['CXXFLAGS'] = SAFE_CFLAGS_FLAGS
end
def libxml2
append_to_cflags ' -I/usr/include/libxml2'
end
def x11
# CPPFLAGS are the C-PreProcessor flags, *not* C++!
append 'CPPFLAGS', '-I/usr/X11R6/include'
append 'LDFLAGS', '-L/usr/X11R6/lib'
end
alias_method :libpng, :x11
# we've seen some packages fail to build when warnings are disabled!
def enable_warnings
remove_from_cflags '-w'
end
# Snow Leopard defines an NCURSES value the opposite of most distros
# See: http://bugs.python.org/issue6848
def ncurses_define
append 'CPPFLAGS', "-DNCURSES_OPAQUE=0"
end
# returns the compiler we're using
def cc
ENV['CC'] or "gcc"
end
def cxx
ENV['cxx'] or "g++"
end
def m64
append_to_cflags '-m64'
ENV.append 'LDFLAGS', '-arch x86_64'
end
def m32
append_to_cflags '-m32'
ENV.append 'LDFLAGS', '-arch i386'
end
# i386 and x86_64 only, no PPC
def universal_binary
append_to_cflags '-arch i386 -arch x86_64'
if self['CFLAGS'].include? '-O4'
# O4 seems to cause the build to fail
remove_from_cflags '-O4'
append_to_cflags '-O3'
end
end
def prepend key, value, separator = ' '
unless self[key].to_s.empty?
self[key] = value + separator + self[key]
else
self[key] = value
end
end
def append key, value, separator = ' '
ref=self[key]
if ref.nil? or ref.empty?
self[key]=value
else
self[key]=ref + separator + value
end
end
def append_to_cflags f
append 'CFLAGS', f
append 'CXXFLAGS', f
end
def remove key, value
return if self[key].nil?
self[key]=self[key].sub value, '' # can't use sub! on ENV
self[key]=nil if self[key].empty? # keep things clean
end
def remove_from_cflags f
remove 'CFLAGS', f
remove 'CXXFLAGS', f
end
end
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