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require 'formula'
# todo: Use graphite loop optimizations? (would depends_on 'cloog')
class Gfortran < Formula
homepage 'http://gcc.gnu.org/wiki/GFortran'
url 'http://ftpmirror.gnu.org/gcc/gcc-4.7.2/gcc-4.7.2.tar.bz2'
mirror 'http://ftp.gnu.org/gnu/gcc/gcc-4.7.2/gcc-4.7.2.tar.bz2'
sha1 'a464ba0f26eef24c29bcd1e7489421117fb9ee35'
bottle do
sha1 '684879d100c02ac9ba5c23ded4860da19c02650d' => :mountainlion
sha1 '3d958ffe0f126d1add6e2f5236b333870b1a826b' => :lion
sha1 '9708ac5fa35db9789b8e050fbe410acee9ec9e45' => :snowleopard
end
option 'enable-profiled-build', 'Make use of profile guided optimization when bootstrapping GCC'
option 'check', 'Run the make check fortran. This is for maintainers.'
depends_on 'gmp'
depends_on 'libmpc'
depends_on 'mpfr'
# http://gcc.gnu.org/install/test.html
depends_on 'dejagnu' if build.include? 'check'
fails_with :clang do
build 421
cause <<-EOS.undent
"fatal error: error in backend: ran out of registers during register allocation"
If you have any knowledge to share or can provide a fix, please open an issue.
Thanks!
EOS
end
def install
# Sandbox the GCC lib, libexec and include directories so they don't wander
# around telling small children there is no Santa Claus. This results in a
# partially keg-only brew following suggestions outlined in the "How to
# install multiple versions of GCC" section of the GCC FAQ:
# http://gcc.gnu.org/faq.html#multiple
gfortran_prefix = prefix/'gfortran'
args = [
# Sandbox everything...
"--prefix=#{gfortran_prefix}",
# ...except the stuff in share...
"--datarootdir=#{share}",
# ...and the binaries...
"--bindir=#{bin}",
"--with-system-zlib",
# ...opt_prefix survives upgrades and works even if `brew unlink gmp`
"--with-gmp=#{Formula.factory('gmp').opt_prefix}",
"--with-mpfr=#{Formula.factory('mpfr').opt_prefix}",
"--with-mpc=#{Formula.factory('libmpc').opt_prefix}",
# ...we build the stage 1 gcc with clang (which is know to fail checks)
"--enable-checking=release",
"--disable-stage1-checking",
# ...speed up build by ignoring cxx
"--disable-build-poststage1-with-cxx",
"--disable-libstdcxx-pc",
# ...disable translations avoid conflict with brew install gcc --enable-nls
'--disable-nls'
]
mkdir 'build' do
unless MacOS::CLT.installed?
# For Xcode-only systems, we need to tell the sysroot path.
# 'native-system-header's will be appended
args << "--with-native-system-header-dir=/usr/include"
args << "--with-sysroot=#{MacOS.sdk_path}"
end
system '../configure', "--enable-languages=fortran", *args
if build.include? 'enable-profiled-build'
# Takes longer to build, may bug out. Provided for those who want to
# optimise all the way to 11.
system 'make profiledbootstrap'
else
system 'make bootstrap'
end
system "make"
system "make check-fortran" if build.include? 'check'
system 'make install'
end
# This package installs a whole GCC suite. Removing non-fortran components:
bin.children.reject{ |p| p.basename.to_s.match(/gfortran/) }.each{ |p| rm p }
man1.children.reject{ |p| p.basename.to_s.match(/gfortran/) }.each{ |p| rm p }
man7.rmtree # dupes: fsf fundraising and gpl will be added by gcc formula
# (share/'locale').rmtree
end
test do
fixture = <<-EOS.undent
integer,parameter::m=10000
real::a(m), b(m)
real::fact=0.5
do concurrent (i=1:m)
a(i) = a(i) + fact*b(i)
end do
print *, "done"
end
EOS
Pathname('in.f90').write(fixture)
system "#{bin}/gfortran -c in.f90"
system "#{bin}/gfortran -o test in.o"
`./test`.strip =='done'
end
def caveats; <<-EOS.undent
Brews that require a Fortran compiler should not use:
depends_on 'gfortran'
The preferred method of declaring Fortran support is to use:
def install
...
ENV.fortran
...
end
EOS
end
end
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