View the most recent changes for the gcc41 port at: gcc41.darwinports.com/diff
Scroll down toward the bottom of the page to get installation instructions for gcc41.
The raw portfile for gcc41 4.1.2 is located here:
http://gcc41.darwinports.com/dports/lang/gcc41/Portfile
Find related portfiles with the unique DarwinPorts.com search feature.
Check for any related Fink projects here: pdb.finkproject.org/pdb/package.php/gcc41

The gcc41 Portfile 57658 2009-09-14 16:45:14Z jmr macports.org $

PortSystem 1.0

Name: gcc41
Version: 4.1.2
Revision: 4
Platform: darwin
Category: lang
Maintainers: mww
license GPLv2
Description: The GNU compiler collection
Long Description: The GNU compiler collection, including front ends for C, C++, Objective-C, Objective-C++, Java and Fortran95.

Homepage: http://gcc.gnu.org/
Master Sites: ftp://ftp.funet.fi/pub/mirrors/sources.redhat.com/pub/gcc/releases/gcc-${version}/ ftp://ftp.nluug.nl/mirror/languages/gcc/releases/gcc-${version}/ ftp://ftp.gwdg.de/pub/linux/gcc/releases/gcc-${version}/ ftp://gcc.gnu.org/pub/gcc/releases/gcc-${version}/ gnu:/gcc/gcc-${version}

set dcore gcc-core-${version}.tar.bz2
set dfort gcc-fortran-${version}.tar.bz2
set dcxx gcc-g++-${version}.tar.bz2
set djava gcc-java-${version}.tar.bz2
set dobjc gcc-objc-${version}.tar.bz2
distfiles ${dcore} ${dfort} ${dcxx} ${djava} ${dobjc}

Checksums: ${dcore} sha1 d6875295f6df1bec4a6f4ab8f0da54bfb8d97306 ${dfort} sha1 827ca3cba74ca50b2129fa707354af2ee1123d5d ${dcxx} sha1 e29c6e151050f8b5ac5d680b99483df522606143 ${djava} sha1 e83838428b83a6aa76ee6d8b3db1cbd4fdc383bc ${dobjc} sha1 ea97dab0f7096d267eba17d53a861d15b519868a

# Handle Texinfo 4.1x.
Patch Files: patch-configure-texinfo.diff

# gmp and mpfr are not universal
universal_variant no

use_bzip2 yes

depends_lib port:gmp port:mpfr port:libiconv

set major 4.1

worksrcdir build

pre-patch {
file mkdir ${worksrcpath}
}
patch.dir ${workpath}/gcc-${version}

# the generated compiler doesn't accept -arch
if {[info exists build_arch] && ${os.platform} == "darwin"} {
configure.cc_archflags
configure.cxx_archflags
configure.objc_archflags
configure.pre_args-append --build=${build_arch}-apple-darwin${os.major}
}

configure.cmd ../gcc-${version}/configure
configure.args --enable-languages=c,c++,objc,obj-c++,fortran,java --libdir=${prefix}/lib/${name} --includedir=${prefix}/include/${name} --infodir=${prefix}/share/info --mandir=${prefix}/share/man --with-local-prefix=${prefix} --with-system-zlib --disable-multilib --disable-nls --program-suffix=-mp-${major} --with-gxx-include-dir=${prefix}/include/${name}/c++/ --with-gmp=${prefix} --with-mpfr=${prefix}

use_parallel_build yes
build.target profiledbootstrap

post-destroot {
file delete -force ${destroot}${prefix}/share/man/man7
file delete -force ${destroot}${prefix}/share/info
foreach b { c++ cpp fastjar g++ gcc gccbug gcj gcjh gcov gfortran gjnih grepjar } {
system "cd ${destroot}${prefix}/bin && ln -s ${b}-mp-4.1 ${b}-dp-4.1"
}
# install/copy ffitarget.h only if we have it
if {![catch {set ffitarget.h [glob ${destroot}${prefix}/lib/${name}/gcc/*/${version}/include/ffitarget.h]} result]} {
file copy ${ffitarget.h} ${destroot}${prefix}/include/${name}/
}

xinstall -m 755 -d ${destroot}${prefix}/etc/select/gcc
xinstall -m 444 ${filespath}/mp-gcc41 ${destroot}${prefix}/etc/select/gcc/
}

platform darwin 9 {
patchfiles-append patch-make-exports.pl-leopard.diff
# Workaround for libiconv on Mac OS X 10.5 Leopard: force configure
# to look for the system's library, not the MacPort's one.
configure.args-append --with-libiconv-prefix=/usr
}

platform darwin i386 {
patchfiles-append patch-darwin.h.diff
}

Variant: odcctools {
depends_lib-append bin:odas:odcctools
patch {
reinplace "s|/usr/bin/libtool|${prefix}/bin/odlibtool|g" ${workpath}/gcc-${version}/gcc/config/darwin.h
}
configure.args-append --with-as=${prefix}/bin/odas --with-ld=${prefix}/bin/odld --with-ar=${prefix}/bin/odar
}

livecheck.type regex
livecheck.url http://gcc.gnu.org/gcc-4.1/
livecheck.regex GCC (4\\.1\\.\[0-9\])

If you haven't already installed Darwin Ports, you can find easy instructions for doing so at the main Darwin Ports page.
Once Darwin Ports has been installed, in a terminal window and while online, type the following and hit return:

%  cd /opt/local/bin/portslocation/dports/gcc41
%  sudo port install gcc41  
Password: 

You will then be prompted for your root password, which you should enter. You may have to wait for a few minutes while the software is retrieved from the network and installed for you. Y ou should see something that looks similar to:

--->  Fetching gcc41
--->  Verifying checksum for gcc41
--->  Extracting gcc41
--->  Configuring gcc41
--->  Building gcc41 with target all

--->  Staging gcc41 into destroot

--->  Installing gcc41

- Make sure that you do not close the terminal window while Darwin Ports is working. Once the software has been installed, you can find further information about using gcc41 with these commands:

%  man gcc41
%  apropos gcc41
%  which gcc41
%  locate gcc41

 Where to find more information: