GCC

BIG FAT WARNING!

You are about to over-write your currently installed GCC. If you have ANY doubts that this may fail. Do not continue. Also, Do not continue with make install unless you are 100% confident that your build was successful!

Download Source:	http://ftp.gnu.org/gnu/gcc/gcc-4.1.1/gcc-4.1.1.tar.bz2
Download Patch:	http://svn.cross-lfs.org/svn/repos/cross-lfs/trunk/patches/gcc-4.1.1-PR20425-1.patch

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An Ada compiler is not built on this page.

Introduction to GCC

The GCC package contains GNU compilers. This package is useful for compiling programs written in C, C++, Fortran, Java, Objective C and Ada. Also included is GNU Treelang. Treelang is a sample language, useful only to help people understand how to implement a new language front end to GCC. It is not a useful language in itself other than as an example or basis for building a new language. Therefore only language developers are likely to have an interest in it.

Note:
The Fortran compiler included with the GCC-4.x package now aims to be conformant with the Fortran 95
standard, not the Fortran 77 standard as all previous versions of GCC have been. Please note the
following paragraph copied directly from the GCC-4.0.3 gfortran man page.

“Gfortran is not yet a fully conformant Fortran 95 compiler. It can generate code for most constructs
and expressions, but work remains to be done. In particular, there are known deficiencies with ENTRY,
NAMELIST, and sophisticated use of MODULES, POINTERS and DERIVED TYPES. For those whose Fortran codes
conform to either the Fortran 77 standard or the GNU Fortran 77 language, we recommend to use g77
from GCC 3.4.x”

(Non-Multilib) Instructions to install the 3.4.6 version of the Fortran compiler can be found on
the BLFS Wiki.

Dependencies

Recommended

• DejaGnu

Optional (Required to Build the Fortran Compiler)

• GMP
• MPFR

Optional (Java's Classpath Library Can Use)

• LibXML2
• LibXSLT
• Gtk2
• cairo
• Pango
• Qt3
• Qt4
• ALSA

Non-Multilib

Write-Me!

Multilib

The following patch fixes the searching of multilib dirs for specs file. The patch standardizes the gcc drivers path iteration functions, ensuring multilib directories are searched in the correct order. This fixes various issues, most noticably with libtool on multilib systems:

patch -Np1 -i ../gcc-4.1.1-PR20425-1.patch

Suppress the installation of libiberty.a. The version of libiberty.a provided by Binutils will be used instead:

sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in

Create the Build Directory:

mkdir -v ../gcc-build &&
cd ../gcc-build

Configure GCC:

export PKG_CONFIG_PATH="${PKG_CONFIG_PATH64}" &&
../gcc-4.1.1/configure --prefix=/usr --libdir=/usr/lib64 \
    --libexecdir=/usr/lib64 --enable-shraed --enable-threads=posix \
    --enable-__cxa_atexit --enable-c99 --enable-long-long \
    --enable-clocale=gnu --disable-libstdcxx-pch --enable-multilib \
    --enable-languages=c,c++,objc,f95,java,treelang

Compile GCC:

make bootstrap &&
unset PKG_CONFIG_PATH

Test the Results, But do not stop at errors:

make -k check

The -k flag is used to make the test suite run through to completion and not stop at the first failure. The GCC test suite is very comprehensive and is almost guaranteed to generate a few failures. To receive a summary of the test suite results, run:

../gcc-4.1.1/contrib/test_summary

• For only the summaries, pipe the output through grep -A7 Summ.

At this time only proceed if you are 100% positive that you have built a sane compiler.

Install GCC:

make install &&
ln -sfv ../usr/bin/cpp /lib &&
ln -sfv gcc /usr/bin/cc &&
chown -Rv root:root /usr/lib64/gcc/$(gcc -dumpmachine)/4.1.1/include &&
chown -Rv root:root /usr/lib64/gcc/$(gcc -dumpmachine)/4.1.1/ada{lib,include}

The libffi interface header is installed in a location where other packages will not be able to find it. If you included Java as one of the installed languages, create a symbolic link in /usr/include to remedy this:

ln -sfv `find /usr/lib64/gcc -name ffitarget.h` /usr/include