Arch Linux

gcc-g77 can compile the program without error but when I try to run it, the hard drive starts acting up thus slowing the computer. According to gkrellm, MBs of data are written to the hard drive. It is definitely not due to my small program. And, I'm pretty sure that it is not due to any background task. I also tried with a different program with same results.
If I use my version of gcc-g77 or the Intel compiler, the programs are compiled and executed in less than 5 seconds.
Here is a working PKGBUILD:
#===================
pkgname=gcc-g77
pkgver=3.4.3
pkgrel=1
pkgdesc="The GNU Fortran Compiler"
url="http://gcc.gnu.org"
depends=('glibc' 'gcc=3.4.3')
makedepends=('sed')
source=(ftp://gcc.gnu.org/pub/gcc/releases/gcc-$pkgver/gcc-$pkgver.tar.bz2)
md5sums=('e744b30c834360fccac41eb7269a3011')

build() {
cd $startdir/src/gcc-$pkgver
# changing maximum number of file unit
sed -i 's/#define MXUNIT 100/#define MXUNIT 1000/' libf2c/libI77/fio.h
mkdir ../gcc-build
cd ../gcc-build
../gcc-$pkgver/configure --prefix=/usr \
--enable-shared \
--enable-languages=f77 \
--enable-threads=posix \
--enable-__cxa_atexit
make bootstrap || return 1
make DESTDIR=$startdir/pkg install || return 1
mkdir -p $startdir/pkg/lib

# get rid of the references to my build dir
chmod 644 $startdir/pkg/usr/lib/*.la

# removing files provided by gcc
rm -r $startdir/pkg/usr/lib/{libgcc_s.so*,libiberty.a}
rm $startdir/pkg/usr/lib/gcc/i686-pc-linux-gnu/$pkgver/{*.o,*.a,specs}
rm $startdir/pkg/usr/lib/gcc/i686-pc-linux-gnu/$pkgver/include/{README,emmintrin.h,float.h,iso646.h,limits.h,mmintrin.h,pmmintrin.h,s*,unwind.h,varargs.h,xmmintrin.h,dbm/ncompat.h}
rm $startdir/pkg/usr/lib/gcc/i686-pc-linux-gnu/$pkgver/install-tools/*
rm -r $startdir/pkg/usr/lib/gcc/i686-pc-linux-gnu/$pkgver/install-tools/include/*
rm -r $startdir/pkg/usr/share/locale/{be,ca,da,de,el,es,fr,ja,nl,sv,tr}/LC_MESSAGES/*
rm -r $startdir/pkg/usr/libexec/gcc/i686-pc-linux-gnu/$pkgver/install-tools/*
rm -r $startdir/pkg/usr/libexec/gcc/i686-pc-linux-gnu/$pkgver/c*
rm $startdir/pkg/usr/bin/{cpp,gcc,gccbug,gcov,i686*}
rm $startdir/pkg/usr/man/man1/{gc*,cpp.1}
rm $startdir/pkg/usr/man/man7/*

}
#==================
The main differences with the one from Arch CVS are:
1. The use of the gcc-core-$pkgver.tar.bz2 sources (reason=?)
2. The official PKGBUILD compiles with:
make || return 1
while the working PKGBUILD compiles with:
make bootstrap || return 1

That might be the problem.