I think it might be time to get ready for the imminent release of gcc-4.
The key thing that needs to be fixed in the (unstable) book is the
management of gcc's specs.
I've learnt quite a bit about this from Greg Shafer's scripts, and
attached you'll find a somewhat LFS-ised set of instructions with my
comments on how the method works. There isn't any rocket science here,
but a handy listing of Gcc's man page is helpful in understanding this -
and it works fine with gcc-3 too. The section entitled 'Options for
Debugging Your Program or GCC' is the relevant bit.
I'm also attracted to Greg's method of carrying binutils information
forward. I like it most because it removes that newbie confusion over
'shall I delete the sources?'. This is worth incorporating just for itself.
Of course, we could start lfs-hackers again... ;-)
# Greg's environment variables
LC_ALL=POSIX
LDFLAGS=-s
PATH=/tools/bin:/bin:/usr/bin # Make sure /tools/bin comes first during
# the toolchain build, replacing the host's.
TZ='Europe/London' # the right timezone
CONFIG_SITE=${HOME}/config.site # this obviates the need for many
# --prefix=/usr - where the gnu-autotools
# have been properly used.
cat ~/config.site EOF
test $prefix = NONE prefix=/tools
test -z $CFLAGS CFLAGS=-O2 -pipe
test -z $CXXFLAGS CXXFLAGS=${CFLAGS}
enable_nls=no
EOF
# Greg builds copies of bash, make and sed to be certain that all
the scripts work even if the host-distro is quite odd/old.
# Binutils pass1
#--
mkdir ../binutils-build
cd ../binutils-build
../binutils-2*/configure
make LDFLAGS=${LDFLAGS}
make install
make -C ld clean
make -C ld \
LDFLAGS=${LDFLAGS} \
LIB_PATH=/tools/lib
cp -v ld/ld-new /tools/bin
# Comments: Binutils takes note of the site config file to pick up the prefix.
#The cp saves a copy of ld/ld-new for the toolchain adjustment, so
#that we can delete the binutils files now. This avoids a lot of
#newbie confusion!
# Gcc-4.x pass1
#--
sed -i.bak \
'/^LIBGCC2_DEBUG/d' gcc/Makefile.in
mkdir ../gcc-build
cd ../gcc-build
../gcc-4*/configure \
--with-local-prefix=/tools \
--disable-shared \
--enable-languages=c \
--with-ld=/tools/bin/ld \
--with-as=/tools/bin/as
make \
BOOT_LDFLAGS=${LDFLAGS} \
BOOT_CFLAGS=-O2 -pipe \
STAGE1_CFLAGS=-pipe \
LDFLAGS=${LDFLAGS} \
bootstrap
make install
ln -sv gcc /tools/bin/cc
# Comments: --with-local-prefix puts the compiler in the tools dir.
#--with-ld and --with-as pick up the right linker and assembler
#to use from where we put them when we built binutils.
#I guess the sed just stops gcc building debug facilities,
#probably to speed up the build?
# Linux-Libc-Headers
#
cp -Rv include/asm-i386 /tools/include/asm
cp -Rv include/linux /tools/include
# Glibc-2.3.X
#
mkdir ../glibc-build
cd ../glibc-build
../glibc-2.3.*/configure \
--disable-profile \
--enable-add-ons \
--with-binutils=/tools/bin \
--with-headers=/tools/include \
--without-selinux
make \
AUTOCONF=no \
libgcc_eh= \
static-gnulib=-lgcc
make install
# Comments: Few surprises here. I need to understand the make parameters.
# Adjust Toolchain
#-
M=`gcc -dumpmachine`
cp -pv /tools/bin/ld-new /tools/bin/ld
cp -pv /tools/bin/ld-new /tools/${M}/bin/ld
# Comments: This is the equivalent of 'make -C ld install' in LFS,
# but it's neater, since the sources don't hang about.
# ${M} is the host triple e.g. i686-pc-linux-gnu.
gcc -dumpspecs | sed \
s,/lib/ld-linux.so.2,/tools, \
`gcc -print-search-dirs | head -n 1 | awk '{ print $2 }'`specs
# Comments: This finds all the /lib/ld-linux.so.2 occurances in the dump of
#the specs, and replaces them with /tools/lib/... overwriting
#the file 'specs' in gcc's installation directory.
I=`gcc -print-file-name=include`
rm -rfv ${I}/*
J=`gcc -print-file-name=install-tools`
cp -pv ${J}/include/* ${I}
cp -pv ${J}/gsyslimits.h ${I}/syslimits.h
# Comments: ${I} is the absolute name of the library dir 'include' that gcc
#would use when linking. ${J} is the same for 'install-tools'.
#So the script deletes the current contents of the 'include' dir,
#and copies the 'install-tools' version there instead.
echo 'main(){}' | cc -x c -
readelf -l a.out | grep : /tools
rm -fv a.out
# Comments: This is just the check that the specs have been adjusted OK.
# GCC-4.x Pass 2
#-
sed -i.bak \
s@/lib/[EMAIL PROTECTED]/tools@ gcc/config/i386/linux.h
echo
/* Remove /usr/include from end of include search path.
