# gcc641/cfg - "Build" settings for package

#---------------------------------------------------------------------

[technotes]

1. "gcc641" provides an old release of "gcc" (6.4.1).

To use  this release in a package,  specify "compiler = gcc641" in the
package's "cfg" file.

To use  this release to compile  a  'C' program outside of the package
context, try doing this to set up:

      PATH=$PRODTREE/gcc641/bin:$PATH

#---------------------------------------------------------------------

2. Presently,  "gcc641" (gcc 6.4.1) is needed,  and used, to build it-
self.

If you're porting  this distro to a new architecture,  you may be able
to use a different  distro's copy of  "gcc" 6.4.1  to  bootstrap  this
distro's copy.  The details are  beyond the scope of notes at this le-
vel.

#---------------------------------------------------------------------

3. This  release of "gcc" isn't intended  to serve as  the default 'C'
or C++ compiler for this distro.

#---------------------------------------------------------------------

4. The  executables  stored  in  this package's  main  "bin" directory
shouldn't be  compressed (i.e., using "upx" or a similar program).  If
this is done,  the distro's compiler wrapper won't be able  to operate
correctly.

It's also a bad idea to  compress executables stored in this package's
other directories. In theory, this should work.  In  practice, it pro-
duces a slow compiler.

#---------------------------------------------------------------------

[buildtimes]

00.21 hours (or 012.52 minutes) - 2023 dedi Xeon E3-1200 v3  4x2  32GB
                                  RAM
00.21 hours (or 012.78 minutes) - HP EliteBook 8560w 32GB RAM
00.28 hours (or 017.05 minutes) - ThinkPad E540 i7 4x2 16GB RAM
00.28 hours (or 017.05 minutes) - ThinkPad W530 i7 4x2 32GB RAM
00.57 hours (or 034.03 minutes) - ThinkPad W530 i7 4x2 32GB RAM  using
                                  a 64-bit kernel and 32-bit distro

#---------------------------------------------------------------------

[settings]
altpkg     = yes
configure  = none               # Handled during "build" stage
license    = See "license*.txt" in installed tree
licfile    = COPYING
nodebug    = yes
nosyslinks = yes                # Disable normal integration
nowerror   = yes
purge      = no                 # This is a critical package
tmpsize    = 843M
unpack     = relaxed

#---------------------------------------------------------------------

[depends]
actools:forward
bison:forward
chrpath:forward
flex:forward
gawk:forward
grep:forward
none

#---------------------------------------------------------------------

[build]

#---------------------------------------------------------------------
# Initial setup.

GCCTRIPLE=6.4.1
PATH=/glibc64/pkg/gcc641/bin:$PATH

#---------------------------------------------------------------------

if [ "x$LACARCH"    == "x" ]; then
    echo Error: LACARCH not set
    exit 1
fi

if [ "x$LACSYSTREE" == "x" ]; then
    echo Error: LACSYSTREE not set
    exit 1
fi

#---------------------------------------------------------------------

sed -e 's@__META_SYSTREE__@$LACSYSTREE@' \
    -i gcc/cppdefault.c gcc/collect2.c gcc/config/i386/linux64.h

date && echo Start
echo Compiling with:
hash gcc g++
gcc --version

#---------------------------------------------------------------------

rm -fr   /usr/lib64/*.a
mkdir -p /usr/lib64

for x in libc.so libpthread.so
do
    FX=/usr/lib64/$x
    if [ -f $FX ]; then
        echo Error: $FX exists
        exit 1
    fi
done

#---------------------------------------------------------------------

SUPLIB=$PKGDIR_SPECIAL/suplib
tar Jxf $SUPLIB/gmp-6.1.2.tar.xz
tar Jxf $SUPLIB/isl-0.18.tar.xz
tar zxf $SUPLIB/mpc-1.1.0.tar.gz
tar jxf $SUPLIB/mpfr-3.1.6.tar.bz2

mv gmp{-6.1.2,}
mv isl{-0.18,}
mv mpc{-1.1.0,}
mv mpfr{-3.1.6,}

#---------------------------------------------------------------------

# This step is from BFLS and/or Slackware.
#
sed -e '/m64=/s/lib64/lib/' \
    -i gcc/config/i386/t-linux64

# From BLFS:
#
sed -e 's@\./fixinc\.sh@-c true@' \
    -i gcc/Makefile.in

#---------------------------------------------------------------------

treetextsub \
    --pattern="/usr/lib64" \
    --newtext="$LACSYSTREE/lib" --keeptimes

treetextsub \
    --pattern="/usr/lib" \
    --newtext="$LACSYSTREE/lib" --keeptimes

#---------------------------------------------------------------------

BINDIR=$PKGDIR_PROD/bin
LIBDIR=$PKGDIR_PROD/lib
mkdir -p $BINDIR $LIBDIR

#---------------------------------------------------------------------

# The "chown/chmod"  commands  used here are based partly on Slackware
# recommendations.

chown -R 0.0 .
find . -perm 777 -exec chmod 755 {} \;
find . -perm 775 -exec chmod 755 {} \;
find . -perm 754 -exec chmod 755 {} \;

# Skip this one. It's too slow for some releases of gcc.
# find . -perm 664 -print -exec chmod 644 {} \;

#---------------------------------------------------------------------

SDIR=`pwd`
cd ..
mkdir obj
cd    obj
XDIR=`pwd`

#---------------------------------------------------------------------

export FORCEPATHMAX=yes

PREFIX=$PKGDIR_PROD
mkdir -p $PREFIX/lib

export TEMPDIR=/ram
export TMP=$TEMPDIR
export TMPDIR=$TEMPDIR

mkdir -p $TEMPDIR

#---------------------------------------------------------------------
# "configure" step.

export LACNOWERROR=no
PATH=`pwd`:$PATH

bash ../gcc*/configure                \
    --prefix=$PREFIX                  \
    --build=$LACARCHBUILD             \
    --host=$LACARCHHOST               \
\
    --disable-bootstrap               \
    --disable-libgomp                 \
    --disable-libstdcxx-pch           \
    --disable-multilib                \
    --disable-nls                     \
\
    --enable-c99                      \
    --enable-checking=release         \
    --enable-clocale=gnu              \
    --enable-languages=c,c++,fortran  \
    --enable-lto=yes                  \
    --enable-shared                   \
    --enable-static                   \
    --enable-threads=posix            \
    --enable-__cxa_atexit             \
\
    --libexecdir=$PREFIX/lib

#---------------------------------------------------------------------

# Not used under normal circumstances:
#
#   --with-gmp=$PREFIX                \
#   --with-mpc=$PREFIX                \
#   --with-mpfr=$PREFIX               \
#   --with-local-prefix=$PREFIX       \
#   --with-build-sysroot=$PREFIX      \
#   --with-sysroot=$PREFIX            \

#---------------------------------------------------------------------

LACLIBTOOL=`which libtool`
for x in $SDIR $XDIR
do
    cd $x
    for ltfile in `find . -type f -name libtool`
    do
        # These commands may be needed for cross-compilation:
        # rm $ltfile
        # cp -p $LACLIBTOOL $ltfile
        X=42                    # Just a placeholder command
    done
done

#---------------------------------------------------------------------

GLIBCDIR=$LACSYSTREE/toolchain/lib
ALIBCDIR=$PRODTREE/glibc/lib

if [ -f "$ALIBCDIR/crti.o" ]; then
    GLIBCDIR=$ALIBCDIR
fi
if [ \! -f "$GLIBCDIR/crti.o" ]; then
    echo "Error: glibc crtX.o setup isn't as expected"
    exit 1
fi

pushd $GLIBCDIR
for x in /lib /usr/lib /usr/local/lib $LACSYSTREE/lib
do
    mkdir -p $x
    for crto in *crt*.o
    do
        ln -nsf $GLIBCDIR/$crto $x/
    done
done
popd

#---------------------------------------------------------------------

cd /
sync

#---------------------------------------------------------------------

date && echo 1st make start
cd $XDIR
export LACSLOWDOWN=no
smpmake || smpmake || make
date && echo 1st make done

#---------------------------------------------------------------------
# "make install" step.

date && echo make install start
make install || make install || make install
date && echo make install done

for x in /lib /usr/lib /usr/local/lib $LACSYSTREE/lib
do
    rm -f $x/crt*.o
done

#---------------------------------------------------------------------

date && echo Post-install cleanup

install -v -dm755 $LACSYSTREE/lib/bfd-plugins
ln -sfv \
../../libexec/gcc/$(gcc -dumpmachine)/$GCCTRIPLE/liblto_plugin.so \
$LACSYSTREE/lib/bfd-plugins/

#---------------------------------------------------------------------

cd $BINDIR
(strip -p * || true) 2> /dev/null
rm -fr cc wrapcc

sed -e "s@__META_SYSTREE__@$LACSYSTREE@g" \
    -e "s@__META_PKGNAME__@$EXEWORD@g" \
        < $PKGDIR_SPECIAL/altcc \
        > cc
chmod 755 cc

sed -e "s@__META_LACARCH__@$LACARCH@g" \
        < /laclin/sysutil/toolchain/wrapcc.txt \
        > wrapcc
chmod 755 wrapcc

#---------------------------------------------------------------------

# The "for"-loop below tries to do the following:
#
# (1) rename 'C' compiler ELF executables that are not  already  named
#     "*.bin" to corresponding "*.bin" names
#
# (2) hard-link  the original 'C' compiler executable names to a wrap-
#     per script that was installed previously

# "trueifexe" is a distro-specific utility script.

echo trueifexe loop start
for x in c++ g++ gcc *-c++ *-g++ *-gcc *-gcc-[0-9.]*
do
    if [ -f "$x.bin" ]; then
        trueifexe "$x.bin" || (echo trueifexe error-1: $x ; exit 1)
    fi

    z=`echo $x | sed 's/\.bin//'`
    if [ "@$x" == "@$z" ]; then  # Doesn't end with ".bin"
        trueifexe $x && rm -fr $x.bin && mv $x $x.bin
        ln -f wrapcc $x
        trueifexe "$x.bin" || (echo trueifexe error-2: $x ; exit 1)
    else
        trueifexe "$x" || (echo trueifexe error-3: $x ; exit 1)
    fi
done
echo trueifexe loop end

#---------------------------------------------------------------------

rm -f $LIBDIR/libstdc++.so.*-gdb.py

#---------------------------------------------------------------------

# This is needed by some programs. It may need some work.

cd $PREFIX
sed -e 's|#include_next|#include|' \
    -i `find . -type f -name cstdlib`  \
       `find . -type f -name cmath`    \
       `find . -type f -name std_abs.h`

rm -fr `find . -type d -name include-fixed`

#---------------------------------------------------------------------
# Wrap it up.

date && echo Done

#---------------------------------------------------------------------

# Original URLs. These URLs were valid at one point, but may have died
# since then. If you download newer versions of tarballs [etc.], don't
# delete  the  original versions,  as you may not  be able  to replace
# them.

[urls]
url_debian  = tbd
url_home    = http://www.gnu.org/software/gcc/
url_tarball = n/a

url_lfs     = http://www.linuxfromscratch.org/lfs/view/\
stable/chapter06/gcc.html

#---------------------------------------------------------------------

[history]
180623 Added package. Started with 6.4.1.