[Gm2] Configure options [Was: Re: gm2 builds as a cross compiler for the avr series of microprocessors on gcc-8.2.0]

[john o goyo]

Gaius,

I am curious about your choice of configuration options (below):

On 27/11/2018 12:24, Gaius Mulley wrote (in part):
> Hello,
>
> I thought I'd mention I have pushed a few patches which allow gm2 to be
> built as a cross compiler for the avr series of microprocessors.
> The script I used to configure and build gm2 is below.  I'll see if I
> can rebuild the gm2-avr debian package for 8.2.0
>
> #/bin/bash
>
> GCC=8.2.0
>
> DIR=/home/gaius/GM2/graft-${GCC}
>
> LANGUAGES=c,c++,gm2
> PREFIX=/usr
> PREFIX=$HOME/opt
>
> if [ -d $DIR ] ; then
> #   if ! ./rebuild-autofiles ; then
> #       echo "failed to reconfigure"
> #       exit 1
> #   fi
>     cd $DIR
>     rm -rf build-avr-${GCC}
>     mkdir build-avr-${GCC}
>     cd build-avr-${GCC}
>     CFLAGS=-g \
>     ../combined/gm2/gcc-versionno/configure \
>      --prefix=${PREFIX}/lib \
>      --libexecdir=${PREFIX}/lib \
>      --infodir=${PREFIX}/share/info \
>      --mandir=${PREFIX}/share/man \
>      --bindir=${PREFIX}/bin \
>      --libdir=${PREFIX}/lib \
>      --enable-shared \
>      --with-system-zlib \
>      --enable-long-long \
Is this recommended for gm2?
>      --enable-nls \
>      --without-included-gettext \
>      --disable-libssp \
>      --build=x86_64-linux-gnu \
>      --host=x86_64-linux-gnu \
>      --enable-languages=c,c++ \
>      --target=avr \
>      --enable-languages=${LANGUAGES} \
Why is this a separate line partly duplicating the above?
>      --enable-checking \
>      --disable-libssp \
>      --disable-bootstrap \
>      --target=avr \
>      --build=x86_64-linux-gnu \
>      --host=x86_64-linux-gnu
>
>      if ! time make ; then
>         echo "build of gcc for the avr failed"
>         exit 1
>      fi
>
>      if ! make install ; then
>         echo "install of gcc for the avr failed"
>         exit 2
>      fi
> else
>     echo "cannot find directory $DIR"
>     exit 1
> fi
>
> hope this is useful,
>
> regards,
> Gaius
As a comparison point, here is my build script on Solaris 10/sparc:

#!/bin/bash
# $Revision: 1.2 $
#
GM2DATE=20181123
GCCVER=8.2.0

export LD_LIBRARY_PATH=/usr/local/lib:/home/build/gcc/$GCCVER/lib
export 
LD_LIBRARY_PATH_64=/usr/local/lib/64:/home/build/gcc/$GCCVER/lib/sparcv9

rm -rf gm2-$GCCVER-$GM2DATE
mkdir gm2-$GCCVER-$GM2DATE
cd gm2-$GCCVER-$GM2DATE

CC=/home/build/gcc/$GCCVER/bin/gcc \
CXX=/home/build/gcc/$GCCVER/bin/g++ \
CFLAGS="-lnsl -lsocket -lpthread -lrt -L/lib" \
LDFLAGS="-lnsl -lsocket -lpthread -lrt -L/lib" \
../../src/gcc-$GCCVER+gm2-$GM2DATE/gm2/gcc-versionno/configure \
--prefix=$HOME/gm2/$GCCVER \
--exec-prefix=$HOME/gm2/$GCCVER \
--without-gnu-ld --with-ld=/usr/ccs/bin/ld \
--without-gnu-as --with-as=/usr/sfw/bin/gas  \
--with-mpc-include=/usr/local/include \
--with-mpc-lib=/usr/local/lib \
--with-mpc-lib=/usr/local/lib/64 \
--with-mpfr-include=/usr/local/include \
--with-mpfr-lib=/usr/local/lib \
--with-mpfr-lib=/usr/local/lib/64 \
--with-gmp-include=/usr/local/include \
--with-gmp-lib=/usr/local/lib \
--with-gmp-lib=/usr/local/lib/64 \
--enable-languages=c,c++,gm2 \
--disable-bootstrap --enable-checking \
--enable-shared --disable-libitm \
--enable-threads=posix

#
# Following needs to be exported for building with gcc-$GCCVER
#
echo .
echo export LD_LIBRARY_PATH=/usr/local/lib:/home/build/gcc/$GCCVER/lib
echo export 
LD_LIBRARY_PATH_64=/usr/local/lib/64:/home/build/gcc/$GCCVER/lib/sparcv9
echo ensure /usr/xpg6/bin:/usr/xpg4/bin is before /usr/bin
echo build with gmake -j4

#[end]

Notus bene: LDFLAGS is not propogated down to the gm2 directories during 
the build so I always
need to add "-lnsl -lpthread -lsocket" after all occurrences of "-lpth" 
in gm2/Make-lang.in.

Sincerely,
john