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# $Id: linker.sh,v 1.3 2007/07/17 15:25:14 fgilham Exp $
# This file was written by Fred Gilham and is placed in the public domain.
# It comes without warranty of any kind.
PATH=/bin:/usr/bin:/usr/local/bin
GCC=`which gcc`
if [ -z "$GCC" ]
then
echo 'Cannot find GCC. How did you build lisp?'
exit 1
fi
# Uniform method for finding GCC C runtime object files suggested by Ray Toy
CRTPATH=`$GCC -print-libgcc-file-name`
LIBROOT=`dirname $CRTPATH`
echo "LIBROOT is $LIBROOT"
if [ $# -ne 2 ]
then
echo "Usage: `basename $0` <initial function address> <executable file>"
exit 1
fi
OPSYS=`uname`
VER=''
# Set OS-specific variables.
DLINKER='-dynamic-linker /lib/ld-linux.so.2'
STARTCRT="$LIBROOT/../../../crt1.o $LIBROOT/../../../crti.o $LIBROOT/crtbegin.o"
ENDCRT="$LIBROOT/crtend.o $LIBROOT/../../../crtn.o"
LIBS="-L$LIBROOT -ldl -lm -lgcc -lc -lgcc"
;;
FreeBSD )
DLINKER='-dynamic-linker /usr/libexec/ld-elf.so.1'
STARTCRT="$LIBROOT/crt1.o $LIBROOT/crti.o $LIBROOT/crtbegin.o"
ENDCRT="$LIBROOT/crtend.o $LIBROOT/crtn.o"
LIBS='-lm -lgcc -lc -lgcc'
;;
* )
echo "$0: unknown operating system $OPSYS."
exit 1
;;
esac
OUTPUT="-o $2"
LINKER=/usr/bin/ld
CMUCLLIB=`dirname $0`
OBJS="--whole-archive $CMUCLLIB/lisp.a --no-whole-archive"
FLAGS='-export-dynamic'
SCRIPT="-T $CMUCLLIB/$OPSYS$VER-cmucl-linker-script"
# This is a hack.
# BIFLAG flags the executable as having a builtin lisp image. It should be
# a valid address because it will be dereferenced. It should also not point
# to an integer 0 because that would make the flag false. We use the first
# address in the process memory image, which should point to the ELF header.
# XXXX The process image start address can change depending on the OS
# (at least).
BIFLAG='--defsym builtin_image_flag=0x08048000'
# IFADDR is the initial function address, needed to start lisp processing.
IFADDR="--defsym initial_function_addr=$1"
$LINKER $SCRIPT $DLINKER $OUTPUT $STARTCRT $FLAGS $BIFLAG $IFADDR $OBJS $LIBS $ENDCRT