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Merge pull request #2119 from ghaerr/ecc
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[tools] Add 'ecc' ELKS C86 compiler driver script
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ghaerr authored Nov 29, 2024
2 parents eb097d3 + 08f03dd commit 0fbe1d2
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81 changes: 81 additions & 0 deletions elks/tools/bin/ecc
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# ecc - ELKS cc compiler wrapper for C86 (8086-toolchain)
#
# This script runs cpp86, c86, nasm and ld86 on the input file.
# The input file must be specified without its .c extension for now,
# and the script must be run in the 8086-toolchain/ directory,
# as it also builds the libc86.a C86 library.
# This restriction will be removed shortly.
#
# Usage: to compile and link foo.c:
# cd 8086-toolchain
# ecc foo
#
# Before using, modify the full paths below to ELKS and C86:

#####################################################################

# Full path to ELKS and C86 installations
export TOPDIR=/Users/greg/net/elks-gh
export C86DIR=/Users/greg/net/8086-toolchain

# OpenWatcom path, not yet necessary to have installed
export WATCOM=/Users/greg/net/open-watcom-v2/rel

#####################################################################

set -e

add_path () {
if [[ ":$PATH:" != *":$1:"* ]]; then
export PATH="$1:$PATH"
fi
}

# ia16-elf-gcc
export MAKEFLAGS="$MAKEFLAGS"
add_path "$TOPDIR/cross/bin"
add_path "$TOPDIR/elks/tools/bin"

# OpenWatcom
#add_path "$WATCOM/binl" # for Linux-32
#add_path "$WATCOM/binl64" # for Linux-64
#add_path "$WATCOM/bino64" # for macOS

#echo PATH set to $PATH

# C86
add_path "$C86DIR/host-bin"

INCLUDES="-I$TOPDIR/libc/include -I$TOPDIR/elks/include"
DEFINES="-D__C86__ -Drestrict="
C86FLAGS="-O -warn=4 -lang=c99 -align=yes -stackopt=minimum -peep=all -stackcheck=no"
CPPFLAGS="$INCLUDES $DEFINES"
CFLAGS="$C86FLAGS"
ASFLAGS="-f as86"
ARFLAGS="q"
LDFLAGS="-0 -i"

# preprocessor
echo cpp86 $CPPFLAGS $1.c $1.i
cpp86 $CPPFLAGS $1.c -o $1.i

# C compiler
echo c86 $CFLAGS $1.c $1.asm
c86 $CFLAGS $1.i $1.asm

# assembler
echo nasm $ASFLAGS -l $1.lst -o $1.o $1.asm
nasm $ASFLAGS -l $1.lst -o $1.o $1.asm
objdump86 -s $1.o

# create libc86.a
nasm $ASFLAGS lib/c86lib.asm -o c86lib.o
nasm $ASFLAGS lib/syscall.asm -o syscall.o
rm -f libc86.a
echo ar86 $ARFLAGS libc86.a c86lib.o syscall.o
ar86 $ARFLAGS libc86.a c86lib.o syscall.o

# link executable
echo ld86 $LDFLAGS $1.o -o $1 -lc86
ld86 $LDFLAGS $1.o -o $1 -lc86
objdump86 -s $1

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