#!/bin/sh
# Build as34 (assembler), ld34 (linker) and dis34 (disassembler) from Andrew
# Morton's gsptools, patched to build on a 64-bit Linux host.
#
# Everything is fetched/built under tools/as34/build (override with
# AS34_BUILD_DIR) so the repository tree stays clean.
#
# The upstream tarball is an UNCOMPRESSED tar with a .tar.gz name; that is
# how the Wayback Machine archived it.
set -eu

here=$(cd "$(dirname "$0")" && pwd)
builddir=${AS34_BUILD_DIR:-"$here/build"}
tarball="$builddir/gsp.tar.gz"
srcdir="$builddir/src"
treesrc="$srcdir/gsp/binutils"

TARBALL_SHA256=efff8e59f7e3bf0285c4bd44d63e2357d6c26a85d939d4843d6be3471af9ef46
TARBALL_URL="https://web.archive.org/web/20070206220404if_/http://www.zip.com.au/~akpm/gsp.tar.gz"

mkdir -p "$builddir"

if [ ! -f "$tarball" ]; then
	echo "fetching $tarball"
	curl -fL --max-time 300 -o "$tarball" "$TARBALL_URL"
fi

echo "$TARBALL_SHA256  $tarball" | sha256sum -c -

if [ ! -d "$treesrc" ]; then
	mkdir -p "$srcdir"
	tar xf "$tarball" -C "$srcdir"
fi

if [ ! -f "$srcdir/.patched" ]; then
	patch -p1 -d "$srcdir/gsp" < "$here/as34-port.patch"
	touch "$srcdir/.patched"
fi

# -std=gnu17: C23 removed K&R definitions, which this 1998 code uses.
# -fcommon:   the sources rely on tentative definitions being merged.
# as34 needs -DBISON to select the flex/bison input path in as.l.
CC_BASE="gcc -std=gnu17 -O2 -fcommon \
	-Wno-implicit-function-declaration -Wno-int-conversion \
	-Wno-incompatible-pointer-types -Wno-builtin-declaration-mismatch \
	-Wno-implicit-int -Wno-return-mismatch -Wno-format -Wno-unused-result"

echo "building as34"
make -C "$treesrc/as34" clean >/dev/null 2>&1 || true
make -C "$treesrc/as34" \
	CC="$CC_BASE -DBISON" \
	XCFLAGS="-include $here/proto.h"

echo "building ld34 and dis34"
make -C "$treesrc/ld34" clean >/dev/null 2>&1 || true
make -C "$treesrc/ld34" ld34 CC="$CC_BASE"
make -C "$treesrc/ld34" dis34 CC="$CC_BASE"

echo
echo "built:"
ls -l "$treesrc/as34/as34" "$treesrc/ld34/ld34" "$treesrc/ld34/dis34"