#!/bin/sh
# Build the vendored QuickJS interpreter (`qjs`) for the JS test harness
# (tests/markdown/run.sh). Only the 8 C files the interpreter needs are
# vendored, so we compile them directly rather than driving upstream's
# Makefile (whose default target also builds qjsc, run-test262, examples
# and a qjsc-generated repl.c rule we have no sources for).
#
# The build is skipped when a system `qjs` is already available; set
# FORCE_BUILD_QJS=1 to build anyway.
set -e
cd "$(dirname "$0")"

if command -v qjs >/dev/null 2>&1 && [ -z "$FORCE_BUILD_QJS" ]; then
  echo "[qjs] using system qjs: $(command -v qjs)"
  exit 0
fi

VERSION=$(cat VERSION)
# The quotes are consumed by the shell: gcc ends up seeing the macro value
# wrapped in literal double quotes, i.e. a valid C string literal.
VERDEF='-DCONFIG_VERSION="'"$VERSION"'"'
CFLAGS="-g -Wall -Wno-array-bounds -Wno-format-truncation -Wno-infinite-recursion -fwrapv -D_GNU_SOURCE $VERDEF -DHAVE_CLOSEFROM -O2"
OBJS="quickjs dtoa libregexp libunicode cutils quickjs-libc qjs repl"

rm -rf .obj
mkdir -p .obj
for base in $OBJS; do
  echo "[qjs] CC $base.c"
  gcc $CFLAGS -c -o ".obj/$base.o" "$base.c"
done
echo "[qjs] LD qjs"
gcc -rdynamic -o qjs $(for base in $OBJS; do echo ".obj/$base.o"; done) -lm -lpthread -ldl
echo "[qjs] built $(pwd)/qjs"