configure

#!/bin/sh
set -e

generate_ninja () {
  echo -n > build.ninja
  
cat << EOF >> build.ninja
rule cc
  command = $CC -c \$in -O2 -Wall -Werror -Iliblpe -MD -MF \$out.d -o \$out
  depfile = \$out.d
  description = Compiling C object \$out

rule ar
  command = $AR rcs \$out \$in
  description = Creating library \$out

rule ld
EOF
  
  if [ "$1" = "wasm32" ]; then
cat << EOF >> build.ninja
  command = $WASM_LD \$in -s --no-entry --export-all --allow-undefined -Llib -llpe -o \$out
EOF
  else
cat << EOF >> build.ninja
  command = $CC \$in -s -Llib -llpe -o \$out
EOF
  fi
  
cat << EOF >> build.ninja
  description = Linking executable \$out

rule install
  command = install \$in \$out
  description = Installing \$out

build build/liblpe/liblpe.o: cc liblpe/liblpe.c
build lib/liblpe.a: ar build/liblpe/liblpe.o
build liblpe: phony lib/liblpe.a

EOF
  
  if [ "$1" != "wasm32" ]; then
cat << EOF >> build.ninja
build $PREFIX/lib/liblpe.a: install lib/liblpe.a
build $PREFIX/include/liblpe.h: install liblpe/liblpe.h
build install-liblpe: phony $PREFIX/lib/liblpe.a $PREFIX/include/liblpe.h

build build/lpe-utils/bitmap2lpe.o: cc lpe-utils/bitmap2lpe.c
build bin/bitmap2lpe: ld build/lpe-utils/bitmap2lpe.o | liblpe

build build/lpe-utils/lpe2bitmap.o: cc lpe-utils/lpe2bitmap.c
build bin/lpe2bitmap: ld build/lpe-utils/lpe2bitmap.o | liblpe

build build/lpe-utils/lpe2bmp.o: cc lpe-utils/lpe2bmp.c
build bin/lpe2bmp: ld build/lpe-utils/lpe2bmp.o | liblpe

build lpe-utils: phony bin/bitmap2lpe bin/lpe2bitmap bin/lpe2bmp

build $PREFIX/bin/bitmap2lpe: install bin/bitmap2lpe
build $PREFIX/bin/lpe2bitmap: install bin/lpe2bitmap
build $PREFIX/bin/lpe2bmp: install bin/lpe2bmp
build install-lpe-utils: phony $PREFIX/bin/bitmap2lpe $PREFIX/bin/lpe2bitmap $PREFIX/bin/lpe2bmp

build install: phony install-liblpe install-lpe-utils

default liblpe lpe-utils
EOF
  else
cat << EOF >> build.ninja
build build/lpe-web/wrapper.o: cc lpe-web/wrapper.c
build bin/lpe-web/lpe-web.js: install lpe-web/loader.js
build bin/lpe-web/lpe-web.wasm: ld build/lpe-web/wrapper.o | liblpe

build lpe-web: phony bin/lpe-web/lpe-web.js bin/lpe-web/lpe-web.wasm

default liblpe lpe-web
EOF
  fi
}

if [ "$1" = "wasm32" ]; then
  CC=${CC:-clang --target=wasm32}
  AR=${AR:-llvm-ar}
  WASM_LD=${WASM_LD:-wasm-ld}
else
  CC=${CC:-gcc}
  AR=${AR:-ar}
  PREFIX=${PREFIX:-/usr/local}
fi

generate_ninja "$1"