bash.sh

#!/usr/bin/env bash

set -euo pipefail
set -x
 
OS="$(uname -s)"

have() { command -v "$1" >/dev/null 2>&1; }

# Pick a native C++ compiler (allow override via CXX env).
if [[ -n "${CXX:-}" ]]; then
  CXX_BIN="$CXX"
elif have g++; then
  CXX_BIN="g++"
elif have clang++; then
  CXX_BIN="clang++"
else
  echo "error: no C++ compiler found (g++/clang++)." >&2
  exit 1
fi

BASE_CXX_FLAGS=(-Wall -Wextra -Wpedantic -std=c++17 -O2)
DBG_FLAGS=()
case "$OS" in
  Darwin*) DBG_FLAGS+=(-g) ;;   # clang on macOS
  Linux*)  DBG_FLAGS+=(-ggdb) ;;
  *)       DBG_FLAGS+=(-g) ;;
esac

"$CXX_BIN" "${BASE_CXX_FLAGS[@]}" "${DBG_FLAGS[@]}" -o runnable main.cpp

./runnable

# clang++ -Wall -Wextra --target=wasm32 -o wasm.o -c ./webm/render_web.cpp
# wasm-ld -m wasm32 --no-entry --export-all -allow-undefined -o ./webm/wasm.wasm ./webm/wasm.o

if have clang++ && have wasm-ld; then
  clang++ \
    -Wall -Wextra \
    --target=wasm32 \
    -nostdlib \
    -fno-exceptions \
    -fno-rtti \
    -c webm/render_web.cpp \
    -o webm/render_web.o

  clang++ \
    -Wall -Wextra \
    --target=wasm32 \
    -nostdlib \
    -fno-exceptions \
    -fno-rtti \
    -c physics/physics.cpp \
    -o webm/physics.o

  wasm-ld \
    --no-entry \
    --allow-undefined \
    webm/render_web.o \
    webm/physics.o \
    -o webm/wasm.wasm
else
  echo "note: skipping wasm build (need clang++ and wasm-ld)." >&2
fi


# good to know
# This below converts files that are returned by ls with ppm extension to png!
# ls | grep ppm | sed 's/.ppm//' | xargs -Ixx convert xx.ppm xx.png