environment

#!/bin/sh

# usage: source environment [optional: ios-arm64, ios-sim, android-arm64-v8a, android-armeabi-v7a, android-x86_64, mingw-w64]
ARG=$1

if [[ -z "$ARG" ]]; then
    echo "setting compiler for native build";
elif [ "ios-arm64" == "$ARG" ]; then
    echo "setting compiler for Apple iOS (only 64bit)";
elif [ "ios-sim" == "$ARG" ]; then
    echo "setting compiler for Apple iOS Simulator";
elif [ "android-arm64-v8a" == "$ARG" ]; then
    echo "setting compiler for Android arm64-v8a";
elif [ "android-armeabi-v7a" == "$ARG" ]; then
    echo "setting compiler for Android armeabi-v7a";
elif [ "android-x86_64" == "$ARG" ]; then
    echo "setting compiler for Android x86_64";
elif [ "mingw-w64" == "$ARG" ]; then
    echo "setting compiler for Windows x86_64";
else
    echo "no suitable platform found, options are 'ios-arm64', 'ios-sim', 'android-arm64-v8a', 'android-armeabi-v7a', 'android-x86_64', 'mingw-w64']"
    return 1
fi

ANDROIDREGEX="^(android)"
# check Android env vars
if [[ "$ARG" =~ $ANDROIDREGEX ]]; then
    echo "checking env vars for Android";
    if [[ -z "$ANDROID_NDK" ]]; then
        echo "ANDROID_NDK not defined! Example: 'export ANDROID_NDK=/usr/local/android-ndk-r21'";
        return 1
    fi
    if [[ -z "$ANDROID_HOST_TAG" ]]; then
        echo "ANDROID_HOST_TAG not defined! Example: 'export ANDROID_HOST_TAG=darwin-x86_64' for macOS";
        return 1
    fi
    # sample ANDROID definitions and paths for macOS
    # export ANDROID_NDK=/usr/local/android-ndk-r21
    # export ANDROID_HOST_TAG=darwin-x86_64
    echo "using ANDROID_NDK=$ANDROID_NDK";
    echo "using ANDROID_HOST_TAG=$ANDROID_HOST_TAG";
    export PATH=${ANDROID_NDK}/toolchains/llvm/prebuilt/${ANDROID_HOST_TAG}/bin:${PATH};
    echo "using PATH=${PATH}";
fi

# common
BSPJOB=$(getconf _NPROCESSORS_ONLN)
BSPROOT=$(cd $(dirname "${BASH_SOURCE[0]}") >/dev/null && pwd)

# platform
if [[ -z "$ARG" ]]; then
    BSPCC=gcc
    BSPCXX=g++
    BSPHOST=
    BSPPREFIX=
    BSPCFLAGS="-fPIC"
    BSPLDFLAGS=
    BSPPLATFORM=$(arch)
elif [ "ios-arm64" == "$ARG" ]; then
    BSPCC=$(xcrun --sdk iphoneos -f clang)
    BSPCXX=$(xcrun --sdk iphoneos -f clang++)
    BSPHOST="--host=aarch64-apple-darwin"
    BSPPREFIX=
    BSPCFLAGS="-arch arm64 -miphoneos-version-min=12.1 -isysroot $(xcrun --sdk iphoneos --show-sdk-path) -fno-common"
    BSPLDFLAGS=
    BSPPLATFORM=ios-arm64
elif [ "ios-sim" == "$ARG" ]; then
    BSPCC=$(xcrun --sdk iphonesimulator -f clang)
    BSPCXX=$(xcrun --sdk iphonesimulator -f clang++)
    BSPHOST="--host=x86_64-apple-darwin"
    BSPPREFIX=
    BSPCFLAGS="-arch x86_64 -miphonesimulator-version-min=12.1 -isysroot $(xcrun --sdk iphonesimulator --show-sdk-path)"
    BSPLDFLAGS=
    BSPPLATFORM=ios-sim
elif [ "android-arm64-v8a" == "$ARG" ]; then
    BSPCC=aarch64-linux-android21-clang
    BSPCXX=aarch64-linux-android21-clang++
    BSPHOST="--host aarch64-linux-android"
    BSPPREFIX=aarch64-linux-android
    BSPCFLAGS="-fPIC"
    BSPLDFLAGS=
    BSPPLATFORM=android-arm64-v8a
elif [ "android-armeabi-v7a" == "$ARG" ]; then
    BSPCC=armv7a-linux-androideabi21-clang
    BSPCXX=armv7a-linux-androideabi21-clang++
    BSPHOST="--host arm-linux-androideabi"
    BSPPREFIX=arm-linux-androideabi
    BSPCFLAGS="-fPIC"
    BSPLDFLAGS=
    BSPPLATFORM=android-armeabi-v7a
elif [ "android-x86_64" == "$ARG" ]; then
    BSPCC=x86_64-linux-android21-clang
    BSPCXX=x86_64-linux-android21-clang++
    BSPHOST="--host x86_64-linux-android"
    BSPPREFIX=x86_64-linux-android
    BSPCFLAGS="-fPIC"
    BSPLDFLAGS=
    BSPPLATFORM=android-x86_64
elif [ "mingw-w64" == "$ARG" ]; then
    BSPCC=x86_64-w64-mingw32-gcc
    BSPCXX=x86_64-w64-mingw32-g++
    BSPHOST="--host x86_64-w64-mingw32"
    BSPPREFIX=x86_64-w64-mingw32
    BSPCFLAGS="-fPIC"
    BSPLDFLAGS=
    BSPPLATFORM=mingw-w64
fi

# debugging & profiling
BSPEXTRAFLAGS=

# tools and output
BSPTOOLS=${BSPROOT}/tools-out
BSPROOTFS=${BSPROOT}/packages-out/${BSPPLATFORM}
PATH=${BSPTOOLS}/bin:${PATH}

export BSPJOB BSPROOT BSPCC BSPCXX BSPHOST BSPPREFIX BSPCFLAGS BSPLDFLAGS BSPPLATFORM BSPEXTRAFLAGS BSPTOOLS BSPROOTFS PATH

echo "using settings:"
echo "  BSPCC=$BSPCC"
echo "  BSPCXX=$BSPCXX"
echo "  BSPHOST=$BSPHOST"
echo "  BSPPREFIX=$BSPPREFIX"
echo "  BSPCFLAGS=$BSPCFLAGS"
echo "  BSPLDFLAGS=$BSPLDFLAGS"
echo "  BSPPLATFORM=$BSPPLATFORM"