Add initial cut of build script

build_odin.sh

@@ -0,0 +1,118 @@
+#!/bin/bash
+set -eu
+
+GIT_SHA=$(git rev-parse --short HEAD)
+DISABLED_WARNINGS="-Wno-switch -Wno-macro-redefined -Wno-unused-value"
+LDFLAGS="-pthread -lm -lstdc++"
+CFLAGS="-std=c++14 -DGIT_SHA=\"$GIT_SHA\""
+CFLAGS="$CFLAGS -DODIN_VERSION_RAW=\"dev-$(date +"%Y-%m")\""
+CC=clang
+OS=$(uname)
+
+panic() {
+	printf "%s\n" "$1"
+	exit 1
+}
+
+config_darwin() {
+	ARCH=$(uname -m)
+    LLVM_CONFIG=llvm-config
+
+    # allow for arm only llvm's with version 13
+	if [ ARCH == arm64 ]; then
+        LLVM_VERSIONS="13.%.%"
+	else
+    	# allow for x86 / amd64 all llvm versions begining from 11
+        LLVM_VERSIONS="13.%.%" "12.0.1" "11.1.0"
+	fi
+
+    if [ $($LLVM_CONFIG --version | grep -E $(LLVM_VERSION_PATTERN)) == 0 ]; then
+		if [ ARCH == arm64 ]; then
+            panic "Requirement: llvm-config must be base version 13 for arm64"
+		else
+			panic "Requirement: llvm-config must be base version greater than 11 for amd64/x86"
+		fi
+    fi
+
+    LDFLAGS="$LDFLAGS -liconv -ldl"
+    CFLAGS="$CFLAGS $($LLVM_CONFIG --cxxflags --ldflags)"
+    LDFLAGS="$LDFLAGS -lLLVM-C"
+}
+
+config_openbsd() {
+    LLVM_CONFIG=/usr/local/bin/llvm-config
+
+    LDFLAGS="$LDFLAGS -liconv"
+    CFLAGS="$CFLAGS $($LLVM_CONFIG --cxxflags --ldflags)"
+    LDFLAGS="$LDFLAGS $($LLVM_CONFIG --libs core native --system-libs)"
+}
+
+config_linux() {
+    LLVM_CONFIG=llvm-config
+
+    LDFLAGS="$LDFLAGS -ldl"
+    CFLAGS="$CFLAGS $($LLVM_CONFIG --cxxflags --ldflags)"
+    LDFLAGS="$LDFLAGS $($LLVM_CONFIG --libs core native --system-libs)"
+}
+
+build_odin() {
+	set -x
+	$CC src/main.cpp src/libtommath.cpp $DISABLED_WARNINGS $CFLAGS $EXTRAFLAGS $LDFLAGS -o odin
+	set +x
+}
+
+run_demo() {
+	./odin run examples/demo/demo.odin
+}
+
+case $OS in
+Linux)
+	config_linux
+	;;
+Darwin)
+	config_darwin
+	;;
+OpenBSD)
+	config_openbsd
+	;;
+esac
+
+if [[ $# -eq 0 ]]; then
+	EXTRAFLAGS="-g"
+
+	build_odin
+	run_demo
+
+	exit 0
+fi
+
+if [[ $# -eq 1 ]]; then
+	case $1 in
+	report)
+		EXTRAFLAGS="-g"
+		build_odin
+		./odin report
+		exit 0
+		;;
+	debug)
+		EXTRAFLAGS="-g"
+		;;
+	release)
+		EXTRAFLAGS="-O3"
+		;;
+	release_native)
+		EXTRAFLAGS="-O3 -march=native"
+		;;
+	nightly)
+		EXTRAFLAGS="-DNIGHTLY -O3"
+		;;
+	*)
+		panic "Unsupported build option!"
+		;;
+	esac
+
+	build_odin
+	run_demo
+
+	exit 0
+fi