Bootstrapping out-of-source builds

bootstrap

#!/bin/bash

declare -A CC CXX SPEC
CC=(   [clang]=clang   [gcc]=gcc )
CXX=(  [clang]=clang++ [gcc]=g++ )
SPEC=( [clang]=clang   [gcc]=g++ )

SOURCE_DIR=`pwd`
TOPDIR=~/tmp/build

function detect-generator {
  if [ -e "$1/CMakeLists.txt" ]; then
    GENERATOR=cmake
  elif [ -n "`find \"$1\" -maxdepth 1 -name '*.pro' -print -quit`" ]; then
    GENERATOR=qmake
  else
    echo "Failed to detect generator for $1" >&2
  fi
  [ -n "$GENERATOR" ]
}

function run-cmake {
  CC="${CC[$2]}" CXX="${CXX[$2]}" cmake "$1"
}

function run-qmake {
  qmake -Wall -Wlogic -Wparser -spec "linux-${SPEC[$2]}" \
    CONFIG+=debug_and_release "$1"
}

function boot {
  local BUILD_DIR="$TOPDIR/"`basename "$SOURCE_DIR"`"-$2"
  mkdir "$BUILD_DIR" || exit
  pushd "$BUILD_DIR" || exit
  "run-$GENERATOR" "$@" ; RC=$?
  popd
  return $RC
}

detect-generator "$SOURCE_DIR" || exit
for TOOLSET in clang gcc; do
  which "$TOOLSET" > /dev/null 2>&1 && \
    boot "$SOURCE_DIR" "$TOOLSET" || exit
done