Build osx bundle

Info.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>CFBundleName</key><string>Test</string>
  <key>CFDisplayName</key><string>Test</string>
  <key>CFBundleIdentifier</key><string>org.example.Test</string>
  <key>CFBundlePackageType</key><string>APPL</string>
  <key>CFBundleSignature</key><string>????</string>
  <key>CFBundleVersion</key><string>%%VERSION%%</string>
  <key>CFBundleShortVersionString</key><string>%%VERSION%%</string>
  <key>CFBundleExecutable</key><string>Test</string>
  <key>CFBundleDevelopmentRegion</key><string>en</string>
  <key>CFBundleGetInfoString</key>
  <string>Copyright © 2014 Yourname</string>
  <key>NSHumanReadableCopyright</key>
  <string>Copyright © 2014 Yourname</string>
  <key>CFBundleInfoDictionaryVersion</key><string>6.0</string>
  <key>NSHighResolutionCapable</key><true/>
  <key>CFBundleDocumentTypes</key>
  <array>
    <dict>
      <key>CFBundleTypeRole</key>
      <string>Viewer</string>
      <key>LSItemContentTypes</key>
      <array>
        <string>public.item</string>
      </array>
    </dict>
  </array>
</dict>
</plist>

macos_app.sh

# Invoke as follows: 
#
#    macosx_app Appname execname libs res_dir
#
# res_dir should have at least the above Info.plist
#
# Example:
#    macosx_app Test _build/src/test.native "libSDL2 libffi" app

macosx_app ()
{
    BUILDDIR=_build
    APP=$1
    EXE=$2
    DYLIBS=$3
    RESDIR=$4
    mkdir -p $BUILDDIR/$APP.app/Contents
    mkdir -p $BUILDDIR/$APP.app/Contents/MacOS
    mkdir -p $BUILDDIR/$APP.app/Contents/Frameworks
    mkdir -p $BUILDDIR/$APP.app/Contents/Resources
    
    for f in $RESDIR/* ; do
        if [ "$f" == "$RESDIR/Info.plist" ]; then 
            cp $f $BUILDDIR/$APP.app/Contents/
        else
            cp $f $BUILDDIR/$APP.app/Contents/Resources
        fi
    done

    APPEXE="$BUILDDIR/$APP.app/Contents/MacOS/$APP"
    cp $EXE $APPEXE

    for libname in $DYLIBS; do 
        ID=`otool -L $APPEXE | grep -o "/.*$libname.*.dylib"`
        NEWID="@loader_path/../Frameworks/`basename $ID`"
        LOC="$BUILDDIR/$APP.app/Contents/Frameworks/`basename $ID`"
        cp $ID $LOC
        chmod u+w $LOC
        install_name_tool -id $NEWID $LOC
        install_name_tool -change $ID $NEWID $APPEXE
    done

    if [ ! -h $APP.app ]; then
        ln -s $BUILDDIR/$APP.app $APP.app
    fi
}