juce: Added support for JUCE framework

See below for the official README from JUCE.

For TL;DRs: JUCE is a well known and widely used C++ Framework for audio
applications. It has good support for Linux and ARM.

A typical JUCE application recipe will only contain this skeleton:

inherit juce

SRC_URI = "..."

JUCE_JUCERS = "${B}/cool-project.jucer"

do_compile() {
  CONFIG=Release oe_runmake
}

do_install() {
  install ...
}

======

OBS: This recipe requires a patch[1] on oe-core which is been tested right now.

[1] http://lists.openembedded.org/pipermail/openembedded-core/2016-July/123972.html

======

>From the README:

JUCE (Jules' Utility Class Extensions) is an all-encompassing
C++ framework for developing cross-platform software.

It contains pretty much everything you're likely to need to create
most applications, and is particularly well-suited for building
highly-customised GUIs, and for handling graphics and sound.

Most JUCE modules are shared under the GNU Public Licence
(GPLv2, v3, and the AGPLv3). This means that the code can
be freely copied and distributed, and costs nothing to use
in other GPL applications. One module (the juce_core module)
is permissively licensed under the ISC.

For more information, visit the website:
http://www.juce.com

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-multimedia/classes/juce.bbclass

@@ -0,0 +1,37 @@
+inherit pkgconfig
+
+JUCE_X11_DEPS = "libx11 libxext libxinerama libxinerama libxrandr libxcursor freetype"
+JUCE_DEPS = " \
+  ${@bb.utils.contains('DISTRO_FEATURES', 'x11', '${JUCE_X11_DEPS}', '', d)} \
+  alsa-lib \
+  curl \
+"
+DEPENDS_prepend = "projucer-native ${JUCE_DEPS} "
+
+export OE_JUCE_PROJUCER = "${STAGING_BINDIR_NATIVE}/Projucer"
+
+juce_do_configure() {
+  if [ -z "${JUCE_JUCERS}" ]; then
+    JUCERS=`find . -type f -iname "*.jucer"` && IFS=$'\n'
+  else
+    JUCERS="${JUCE_JUCERS}"
+  fi
+
+  if [ -z "$JUCERS" ]; then
+    die "JUCE_JUCERS not set and no profiles found in $PWD"
+  fi
+
+  # XXX: Hack for Projucer, since it requires a X Display even when running in
+  # console mode. This will be fixed in future. Most cases DISPLAY=:0 will just work,
+  # the only case why we have JUCE_DISPLAY variable, is in case of a build system,
+  # such as jenkins, that can have multiple virtual X server running for each build.
+  test -z "${JUCE_DISPLAY}" && export DISPLAY=:0 || export DISPLAY=${JUCE_DISPLAY}
+
+  for i in $JUCERS; do
+    ${OE_JUCE_PROJUCER} --resave $i
+  done
+}
+
+EXPORT_FUNCTIONS do_configure
+
+addtask configure after do_unpack do_patch before do_compile

meta-multimedia/recipes-multimedia/juce/nativesdk-projucer_git.bb

@@ -0,0 +1,2 @@
+inherit nativesdk
+include projucer.inc

meta-multimedia/recipes-multimedia/juce/projucer-native_git.bb

@@ -0,0 +1,2 @@
+inherit native
+include projucer.inc

meta-multimedia/recipes-multimedia/juce/projucer.inc

@@ -0,0 +1,37 @@
+SUMMARY = "JUCE's Projucer"
+DESCRIPTION = "Projucer is used to build and generate support files and build infrastructure for all \
+JUCE supported platforms, including Linux and Embedded Linux."
+SECTION = "utils"
+HOMEPAGE = "http://juce.com/"
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://README.txt;md5=9ab765ccda8890efc753f287911a1958"
+
+inherit pkgconfig
+
+DEPENDS = "libx11 libxext libxinerama libxrandr libxcursor freetype alsa-lib curl"
+
+SRCREV = "a8a7fa28e2e9cb19db6a27fcccb567a8ccfe6109"
+BRANCH = "develop"
+SRC_URI = "git://github.com/julianstorer/JUCE.git;protocol=https;branch=${BRANCH}"
+
+S = "${WORKDIR}/git"
+PV = "4.2.3+git${SRCPV}"
+
+JUCE_PROJUCER_BUILD_PATH = "${B}/extras/Projucer/Builds"
+JUCE_PROJUCER_MAKEFILE_PATH = "${JUCE_PROJUCER_BUILD_PATH}/LinuxMakefile"
+JUCE_PROJUCER = "${JUCE_PROJUCER_MAKEFILE_PATH}/build/Projucer"
+
+do_configure() {
+  cd ${JUCE_PROJUCER_MAKEFILE_PATH}
+  CONFIG=Release oe_runmake clean
+}
+
+do_compile() {
+  cd ${JUCE_PROJUCER_MAKEFILE_PATH}
+  CONFIG=Release oe_runmake
+}
+
+do_install() {
+  install -d ${D}${bindir}
+  install -m 0755 ${JUCE_PROJUCER} ${D}${bindir}
+}