Add a port of the development version of DragonEgg.

DragonEgg is a gcc plugin that replaces GCC's optimizers and code
generators with those from the LLVM project.  It works with gcc-4.5
or gcc-4.6, can target the x86-32/x86-64 and ARM processor families.
It fully supports Ada, C, C++ and Fortran.  It has partial support
for Go, Java, Obj-C and Obj-C++.

Feature safe:	yes

4 files changed, 174 insertions, 0 deletions

diff --git a/lang/dragonegg-devel46/Makefile b/lang/dragonegg-devel46/Makefile
new file mode 100644
index 000000000000..c017151031b2
--- /dev/null
+++ b/lang/dragonegg-devel46/Makefile
@@ -0,0 +1,74 @@
+# $FreeBSD$
+#
+
+PORTNAME=	dragonegg46
+PORTVERSION=	3.2.r${SVN_REV}
+CATEGORIES=	lang devel
+MASTER_SITES=	${MASTER_SITE_LOCAL}
+MASTER_SITE_SUBDIR=	brooks
+PKGNAMESUFFIX=	-devel
+
+MAINTAINER=	brooks@FreeBSD.org
+COMMENT=	GCC plugin to use the LLVM backend
+
+# XXX: not entierly sure if llvm-devel is a depend
+BUILD_DEPENDS+=	llvm-devel>=${PORTVERSION}:${PORTSDIR}/devel/llvm-devel
+RUN_DEPENDS+=	${CC}:${PORTSDIR}/lang/gcc \
+		llvm-devel>=${PORTVERSION}:${PORTSDIR}/devel/llvm-devel
+
+OPTIONS_DEFINE=	DOCS
+
+USE_BZIP2=	yes
+USE_GCC=	4.6
+USE_GMAKE=	yes
+USE_LDCONFIG=	yes
+MAKE_JOBS_SAFE=	yes
+
+DRAGONEGG_RELEASE=	${PORTVERSION:C/\.r[0-9]*//}
+DRAGONEGG_SO=		dragonegg-${DRAGONEGG_RELEASE}.so
+DRAGONEGG_PATH=		${GCC_LIBDIR}/${DRAGONEGG_SO}
+GCC_LIBDIR=		lib/${CC}
+
+ALL_TARGET=
+MAKE_ARGS=	GCC=${LOCALBASE}/bin/${CC}
+
+.include "${.CURDIR}/../../devel/llvm-devel/Makefile.svn_rev"
+
+PLIST_FILES=		${GCC_LIBDIR}/${DRAGONEGG_SO}
+
+.include <bsd.port.options.mk>
+
+.if ${PORT_OPTIONS:MDOCS}
+PORTDOCS=		README
+.endif
+
+.if defined(BOOTSTRAP) || defined(SVN_FETCH)
+FETCH_DEPENDS+=	svn:${PORTSDIR}/devel/subversion
+
+do-fetch:
+	${MKDIR} ${WRKDIR}
+	svn export -r ${SVN_REV} \
+	    http://llvm.org/svn/llvm-project/dragonegg/trunk \
+	    ${WRKDIR}/${DISTNAME}
+	cd ${WRKDIR}; tar cvfy ${DISTDIR}/${DISTNAME}.tar.bz2 ${DISTNAME}
+.if ${USER} == brooks
+	scp ${DISTDIR}/${DISTNAME}.tar.bz2 \
+	    freefall.freebsd.org:public_distfiles/
+.endif
+.endif
+
+post-patch:
+	${REINPLACE_CMD} -e 's/%%CC%%/${CC}/' \
+	    -e 's#%%PLUGINPATH%%#${LOCALBASE}/${DRAGONEGG_PATH}#' \
+	    -e 's/arg-dragonegg/arg-dragonegg-${DRAGONEGG_RELEASE}/' \
+	    ${WRKSRC}/README
+
+do-install:
+	${INSTALL_LIB} ${WRKSRC}/dragonegg.so \
+	    ${LOCALBASE}/${GCC_LIBDIR}/${DRAGONEGG_SO}
+.if ${PORT_OPTIONS:MDOCS}
+	${MKDIR} ${DOCSDIR}
+	${INSTALL_DATA} ${WRKSRC}/README ${DOCSDIR}
+.endif
+
+.include <bsd.port.mk>
diff --git a/lang/dragonegg-devel46/distinfo b/lang/dragonegg-devel46/distinfo
new file mode 100644
index 000000000000..19e380c61af4
--- /dev/null
+++ b/lang/dragonegg-devel46/distinfo
@@ -0,0 +1,2 @@
+SHA256 (dragonegg46-3.2.r164604.tar.bz2) = 6cc9cf2056e95883571ed67b454589e7655a3c219e07b27249252fc40a4737f5
+SIZE (dragonegg46-3.2.r164604.tar.bz2) = 602853
diff --git a/lang/dragonegg-devel46/files/patch-README b/lang/dragonegg-devel46/files/patch-README
new file mode 100644
index 000000000000..5f0c98eb0905
--- /dev/null
+++ b/lang/dragonegg-devel46/files/patch-README
@@ -0,0 +1,90 @@
+
+$FreeBSD$
+
+--- README.orig
++++ README
+@@ -1,82 +1,15 @@
+ ----------------------
+-- BUILD INSTRUCTIONS -
+-----------------------
+-
+-Prerequisites
+--------------
+-
+-The dragonegg plugin works with gcc 4.5, gcc 4.6 or gcc-4.7, so you will need to
+-have one of these installed.  Many linux distributions ship one or both of them,
+-perhaps as an addon package; binaries can be downloaded for most platforms.
+-Otherwise you can always build gcc yourself.  Plugin support (--enable-plugin)
+-needs to be enabled in gcc, but since it is enabled by default on most platforms
+-you usually won't need to do this explicitly.
+-
+-Step 0: Build and install llvm
+-------------------------------
+-
+-I'm assuming anyone reading this knows how to build and install llvm.  The
+-version of llvm must match the version of the plugin, so if you are building
+-dragonegg-3.0 then you should use llvm-3.0, while if you are building the
+-development version of dragonegg then use the development version of llvm.
+-
+-
+-Step 1: Build the plugin
+-------------------------
+-
+-Build the plugin like this:
+-  GCC=PATH_TO_INSTALLED_GCC make
+-This command should be executed in the directory containing this README.
+-
+-The plugin needs to know about the version of gcc it will be loaded into, which
+-is why you need to specify your version of gcc 4.5/4.6 via the GCC variable like
+-this.  For example, if the version of gcc you want to load the plugin into is
+-/usr/local/gcc-4.6/bin/gcc, then you should do
+-  GCC=/usr/local/gcc-4.6/bin/gcc make
+-If you don't set the GCC variable then by default "gcc" is used, so you
+-can just do
+-  make
+-if you plan to use the plugin with whatever version of gcc is in your path.
+-
+-The plugin makes use of various gcc headers that are usually shipped with gcc.
+-However some linux distributions, for example debian and ubuntu, have split the
+-headers out of gcc into a separate package.  So if you get errors along the
+-lines of "config.h not found", check whether gcc headers like "config.h" and
+-"tree.h" are installed.  On debian the package containing headers is called
+-gcc-4.5-plugin-dev or gcc-4.6-plugin-dev.
+-
+-The plugin is compiled using the system compiler, and not with the gcc specified
+-in the GCC variable (which wouldn't work if it is a cross compiler).  If you
+-want to also compile the plugin with your copy of gcc 4.5/4.6, you can do:
+-  CXX=PATH_TO_INSTALLED_GCC GCC=PATH_TO_INSTALLED_GCC make
+-
+-The build system runs the "llvm-config" program (which should be in your path if
+-you installed llvm properly in step 0) to find out about the copy of LLVM you
+-installed, so there is no need to tell the build system explicitly about LLVM.
+-If llvm-config is not in your path then you can specify where to find it using
+-the LLVM_CONFIG variable.
+-
+-The end result of the build is a shared library, dragonegg.so.
+-
+-If you want the dragonegg plugin to be able to load LLVM plugins then pass
+-ENABLE_LLVM_PLUGINS=1 to make.
+-
+-
+-----------------------
+ - USAGE INSTRUCTIONS -
+ ----------------------
+ 
+-Run gcc as usual, but pass -fplugin=./dragonegg.so as an extra command line
+-argument.  Make sure you use the gcc you built dragonegg against (see step 1)!
++Run %%CC%% as usual, but pass -fplugin=%%PLUGINPATH%%
++as an extra command line argument.
+ 
+ 
+ ------------------
+ - USEFUL OPTIONS -
+ ------------------
+ 
+-If you renamed dragonegg.so to something else, for example llvm.so, replace
+--fplugin-arg-dragonegg with -fplugin-arg-llvm in the options below.
+-
+ -fplugin-arg-dragonegg-emit-ir
+ -flto
+   Output LLVM IR rather than target assembler.  You need to use -S with this,
diff --git a/lang/dragonegg-devel46/pkg-descr b/lang/dragonegg-devel46/pkg-descr
new file mode 100644
index 000000000000..7f2a654ac9b3
--- /dev/null
+++ b/lang/dragonegg-devel46/pkg-descr
@@ -0,0 +1,8 @@
+DragonEgg is a gcc plugin that replaces GCC's optimizers and code
+generators with those from the LLVM project. It works with gcc-4.5
+or gcc-4.6, can target the x86-32/x86-64 and ARM processor families,
+and has been successfully used on the Darwin, FreeBSD, KFreeBSD,
+Linux and OpenBSD platforms. It fully supports Ada, C, C++ and
+Fortran. It has partial support for Go, Java, Obj-C and Obj-C++.
+
+WWW: http://dragonegg.llvm.org/