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Date:      Sun, 30 Jun 2019 14:56:12 +0000 (UTC)
From:      Niclas Zeising <zeising@FreeBSD.org>
To:        ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org
Subject:   svn commit: r505425 - in head: Mk devel/libclc devel/libclc/files graphics/libosmesa graphics/mesa-dri graphics/mesa-dri/files graphics/mesa-libs lang/beignet lang/beignet/files lang/clover
Message-ID:  <201906301456.x5UEuCdg037342@repo.freebsd.org>

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Author: zeising
Date: Sun Jun 30 14:56:12 2019
New Revision: 505425
URL: https://svnweb.freebsd.org/changeset/ports/505425

Log:
  Switch mesa and related ports to llvm80
  
  Switch mesa over to use llvm80 instead of llvm60.  Make it use the
  global LLVM_DEFAULT instead of deciding for ourself which llvm version
  to use. [1]
  
  Fix build of lang/beginet [1]
  
  Add patch from upstream to fix build of devel/libclc.  The patch is taken
  from the git mirror of devel/libclc rather than the SVN repo, for
  convenience.
  
  Add a patch from mesa upstream preventing certain error messages when using
  amdgpu [2]
  
  Add a notice to bsd.default-versions.mk asking that the graphics team be
  informed before the llvm version is changed.
  
  Enable llvm and gallium on MIPS.  As far as I can tell, this used to
  be the default before this change.
  
  Bump portrevisions since dependencies changed.
  
  PR:		230789 [1], [2]
  Submitted by:	jbeich [1], tobik [2]
  Obtained from:	FreeBSD Graphics Team development repo
  		https://github.com/FreeBSDDesktop/freebsd-ports/commits/feature/mesa-llvm80
  Sponsored by:	B3 Init (zeising)

Added:
  head/devel/libclc/files/patch-62a9191.c   (contents, props changed)
  head/graphics/mesa-dri/files/patch-9cab8cc.c   (contents, props changed)
  head/lang/beignet/files/patch-llvm8   (contents, props changed)
Modified:
  head/Mk/bsd.default-versions.mk
  head/devel/libclc/Makefile
  head/graphics/libosmesa/Makefile
  head/graphics/mesa-dri/Makefile
  head/graphics/mesa-dri/Makefile.common
  head/graphics/mesa-libs/Makefile
  head/lang/beignet/Makefile
  head/lang/clover/Makefile

Modified: head/Mk/bsd.default-versions.mk
==============================================================================
--- head/Mk/bsd.default-versions.mk	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/Mk/bsd.default-versions.mk	Sun Jun 30 14:56:12 2019	(r505425)
@@ -59,6 +59,8 @@ LINUX_DEFAULT?=		c6_64
 LINUX_DEFAULT?=		c6
 .endif
 # Possible values: 60, 70, 80, -devel (to be used when non-base compiler is required)
+# Please give notice to the Graphics Team (x11@FreeBSD.org) in advance before 
+# bumping the LLVM version.
 LLVM_DEFAULT?=		80
 # Possible values: 5.1, 5.2, 5.3
 LUA_DEFAULT?=		5.2

Modified: head/devel/libclc/Makefile
==============================================================================
--- head/devel/libclc/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/devel/libclc/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -3,7 +3,7 @@
 
 PORTNAME=	libclc
 DISTVERSION=	0.3.0.20180518
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	devel
 
 MAINTAINER=	x11@FreeBSD.org
@@ -13,7 +13,7 @@ LICENSE=	BSD3CLAUSE MIT
 LICENSE_COMB=	dual
 LICENSE_FILE=	${WRKSRC}/LICENSE.TXT
 
-BUILD_DEPENDS=	llvm${LLVMVER}>=4.0:devel/llvm${LLVMVER} \
+BUILD_DEPENDS=	llvm${LLVM_DEFAULT}>=4.0:devel/llvm${LLVM_DEFAULT} \
 		libedit>=0:devel/libedit
 
 USE_GITHUB=	yes
@@ -24,9 +24,6 @@ GH_TAGNAME=	a2118d5
 USES=		gmake python:2.7,build gmake
 USE_LDCONFIG=	yes
 MAKE_ENV=	MAKE=${GMAKE} DESTDIR=${STAGEDIR}
-
-LLVMVER=	${MESA_LLVM_VER:U60}
-
 ALL_TARGET=
 
 post-patch:
@@ -37,7 +34,7 @@ post-patch:
 
 do-configure:
 	@cd ${WRKSRC} && ${PYTHON_CMD} configure.py ${CONFIGURE_ARGS} -g make \
-		--with-llvm-config=${LOCALBASE}/bin/llvm-config${LLVMVER} \
+		--with-llvm-config=${LOCALBASE}/bin/llvm-config${LLVM_DEFAULT} \
 		--pkgconfigdir=${PREFIX}/libdata/pkgconfig \
 		--prefix=${PREFIX}
 

Added: head/devel/libclc/files/patch-62a9191.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/devel/libclc/files/patch-62a9191.c	Sun Jun 30 14:56:12 2019	(r505425)
@@ -0,0 +1,73 @@
+From 62a9191b606abdab8e2607d945628fa90d9664c1 Mon Sep 17 00:00:00 2001
+From: Jan Vesely <jan.vesely@rutgers.edu>
+Date: Fri, 3 Aug 2018 15:14:08 +0000
+Subject: [PATCH] amdgcn: Use __constant AS for amdgcn builtins.
+
+Fixes build after clang r338707.
+Reviewer: Matthew.Arsenault@amd.com
+Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
+
+git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@338898 91177308-0d34-0410-b5e6-96231b3b80d8
+---
+ amdgcn-amdhsa/lib/workitem/get_global_size.cl | 4 +++-
+ amdgcn-amdhsa/lib/workitem/get_local_size.cl  | 4 +++-
+ amdgcn/lib/workitem/get_global_offset.cl      | 4 +++-
+ amdgcn/lib/workitem/get_work_dim.cl           | 4 +++-
+ 4 files changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/amdgcn-amdhsa/lib/workitem/get_global_size.cl b/amdgcn-amdhsa/lib/workitem/get_global_size.cl
+index 2289615..392cd08 100644
+--- amdgcn-amdhsa/lib/workitem/get_global_size.cl
++++ amdgcn-amdhsa/lib/workitem/get_global_size.cl
+@@ -1,6 +1,8 @@
+ #include <clc/clc.h>
+ 
+-#if __clang_major__ >= 7
++#if __clang_major__ >= 8
++#define CONST_AS __constant
++#elif __clang_major__ >= 7
+ #define CONST_AS __attribute__((address_space(4)))
+ #else
+ #define CONST_AS __attribute__((address_space(2)))
+diff --git a/amdgcn-amdhsa/lib/workitem/get_local_size.cl b/amdgcn-amdhsa/lib/workitem/get_local_size.cl
+index 034c6d9..64d1cf4 100644
+--- amdgcn-amdhsa/lib/workitem/get_local_size.cl
++++ amdgcn-amdhsa/lib/workitem/get_local_size.cl
+@@ -1,6 +1,8 @@
+ #include <clc/clc.h>
+ 
+-#if __clang_major__ >= 7
++#if __clang_major__ >= 8
++#define CONST_AS __constant
++#elif __clang_major__ >= 7
+ #define CONST_AS __attribute__((address_space(4)))
+ #else
+ #define CONST_AS __attribute__((address_space(2)))
+diff --git a/amdgcn/lib/workitem/get_global_offset.cl b/amdgcn/lib/workitem/get_global_offset.cl
+index 0c2b948..0a87cd2 100644
+--- amdgcn/lib/workitem/get_global_offset.cl
++++ amdgcn/lib/workitem/get_global_offset.cl
+@@ -1,6 +1,8 @@
+ #include <clc/clc.h>
+ 
+-#if __clang_major__ >= 7
++#if __clang_major__ >= 8
++#define CONST_AS __constant
++#elif __clang_major__ >= 7
+ #define CONST_AS __attribute__((address_space(4)))
+ #else
+ #define CONST_AS __attribute__((address_space(2)))
+diff --git a/amdgcn/lib/workitem/get_work_dim.cl b/amdgcn/lib/workitem/get_work_dim.cl
+index 8eb81ba..3add9b6 100644
+--- amdgcn/lib/workitem/get_work_dim.cl
++++ amdgcn/lib/workitem/get_work_dim.cl
+@@ -1,6 +1,8 @@
+ #include <clc/clc.h>
+ 
+-#if __clang_major__ >= 7
++#if __clang_major__ >= 8
++#define CONST_AS __constant
++#elif __clang_major__ >= 7
+ #define CONST_AS __attribute__((address_space(4)))
+ #else
+ #define CONST_AS __attribute__((address_space(2)))

Modified: head/graphics/libosmesa/Makefile
==============================================================================
--- head/graphics/libosmesa/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/graphics/libosmesa/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -3,7 +3,7 @@
 
 PORTNAME=	libosmesa
 PORTVERSION=	${MESAVERSION}
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	graphics
 
 COMMENT=	Off-Screen Mesa implementation of the OpenGL API
@@ -18,7 +18,7 @@ CONFIGURE_ARGS+=	--disable-dri --disable-egl --disable
 MESA_BUILD_WRKSRC=	src/util src/compiler src/mapi src/mesa
 LDFLAGS_i386=		-Wl,-znotext
 
-.if "${MESA_LLVM_VER}" != ""
+.if ${ARCH} == aarch64 || ${ARCH} == amd64 || ${ARCH:Marm*} || ${ARCH} == i386 || ${ARCH:Mmips*} || ${ARCH:Mpowerpc*}
 CONFIGURE_ARGS+=	--enable-osmesa-gallium
 MESA_BUILD_WRKSRC+=	src/gallium
 MESA_INSTALL_WRKSRC=	src/gallium/state_trackers/osmesa src/gallium/targets/osmesa

Modified: head/graphics/mesa-dri/Makefile
==============================================================================
--- head/graphics/mesa-dri/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/graphics/mesa-dri/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -3,7 +3,7 @@
 
 PORTNAME=	mesa-dri
 PORTVERSION=	${MESAVERSION}
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	graphics
 
 COMMENT=	OpenGL hardware acceleration drivers for DRI2+
@@ -33,7 +33,7 @@ ALL_GALLIUM_DRIVERS=	FREEDRENO R300 R600 RADEONSI SVGA
 ALL_VULKAN_DRIVERS=	INTEL RADEON
 
 DRI_DRIVERS=		SWRAST	# classic swrast
-.if "${MESA_LLVM_VER}" != ""
+.if ${ARCH} == aarch64 || ${ARCH} == amd64 || ${ARCH:Marm*} || ${ARCH} == i386 || ${ARCH:Mmips*} || ${ARCH:Mpowerpc*}
 GALLIUM_DRIVERS=	SWRAST	# llvmpipe
 .else
 GALLIUM_DRIVERS=	""
@@ -43,15 +43,8 @@ VULKAN_DRIVERS=		#
 .if ${ARCH} == amd64 || ${ARCH} == i386 \
  || ${ARCH} == powerpc || ${ARCH} == powerpc64
 DRI_DRIVERS+=		RADEON R200
-GALLIUM_DRIVERS+=	R600
-. if "${MESA_LLVM_VER}" != "" && (${ARCH} == amd64 || ${ARCH} == i386)
-# https://cgit.freedesktop.org/mesa/mesa/commit/?id=58952675f6d4
-GALLIUM_DRIVERS+=	R300
-. endif
-. if "${MESA_LLVM_VER}" != ""	# until PPC gets LLVM in base
-GALLIUM_DRIVERS+=	RADEONSI
+GALLIUM_DRIVERS+=	R300 R600 RADEONSI
 VULKAN_DRIVERS+=	RADEON
-. endif
 .endif
 .if ${ARCH} == amd64 || ${ARCH} == i386
 DRI_DRIVERS+=		I915 I965

Modified: head/graphics/mesa-dri/Makefile.common
==============================================================================
--- head/graphics/mesa-dri/Makefile.common	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/graphics/mesa-dri/Makefile.common	Sun Jun 30 14:56:12 2019	(r505425)
@@ -74,19 +74,13 @@ INSTALL_TARGET=	install-strip
 
 .include <bsd.port.pre.mk>
 
-# need LLVM for libEGL wherever possible, but mixing GCC and LLVM breaks Gallium
-.if ${CHOSEN_COMPILER_TYPE} == clang \
- || (${COMPONENT} == libs && ${ARCH} != sparc64)	# no working LLVM
-MESA_LLVM_VER?=	60
-.endif
-
-.if "${MESA_LLVM_VER}" != ""
-BUILD_DEPENDS+=	llvm${MESA_LLVM_VER}>=3.9.0_4:devel/llvm${MESA_LLVM_VER}
+.if ${ARCH} == aarch64 || ${ARCH} == amd64 || ${ARCH:Marm*} || ${ARCH} == i386 || ${ARCH:Mmips*} || ${ARCH:Mpowerpc*}
+BUILD_DEPENDS+=	llvm${LLVM_DEFAULT}>=3.9.0_4:devel/llvm${LLVM_DEFAULT}
 .if ${COMPONENT} != libs
-RUN_DEPENDS+=	llvm${MESA_LLVM_VER}>=3.9.0_4:devel/llvm${MESA_LLVM_VER}
+RUN_DEPENDS+=	llvm${LLVM_DEFAULT}>=3.9.0_4:devel/llvm${LLVM_DEFAULT}
 .endif
-CONFIGURE_ENV+=	LLVM_CONFIG=${LOCALBASE}/bin/llvm-config${MESA_LLVM_VER}
-LDFLAGS+=	-Wl,-rpath=${LOCALBASE}/llvm${MESA_LLVM_VER}/lib
+CONFIGURE_ENV+=	LLVM_CONFIG=${LOCALBASE}/bin/llvm-config${LLVM_DEFAULT}
+LDFLAGS+=	-Wl,-rpath=${LOCALBASE}/llvm${LLVM_DEFAULT}/lib
 CONFIGURE_ARGS+=	--enable-llvm
 .else
 CONFIGURE_ARGS+=	--disable-llvm

Added: head/graphics/mesa-dri/files/patch-9cab8cc.c
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/graphics/mesa-dri/files/patch-9cab8cc.c	Sun Jun 30 14:56:12 2019	(r505425)
@@ -0,0 +1,17 @@
+amd: Make vgpr-spilling depend on llvm version 
+
+https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230789#c14
+diff --git a/src/amd/common/ac_llvm_util.c b/src/amd/common/ac_llvm_util.c
+index 69d9f7b9f3fe9e5feb07b32c35cbcf1206a14ca8..dc9b684e9dd287d5bb558d9ad3868a9d0975228d 100644
+--- src/amd/common/ac_llvm_util.c
++++ src/amd/common/ac_llvm_util.c
+@@ -153,7 +153,8 @@ static LLVMTargetMachineRef ac_create_target_machine(enum radeon_family family,
+ 	LLVMTargetRef target = ac_get_llvm_target(triple);
+ 
+ 	snprintf(features, sizeof(features),
+-		 "+DumpCode,+vgpr-spilling,-fp32-denormals,+fp64-denormals%s%s%s%s",
++		 "+DumpCode,-fp32-denormals,+fp64-denormals%s%s%s%s%s",
++		 HAVE_LLVM >= 0x0800 ? "" : ",+vgpr-spilling",
+ 		 tm_options & AC_TM_SISCHED ? ",+si-scheduler" : "",
+ 		 tm_options & AC_TM_FORCE_ENABLE_XNACK ? ",+xnack" : "",
+ 		 tm_options & AC_TM_FORCE_DISABLE_XNACK ? ",-xnack" : "",

Modified: head/graphics/mesa-libs/Makefile
==============================================================================
--- head/graphics/mesa-libs/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/graphics/mesa-libs/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -3,6 +3,7 @@
 
 PORTNAME=	mesa-libs
 PORTVERSION=	${MESAVERSION}
+PORTREVISION=	1
 CATEGORIES=	graphics
 
 COMMENT=	OpenGL libraries that support GLX and EGL clients

Modified: head/lang/beignet/Makefile
==============================================================================
--- head/lang/beignet/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/lang/beignet/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -4,7 +4,7 @@
 PORTNAME=	beignet
 DISTVERSION=	1.3.2
 DISTVERSIONSUFFIX=	-source
-PORTREVISION=	6
+PORTREVISION=	7
 CATEGORIES=	lang
 MASTER_SITES=	https://01.org/sites/default/files/
 
@@ -14,12 +14,12 @@ COMMENT=	OpenCL library for Intel GPUs
 LICENSE=	LGPL21+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-BUILD_DEPENDS=	clang${LLVMVER}:devel/llvm${LLVMVER} \
+BUILD_DEPENDS=	clang${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT} \
 		opencl>=0:devel/opencl
 LIB_DEPENDS=	libOpenCL.so:devel/ocl-icd \
 		libdrm.so:graphics/libdrm
 RUN_DEPENDS=	opencl>=0:devel/opencl \
-		clang${LLVMVER}:devel/llvm${LLVMVER}
+		clang${LLVM_DEFAULT}:devel/llvm${LLVM_DEFAULT}
 
 WRKSRC=		${WRKDIR}/Beignet-${DISTVERSION}-Source
 
@@ -29,12 +29,11 @@ USE_GL=		gl egl
 USE_LDCONFIG=	${LOCALBASE}/lib/${PORTNAME}
 SHEBANG_FILES=	src/git_sha1.sh backend/kernels/compile.sh
 ALL_TARGET=	all
-LLVMVER=	${MESA_LLVM_VER:U60}
 
-CMAKE_ARGS=	-DCLANG_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/clang${LLVMVER} \
-		-DLLVM_AS_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-as${LLVMVER} \
-		-DLLVM_CONFIG_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-config${LLVMVER} \
-		-DLLVM_LINK_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-link${LLVMVER}
+CMAKE_ARGS=	-DCLANG_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/clang${LLVM_DEFAULT} \
+		-DLLVM_AS_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-as${LLVM_DEFAULT} \
+		-DLLVM_CONFIG_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-config${LLVM_DEFAULT} \
+		-DLLVM_LINK_EXECUTABLE:FILEPATH=${LOCALBASE}/bin/llvm-link${LLVM_DEFAULT}
 
 ONLY_FOR_ARCHS=	i386 amd64
 ONLY_FOR_ARCHS_REASON=	Beignet needs a graphics driver supported by the Intel KMS driver
@@ -53,8 +52,8 @@ OCL20_CMAKE_BOOL=	ENABLE_OPENCL_20
 TEST_ALL_TARGET=	flat_address_space utest_run
 
 post-patch:
-	@${REINPLACE_CMD} -e 's|llvm-dis|llvm-dis${LLVMVER}|g; \
-		s|clang |clang${LLVMVER} |g' \
+	@${REINPLACE_CMD} -e 's|llvm-dis|llvm-dis${LLVM_DEFAULT}|g; \
+		s|clang |clang${LLVM_DEFAULT} |g' \
 		${WRKSRC}/backend/kernels/compile.sh
 
 # XXX bug 213732: compiler_device_enqueue() Interrupt signal (SIGSEGV) received.

Added: head/lang/beignet/files/patch-llvm8
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ head/lang/beignet/files/patch-llvm8	Sun Jun 30 14:56:12 2019	(r505425)
@@ -0,0 +1,51 @@
+Regressed by https://github.com/llvm/llvm-project/commit/721d95713a9e
+
+unable to load /usr/local/lib/beignet//libgbeinterp.so which is part of the driver, please check!
+ld-elf.so.1: /usr/local/lib/beignet//libgbeinterp.so: Undefined symbol "_ZN4llvm24DisableABIBreakingChecksE"
+
+Regressed by https://github.com/llvm/llvm-project/commit/4a2d58e16acc
+
+backend/src/llvm/llvm_gen_backend.cpp:3076:5: error:
+      unknown type name 'TerminatorInst'
+    TerminatorInst *term = bb->getTerminator();
+    ^
+backend/src/llvm/llvm_gen_backend.cpp:3083:5: error:
+      unknown type name 'TerminatorInst'
+    TerminatorInst *term = bb->getTerminator();
+    ^
+
+--- backend/src/CMakeLists.txt.orig	2017-09-22 08:05:22 UTC
++++ backend/src/CMakeLists.txt
+@@ -168,6 +168,7 @@ add_dependencies(gbe beignet_bitcode)
+ endif (NOT (USE_STANDALONE_GBE_COMPILER STREQUAL "true"))
+ 
+ add_library(gbeinterp SHARED gbe_bin_interpreter.cpp)
++target_link_libraries(gbeinterp ${LLVM_MODULE_LIBS})
+ 
+ if (LLVM_VERSION_NODOT VERSION_EQUAL 34)
+   find_library(TERMINFO NAMES tinfo ncurses)
+--- backend/src/llvm/llvm_gen_backend.cpp.orig	2017-10-24 06:04:48 UTC
++++ backend/src/llvm/llvm_gen_backend.cpp
+@@ -3073,14 +3073,22 @@ namespace gbe
+ 
+ 
+   static unsigned getChildNo(BasicBlock *bb) {
++#if LLVM_VERSION_MAJOR < 8
+     TerminatorInst *term = bb->getTerminator();
++#else
++    Instruction *term = bb->getTerminator();
++#endif
+     return term->getNumSuccessors();
+   }
+ 
+   // return NULL if index out-range of children number
+   static BasicBlock *getChildPossible(BasicBlock *bb, unsigned index) {
+ 
++#if LLVM_VERSION_MAJOR < 8
+     TerminatorInst *term = bb->getTerminator();
++#else
++    Instruction *term = bb->getTerminator();
++#endif
+     unsigned childNo = term->getNumSuccessors();
+     BasicBlock *child = NULL;
+     if(index < childNo) {

Modified: head/lang/clover/Makefile
==============================================================================
--- head/lang/clover/Makefile	Sun Jun 30 14:44:14 2019	(r505424)
+++ head/lang/clover/Makefile	Sun Jun 30 14:56:12 2019	(r505425)
@@ -2,7 +2,7 @@
 
 PORTNAME=	clover
 PORTVERSION=	${MESAVERSION}
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	lang
 
 COMMENT=	Mesa "Clover" OpenCL library
@@ -31,9 +31,9 @@ MESA_INSTALL_WRKSRC=	src/gallium/targets/opencl src/ga
 .include "${MASTERDIR}/Makefile.targets"
 
 pre-configure:
-	@if [ -e ${LOCALBASE}/bin/llvm-config${MESA_LLVM_VER} ] && \
-		! [ -e ${LOCALBASE}/bin/clang${MESA_LLVM_VER} ]; then \
-		${ECHO_MSG} "Your llvm${MESA_LLVM_VER} is not built with clang support, which is required."; \
+	@if [ -e ${LOCALBASE}/bin/llvm-config${LLVM_DEFAULT} ] && \
+		! [ -e ${LOCALBASE}/bin/clang${LLVM_DEFAULT} ]; then \
+		${ECHO_MSG} "Your llvm${LLVM_DEFAULT} is not built with clang support, which is required."; \
 		${FALSE}; \
 	fi
 



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