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package/libclc: new package

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This patch provides libclc, an open source implementation of the
library requirements of the OpenCL C programming language, as
specified by the OpenCL 1.1 Specification. It is intended to be used
with Clover (Mesa3D's OpenCL implementation for AMD GPUs.

It needs to be compiled with host-clang, as it generates LLVM IR bitcode
files containing device builtin functions for each target.

Currently, libclc supports AMDGCN, R600 and NVPTX targets.

As OpenCL kernels can be built dynamically on the target using libclang and
libLLVM, it is necessary to have clc headers installed on the target. Buildroot
removes /usr/include in its target-finalize step, so clc headers are installed to
/usr/share/clc.

Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Signed-off-by: Valentin Korenblit <valentinkorenblit@gmail.com>
Reviewed-by: Romain Naour <romain.naour@smile.fr>
[Thomas:
 - fix license information as noticed by Romain
 - add comment to explain why --includedir=/usr/share is used]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Valentin Korenblit 2018-10-20 16:34:49 +02:00 committed by Thomas Petazzoni
parent 826b57a170
commit f265e5d905
5 changed files with 62 additions and 0 deletions
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1
DEVELOPERS
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@ -2119,6 +2119,7 @@ F: package/tstools/
N: Valentin Korenblit <valentinkorenblit@gmail.com>
F: package/clang/
F: package/libclc/
F: package/llvm/
N: Vanya Sergeev <vsergeev@gmail.com>

1
package/Config.in
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@ -1618,6 +1618,7 @@ menu "Other"
source "package/libcap/Config.in"
source "package/libcap-ng/Config.in"
source "package/libcgroup/Config.in"
source "package/libclc/Config.in"
source "package/libcofi/Config.in"
source "package/libcorrect/Config.in"
source "package/libcroco/Config.in"

10
package/libclc/Config.in Normal file
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@ -0,0 +1,10 @@
config BR2_PACKAGE_LIBCLC
bool "libclc"
depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
depends on BR2_HOST_GCC_AT_LEAST_4_8
help
libclc is an open source, BSD licensed implementation of
the library requirements of the OpenCL C programming language,
as specified by the OpenCL 1.1 Specification.
http://libclc.llvm.org/

3
package/libclc/libclc.hash Normal file
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@ -0,0 +1,3 @@
# locally calculated
sha256 8d7b42fba6db4a124c74f0ac475c1bc515761cbf3d559820b4cbe5b33e94f26c libclc-dabae5a2afb78cba0320a86e3f5f0b5dc83e077c.tar.gz
sha256 45187a46f0637e4e92decb51d8dc3c9e4957b349d0283dfbd6647e8000d9ac7f LICENSE.TXT

47
package/libclc/libclc.mk Normal file
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@ -0,0 +1,47 @@
################################################################################
#
# libclc
#
################################################################################
# There are only two releases: release_35 and release_38, but the last
# commit is from 2 years ago. Master has some recent activity.
LIBCLC_VERSION = dabae5a2afb78cba0320a86e3f5f0b5dc83e077c
LIBCLC_SITE = https://git.llvm.org/git/libclc
LIBCLC_SITE_METHOD = git
LIBCLC_LICENSE = NCSA or MIT
LIBCLC_LICENSE_FILES = LICENSE.TXT
LIBCLC_DEPENDENCIES = host-clang host-llvm
LIBCLC_INSTALL_STAGING = YES
# C++ compiler is used to build a small tool (prepare-builtins) for the host.
# It must be built with the C++ compiler from the host.
#
# The headers are installed in /usr/share and not /usr/include,
# because they are needed at runtime on the target to build the OpenCL
# kernels.
LIBCLC_CONF_OPTS = \
--with-llvm-config=$(HOST_DIR)/usr/bin/llvm-config \
--prefix=/usr \
--includedir=/usr/share \
--pkgconfigdir=/usr/lib/pkgconfig \
--with-cxx-compiler=$(HOSTCXX)
define LIBCLC_CONFIGURE_CMDS
(cd $(@D); $(TARGET_CONFIGURE_OPTS) ./configure.py $(LIBCLC_CONF_OPTS))
endef
define LIBCLC_BUILD_CMDS
$(TARGET_MAKE_ENV) $(MAKE) -C $(@D)
endef
define LIBCLC_INSTALL_TARGET_CMDS
$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) DESTDIR=$(TARGET_DIR) install
endef
define LIBCLC_INSTALL_STAGING_CMDS
$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) DESTDIR=$(STAGING_DIR) install
endef
$(eval $(generic-package))