[v5,5/7] package/libclc: new package

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 Mesa Clover.

It needs to be compiled with 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 are built dynamically on the target using libclang and
libLLVM, it is necessary to copy /usr/include/clc from STAGING_DIR to the
target manually, as Buildroot doesn't include this directory.

Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
---

This patch should not yet be applied, we must first find a place
where clc headers can be stored.

 DEVELOPERS                 |  1 +
 package/Config.in          |  1 +
 package/libclc/Config.in   |  9 +++++++++
 package/libclc/libclc.hash |  3 +++
 package/libclc/libclc.mk   | 41 +++++++++++++++++++++++++++++++++++++++++
 5 files changed, 55 insertions(+)
 create mode 100644 package/libclc/Config.in
 create mode 100644 package/libclc/libclc.hash
 create mode 100644 package/libclc/libclc.mk

Hi all,

Le 04/04/2018 à 18:31, Valentin Korenblit a écrit :
> 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 Mesa Clover.
> 
> It needs to be compiled with 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 are built dynamically on the target using libclang and
> libLLVM, it is necessary to copy /usr/include/clc from STAGING_DIR to the
> target manually, as Buildroot doesn't include this directory.
> 
> Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
> ---
> 
> This patch should not yet be applied, we must first find a place
> where clc headers can be stored.

I'll mark remaining patches of this series "Changes requested" since Valentin is
working on a v6 of this series, taking into account the llvm dependencies
recently added and some other fixes.

Also he will try to find a workaround for the clc headers.
For now, clc headers must be copied to /usr/include/clc but this location is
removed by Buildroot at the end of the build.

Best regards,
Romain

> 
>  DEVELOPERS                 |  1 +
>  package/Config.in          |  1 +
>  package/libclc/Config.in   |  9 +++++++++
>  package/libclc/libclc.hash |  3 +++
>  package/libclc/libclc.mk   | 41 +++++++++++++++++++++++++++++++++++++++++
>  5 files changed, 55 insertions(+)
>  create mode 100644 package/libclc/Config.in
>  create mode 100644 package/libclc/libclc.hash
>  create mode 100644 package/libclc/libclc.mk
> 
> diff --git a/DEVELOPERS b/DEVELOPERS
> index 72303992c2..ec8f73681a 100644
> --- a/DEVELOPERS
> +++ b/DEVELOPERS
> @@ -1889,6 +1889,7 @@ F:	package/tstools/
>  
>  N:	Valentin Korenblit <valentin.korenblit@smile.fr>
>  F:	package/clang/
> +F:	package/libclc/
>  F:	package/llvm/
>  
>  N:	Vanya Sergeev <vsergeev@gmail.com>
> diff --git a/package/Config.in b/package/Config.in
> index b358e39c3f..3cd979661f 100644
> --- a/package/Config.in
> +++ b/package/Config.in
> @@ -281,6 +281,7 @@ comment "Graphic libraries"
>  	source "package/fbv/Config.in"
>  	source "package/freerdp/Config.in"
>  	source "package/imagemagick/Config.in"
> +	source "package/libclc/Config.in"
>  	source "package/linux-fusion/Config.in"
>  	source "package/lite/Config.in"
>  	source "package/mesa3d/Config.in"
> diff --git a/package/libclc/Config.in b/package/libclc/Config.in
> new file mode 100644
> index 0000000000..797f090bfc
> --- /dev/null
> +++ b/package/libclc/Config.in
> @@ -0,0 +1,9 @@
> +config BR2_PACKAGE_LIBCLC
> +	bool "libclc"
> +	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
> +	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/
> diff --git a/package/libclc/libclc.hash b/package/libclc/libclc.hash
> new file mode 100644
> index 0000000000..c5bf5a668c
> --- /dev/null
> +++ b/package/libclc/libclc.hash
> @@ -0,0 +1,3 @@
> +# locally calculated
> +sha256 e2f1f294f93695f2d1f87ccb9760231b435702dd0c27abeb38baa97186674d9e  libclc-00236279a293b3737dee08c14f25923a889d2795.tar.gz
> +sha256 c66aa55d8478b45f1018500af9f433dd271444ad304d683dd49ff2a42f30dad1  LICENSE.TXT
> diff --git a/package/libclc/libclc.mk b/package/libclc/libclc.mk
> new file mode 100644
> index 0000000000..35a69ea360
> --- /dev/null
> +++ b/package/libclc/libclc.mk
> @@ -0,0 +1,41 @@
> +################################################################################
> +#
> +# 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 = 00236279a293b3737dee08c14f25923a889d2795
> +LIBCLC_SITE = https://git.llvm.org/git/libclc
> +LIBCLC_SITE_METHOD = git
> +LIBCLC_LICENSE = NCSA
> +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
> +LIBCLC_CONF_OPTS = --with-llvm-config=$(HOST_DIR)/usr/bin/llvm-config \
> +	--prefix="/usr" \
> +	--pkgconfigdir="/usr/lib/pkgconfig" \
> +	--with-cxx-compiler=$(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))
>