[Buildroot] [PATCH v4 09/11] package/libclc: new package

[Valentin Korenblit <valentin.korenblit@smile.fr>]

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>
---
 DEVELOPERS               |  1 +
 package/Config.in        |  1 +
 package/libclc/Config.in |  9 +++++++++
 package/libclc/libclc.mk | 38 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 49 insertions(+)
 create mode 100644 package/libclc/Config.in
 create mode 100644 package/libclc/libclc.mk

diff --git a/DEVELOPERS b/DEVELOPERS
index 47aa2dd82a..6bcafb6d2a 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1860,6 +1860,7 @@ 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 4d32d749fb..bc2228ed17 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.mk b/package/libclc/libclc.mk
new file mode 100644
index 0000000000..b8b4dca273
--- /dev/null
+++ b/package/libclc/libclc.mk
@@ -0,0 +1,38 @@
+################################################################################
+#
+# libclc
+#
+################################################################################
+
+LIBCLC_VERSION = 00236279a293b3737dee08c14f25923a889d2795
+LIBCLC_SITE = https://git.llvm.org/git/libclc
+LIBCLC_SITE_METHOD = git
+
+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, simply use
+# HOSTCXX_NOCCACHE.
+LIBCLC_CONF_OPTS = --with-llvm-config=$(HOST_DIR)/usr/bin/llvm-config \
+	--prefix="/usr" \
+	--pkgconfigdir="/usr/lib/pkgconfig" \
+	--with-cxx-compiler='$(HOSTCXX_NOCCACHE)'
+
+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))
-- 
2.14.3