diff mbox series

[v7,4/5] package/compiler-rt: new package

Message ID 20190501194032.765-5-matthew.weber@rockwellcollins.com
State Superseded
Headers show
Series Compiler-rt Security Fuzzing Support | expand

Commit Message

Matt Weber May 1, 2019, 7:40 p.m. UTC 
This patch adds support for the compiler-rt (CLANG runtime) library.
It builds a set of static libraries and installs them into the
CLANG/LLVM toolchain resource folder.

Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
Cc: Romain Naour <romain.naour@smile.fr>
Cc: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Cc: Valentin Korenblit <valentinkorenblit@gmail.com>
---
Changes
v1 -> v2
[Romain
 - Removed unnecessary host-cmake dependency

v2 -> v3
[Romain
 - Update to use COMPILER_RT_INSTALL_PATH for library install
[Ricardo
 - Fixed check-package extra line
 - Spelling in commit message

v3 -> v4
[Valentin
 - Pointed out that non-glibc libraries won't build. Further
   investigation shows that the lib asan support in compiler-rt
   doesn't have the libc checks yet to support multiple libraries.
   (https://patchwork.ozlabs.org/patch/339938/ was the best example
    I could find and it doesn't look like anything has changed in the
    recent codebase)

v4 -> v5
[Thomas P
 - Revisited staging install step and found a cleaner way to use the
   default and then a hook to setup the runtime library path

v6
 - Bumped to 7.0.1 to match current LLVM/Clang version

v7
 - Rebased on master for 8.0 LLVM/Clang version
 - Added comment about bumping verions of LLVM/Clang and Compiler-rt
   together
[Romain
 - Disabled test cases (-DCOMPILER_RT_INCLUDE_TESTS=OFF)
---
 DEVELOPERS                           |  1 +
 package/Config.in                    |  1 +
 package/clang/clang.mk               |  2 +-
 package/compiler-rt/Config.in        | 14 +++++++++++
 package/compiler-rt/compiler-rt.hash |  3 +++
 package/compiler-rt/compiler-rt.mk   | 36 ++++++++++++++++++++++++++++
 package/llvm/llvm.mk                 |  2 +-
 7 files changed, 57 insertions(+), 2 deletions(-)
 create mode 100644 package/compiler-rt/Config.in
 create mode 100644 package/compiler-rt/compiler-rt.hash
 create mode 100644 package/compiler-rt/compiler-rt.mk

Comments

Romain Naour May 7, 2019, 11:54 a.m. UTC | #1 
Le 01/05/2019 à 21:40, Matt Weber a écrit :
> This patch adds support for the compiler-rt (CLANG runtime) library.
> It builds a set of static libraries and installs them into the
> CLANG/LLVM toolchain resource folder.
> 
> Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
> Cc: Romain Naour <romain.naour@smile.fr>
> Cc: Ricardo Martincoski <ricardo.martincoski@gmail.com>
> Cc: Valentin Korenblit <valentinkorenblit@gmail.com>
> ---
> Changes
> v1 -> v2
> [Romain
>  - Removed unnecessary host-cmake dependency
> 
> v2 -> v3
> [Romain
>  - Update to use COMPILER_RT_INSTALL_PATH for library install
> [Ricardo
>  - Fixed check-package extra line
>  - Spelling in commit message
> 
> v3 -> v4
> [Valentin
>  - Pointed out that non-glibc libraries won't build. Further
>    investigation shows that the lib asan support in compiler-rt
>    doesn't have the libc checks yet to support multiple libraries.
>    (https://patchwork.ozlabs.org/patch/339938/ was the best example
>     I could find and it doesn't look like anything has changed in the
>     recent codebase)
> 
> v4 -> v5
> [Thomas P
>  - Revisited staging install step and found a cleaner way to use the
>    default and then a hook to setup the runtime library path
> 
> v6
>  - Bumped to 7.0.1 to match current LLVM/Clang version
> 
> v7
>  - Rebased on master for 8.0 LLVM/Clang version
>  - Added comment about bumping verions of LLVM/Clang and Compiler-rt
>    together
> [Romain
>  - Disabled test cases (-DCOMPILER_RT_INCLUDE_TESTS=OFF)
> ---
>  DEVELOPERS                           |  1 +
>  package/Config.in                    |  1 +
>  package/clang/clang.mk               |  2 +-
>  package/compiler-rt/Config.in        | 14 +++++++++++
>  package/compiler-rt/compiler-rt.hash |  3 +++
>  package/compiler-rt/compiler-rt.mk   | 36 ++++++++++++++++++++++++++++
>  package/llvm/llvm.mk                 |  2 +-
>  7 files changed, 57 insertions(+), 2 deletions(-)
>  create mode 100644 package/compiler-rt/Config.in
>  create mode 100644 package/compiler-rt/compiler-rt.hash
>  create mode 100644 package/compiler-rt/compiler-rt.mk
> 
> diff --git a/DEVELOPERS b/DEVELOPERS
> index 6ccb0afaf6..72a635a81a 100644
> --- a/DEVELOPERS
> +++ b/DEVELOPERS
> @@ -1467,6 +1467,7 @@ F:	package/bridge-utils/
>  F:	package/checkpolicy/
>  F:	package/checksec/
>  F:	package/cgroupfs-mount/
> +F:	package/compiler-rt/
>  F:	package/crda/
>  F:	package/cunit/
>  F:	package/dacapo/
> diff --git a/package/Config.in b/package/Config.in
> index f592e74a99..99fcf49a63 100644
> --- a/package/Config.in
> +++ b/package/Config.in
> @@ -1652,6 +1652,7 @@ menu "Other"
>  	source "package/clapack/Config.in"
>  	source "package/classpath/Config.in"
>  	source "package/cmocka/Config.in"
> +	source "package/compiler-rt/Config.in"
>  	source "package/cppcms/Config.in"
>  	source "package/cracklib/Config.in"
>  	source "package/dawgdic/Config.in"
> diff --git a/package/clang/clang.mk b/package/clang/clang.mk
> index 07e7fced2a..87a80ab258 100644
> --- a/package/clang/clang.mk
> +++ b/package/clang/clang.mk
> @@ -4,7 +4,7 @@
>  #
>  ################################################################################
>  
> -# LLVM and Clang should be version bumped together
> +# LLVM, Compiler-rt and Clang should be version bumped together
>  CLANG_VERSION = 8.0.0
>  CLANG_SITE = http://llvm.org/releases/$(CLANG_VERSION)
>  CLANG_SOURCE = cfe-$(CLANG_VERSION).src.tar.xz
> diff --git a/package/compiler-rt/Config.in b/package/compiler-rt/Config.in
> new file mode 100644
> index 0000000000..9afc0d9d60
> --- /dev/null
> +++ b/package/compiler-rt/Config.in
> @@ -0,0 +1,14 @@
> +config BR2_PACKAGE_COMPILER_RT
> +	bool "compiler-rt"
> +	depends on BR2_PACKAGE_LLVM
> +	depends on BR2_TOOLCHAIN_USES_GLIBC # asan lib requires
> +	help
> +	  A collection of runtime libraries primarily used by clang and
> +	  llvm to provide builtins, sanitizer runtimes, and profiling
> +	  at runtime.
> +
> +	  https://compiler-rt.llvm.org/
> +
> +comment "compiler-rt requires llvm to be enabled and a glibc toolchain"
> +	depends on !BR2_PACKAGE_LLVM
> +	depends on !BR2_TOOLCHAIN_USES_GLIBC
> diff --git a/package/compiler-rt/compiler-rt.hash b/package/compiler-rt/compiler-rt.hash
> new file mode 100644
> index 0000000000..4b6bd1a75e
> --- /dev/null
> +++ b/package/compiler-rt/compiler-rt.hash
> @@ -0,0 +1,3 @@
> +# Locally computed:
> +sha256 782edfc119ee172f169c91dd79f2c964fb6b248bd9b73523149030ed505bbe18  compiler-rt-7.0.1.src.tar.xz
> +sha256 417541d990edb3f96327ac03cb67e52eac80fc5c3e7afc69213cd04d7c3b9b27  LICENSE.TXT

The hashes must be updated after the bump to llvm/clang 8.0.0 :)

Best regards,
Romain

> diff --git a/package/compiler-rt/compiler-rt.mk b/package/compiler-rt/compiler-rt.mk
> new file mode 100644
> index 0000000000..7eda3bc4fe
> --- /dev/null
> +++ b/package/compiler-rt/compiler-rt.mk
> @@ -0,0 +1,36 @@
> +################################################################################
> +#
> +# compiler-rt
> +#
> +################################################################################
> +
> +# Compiler-RT should be bumped together with LLVM and Clang as the run-time is
> +# tied to the version of those tools
> +COMPILER_RT_VERSION = 8.0.0
> +COMPILER_RT_SOURCE = compiler-rt-$(COMPILER_RT_VERSION).src.tar.xz
> +COMPILER_RT_SITE = http://llvm.org/releases/$(COMPILER_RT_VERSION)
> +COMPILER_RT_LICENSE = NCSA MIT
> +COMPILER_RT_LICENSE_FILES = LICENSE.TXT
> +COMPILER_RT_DEPENDENCIES = host-clang llvm
> +
> +COMPILER_RT_INSTALL_STAGING = YES
> +COMPILER_RT_INSTALL_TARGET = NO
> +
> +COMPILER_RT_CONF_OPTS=-DCOMPILER_RT_STANDALONE_BUILD=OFF \
> +	-DCOMPILER_RT_STANDALONE_BUILD=ON \
> +	-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=$(GNU_TARGET_NAME) \
> +	-DLLVM_CONFIG_PATH=$(HOST_DIR)/usr/bin/llvm-config
> +
> +# The installation of the target runtime libraries defaults to DESTDIR, however
> +# host-clang resources directory needs a link so Clang can find the runtime
> +# libraries in the same location they would be if built as part of the Clang
> +# build. The "resources" directory is loosely documented and seems to be
> +# assumed, as compiler-rt is usually build at the same time as Clang and not
> +# standalone.
> +define COMPILER_RT_SETUP_RUNTIME_LIBS
> +	mkdir -p $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib
> +	ln -sf ../../../../$(GNU_TARGET_NAME)/sysroot/usr/lib/linux $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib/linux
> +endef
> +COMPILER_RT_POST_INSTALL_STAGING_HOOKS += COMPILER_RT_SETUP_RUNTIME_LIBS
> +
> +$(eval $(cmake-package))
> diff --git a/package/llvm/llvm.mk b/package/llvm/llvm.mk
> index 9d276c5190..cd07860068 100644
> --- a/package/llvm/llvm.mk
> +++ b/package/llvm/llvm.mk
> @@ -4,7 +4,7 @@
>  #
>  ################################################################################
>  
> -# LLVM and Clang should be version bumped together
> +# LLVM, Compiler-rt and Clang should be version bumped together
>  LLVM_VERSION = 8.0.0
>  LLVM_SITE = http://llvm.org/releases/$(LLVM_VERSION)
>  LLVM_SOURCE = llvm-$(LLVM_VERSION).src.tar.xz
>
Matt Weber May 7, 2019, 1:19 p.m. UTC | #2 
Romain,

On Tue, May 7, 2019 at 6:54 AM Romain Naour <romain.naour@smile.fr> wrote:
>
> Le 01/05/2019 à 21:40, Matt Weber a écrit :
> > This patch adds support for the compiler-rt (CLANG runtime) library.
> > It builds a set of static libraries and installs them into the
> > CLANG/LLVM toolchain resource folder.
> >
> > Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
> > Cc: Romain Naour <romain.naour@smile.fr>
> > Cc: Ricardo Martincoski <ricardo.martincoski@gmail.com>
> > Cc: Valentin Korenblit <valentinkorenblit@gmail.com>
> > ---
> > Changes
> > v1 -> v2
> > [Romain
> >  - Removed unnecessary host-cmake dependency
> >
> > v2 -> v3
> > [Romain
> >  - Update to use COMPILER_RT_INSTALL_PATH for library install
> > [Ricardo
> >  - Fixed check-package extra line
> >  - Spelling in commit message
> >
> > v3 -> v4
> > [Valentin
> >  - Pointed out that non-glibc libraries won't build. Further
> >    investigation shows that the lib asan support in compiler-rt
> >    doesn't have the libc checks yet to support multiple libraries.
> >    (https://patchwork.ozlabs.org/patch/339938/ was the best example
> >     I could find and it doesn't look like anything has changed in the
> >     recent codebase)
> >
> > v4 -> v5
> > [Thomas P
> >  - Revisited staging install step and found a cleaner way to use the
> >    default and then a hook to setup the runtime library path
> >
> > v6
> >  - Bumped to 7.0.1 to match current LLVM/Clang version
> >
> > v7
> >  - Rebased on master for 8.0 LLVM/Clang version
> >  - Added comment about bumping verions of LLVM/Clang and Compiler-rt
> >    together
> > [Romain
> >  - Disabled test cases (-DCOMPILER_RT_INCLUDE_TESTS=OFF)
> > ---
> >  DEVELOPERS                           |  1 +
> >  package/Config.in                    |  1 +
> >  package/clang/clang.mk               |  2 +-
> >  package/compiler-rt/Config.in        | 14 +++++++++++
> >  package/compiler-rt/compiler-rt.hash |  3 +++
> >  package/compiler-rt/compiler-rt.mk   | 36 ++++++++++++++++++++++++++++
> >  package/llvm/llvm.mk                 |  2 +-
> >  7 files changed, 57 insertions(+), 2 deletions(-)
> >  create mode 100644 package/compiler-rt/Config.in
> >  create mode 100644 package/compiler-rt/compiler-rt.hash
> >  create mode 100644 package/compiler-rt/compiler-rt.mk
> >
> > diff --git a/DEVELOPERS b/DEVELOPERS
> > index 6ccb0afaf6..72a635a81a 100644
> > --- a/DEVELOPERS
> > +++ b/DEVELOPERS
> > @@ -1467,6 +1467,7 @@ F:      package/bridge-utils/
> >  F:   package/checkpolicy/
> >  F:   package/checksec/
> >  F:   package/cgroupfs-mount/
> > +F:   package/compiler-rt/
> >  F:   package/crda/
> >  F:   package/cunit/
> >  F:   package/dacapo/
> > diff --git a/package/Config.in b/package/Config.in
> > index f592e74a99..99fcf49a63 100644
> > --- a/package/Config.in
> > +++ b/package/Config.in
> > @@ -1652,6 +1652,7 @@ menu "Other"
> >       source "package/clapack/Config.in"
> >       source "package/classpath/Config.in"
> >       source "package/cmocka/Config.in"
> > +     source "package/compiler-rt/Config.in"
> >       source "package/cppcms/Config.in"
> >       source "package/cracklib/Config.in"
> >       source "package/dawgdic/Config.in"
> > diff --git a/package/clang/clang.mk b/package/clang/clang.mk
> > index 07e7fced2a..87a80ab258 100644
> > --- a/package/clang/clang.mk
> > +++ b/package/clang/clang.mk
> > @@ -4,7 +4,7 @@
> >  #
> >  ################################################################################
> >
> > -# LLVM and Clang should be version bumped together
> > +# LLVM, Compiler-rt and Clang should be version bumped together
> >  CLANG_VERSION = 8.0.0
> >  CLANG_SITE = http://llvm.org/releases/$(CLANG_VERSION)
> >  CLANG_SOURCE = cfe-$(CLANG_VERSION).src.tar.xz
> > diff --git a/package/compiler-rt/Config.in b/package/compiler-rt/Config.in
> > new file mode 100644
> > index 0000000000..9afc0d9d60
> > --- /dev/null
> > +++ b/package/compiler-rt/Config.in
> > @@ -0,0 +1,14 @@
> > +config BR2_PACKAGE_COMPILER_RT
> > +     bool "compiler-rt"
> > +     depends on BR2_PACKAGE_LLVM
> > +     depends on BR2_TOOLCHAIN_USES_GLIBC # asan lib requires
> > +     help
> > +       A collection of runtime libraries primarily used by clang and
> > +       llvm to provide builtins, sanitizer runtimes, and profiling
> > +       at runtime.
> > +
> > +       https://compiler-rt.llvm.org/
> > +
> > +comment "compiler-rt requires llvm to be enabled and a glibc toolchain"
> > +     depends on !BR2_PACKAGE_LLVM
> > +     depends on !BR2_TOOLCHAIN_USES_GLIBC
> > diff --git a/package/compiler-rt/compiler-rt.hash b/package/compiler-rt/compiler-rt.hash
> > new file mode 100644
> > index 0000000000..4b6bd1a75e
> > --- /dev/null
> > +++ b/package/compiler-rt/compiler-rt.hash
> > @@ -0,0 +1,3 @@
> > +# Locally computed:
> > +sha256 782edfc119ee172f169c91dd79f2c964fb6b248bd9b73523149030ed505bbe18  compiler-rt-7.0.1.src.tar.xz
> > +sha256 417541d990edb3f96327ac03cb67e52eac80fc5c3e7afc69213cd04d7c3b9b27  LICENSE.TXT
>
> The hashes must be updated after the bump to llvm/clang 8.0.0 :)

Good call, I've made that update but it must have slipped out of my
rebase :-)  Will update pending other feedbac.

>
> Best regards,
> Romain
>
> > diff --git a/package/compiler-rt/compiler-rt.mk b/package/compiler-rt/compiler-rt.mk
> > new file mode 100644
> > index 0000000000..7eda3bc4fe
> > --- /dev/null
> > +++ b/package/compiler-rt/compiler-rt.mk
> > @@ -0,0 +1,36 @@
> > +################################################################################
> > +#
> > +# compiler-rt
> > +#
> > +################################################################################
> > +
> > +# Compiler-RT should be bumped together with LLVM and Clang as the run-time is
> > +# tied to the version of those tools
> > +COMPILER_RT_VERSION = 8.0.0
> > +COMPILER_RT_SOURCE = compiler-rt-$(COMPILER_RT_VERSION).src.tar.xz
> > +COMPILER_RT_SITE = http://llvm.org/releases/$(COMPILER_RT_VERSION)
> > +COMPILER_RT_LICENSE = NCSA MIT
> > +COMPILER_RT_LICENSE_FILES = LICENSE.TXT
> > +COMPILER_RT_DEPENDENCIES = host-clang llvm
> > +
> > +COMPILER_RT_INSTALL_STAGING = YES
> > +COMPILER_RT_INSTALL_TARGET = NO
> > +
> > +COMPILER_RT_CONF_OPTS=-DCOMPILER_RT_STANDALONE_BUILD=OFF \
> > +     -DCOMPILER_RT_STANDALONE_BUILD=ON \
> > +     -DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=$(GNU_TARGET_NAME) \
> > +     -DLLVM_CONFIG_PATH=$(HOST_DIR)/usr/bin/llvm-config
> > +
> > +# The installation of the target runtime libraries defaults to DESTDIR, however
> > +# host-clang resources directory needs a link so Clang can find the runtime
> > +# libraries in the same location they would be if built as part of the Clang
> > +# build. The "resources" directory is loosely documented and seems to be
> > +# assumed, as compiler-rt is usually build at the same time as Clang and not
> > +# standalone.
> > +define COMPILER_RT_SETUP_RUNTIME_LIBS
> > +     mkdir -p $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib
> > +     ln -sf ../../../../$(GNU_TARGET_NAME)/sysroot/usr/lib/linux $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib/linux
> > +endef
> > +COMPILER_RT_POST_INSTALL_STAGING_HOOKS += COMPILER_RT_SETUP_RUNTIME_LIBS
> > +
> > +$(eval $(cmake-package))
> > diff --git a/package/llvm/llvm.mk b/package/llvm/llvm.mk
> > index 9d276c5190..cd07860068 100644
> > --- a/package/llvm/llvm.mk
> > +++ b/package/llvm/llvm.mk
> > @@ -4,7 +4,7 @@
> >  #
> >  ################################################################################
> >
> > -# LLVM and Clang should be version bumped together
> > +# LLVM, Compiler-rt and Clang should be version bumped together
> >  LLVM_VERSION = 8.0.0
> >  LLVM_SITE = http://llvm.org/releases/$(LLVM_VERSION)
> >  LLVM_SOURCE = llvm-$(LLVM_VERSION).src.tar.xz
> >
>
diff mbox series

Patch

diff --git a/DEVELOPERS b/DEVELOPERS
index 6ccb0afaf6..72a635a81a 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1467,6 +1467,7 @@  F:	package/bridge-utils/
 F:	package/checkpolicy/
 F:	package/checksec/
 F:	package/cgroupfs-mount/
+F:	package/compiler-rt/
 F:	package/crda/
 F:	package/cunit/
 F:	package/dacapo/
diff --git a/package/Config.in b/package/Config.in
index f592e74a99..99fcf49a63 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -1652,6 +1652,7 @@  menu "Other"
 	source "package/clapack/Config.in"
 	source "package/classpath/Config.in"
 	source "package/cmocka/Config.in"
+	source "package/compiler-rt/Config.in"
 	source "package/cppcms/Config.in"
 	source "package/cracklib/Config.in"
 	source "package/dawgdic/Config.in"
diff --git a/package/clang/clang.mk b/package/clang/clang.mk
index 07e7fced2a..87a80ab258 100644
--- a/package/clang/clang.mk
+++ b/package/clang/clang.mk
@@ -4,7 +4,7 @@ 
 #
 ################################################################################
 
-# LLVM and Clang should be version bumped together
+# LLVM, Compiler-rt and Clang should be version bumped together
 CLANG_VERSION = 8.0.0
 CLANG_SITE = http://llvm.org/releases/$(CLANG_VERSION)
 CLANG_SOURCE = cfe-$(CLANG_VERSION).src.tar.xz
diff --git a/package/compiler-rt/Config.in b/package/compiler-rt/Config.in
new file mode 100644
index 0000000000..9afc0d9d60
--- /dev/null
+++ b/package/compiler-rt/Config.in
@@ -0,0 +1,14 @@ 
+config BR2_PACKAGE_COMPILER_RT
+	bool "compiler-rt"
+	depends on BR2_PACKAGE_LLVM
+	depends on BR2_TOOLCHAIN_USES_GLIBC # asan lib requires
+	help
+	  A collection of runtime libraries primarily used by clang and
+	  llvm to provide builtins, sanitizer runtimes, and profiling
+	  at runtime.
+
+	  https://compiler-rt.llvm.org/
+
+comment "compiler-rt requires llvm to be enabled and a glibc toolchain"
+	depends on !BR2_PACKAGE_LLVM
+	depends on !BR2_TOOLCHAIN_USES_GLIBC
diff --git a/package/compiler-rt/compiler-rt.hash b/package/compiler-rt/compiler-rt.hash
new file mode 100644
index 0000000000..4b6bd1a75e
--- /dev/null
+++ b/package/compiler-rt/compiler-rt.hash
@@ -0,0 +1,3 @@ 
+# Locally computed:
+sha256 782edfc119ee172f169c91dd79f2c964fb6b248bd9b73523149030ed505bbe18  compiler-rt-7.0.1.src.tar.xz
+sha256 417541d990edb3f96327ac03cb67e52eac80fc5c3e7afc69213cd04d7c3b9b27  LICENSE.TXT
diff --git a/package/compiler-rt/compiler-rt.mk b/package/compiler-rt/compiler-rt.mk
new file mode 100644
index 0000000000..7eda3bc4fe
--- /dev/null
+++ b/package/compiler-rt/compiler-rt.mk
@@ -0,0 +1,36 @@ 
+################################################################################
+#
+# compiler-rt
+#
+################################################################################
+
+# Compiler-RT should be bumped together with LLVM and Clang as the run-time is
+# tied to the version of those tools
+COMPILER_RT_VERSION = 8.0.0
+COMPILER_RT_SOURCE = compiler-rt-$(COMPILER_RT_VERSION).src.tar.xz
+COMPILER_RT_SITE = http://llvm.org/releases/$(COMPILER_RT_VERSION)
+COMPILER_RT_LICENSE = NCSA MIT
+COMPILER_RT_LICENSE_FILES = LICENSE.TXT
+COMPILER_RT_DEPENDENCIES = host-clang llvm
+
+COMPILER_RT_INSTALL_STAGING = YES
+COMPILER_RT_INSTALL_TARGET = NO
+
+COMPILER_RT_CONF_OPTS=-DCOMPILER_RT_STANDALONE_BUILD=OFF \
+	-DCOMPILER_RT_STANDALONE_BUILD=ON \
+	-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=$(GNU_TARGET_NAME) \
+	-DLLVM_CONFIG_PATH=$(HOST_DIR)/usr/bin/llvm-config
+
+# The installation of the target runtime libraries defaults to DESTDIR, however
+# host-clang resources directory needs a link so Clang can find the runtime
+# libraries in the same location they would be if built as part of the Clang
+# build. The "resources" directory is loosely documented and seems to be
+# assumed, as compiler-rt is usually build at the same time as Clang and not
+# standalone.
+define COMPILER_RT_SETUP_RUNTIME_LIBS
+	mkdir -p $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib
+	ln -sf ../../../../$(GNU_TARGET_NAME)/sysroot/usr/lib/linux $(HOST_DIR)/lib/clang/$(HOST_CLANG_VERSION)/lib/linux
+endef
+COMPILER_RT_POST_INSTALL_STAGING_HOOKS += COMPILER_RT_SETUP_RUNTIME_LIBS
+
+$(eval $(cmake-package))
diff --git a/package/llvm/llvm.mk b/package/llvm/llvm.mk
index 9d276c5190..cd07860068 100644
--- a/package/llvm/llvm.mk
+++ b/package/llvm/llvm.mk
@@ -4,7 +4,7 @@ 
 #
 ################################################################################
 
-# LLVM and Clang should be version bumped together
+# LLVM, Compiler-rt and Clang should be version bumped together
 LLVM_VERSION = 8.0.0
 LLVM_SITE = http://llvm.org/releases/$(LLVM_VERSION)
 LLVM_SOURCE = llvm-$(LLVM_VERSION).src.tar.xz