[oe] [meta-oe][PATCH v1 3/4] BCC: Add build recipe

[Khem Raj]

On Mon, Feb 17, 2020 at 9:27 PM Leo Yan <leo.yan at linaro.org> wrote:
>
> From: Sumit Garg <sumit.garg at linaro.org>
>
> BPF Compiler Collection (BCC) is a toolkit for creating efficient kernel
> tracing and manipulation programs, and includes versatile tools and
> examples which based on eBPF.  This tool is very widely used on server
> section, but we also can use it for embedded system, e.g. use its
> function trace utilities (trace.py and argdist.py) to trace kernel
> function parameters and return values.
>
> This patch adds recipe for BCC version 0.12.0.  This patch also contains
> a patch to change cmake file so can look for libraries and headers which
> are installed in target sysroot-recipe path for cross compilation.
>
> Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
> Co-developed-by: Leo Yan <leo.yan at linaro.org>
> ---
>  ...-with-OE-LLVM-cross-compiled-package.patch | 32 ++++++++++++++++
>  meta-oe/recipes-devtools/bcc/bcc_0.12.0.bb    | 37 +++++++++++++++++++
>  2 files changed, 69 insertions(+)
>  create mode 100644 meta-oe/recipes-devtools/bcc/bcc/0001-Allow-to-build-with-OE-LLVM-cross-compiled-package.patch
>  create mode 100644 meta-oe/recipes-devtools/bcc/bcc_0.12.0.bb
>
> diff --git a/meta-oe/recipes-devtools/bcc/bcc/0001-Allow-to-build-with-OE-LLVM-cross-compiled-package.patch b/meta-oe/recipes-devtools/bcc/bcc/0001-Allow-to-build-with-OE-LLVM-cross-compiled-package.patch
> new file mode 100644
> index 000000000..b5acadc1b
> --- /dev/null
> +++ b/meta-oe/recipes-devtools/bcc/bcc/0001-Allow-to-build-with-OE-LLVM-cross-compiled-package.patch
> @@ -0,0 +1,32 @@
> +From 93cf25ba663e68a6a6f4237fbe0ef8349b3f37ef Mon Sep 17 00:00:00 2001
> +From: Sumit Garg <sumit.garg at linaro.org>
> +Date: Fri, 14 Feb 2020 07:40:11 +0000
> +Subject: [PATCH] Allow to build with OE LLVM cross compiled package
> +
> +The default LLVM cmake package requires all libraries, headers and tools
> +to be present but in case of cross compilation, OE only provides
> +target specific libraries and headers and requires native llvm tools.
> +
> +So instead of looking for a complete llvm package, look for libraries and
> +headers which are installed in target sysroot-recipe path.
> +
> +Signed-off-by: Sumit Garg <sumit.garg at linaro.org>
> +---
> + CMakeLists.txt | 2 --
> + 1 file changed, 2 deletions(-)
> +
> +diff --git a/CMakeLists.txt b/CMakeLists.txt
> +index 7bd0f3b2..6f1f12c0 100644
> +--- a/CMakeLists.txt
> ++++ b/CMakeLists.txt
> +@@ -39,8 +39,6 @@ endif()
> + if(NOT PYTHON_ONLY AND ENABLE_CLANG_JIT)
> + find_package(BISON)
> + find_package(FLEX)
> +-find_package(LLVM REQUIRED CONFIG)
> +-message(STATUS "Found LLVM: ${LLVM_INCLUDE_DIRS} ${LLVM_PACKAGE_VERSION}")
> + find_package(LibElf REQUIRED)
> +
> + # clang is linked as a library, but the library path searching is
> +--
> +2.17.1
> diff --git a/meta-oe/recipes-devtools/bcc/bcc_0.12.0.bb b/meta-oe/recipes-devtools/bcc/bcc_0.12.0.bb
> new file mode 100644
> index 000000000..687fb64c7
> --- /dev/null
> +++ b/meta-oe/recipes-devtools/bcc/bcc_0.12.0.bb
> @@ -0,0 +1,37 @@
> +SUMMARY = "BPF Compiler Collection (BCC)"
> +HOMEPAGE = "https://github.com/iovisor/bcc"
> +LICENSE = "Apache-2.0"
> +LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=e3fc50a88d0a364313df4b21ef20c29e"
> +
> +DEPENDS += "bison-native \
> +            ninja-native \
> +            elfutils-native \
> +            flex-native \
> +            ${MLPREFIX}elfutils \
> +            ${MLPREFIX}binutils \
> +            ${MLPREFIX}flex \
> +            luajit \
> +            clang \
> +            "
> +

this will add meta-clang dependency directly into meta-oe, which is not desired
is it possible to make it optional or perhaps marked when meta-clang
is not in BBLAYERS

> +RDEPENDS_${PN} += "bash python"
> +
> +SRC_URI = "git://github.com/iovisor/bcc \
> +           file://0001-Allow-to-build-with-OE-LLVM-cross-compiled-package.patch \
> +           "
> +SRCREV = "368a5b0714961953f3e3f61607fa16cb71449c1b"
> +
> +S = "${WORKDIR}/git"
> +
> +inherit cmake
> +
> +EXTRA_OECMAKE = " \
> +    -DCMAKE_INSTALL_PREFIX=/usr \
> +    -DENABLE_LLVM_SHARED=ON \
> +    -DENABLE_CLANG_JIT=ON \
> +    -DENABLE_MAN=OFF \
> +    -DLLVM_PACKAGE_VERSION=${LLVMVERSION} \
> +    -DPYTHON_CMD=python3 \
> +"
> +
> +FILES_${PN} += "${libdir}/python*/dist-packages"
> --
> 2.17.1
>
> --
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