[Buildroot] [PATCH v8] package/sysdig: New package

[Ryan Barnett <ryan.barnett@rockwellcollins.com>]

Angelo,

Sorry for the noise before I have now had a change to actually
download and try your patch out. Please see the issues that I have had
when just doing a build with 'make sysdig'

On Wed, Mar 25, 2015 at 5:53 AM, Angelo Compagnucci
<angelo.compagnucci@gmail.com> wrote:
>
> diff --git a/package/sysdig/0001-makefile-driver-compile-options.patch b/package/sysdig/0001-makefile-driver-compile-options.patch
> new file mode 100644
> index 0000000..b3444ad
> --- /dev/null
> +++ b/package/sysdig/0001-makefile-driver-compile-options.patch
> @@ -0,0 +1,23 @@
> +Updated Makefile compile options
> +
> +This patch updates linux kernel module (driver) of sysdig to be
> +compatible with buildroot compile flags.
> +
> +Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
> +
> +--- a/driver/Makefile.in
> ++++ b/driver/Makefile.in
> +@@ -6,10 +6,10 @@ KERNELDIR            ?= /lib/modules/$(shell uname -r)/build
> +
> + TOP := $(shell pwd)
> + all:
> +-      $(MAKE) -C $(KERNELDIR) M=$(TOP) modules
> ++      $(MAKE) $(LINUX_MAKE_FLAGS) -C $(KERNELDIR) M=$(TOP) modules

This doesn't work because when I do a build and run file on the .ko I
get the following:

$ file build/sysdig-0.1.99/buildroot-build/driver/sysdig-probe.ko
build/sysdig-0.1.99/buildroot-build/driver/sysdig-probe.ko: ELF 64-bit
LSB  relocatable, x86-64, version 1 (SYSV),
BuildID[sha1]=0ea061af98e9fd2b5ba04d2be1c309833a20217a, not stripped

My target was a Cortex-A5 (arm 32-bit LE). So this patch isn't working
because I think KERNELDIR is being set by above to /lib/modules$(shell
uname -r)/build

So in order to use this patch with buildroot we need to modify the
sysdig.mk in order to make this work.

> +
> + clean:
> +-      $(MAKE) -C $(KERNELDIR) M=$(TOP) clean
> ++      $(MAKE) $(LINUX_MAKE_FLAGS) -C $(KERNELDIR) M=$(TOP) clean
> +
> + install: all
> +-      $(MAKE) -C $(KERNELDIR) M=$(TOP) modules_install
> ++      $(MAKE) $(LINUX_MAKE_FLAGS) -C $(KERNELDIR) M=$(TOP) modules_install

[...]

> diff --git a/package/sysdig/sysdig.mk b/package/sysdig/sysdig.mk
> new file mode 100644
> index 0000000..769cfe2
> --- /dev/null
> +++ b/package/sysdig/sysdig.mk
> @@ -0,0 +1,16 @@
> +################################################################################
> +#
> +# sysdig
> +#
> +################################################################################
> +
> +SYSDIG_VERSION = 0.1.99
> +SYSDIG_SITE = $(call github,draios,sysdig,$(SYSDIG_VERSION))
> +SYSDIG_LICENSE = GPLv2
> +SYSDIG_LICENSE_FILES = COPYING
> +SYSDIG_CONF_OPTS = -DUSE_BUNDLED_LUAJIT=OFF -DUSE_BUNDLED_ZLIB=OFF \
> +       -DUSE_BUNDLED_JSONCPP=OFF

In order to make sure the kernel driver is actually cross compiling
with buildroot's kernel I had to add the following:

SYSDIG_MAKE_ENV = KERNELDIR="$(LINUX_SRCDIR)" \
          LINUX_MAKE_FLAGS='$(LINUX_MAKE_FLAGS)'

(Note: spacing should be a tab).


> +SYSDIG_DEPENDENCIES = zlib luajit libjson linux

I think your dependancy should be on 'jsoncpp' instead of libjson. I
was unable to detect jsoncpp in the configure step when just running:

'make sysdig'

> +SYSDIG_SUPPORTS_IN_SOURCE_BUILD = NO
> +
> +$(eval $(cmake-package))

Thanks,
-Ryan

-- 
Ryan Barnett / Sr Software Engineer
Airborne Information Systems / Security Systems and Software
MS 131-100, C Ave NE, Cedar Rapids, IA, 52498, USA
ryan.barnett at rockwellcollins.com
www.rockwellcollins.com