[Buildroot] [pull request v2] Pull request for branch for-2012.02/lttng

[Buildroot] [pull request v2] Pull request for branch for-2012.02/lttng

[Thomas Petazzoni]

Hello,

Here is a set of patches that integrate the new generation LTTng
tracing infrastructure into Buildroot. There are several components in
this infrastructure:

 * lttng-modules are kernel modules that implement the kernel side of
   lttng. So far they are compatible with 2.6.38, 2.6.39, 3.0 and 3.1,
   and they don't require any kernel patches, they are simple external
   kernel modules.

 * lttng-tools are the userspace tools to start/stop and configure
   tracing sessions. They are typically installed on the target.

 * liburcu is an implementation of the RCU algorithm in userspace,
   used by lttng-tools.

 * lttng-babeltrace is the utility that allows to convert the binary
   traces generated by lttng-tools into a human-readable text
   format. A host variant of lttng-babeltrace is automatically built
   as a dependency of lttng-tools, because running babeltrace on the
   host machine is probably the most common use case. But building
   lttng-babeltrace for the target is also possible.

 * lttng-libust is an userspace library that allows applications to
   create their own trace events, which are combined with all other
   kernel events by lttng.

Some updates to the popt and util-linux packages are also required in
order to have an host variant of those packages, required to build the
host variant of lttng-babeltrace.

See http://lttng.org/lttng2.0 for more details.

Changes since v1:

 * Remove 'bleh.patch', leftover from previous tests/debugging.
 * Fix indentation in Config.in files
 * Make sure each file ends with a newline

Regards,

Thomas

The following changes since commit ef3fe1bef6581c66af3858d540343e011cb9fdd6:

  cdrkit: bump to version 1.1.11 and adjust style (2011-12-21 23:02:31 +0100)

are available in the git repository at:
  http://free-electrons.com/~thomas/buildroot.git for-2012.02/lttng

Thomas Petazzoni (7):
      liburcu: new package
      lttng-modules: new package
      lttng-tools: new package
      popt: add host variant for host-lttng-babeltrace
      util-linux: add host variant for host-lttng-babeltrace
      lttng-babeltrace: new package
      lttng-libust: new package

 package/Config.in                                  |    5 ++++
 package/liburcu/Config.in                          |    9 +++++++
 package/liburcu/liburcu.mk                         |    8 ++++++
 package/lttng-babeltrace/Config.in                 |   22 ++++++++++++++++
 package/lttng-babeltrace/lttng-babeltrace.mk       |   17 +++++++++++++
 package/lttng-libust/Config.in                     |   10 +++++++
 .../lttng-libust-fix-overflow-32-bits.patch        |   26 ++++++++++++++++++++
 package/lttng-libust/lttng-libust.mk               |    8 ++++++
 package/lttng-modules/Config.in                    |   18 +++++++++++++
 package/lttng-modules/lttng-modules.mk             |   16 ++++++++++++
 package/lttng-tools/Config.in                      |   19 ++++++++++++++
 package/lttng-tools/lttng-tools.mk                 |   12 +++++++++
 package/popt/popt.mk                               |    1 +
 package/util-linux/util-linux.mk                   |    9 +++++++
 14 files changed, 180 insertions(+), 0 deletions(-)
 create mode 100644 package/liburcu/Config.in
 create mode 100644 package/liburcu/liburcu.mk
 create mode 100644 package/lttng-babeltrace/Config.in
 create mode 100644 package/lttng-babeltrace/lttng-babeltrace.mk
 create mode 100644 package/lttng-libust/Config.in
 create mode 100644 package/lttng-libust/lttng-libust-fix-overflow-32-bits.patch
 create mode 100644 package/lttng-libust/lttng-libust.mk
 create mode 100644 package/lttng-modules/Config.in
 create mode 100644 package/lttng-modules/lttng-modules.mk
 create mode 100644 package/lttng-tools/Config.in
 create mode 100644 package/lttng-tools/lttng-tools.mk

Thanks,
-- 
Thomas Petazzoni

[Buildroot] [PATCH 1/7] liburcu: new package

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/Config.in          |    1 +
 package/liburcu/Config.in  |    9 +++++++++
 package/liburcu/liburcu.mk |    8 ++++++++
 3 files changed, 18 insertions(+), 0 deletions(-)
 create mode 100644 package/liburcu/Config.in
 create mode 100644 package/liburcu/liburcu.mk

diff --git a/package/Config.in b/package/Config.in
index b6df18a..e30eac5 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -365,6 +365,7 @@ source "package/libffi/Config.in"
 source "package/libglib2/Config.in"
 source "package/libnspr/Config.in"
 source "package/libsigc/Config.in"
+source "package/liburcu/Config.in"
 source "package/orc/Config.in"
 source "package/poco/Config.in"
 source "package/startup-notification/Config.in"
diff --git a/package/liburcu/Config.in b/package/liburcu/Config.in
new file mode 100644
index 0000000..5a6e4b2
--- /dev/null
+++ b/package/liburcu/Config.in
@@ -0,0 +1,9 @@
+config BR2_PACKAGE_LIBURCU
+	bool "liburcu"
+	help
+	  Userspace implementation of the Read-Copy-Update (RCU)
+	  synchronization mechanism. This library is mainly used by
+	  the LTTng tracing infrastructure, but can be used for other
+	  purposes as well.
+
+	  http://lttng.org/urcu
diff --git a/package/liburcu/liburcu.mk b/package/liburcu/liburcu.mk
new file mode 100644
index 0000000..5cb6419
--- /dev/null
+++ b/package/liburcu/liburcu.mk
@@ -0,0 +1,8 @@
+LIBURCU_VERSION = 0.6.7
+LIBURCU_SITE    = http://lttng.org/files/bundles/20111214/
+LIBURCU_SOURCE  = userspace-rcu-$(LIBURCU_VERSION).tar.bz2
+
+LIBURCU_INSTALL_STAGING = YES
+
+$(eval $(call AUTOTARGETS))
+
-- 
1.7.4.1

[Buildroot] [PATCH 2/7] lttng-modules: new package

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/Config.in                      |    1 +
 package/lttng-modules/Config.in        |   18 ++++++++++++++++++
 package/lttng-modules/lttng-modules.mk |   16 ++++++++++++++++
 3 files changed, 35 insertions(+), 0 deletions(-)
 create mode 100644 package/lttng-modules/Config.in
 create mode 100644 package/lttng-modules/lttng-modules.mk

diff --git a/package/Config.in b/package/Config.in
index e30eac5..f0cc4f2 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -24,6 +24,7 @@ source "package/kexec/Config.in"
 source "package/lmbench/Config.in"
 source "package/lsof/Config.in"
 source "package/ltp-testsuite/Config.in"
+source "package/lttng-modules/Config.in"
 source "package/ltrace/Config.in"
 source "package/memstat/Config.in"
 source "package/netperf/Config.in"
diff --git a/package/lttng-modules/Config.in b/package/lttng-modules/Config.in
new file mode 100644
index 0000000..2a0f938
--- /dev/null
+++ b/package/lttng-modules/Config.in
@@ -0,0 +1,18 @@
+config BR2_PACKAGE_LTTNG_MODULES
+	bool "lttng-modules"
+	depends on BR2_LINUX_KERNEL
+	help
+	  Kernel modules for the LTTng 2.0 kernel tracing
+	  infrastructure.
+
+	  Your kernel must have CONFIG_TRACEPOINTS enabled for this
+	  package to build something useful. You may also want to have
+	  CONFIG_PERF_EVENTS to access perf event counters from
+	  ltt-ng. Note that system call tracing is only available on
+	  architectures that support CONFIG_HAVE_SYSCALL_TRACEPOINTS.
+
+	  The packaged version is compatible with kernel 2.6.38,
+	  2.6.39, 3.0 and 3.1.0. See
+	  http://lttng.org/files/bundles/20111214/README.compatible.kernels.txt
+
+	  http://lttng.org
diff --git a/package/lttng-modules/lttng-modules.mk b/package/lttng-modules/lttng-modules.mk
new file mode 100644
index 0000000..450a40c
--- /dev/null
+++ b/package/lttng-modules/lttng-modules.mk
@@ -0,0 +1,16 @@
+LTTNG_MODULES_VERSION = 2.0-pre11
+LTTNG_MODULES_SITE    = http://lttng.org/files/bundles/20111214/
+LTTNG_MODULES_SOURCE  = lttng-modules-$(LTTNG_MODULES_VERSION).tar.bz2
+
+LTTNG_MODULES_DEPENDENCIES = linux
+
+define LTTNG_MODULES_BUILD_CMDS
+	$(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNELDIR=$(LINUX_DIR)
+endef
+
+define LTTNG_MODULES_INSTALL_TARGET_CMDS
+	$(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNELDIR=$(LINUX_DIR) modules_install
+endef
+
+$(eval $(call GENTARGETS))
+
-- 
1.7.4.1

[Buildroot] [PATCH 3/7] lttng-tools: new package

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/Config.in                  |    1 +
 package/lttng-tools/Config.in      |   19 +++++++++++++++++++
 package/lttng-tools/lttng-tools.mk |   12 ++++++++++++
 3 files changed, 32 insertions(+), 0 deletions(-)
 create mode 100644 package/lttng-tools/Config.in
 create mode 100644 package/lttng-tools/lttng-tools.mk

diff --git a/package/Config.in b/package/Config.in
index f0cc4f2..df49778 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -25,6 +25,7 @@ source "package/lmbench/Config.in"
 source "package/lsof/Config.in"
 source "package/ltp-testsuite/Config.in"
 source "package/lttng-modules/Config.in"
+source "package/lttng-tools/Config.in"
 source "package/ltrace/Config.in"
 source "package/memstat/Config.in"
 source "package/netperf/Config.in"
diff --git a/package/lttng-tools/Config.in b/package/lttng-tools/Config.in
new file mode 100644
index 0000000..5bd7349
--- /dev/null
+++ b/package/lttng-tools/Config.in
@@ -0,0 +1,19 @@
+config BR2_PACKAGE_LTTNG_TOOLS
+	bool "lttng-tools"
+	depends on BR2_PACKAGE_LTTNG_MODULES
+	select BR2_PACKAGE_LIBURCU
+	select BR2_PACKAGE_POPT
+	help
+	  Userspace utilities for the LTTng 2.0 tracing
+	  infrastructure.
+
+	  Those utilities are required on the target system to start
+	  and stop tracing sessions. Analysis of the trace can be done
+	  on the host machine using the babeltrace utility. This
+	  utility is automatically built by Buildroot in
+	  $(O)/host/usr/bin/babeltrace, as a dependency of
+	  lttng-tools. However, there is also a lttng-babeltrace
+	  package for the target, if babeltrace on the target is
+	  interesting.
+
+	  http://lttng.org
diff --git a/package/lttng-tools/lttng-tools.mk b/package/lttng-tools/lttng-tools.mk
new file mode 100644
index 0000000..474f3c1
--- /dev/null
+++ b/package/lttng-tools/lttng-tools.mk
@@ -0,0 +1,12 @@
+LTTNG_TOOLS_VERSION = 2.0-pre15
+LTTNG_TOOLS_SITE    = http://lttng.org/files/bundles/20111214/
+LTTNG_TOOLS_SOURCE  = lttng-tools-$(LTTNG_TOOLS_VERSION).tar.bz2
+
+# The host-lttng-babeltrace technically isn't a required build
+# dependency. However, having the babeltrace utilities built for the
+# host is very useful, since those tools allow to convert the binary
+# trace format into an human readable format.
+LTTNG_TOOLS_DEPENDENCIES = liburcu popt host-lttng-babeltrace
+
+$(eval $(call AUTOTARGETS))
+
-- 
1.7.4.1

[Buildroot] [PATCH 4/7] popt: add host variant for host-lttng-babeltrace

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/popt/popt.mk |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/package/popt/popt.mk b/package/popt/popt.mk
index 98f438d..fd25caa 100644
--- a/package/popt/popt.mk
+++ b/package/popt/popt.mk
@@ -16,3 +16,4 @@ POPT_CONF_OPT += --with-libiconv-prefix=$(STAGING_DIR)/usr
 endif
 
 $(eval $(call AUTOTARGETS))
+$(eval $(call AUTOTARGETS,host))
-- 
1.7.4.1

[Buildroot] [PATCH 5/7] util-linux: add host variant for host-lttng-babeltrace

[Thomas Petazzoni]

lttng-babeltrace needs libuuid, which is provided by util-linux, and
since we want to build lttng-babeltrace for the host, we need to build
libuuid for the host. It's a shame that libuuid is part of such a big
package as util-linux.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/util-linux/util-linux.mk |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/package/util-linux/util-linux.mk b/package/util-linux/util-linux.mk
index a3d6e13..6bffc2c 100644
--- a/package/util-linux/util-linux.mk
+++ b/package/util-linux/util-linux.mk
@@ -67,7 +67,16 @@ UTIL_LINUX_CONF_OPT += \
 	$(if $(BR2_PACKAGE_UTIL_LINUX_LOGIN_UTILS),--enable-login-utils) \
 	$(if $(BR2_PACKAGE_UTIL_LINUX_WRITE),--enable-write)
 
+HOST_UTIL_LINUX_CONF_OPT += \
+	--enable-libuuid \
+	--disable-mount --disable-fsck --disable-libmount \
+	--disable-uuidd --disable-libblkid --disable-agetty \
+	--disable-cramfs --disable-switch_root --disable-pivot_root \
+	--disable-fallocate --disable-unshare --disable-rename \
+	--disable-schedutils --disable-wall --disable-partx
+
 $(eval $(call AUTOTARGETS))
+$(eval $(call AUTOTARGETS,host))
 
 # MKINSTALLDIRS comes from tweaked m4/nls.m4, but autoreconf uses staging
 # one, so it disappears
-- 
1.7.4.1

[Buildroot] [PATCH 6/7] lttng-babeltrace: new package

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/Config.in                            |    1 +
 package/lttng-babeltrace/Config.in           |   22 ++++++++++++++++++++++
 package/lttng-babeltrace/lttng-babeltrace.mk |   17 +++++++++++++++++
 3 files changed, 40 insertions(+), 0 deletions(-)
 create mode 100644 package/lttng-babeltrace/Config.in
 create mode 100644 package/lttng-babeltrace/lttng-babeltrace.mk

diff --git a/package/Config.in b/package/Config.in
index df49778..30e0567 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -24,6 +24,7 @@ source "package/kexec/Config.in"
 source "package/lmbench/Config.in"
 source "package/lsof/Config.in"
 source "package/ltp-testsuite/Config.in"
+source "package/lttng-babeltrace/Config.in"
 source "package/lttng-modules/Config.in"
 source "package/lttng-tools/Config.in"
 source "package/ltrace/Config.in"
diff --git a/package/lttng-babeltrace/Config.in b/package/lttng-babeltrace/Config.in
new file mode 100644
index 0000000..e6f3845
--- /dev/null
+++ b/package/lttng-babeltrace/Config.in
@@ -0,0 +1,22 @@
+config BR2_PACKAGE_LTTNG_BABELTRACE
+	bool "lttng-babeltrace"
+	depends on BR2_PACKAGE_LTTNG_TOOLS
+	select BR2_PACKAGE_UTIL_LINUX
+	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
+	select BR2_PACKAGE_LIBGLIB2
+	help
+	  Babeltrace is part of the LTTng 2.x project.
+
+	  This project provides trace read and write libraries, as
+	  well as a trace converter. A plugin can be created for any
+	  trace format to allow its conversion to/from another trace
+	  format.
+
+	  Having this tool on the target is not mandatory. You can
+	  transfer the binary trace output from the target to your
+	  development workstation, and use babeltrace here. Buildroot
+	  automatically builds a host babeltrace in
+	  $(O)/host/usr/bin/babeltrace as a dependency of the
+	  lttng-tools package.
+
+	  http://lttng.org
diff --git a/package/lttng-babeltrace/lttng-babeltrace.mk b/package/lttng-babeltrace/lttng-babeltrace.mk
new file mode 100644
index 0000000..5977dda
--- /dev/null
+++ b/package/lttng-babeltrace/lttng-babeltrace.mk
@@ -0,0 +1,17 @@
+LTTNG_BABELTRACE_SITE    = http://lttng.org/files/bundles/20111214/
+LTTNG_BABELTRACE_VERSION = 0.8
+LTTNG_BABELTRACE_SOURCE  = babeltrace-$(LTTNG_BABELTRACE_VERSION).tar.bz2
+
+# Needed to fix libtool handling, otherwise the build fails when
+# building the ctf-parser-test program, which depends on libctf-ast.so
+# which itself depends on libbabeltrace_types.so.0 (and libtool gets
+# lost in the middle of this).
+LTTNG_BABELTRACE_AUTORECONF      = YES
+HOST_LTTNG_BABELTRACE_AUTORECONF = YES
+
+LTTNG_BABELTRACE_DEPENDENCIES = popt util-linux libglib2
+
+HOST_LTTNG_BABELTRACE_DEPENDENCIES = host-popt host-libglib2 host-util-linux
+
+$(eval $(call AUTOTARGETS))
+$(eval $(call AUTOTARGETS,host))
-- 
1.7.4.1

[Buildroot] [PATCH 7/7] lttng-libust: new package

[Thomas Petazzoni]

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/Config.in                                  |    1 +
 package/lttng-libust/Config.in                     |   10 +++++++
 .../lttng-libust-fix-overflow-32-bits.patch        |   26 ++++++++++++++++++++
 package/lttng-libust/lttng-libust.mk               |    8 ++++++
 4 files changed, 45 insertions(+), 0 deletions(-)
 create mode 100644 package/lttng-libust/Config.in
 create mode 100644 package/lttng-libust/lttng-libust-fix-overflow-32-bits.patch
 create mode 100644 package/lttng-libust/lttng-libust.mk

diff --git a/package/Config.in b/package/Config.in
index 30e0567..77b277d 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -369,6 +369,7 @@ source "package/libglib2/Config.in"
 source "package/libnspr/Config.in"
 source "package/libsigc/Config.in"
 source "package/liburcu/Config.in"
+source "package/lttng-libust/Config.in"
 source "package/orc/Config.in"
 source "package/poco/Config.in"
 source "package/startup-notification/Config.in"
diff --git a/package/lttng-libust/Config.in b/package/lttng-libust/Config.in
new file mode 100644
index 0000000..335a956
--- /dev/null
+++ b/package/lttng-libust/Config.in
@@ -0,0 +1,10 @@
+config BR2_PACKAGE_LTTNG_LIBUST
+	bool "lttng-libust"
+	select BR2_PACKAGE_LIBURCU
+	help
+	  Userspace tracing library for the Lttng tracing
+	  infrastructure. It allows userspace programs to create
+	  custom trace events that are integrated with all other
+	  events gathered by LTTng.
+
+	  http://lttng.org
diff --git a/package/lttng-libust/lttng-libust-fix-overflow-32-bits.patch b/package/lttng-libust/lttng-libust-fix-overflow-32-bits.patch
new file mode 100644
index 0000000..c2a4dd2
--- /dev/null
+++ b/package/lttng-libust/lttng-libust-fix-overflow-32-bits.patch
@@ -0,0 +1,26 @@
+From dc190cc1f8ddccfa7b0b8323ed157afb29a0ebb7 Mon Sep 17 00:00:00 2001
+From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+Date: Wed, 21 Dec 2011 16:24:48 -0500
+Subject: [PATCH] Fix clock source overflow on 32-bit archs
+
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+---
+ liblttng-ust/clock.h |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/liblttng-ust/clock.h b/liblttng-ust/clock.h
+index b5d3e77..23294d2 100644
+--- a/liblttng-ust/clock.h
++++ b/liblttng-ust/clock.h
+@@ -39,7 +39,7 @@ static __inline__ uint64_t trace_clock_read64(void)
+ 	struct timespec ts;
+ 
+ 	clock_gettime(CLOCK_MONOTONIC, &ts);
+-	return (ts.tv_sec * 1000000000) + ts.tv_nsec;
++	return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec;
+ }
+ 
+ static __inline__ uint32_t trace_clock_freq_scale(void)
+-- 
+1.7.2.5
+
diff --git a/package/lttng-libust/lttng-libust.mk b/package/lttng-libust/lttng-libust.mk
new file mode 100644
index 0000000..a2cef2a
--- /dev/null
+++ b/package/lttng-libust/lttng-libust.mk
@@ -0,0 +1,8 @@
+LTTNG_LIBUST_SITE    = http://lttng.org/files/bundles/20111214/
+LTTNG_LIBUST_VERSION = 1.9.2
+LTTNG_LIBUST_SOURCE  = lttng-ust-$(LTTNG_LIBUST_VERSION).tar.gz
+
+LTTNG_LIBUST_INSTALL_STAGING = YES
+LTTNG_LIBUST_DEPENDENCIES    = liburcu
+
+$(eval $(call AUTOTARGETS))
-- 
1.7.4.1

[Buildroot] [PATCH 2/7] lttng-modules: new package

[Thomas De Schampheleire]

Hi Thomas,

On Thu, Dec 22, 2011 at 10:57 AM, Thomas Petazzoni
<thomas.petazzoni@free-electrons.com> wrote:
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> ---
> ?package/Config.in ? ? ? ? ? ? ? ? ? ? ?| ? ?1 +
> ?package/lttng-modules/Config.in ? ? ? ?| ? 18 ++++++++++++++++++
> ?package/lttng-modules/lttng-modules.mk | ? 16 ++++++++++++++++
> ?3 files changed, 35 insertions(+), 0 deletions(-)
> ?create mode 100644 package/lttng-modules/Config.in
> ?create mode 100644 package/lttng-modules/lttng-modules.mk
>
> diff --git a/package/Config.in b/package/Config.in
> index e30eac5..f0cc4f2 100644
> --- a/package/Config.in
> +++ b/package/Config.in
> @@ -24,6 +24,7 @@ source "package/kexec/Config.in"
> ?source "package/lmbench/Config.in"
> ?source "package/lsof/Config.in"
> ?source "package/ltp-testsuite/Config.in"
> +source "package/lttng-modules/Config.in"
> ?source "package/ltrace/Config.in"
> ?source "package/memstat/Config.in"
> ?source "package/netperf/Config.in"
> diff --git a/package/lttng-modules/Config.in b/package/lttng-modules/Config.in
> new file mode 100644
> index 0000000..2a0f938
> --- /dev/null
> +++ b/package/lttng-modules/Config.in
> @@ -0,0 +1,18 @@
> +config BR2_PACKAGE_LTTNG_MODULES
> + ? ? ? bool "lttng-modules"
> + ? ? ? depends on BR2_LINUX_KERNEL
> + ? ? ? help
> + ? ? ? ? Kernel modules for the LTTng 2.0 kernel tracing
> + ? ? ? ? infrastructure.
> +
> + ? ? ? ? Your kernel must have CONFIG_TRACEPOINTS enabled for this
> + ? ? ? ? package to build something useful. You may also want to have
> + ? ? ? ? CONFIG_PERF_EVENTS to access perf event counters from
> + ? ? ? ? ltt-ng. Note that system call tracing is only available on
> + ? ? ? ? architectures that support CONFIG_HAVE_SYSCALL_TRACEPOINTS.
> +
> + ? ? ? ? The packaged version is compatible with kernel 2.6.38,
> + ? ? ? ? 2.6.39, 3.0 and 3.1.0. See
> + ? ? ? ? http://lttng.org/files/bundles/20111214/README.compatible.kernels.txt
> +
> + ? ? ? ? http://lttng.org
> diff --git a/package/lttng-modules/lttng-modules.mk b/package/lttng-modules/lttng-modules.mk
> new file mode 100644
> index 0000000..450a40c
> --- /dev/null
> +++ b/package/lttng-modules/lttng-modules.mk
> @@ -0,0 +1,16 @@
> +LTTNG_MODULES_VERSION = 2.0-pre11
> +LTTNG_MODULES_SITE ? ?= http://lttng.org/files/bundles/20111214/
> +LTTNG_MODULES_SOURCE ?= lttng-modules-$(LTTNG_MODULES_VERSION).tar.bz2
> +
> +LTTNG_MODULES_DEPENDENCIES = linux
> +
> +define LTTNG_MODULES_BUILD_CMDS
> + ? ? ? $(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNELDIR=$(LINUX_DIR)
> +endef
> +
> +define LTTNG_MODULES_INSTALL_TARGET_CMDS
> + ? ? ? $(MAKE) -C $(@D) $(LINUX_MAKE_FLAGS) KERNELDIR=$(LINUX_DIR) modules_install

On an old system, I have noticed a problem with this approach. With
the above line, the 'depmod' utility of the host will be used instead
of the depmod that was built with the linux kernel in $(LINUX_DIR). If
the host depmod is very old, a segmentation fault occurs.

To fix this, one should add DEPMOD="$(HOST_DIR)/usr/sbin/depmod" to
the command, just as linux/linux.mk does it.

In fact, since building kernel modules from buildroot is not uncommon
anymore (there are some packages in the tree that do it, plus
user-specific packages, wouldn't it be a good idea to provide a small
infrastructure for building kernel modules? This would prevent such
mistakes. Instead of gentargets, we could have something like
kernelmodule.
What do you think about that?

Best regards,
Thomas

> +endef
> +
> +$(eval $(call GENTARGETS))
> +
> --
> 1.7.4.1
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

[Buildroot] [PATCH 2/7] lttng-modules: new package

[Thomas Petazzoni]

Le Thu, 22 Dec 2011 14:03:14 +0100,
Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com> a ?crit :

> On an old system, I have noticed a problem with this approach. With
> the above line, the 'depmod' utility of the host will be used instead
> of the depmod that was built with the linux kernel in $(LINUX_DIR). If
> the host depmod is very old, a segmentation fault occurs.
> 
> To fix this, one should add DEPMOD="$(HOST_DIR)/usr/sbin/depmod" to
> the command, just as linux/linux.mk does it.  

Ah, ok. Then maybe this DEPMOD=... variable should be part of
LINUX_MAKE_FLAGS.

> In fact, since building kernel modules from buildroot is not uncommon
> anymore (there are some packages in the tree that do it, plus
> user-specific packages, wouldn't it be a good idea to provide a small
> infrastructure for building kernel modules? This would prevent such
> mistakes. Instead of gentargets, we could have something like
> kernelmodule.
> What do you think about that?  

I don't know. I am not exactly sure because there is no real standard
way for packaging external kernel modules. If you look at linux-fusion,
RTAI or lttng-modules, you'll see that the build mechanism is very
different. I'm not sure there is a real pattern here that we can
factorize nicely in an infrastructure. Which pattern do you see?

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] [PATCH 2/7] lttng-modules: new package

[Arnout Vandecappelle]

On Thursday 22 December 2011 14:16:05 Thomas Petazzoni wrote:
> > In fact, since building kernel modules from buildroot is not uncommon
> > anymore (there are some packages in the tree that do it, plus
> > user-specific packages, wouldn't it be a good idea to provide a small
> > infrastructure for building kernel modules? This would prevent such
> > mistakes. Instead of gentargets, we could have something like
> > kernelmodule.
> > What do you think about that?  
> 
> I don't know. I am not exactly sure because there is no real standard
> way for packaging external kernel modules. If you look at linux-fusion,
> RTAI or lttng-modules, you'll see that the build mechanism is very
> different. I'm not sure there is a real pattern here that we can
> factorize nicely in an infrastructure. Which pattern do you see?

 RTAI is different because it is much more than a kernel module.  But I
do see a pattern for linux-fusion, lttng-modules and others I've been
using locally.  They generally have a Makefile that tries to be smart
about the kernel sources, and eventually calls a sub-make as

 $(MAKE) -C $(KERNELDIR) M=$(PWD) <extracflags> <target>

 I think we can do the latter directly from buildroot.

 In some cases there is a user-space component in the same package, but
that normally can be built separately as well.


 Regards,
 Arnout

-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F

[Buildroot] [PATCH 5/7] util-linux: add host variant for host-lttng-babeltrace

[Arnout Vandecappelle]

On Thursday 22 December 2011 10:57:21 Thomas Petazzoni wrote:
> lttng-babeltrace needs libuuid, which is provided by util-linux, and
> since we want to build lttng-babeltrace for the host, we need to build
> libuuid for the host. It's a shame that libuuid is part of such a big
> package as util-linux.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> ---
>  package/util-linux/util-linux.mk |    9 +++++++++
>  1 files changed, 9 insertions(+), 0 deletions(-)
> 
> diff --git a/package/util-linux/util-linux.mk b/package/util-linux/util-linux.mk
> index a3d6e13..6bffc2c 100644
> --- a/package/util-linux/util-linux.mk
> +++ b/package/util-linux/util-linux.mk
> @@ -67,7 +67,16 @@ UTIL_LINUX_CONF_OPT += \
>  	$(if $(BR2_PACKAGE_UTIL_LINUX_LOGIN_UTILS),--enable-login-utils) \
>  	$(if $(BR2_PACKAGE_UTIL_LINUX_WRITE),--enable-write)
>  
> +HOST_UTIL_LINUX_CONF_OPT += \
> +	--enable-libuuid \
> +	--disable-mount --disable-fsck --disable-libmount \
> +	--disable-uuidd --disable-libblkid --disable-agetty \
> +	--disable-cramfs --disable-switch_root --disable-pivot_root \
> +	--disable-fallocate --disable-unshare --disable-rename \
> +	--disable-schedutils --disable-wall --disable-partx
> +

 I would put (part of) the comment of the commit message right here in the
mk file.  Else, two years down the road someone will look at this and wonder
what the hell is going on...

 Regards,
 Arnout


>  $(eval $(call AUTOTARGETS))
> +$(eval $(call AUTOTARGETS,host))
>  
>  # MKINSTALLDIRS comes from tweaked m4/nls.m4, but autoreconf uses staging
>  # one, so it disappears
> 

-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F

[Buildroot] [PATCH 5/7] util-linux: add host variant for host-lttng-babeltrace

[Thomas Petazzoni]

Le Thu, 12 Jan 2012 23:12:13 +0100,
Arnout Vandecappelle <arnout@mind.be> a ?crit :

>  I would put (part of) the comment of the commit message right here
> in the mk file.  Else, two years down the road someone will look at
> this and wonder what the hell is going on...

Good idea, will do.

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

[Buildroot] [PATCH 5/7] util-linux: add host variant for host-lttng-babeltrace

[Thomas Petazzoni]

lttng-babeltrace needs libuuid, which is provided by util-linux, and
since we want to build lttng-babeltrace for the host, we need to build
libuuid for the host. It's a shame that libuuid is part of such a big
package as util-linux.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 package/util-linux/util-linux.mk |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/package/util-linux/util-linux.mk b/package/util-linux/util-linux.mk
index a3d6e13..6bffc2c 100644
--- a/package/util-linux/util-linux.mk
+++ b/package/util-linux/util-linux.mk
@@ -67,7 +67,16 @@ UTIL_LINUX_CONF_OPT += \
 	$(if $(BR2_PACKAGE_UTIL_LINUX_LOGIN_UTILS),--enable-login-utils) \
 	$(if $(BR2_PACKAGE_UTIL_LINUX_WRITE),--enable-write)
 
+HOST_UTIL_LINUX_CONF_OPT += \
+	--enable-libuuid \
+	--disable-mount --disable-fsck --disable-libmount \
+	--disable-uuidd --disable-libblkid --disable-agetty \
+	--disable-cramfs --disable-switch_root --disable-pivot_root \
+	--disable-fallocate --disable-unshare --disable-rename \
+	--disable-schedutils --disable-wall --disable-partx
+
 $(eval $(call AUTOTARGETS))
+$(eval $(call AUTOTARGETS,host))
 
 # MKINSTALLDIRS comes from tweaked m4/nls.m4, but autoreconf uses staging
 # one, so it disappears
-- 
1.7.4.1