From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Keeping Date: Mon, 2 Apr 2018 15:02:49 +0100 Subject: [Buildroot] [PATCH v2] linux-tool-perf: permit TUI build In-Reply-To: <20180402130716.GM3625@scaer> References: <20180402125145.13431-1-john@metanate.com> <20180402130716.GM3625@scaer> Message-ID: <20180402150249.7f4e70f1.john@metanate.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Since Linux 3.10, perf's NO_NEWT configuration option simply sets NO_SLANG=1 and there is no dependency on libnewt. We already handle NO_SLANG correctly based on whether or not BR2_PACKAGE_SLANG is selected, so all we accomplish by setting NO_NEWT=1 is disabling perf's TUI when all of the dependencies are available. To simplify all of this, introduce a new config option to enable the perf TUI which depends on slang and add a check to prevent building the TUI on versions which are too old. The check for NO_SLANG is equivalent to checking if NO_NEWT is required as NO_SLANG was added in the same commit that removed the libnewt dependency and deprecated NO_NEWT (6692c262df4f, "perf tools: Remove dependency on libnewt", 2013-03-28). Signed-off-by: John Keeping --- On Mon, 2 Apr 2018 15:07:16 +0200, Yann E. MORIN wrote: > On 2018-04-02 13:51 +0100, John Keeping spake thusly: > > Since Linux 3.10, perf's NO_NEWT configuration option simply sets > > NO_SLANG=1 and there is no dependency on libnewt. > > > > We already handle NO_SLANG correctly based on whether or not > > BR2_PACKAGE_SLANG is selected, so all we accomplish by setting NO_NEWT=1 > > is disabling perf's TUI when all of the dependencies are available. > > > > Linux 3.10 is almost 5 years old now, so there doesn't seem to be any > > point in jumping through additional hoops to make perf from older kernel > > versions build when the newt package is not available. > > But we still support kernels back to 3.0... > > I would instead suggest you add an option in > package/linux-tools/Config.in: > > config BR2_PACKAGE_LINUX_TOOLS_PERF_TUI > > And do a check in package/linux-tools/linux-tool-perf.mk.in whether it > is valid o not, if needed. Something like this? I can't see a neater way of checking the version dependency and this matches the existing handling of the elfutils dependency. package/linux-tools/Config.in | 12 ++++++++++++ package/linux-tools/linux-tool-perf.mk.in | 12 +++++++++--- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/package/linux-tools/Config.in b/package/linux-tools/Config.in index e3ccd850f9..1d31ce84f1 100644 --- a/package/linux-tools/Config.in +++ b/package/linux-tools/Config.in @@ -54,6 +54,18 @@ config BR2_PACKAGE_LINUX_TOOLS_PERF https://perf.wiki.kernel.org/ +if BR2_PACKAGE_LINUX_TOOLS_PERF + +config BR2_PACKAGE_LINUX_TOOLS_PERF_TUI + bool "enable perf TUI" + select BR2_PACKAGE_SLANG + help + Enable the TUI interface for perf which requires a TTY and + enables zooming into DSOs and threads as well as other + features. + +endif + config BR2_PACKAGE_LINUX_TOOLS_SELFTESTS bool"selftests" depends on BR2_PACKAGE_BUSYBOX_SHOW_OTHERS # bash diff --git a/package/linux-tools/linux-tool-perf.mk.in b/package/linux-tools/linux-tool-perf.mk.in index 69492ba8da..80e00c3c56 100644 --- a/package/linux-tools/linux-tool-perf.mk.in +++ b/package/linux-tools/linux-tool-perf.mk.in @@ -22,7 +22,6 @@ PERF_MAKE_FLAGS = \ prefix=/usr \ WERROR=0 \ NO_LIBAUDIT=1 \ - NO_NEWT=1 \ NO_GTK2=1 \ NO_LIBPERL=1 \ NO_LIBPYTHON=1 \ @@ -59,10 +58,10 @@ ifeq ($(BR2_arc),y) PERF_MAKE_FLAGS += NO_BACKTRACE=1 endif -ifeq ($(BR2_PACKAGE_SLANG),y) +ifeq ($(BR2_PACKAGE_LINUX_TOOLS_PERF_TUI),y) PERF_DEPENDENCIES += slang else -PERF_MAKE_FLAGS += NO_SLANG=1 +PERF_MAKE_FLAGS += NO_NEWT=1 NO_SLANG=1 endif ifeq ($(BR2_PACKAGE_LIBUNWIND),y) @@ -128,6 +127,13 @@ define PERF_BUILD_CMDS fi \ fi \ fi + $(Q)if test "$(BR2_PACKAGE_LINUX_TOOLS_PERF_TUI)" = "y" ; then \ + if ! grep -q NO_SLANG $(LINUX_DIR)/tools/perf/Makefile* ; then \ + echo "The perf tool in your kernel cannot be build with the TUI." ; \ + echo "Either upgrade your kernel to >= 3.10, or disable the TUI." ; \ + exit 1 ; \ + fi \ + fi $(TARGET_MAKE_ENV) $(MAKE1) $(PERF_MAKE_FLAGS) \ -C $(LINUX_DIR)/tools/perf O=$(LINUX_DIR)/tools/perf/ endef -- 2.16.3