linux-kernel - [tip:perf/core] perf build: Add build documentation

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Message-ID: <tip-ibgf7vxyduwohlqqfayl11xb@git.kernel.org>
Date:	Wed, 18 Feb 2015 10:39:44 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, acme@...hat.com, linux-kernel@...r.kernel.org,
	cjashfor@...ux.vnet.ibm.com, will.deacon@....com, hpa@...or.com,
	sukadev@...ux.vnet.ibm.com, eranian@...gle.com, paulus@...ba.org,
	mingo@...nel.org, dsahern@...il.com, jolsa@...nel.org,
	fweisbec@...il.com, peterz@...radead.org, namhyung@...nel.org,
	alexis.berlemont@...il.com, bp@...en8.de
Subject: [tip:perf/core] perf build: Add build documentation

Commit-ID:  f819f703a42eed63443cef796b1852e6baf985bd
Gitweb:     http://git.kernel.org/tip/f819f703a42eed63443cef796b1852e6baf985bd
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Wed, 14 Jan 2015 19:05:27 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 12 Feb 2015 17:53:00 -0300

perf build: Add build documentation

Adding file describing the basics of perf build process.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Tested-by: Will Deacon <will.deacon@....com>
Cc: Alexis Berlemont <alexis.berlemont@...il.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-ibgf7vxyduwohlqqfayl11xb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/Documentation/Build.txt | 49 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/tools/perf/Documentation/Build.txt b/tools/perf/Documentation/Build.txt
new file mode 100644
index 0000000..f6fc650
--- /dev/null
+++ b/tools/perf/Documentation/Build.txt
@@ -0,0 +1,49 @@
+
+1) perf build
+=============
+The perf build process consists of several separated building blocks,
+which are linked together to form the perf binary:
+  - libperf library (static)
+  - perf builtin commands
+  - traceevent library (static)
+  - GTK ui library
+
+Several makefiles govern the perf build:
+
+  - Makefile
+    top level Makefile working as a wrapper that calls the main
+    Makefile.perf with a -j option to do parallel builds.
+
+  - Makefile.perf
+    main makefile that triggers build of all perf objects including
+    installation and documentation processing.
+
+  - tools/build/Makefile.build
+    main makefile of the build framework
+
+  - tools/build/Build.include
+    build framework generic definitions
+
+  - Build makefiles
+    makefiles that defines build objects
+
+Please refer to tools/build/Documentation/Build.txt for more
+information about build framework.
+
+
+2) perf build
+=============
+The Makefile.perf triggers the build framework for build objects:
+   perf, libperf, gtk
+
+resulting in following objects:
+  $ ls  *-in.o
+  gtk-in.o  libperf-in.o  perf-in.o
+
+Those objects are then used in final linking:
+  libperf-gtk.so <- gtk-in.o  libperf-in.o
+  perf           <- perf-in.o libperf-in.o
+
+
+NOTE this description is omitting other libraries involved, only
+     focusing on build framework outcomes
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