[PATCH 04/29] tools lib traceevent: Add plugin build support

Jiri Olsa
2013-11-28T11:34:07Z

Backporting missing pieces of plugin building infrastructure:
- adding Makefile 'plugins' target to build all
defined plugins
- adding Makefile 'install_plugins' target as 'install_lib'
target dependency
- link plugin objects with shared object building

Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb):
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

Plugins are by default installed into following locations:
'$(HOME)/.traceevent/plugins'
- if we are installing under $(HOME)
'$(prefix)/lib/traceevent/plugins'
- otherwise

This path is propagated to the plugin object as
a plugins search path.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: David Ahern <dsahern@gmail.com>
---
tools/lib/traceevent/Makefile | 52 ++++++++++++++++++++++++++++++++++++++-----
1 file changed, 47 insertions(+), 5 deletions(-)

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 2ccb5bc..1526798 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -43,6 +43,30 @@ man_dir_SQ = '$(subst ','\'',$(man_dir))'
export man_dir man_dir_SQ INSTALL
export DESTDIR DESTDIR_SQ

+set_plugin_dir := 1
+
+# Set plugin_dir to preffered global plugin location
+# If we install under $HOME directory we go under
+# $(HOME)/.traceevent/plugins
+#
+# We dont set PLUGIN_DIR in case we install under $HOME
+# directory, because by default the code looks under:
+# $(HOME)/.traceevent/plugins by default.
+#
+ifeq ($(plugin_dir),)
+ifeq ($(prefix),$(HOME))
+override plugin_dir = $(HOME)/.traceevent/plugins
+set_plugin_dir := 0
+else
+override plugin_dir = $(prefix)/lib/traceevent/plugins
+endif
+endif
+
+ifeq ($(set_plugin_dir),1)
+PLUGIN_DIR = -DPLUGIN_DIR="$(DESTDIR)/$(plugin_dir)"
+PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
+endif
+
# copy a bit from Linux kbuild

ifeq ("$(origin V)", "command line")
@@ -96,6 +120,7 @@ export prefix bindir src obj
# Shell quotes
bindir_SQ = $(subst ','\'',$(bindir))
bindir_relative_SQ = $(subst ','\'',$(bindir_relative))
+plugin_dir_SQ = $(subst ','\'',$(plugin_dir))

LIB_FILE = libtraceevent.a libtraceevent.so

@@ -138,8 +163,8 @@ else
print_app_build = echo ' BUILD '$(OBJ);
print_fpic_compile = echo ' CC FPIC '$(OBJ);
print_shared_lib_compile = echo ' BUILD SHARED LIB '$(OBJ);
- print_plugin_obj_compile = echo ' BUILD PLUGIN OBJ '$(OBJ);
- print_plugin_build = echo ' BUILD PLUGIN '$(OBJ);
+ print_plugin_obj_compile = echo ' CC FPIC '$(OBJ);
+ print_plugin_build = echo ' BUILD PLUGIN '$(OBJ);
print_static_lib_build = echo ' BUILD STATIC LIB '$(OBJ);
print_install = echo ' INSTALL '$1' to $(DESTDIR_SQ)$2';
endif
@@ -187,9 +212,11 @@ PEVENT_LIB_OBJS += parse-filter.o
PEVENT_LIB_OBJS += parse-utils.o
PEVENT_LIB_OBJS += kbuffer-parse.o

-ALL_OBJS = $(PEVENT_LIB_OBJS)
+PLUGINS := $(PLUGIN_OBJS:.o=.so)
+
+ALL_OBJS = $(PEVENT_LIB_OBJS) $(PLUGIN_OBJS)

-CMD_TARGETS = $(LIB_FILE)
+CMD_TARGETS = $(LIB_FILE) $(PLUGINS)

TARGETS = $(CMD_TARGETS)

@@ -204,9 +231,17 @@ libtraceevent.so: $(PEVENT_LIB_OBJS)
libtraceevent.a: $(PEVENT_LIB_OBJS)
$(Q)$(do_build_static_lib)

+plugins: $(PLUGINS)
+
$(PEVENT_LIB_OBJS): %.o: $(src)/%.c TRACEEVENT-CFLAGS
$(Q)$(do_fpic_compile)

+$(PLUGIN_OBJS): %.o : $(src)/%.c
+ $(Q)$(do_compile_plugin_obj)
+
+$(PLUGINS): %.so: %.o
+ $(Q)$(do_plugin_build)
+
define make_version.h
(echo '/* This file is automatically generated. Do not modify. */'; \
echo \#define VERSION_CODE $(shell \
@@ -294,9 +329,16 @@ define do_install
$(INSTALL) $1 '$(DESTDIR_SQ)$2'
endef

-install_lib: all_cmd
+install_lib: all_cmd install_plugins
$(Q)$(call do_install,$(LIB_FILE),$(bindir_SQ))

+PLUGINS_INSTALL = $(subst .so,.install,$(PLUGINS))
+
+$(PLUGINS_INSTALL): %.install : %.so force
+ $(Q)$(call do_install,$<,$(plugin_dir_SQ))
+
+install_plugins: $(PLUGINS_INSTALL)
+
install: install_lib

clean:
--
1.8.3.1