[PATCH] libtraceevent: allow custom libdir path

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

When I use prefix=/usr and try to install libtraceevent in my laptop it
tries to install in /usr/lib64. I am not having any folder as /usr/lib64
and also the debian policy doesnot allow installing in /usr/lib64. It
should be in /usr/lib/x86_64-linux-gnu/.

Quote: No package for a 64 bit architecture may install files in
	/usr/lib64/ or in a subdirectory of it.
ref: https://www.debian.org/doc/debian-policy/ch-opersys.html

Make it more flexible by allowing to mention libdir_relative while
installing so that distros can mention the path according to their policy
or use the default one.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---

Hi Steve,

And yet another one (hopefully the final one for now). I know I missed
the merge window, but your Ack should be ok.

 tools/lib/traceevent/Makefile         | 5 +++--
 tools/lib/traceevent/plugins/Makefile | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index c5a03356a999..7e2450ddd7e1 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -39,11 +39,12 @@ DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
 
 LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
 ifeq ($(LP64), 1)
-  libdir_relative = lib64
+  libdir_relative_temp = lib64
 else
-  libdir_relative = lib
+  libdir_relative_temp = lib
 endif
 
+libdir_relative ?= $(libdir_relative_temp)
 prefix ?= /usr/local
 libdir = $(prefix)/$(libdir_relative)
 man_dir = $(prefix)/share/man
diff --git a/tools/lib/traceevent/plugins/Makefile b/tools/lib/traceevent/plugins/Makefile
index f440989fa55e..edb046151305 100644
--- a/tools/lib/traceevent/plugins/Makefile
+++ b/tools/lib/traceevent/plugins/Makefile
@@ -32,11 +32,12 @@ DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
 
 LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
 ifeq ($(LP64), 1)
-  libdir_relative = lib64
+  libdir_relative_tmp = lib64
 else
-  libdir_relative = lib
+  libdir_relative_tmp = lib
 endif
 
+libdir_relative ?= $(libdir_relative_tmp)
 prefix ?= /usr/local
 libdir = $(prefix)/$(libdir_relative)
 
-- 
2.11.0