[PATCH 5/8] libtracefs: Allow the pkg-config libs and cflags prefix to be overwritten

[Steven Rostedt <rostedt@goodmis.org>]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

In case libtracecmd needs to be built in a destination directory where
libtracefs will be located, and not on the host machine, it will need a
way to override the location of the include and library directories.
Facilitate this by having them use the ${prefix} variable.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 Makefile               | 7 ++++---
 libtracefs.pc.template | 4 ++--
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index ab64ef3e4f54..142b824ca421 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,8 @@ man_dir = $(prefix)/share/man
 man_dir_SQ = '$(subst ','\'',$(man_dir))'
 libdir = $(prefix)/$(libdir_relative)
 libdir_SQ = '$(subst ','\'',$(libdir))'
-includedir = $(prefix)/include/tracefs
+includedir_relative ?= include/tracefs
+includedir = $(prefix)/$(includedir_relative)
 includedir_SQ = '$(subst ','\'',$(includedir))'
 pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) 		\
 			--variable pc_path pkg-config | tr ":" " "))
@@ -193,8 +194,8 @@ define do_make_pkgconfig_file
 	cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE};	\
 	sed -i "s|INSTALL_PREFIX|${1}|g" ${PKG_CONFIG_FILE}; 		\
 	sed -i "s|LIB_VERSION|${TRACEFS_VERSION}|g" ${PKG_CONFIG_FILE}; \
-	sed -i "s|LIB_DIR|${libdir}|g" ${PKG_CONFIG_FILE}; \
-	sed -i "s|HEADER_DIR|$(includedir)|g" ${PKG_CONFIG_FILE};
+	sed -i "s|LIB_DIR|${libdir_relative}|g" ${PKG_CONFIG_FILE}; \
+	sed -i "s|HEADER_DIR|$(includedir_relative)|g" ${PKG_CONFIG_FILE};
 endef
 
 BUILD_PREFIX := $(BUILD_OUTPUT)/build_prefix
diff --git a/libtracefs.pc.template b/libtracefs.pc.template
index 5e7d54a4456c..a674fee24007 100644
--- a/libtracefs.pc.template
+++ b/libtracefs.pc.template
@@ -1,6 +1,6 @@
 prefix=INSTALL_PREFIX
-libdir=LIB_DIR
-includedir=HEADER_DIR
+libdir=${prefix}/LIB_DIR
+includedir=${prefix}/HEADER_DIR
 
 Name: libtracefs
 URL: https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/
-- 
2.29.2