libtraceevent: Copy pkg-config file to output folder when using O=

When we use 'O=' with make to build libtraceevent in a separate folder
it still copies 'libtraceevent.pc' to its source folder. Modify the
Makefile so that it uses the output folder to copy the pkg-config file
and install from there.

Signed-off-by: Sudipm Mukherjee <sudipm.mukherjee@gmail.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20191115113610.21493-2-sudipm.mukherjee@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 83446fe..c5a0335 100644 (file)
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -208,10 +208,11 @@ define do_install
        $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
 endef
 
-PKG_CONFIG_FILE = libtraceevent.pc
+PKG_CONFIG_SOURCE_FILE = libtraceevent.pc
+PKG_CONFIG_FILE := $(addprefix $(OUTPUT),$(PKG_CONFIG_SOURCE_FILE))
 define do_install_pkgconfig_file
        if [ -n "${pkgconfig_dir}" ]; then                                      \
-               cp -f ${PKG_CONFIG_FILE}.template ${PKG_CONFIG_FILE};           \
+               cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE};    \
                sed -i "s|INSTALL_PREFIX|${1}|g" ${PKG_CONFIG_FILE};            \
                sed -i "s|LIB_VERSION|${EVENT_PARSE_VERSION}|g" ${PKG_CONFIG_FILE}; \
                sed -i "s|LIB_DIR|${libdir}|g" ${PKG_CONFIG_FILE}; \