build: respect PREFIX_STRING on config file locations

When setting a prefix from the build system, also pass this through the
hard coded strings for config file locations in the toolkit, so that the
installed files (which use PREFIX) can be properly found.

Suggested-by: Peter Stuge <peter@stuge.se>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 87adcbb..4591806 100644
--- a/Makefile
+++ b/Makefile
@@ -65,6 +65,7 @@ ifneq ($(wildcard /usr/include/linux/net_tstamp.h),)
   CFLAGS += -D__WITH_HARDWARE_TIMESTAMPING
 endif
 CFLAGS += -DVERSION_STRING=\"$(VERSION_STRING)\"
+CFLAGS += -DPREFIX_STRING=\"$(PREFIX)\"
 CFLAGS += -std=gnu99
 
 WFLAGS  = -Wall