trace: add high resolution timer function to debug performance issues

diff --git a/Makefile b/Makefile
index 07ea1058379ab963648d0df7fd2917e0d2efa8a7..80f4390abb2cb1dedf9ce49cd7fb0a40db6663da 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -340,6 +340,8 @@ all::
 #
 # Define GMTIME_UNRELIABLE_ERRORS if your gmtime() function does not
 # return NULL when it receives a bogus time_t.
+#
+# Define HAVE_CLOCK_GETTIME if your platform has clock_gettime in librt.
 
 GIT-VERSION-FILE: FORCE
        @$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -1497,6 +1499,11 @@ ifdef GMTIME_UNRELIABLE_ERRORS
        BASIC_CFLAGS += -DGMTIME_UNRELIABLE_ERRORS
 endif
 
+ifdef HAVE_CLOCK_GETTIME
+       BASIC_CFLAGS += -DHAVE_CLOCK_GETTIME
+       EXTLIBS += -lrt
+endif
+
 ifeq ($(TCLTK_PATH),)
 NO_TCLTK = NoThanks
 endif