Add compile time version numbers

Uses git tags as version number

2 files changed, 10 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 7659c27..d2accc5 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,10 @@ FTPHELPERDIR=/usr/bin
 PHPSDIR=php
 WWWDIR=/var/www
 
+GITTAGFLAG := -D'VERSION_STRING="$(shell LC_ALL=C git describe --tags)"'
+MODBUSLOGCFLAGS += $(GITTAGFLAG)
+FTPHELPERCFLAGS += $(GITTAGFLAG)
+
 all: modbuslog ftphelper
 
 modbuslog: $(SDIR)/modbuslog.c
diff --git a/src/modbuslog.c b/src/modbuslog.c
index ec0e10e..7813aa3 100644
--- a/src/modbuslog.c
+++ b/src/modbuslog.c
@@ -19,6 +19,10 @@
 
 // gcc modbuslog.c -o modbuslog `pkg-config --libs --cflags libmodbus libconfig`
 
+#ifndef VERSION_STRING
+#define VERSION_STRING "[undefined version]"
+#endif
+
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
@@ -83,7 +87,8 @@ int main(int argc, char *argv[]) {
 	}
 
 	openlog("modbuslog", SYSLOG_CONSOLE_OUTPUT | LOG_PID | LOG_CONS, LOG_USER);
-	syslog(LOG_INFO, "modbuslog starting");
+
+	syslog(LOG_INFO, "modbuslog %s starting",VERSION_STRING);
 
 	const char *configfile = "/etc/modbuslog.cfg";
 	config_t cfg;