BUILD: makefile: add a "USE_PROMEX" variable to ease building prometheus-exporter
The Prometheus exporter has gained in popularity and deserves to be easier
to build. Let's add a standard "USE_PROMEX" variable to enable it without
having to modify EXTRA_OBJS nor fiddling with the build path. The readme
was updated to reflect this.
diff --git a/contrib/prometheus-exporter/README b/contrib/prometheus-exporter/README
index fdbc502..e41ebdc 100644
--- a/contrib/prometheus-exporter/README
+++ b/contrib/prometheus-exporter/README
@@ -12,9 +12,10 @@
However, PROMEX is not built by default with HAProxy. It is provided as an extra
component for everyone want to use it. So you need to explicitly build HAProxy
-with the PROMEX service, using the Makefile variable "EXTRA_OBJS". For instance:
+with the PROMEX service, setting the Makefile variable "USE_PROMEX" to "1". For
+instance:
- > make TARGET=linux-glibc EXTRA_OBJS="contrib/prometheus-exporter/service-prometheus.o"
+ > make TARGET=linux-glibc USE_PROMEX=1
if HAProxy provides the PROMEX service, the following build option will be
reported by the command "haproxy -vv":