acpid: only display -p if supported in usage

Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/util-linux/acpid.c b/util-linux/acpid.c
index 95f8150e2..fc8215cce 100644
--- a/util-linux/acpid.c
+++ b/util-linux/acpid.c
@@ -42,7 +42,9 @@
 //usage:     "\n        -c DIR  Config directory [/etc/acpi]"
 //usage:     "\n        -e FILE /proc event file [/proc/acpi/event]"
 //usage:     "\n        -l FILE Log file [/var/log/acpid.log]"
-//usage:     "\n        -p FILE Pid file [/var/run/acpid.pid]"
+//usage:        IF_FEATURE_PIDFILE(
+//usage:     "\n        -p FILE Pid file [" CONFIG_PID_FILE_PATH "/acpid.pid]"
+//usage:        )
 //usage:     "\n        -a FILE Action file [/etc/acpid.conf]"
 //usage:     "\n        -M FILE Map file [/etc/acpi.map]"
 //usage:        IF_FEATURE_ACPID_COMPAT(