From: Ben Harris <bjh21@bjh21.me.uk>
Date: Sat, 24 Nov 2018 11:12:03 +0000 (+0000)
Subject: Control libgpiod code with #ifdef.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=697f66aecc490df1e2d4f402f7a434ae30e79b49;p=clunk.git

Control libgpiod code with #ifdef.

That way I can build on older Linux systems.
---

diff --git a/clunk.c b/clunk.c
index 868a5c8..0637a71 100644
--- a/clunk.c
+++ b/clunk.c
@@ -3,7 +3,9 @@
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
+#ifdef WITH_LIBGPIOD
 #include <gpiod.h>
+#endif /* WITH_LIBGPIOD */
 #include <signal.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -64,6 +66,7 @@ dummy_out(bool state)
 	}
 }
 
+#ifdef WITH_LIBGPIOD
 static struct gpiod_line *libgpiod_line;
 
 static void
@@ -73,6 +76,7 @@ libgpiod_out(bool state)
 	if (gpiod_line_set_value(libgpiod_line, state) == -1)
 		err(1, "gpiod_line_set_value");
 }
+#endif /* WITH_LIBGPIOD */
 
 static void (*outfn)(bool) = &dummy_out;
 
@@ -189,6 +193,7 @@ init_statefile(char const *statefilename)
 	}
 }
 
+#ifdef WITH_LIBGPIOD
 static void
 init_libgpiod(char const *gpio_name)
 {
@@ -200,6 +205,7 @@ init_libgpiod(char const *gpio_name)
 		err(1, "requesting '%s'", gpio_name);
 	outfn = &libgpiod_out;
 }
+#endif /* WITH_LIBGPIOD */
 
 static void
 init(int argc, char **argv)
@@ -226,7 +232,11 @@ init(int argc, char **argv)
 	if (timer_create(CLOCK_REALTIME, &sev, &main_timer) != 0)
 		err(1, "timer_create");
 
-	while ((opt = getopt(argc, argv, "f:g:s:")) != -1) {
+	while ((opt = getopt(argc, argv, "f:s:"
+#ifdef WITH_LIBGPIOD
+			     "g:"
+#endif /* WITH_LIBGPIOD */
+			)) != -1) {
 		switch (opt) {
 		case 'f':
 			statefile = optarg;
@@ -234,9 +244,11 @@ init(int argc, char **argv)
 		case 's':
 			statestr = optarg;
 			break;
+#ifdef WITH_LIBGPIOD
 		case 'g':
 			init_libgpiod(optarg);
 			break;
+#endif /* WITH_LIBGPIOD */
 		}
 	}
 	if (statefile != NULL)