Timur Davydov has uploaded this change for review.

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build: make sched_* usage optional

Add configure checks for sched_* APIs and guard usage of
sched_setscheduler with HAVE_SCHED_SETSCHEDULER.

This avoids build/runtime issues on platforms without
scheduler support.

Change-Id: I5af357c1e2074fa1e05ac6bc20af8535c474d906
---
M configure.ac
M src/common/main.c
2 files changed, 6 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/90/42690/1

diff --git a/configure.ac b/configure.ac
index 1d69bc3..8f8e0d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -331,6 +331,10 @@
 	AC_DEFINE(HAVE_SYS_TIMERFD_H, 1, [Define if we found sys/timerfd.h])
 fi
 
+dnl Check the scheduller functions
+AC_CHECK_HEADERS([sched.h])
+AC_CHECK_FUNCS([sched_setaffinity sched_setscheduler])
+
 # Generate manuals
 AC_ARG_ENABLE(manuals,
 	[AS_HELP_STRING(
diff --git a/src/common/main.c b/src/common/main.c
index 2bdd8ce..8327b57 100644
--- a/src/common/main.c
+++ b/src/common/main.c
@@ -305,6 +305,7 @@
 		exit(1);
 	}
 
+#ifdef HAVE_SCHED_SETSCHEDULER
 	/* enable realtime priority for us */
 	if (rt_prio != -1) {
 		struct sched_param param;
@@ -318,6 +319,7 @@
 			exit(1);
 		}
 	}
+#endif /* HAVE_SCHED_SETSCHEDULER */
 
 	if (bts_init(g_bts) < 0) {
 		fprintf(stderr, "unable to open bts\n");

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