Timur Davydov has uploaded this change for review.

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build: make timerfd usage optional

Check for sys/timerfd.h in configure and guard its usage
with HAVE_SYS_TIMERFD_H.

This avoids build failures on platforms where timerfd is
not available.

Change-Id: Id5a700c865f984e8f99199a1e365bb7f1462030a
---
M configure.ac
M src/osmo-bts-trx/scheduler_trx.c
2 files changed, 7 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/89/42689/1

diff --git a/configure.ac b/configure.ac
index d18d8b3..1d69bc3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -326,6 +326,11 @@
 	AC_DEFINE(HAVE_LINUX_IF_PACKET_H, 1, [Define if we found linux/if_packet.h])
 fi
 
+AC_CHECK_HEADER([sys/timerfd.h], [sys_timerfd_header="yes"], [])
+if test "x$sys_timerfd_header" = "xyes" ; then
+	AC_DEFINE(HAVE_SYS_TIMERFD_H, 1, [Define if we found sys/timerfd.h])
+fi
+
 # Generate manuals
 AC_ARG_ENABLE(manuals,
 	[AS_HELP_STRING(
diff --git a/src/osmo-bts-trx/scheduler_trx.c b/src/osmo-bts-trx/scheduler_trx.c
index a9a53f6..99efdf6 100644
--- a/src/osmo-bts-trx/scheduler_trx.c
+++ b/src/osmo-bts-trx/scheduler_trx.c
@@ -28,7 +28,9 @@
 #include <stdint.h>
 #include <ctype.h>
 #include <inttypes.h>
+#ifdef HAVE_SYS_TIMERFD_H
 #include <sys/timerfd.h>
+#endif
 
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/talloc.h>

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