[PATCH v1] libdvbv5: add optional copy of TEMP_FAILURE_RETRY macro (fix musl compile)

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Fixes:

  ../../lib/libdvbv5/.libs/libdvbv5.so: undefined reference to `TEMP_FAILURE_RETRY'

Signed-off-by: Peter Seiderer <ps.report@xxxxxxx>
---
 lib/libdvbv5/dvb-dev-local.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/libdvbv5/dvb-dev-local.c b/lib/libdvbv5/dvb-dev-local.c
index 8bc99d1..7a76d65 100644
--- a/lib/libdvbv5/dvb-dev-local.c
+++ b/lib/libdvbv5/dvb-dev-local.c
@@ -44,6 +44,15 @@
 # define _(string) string
 #endif
 
+/* taken from glibc unistd.h */
+#ifndef TEMP_FAILURE_RETRY
+#define TEMP_FAILURE_RETRY(expression) \
+    ({ long int __result;                                                     \
+       do __result = (long int) (expression);                                 \
+       while (__result == -1L && errno == EINTR);                             \
+       __result; })
+#endif
+
 struct dvb_dev_local_priv {
 	dvb_dev_change_t notify_dev_change;
 
-- 
2.16.2




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