select.c: Introduce support for signalfd
The signalfd(2) mechanism of Linux allows signals to be delivered
and processed via normal file descriptor I/O. This avoids any of the
usual problems about re-entrancy of signal processing, as signals can
be processed from the osmocom select() loop abstraction just like any
other event.
Change-Id: If8d89dd1f6989e1cd9b9367fad954d65f91ada30
diff --git a/configure.ac b/configure.ac
index 92457f1..352648b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,7 +62,7 @@
dnl checks for header files
AC_HEADER_STDC
-AC_CHECK_HEADERS(execinfo.h sys/select.h sys/socket.h sys/timerfd.h syslog.h ctype.h netinet/tcp.h netinet/in.h)
+AC_CHECK_HEADERS(execinfo.h sys/select.h sys/socket.h sys/signalfd.h sys/timerfd.h syslog.h ctype.h netinet/tcp.h netinet/in.h)
# for src/conv.c
AC_FUNC_ALLOCA
AC_SEARCH_LIBS([dlopen], [dl dld], [LIBRARY_DLOPEN="$LIBS";LIBS=""])