Remove the select.h header from examples if autoconf cannot find it.

configure.ac

@@ -53,7 +53,7 @@ AC_CHECK_SIZEOF([off_t])
 
 # Check headers/libs
 AC_CHECK_FUNCS([gethostbyname getaddrinfo gettimeofday inet_ntoa memset socket])
-AC_CHECK_HEADERS([sys/time.h pty.h util.h termios.h])
+AC_CHECK_HEADERS([sys/select.h sys/time.h pty.h util.h termios.h])
 AC_CHECK_LIB([network],[socket])
 AC_CHECK_LIB([util],[forkpty])
 AC_CHECK_LIB([wolfssl],[wolfCrypt_Init],,[AC_MSG_ERROR([libwolfssl is required for ${PACKAGE}. It can be obtained from https://www.wolfssl.com/download.html/ .])])

examples/client/client.c

@@ -51,7 +51,9 @@
     #include <sys/un.h>
 #endif /* WOLFSSH_AGENT */
 
-#include <sys/select.h>
+#ifdef HAVE_SYS_SELECT_H
+    #include <sys/select.h>
+#endif
 
 
 #ifndef NO_WOLFSSH_CLIENT

examples/echoserver/echoserver.c

@@ -77,7 +77,9 @@
     #include <sys/un.h>
 #endif /* WOLFSSH_AGENT */
 
-#include <sys/select.h>
+#ifdef HAVE_SYS_SELECT_H
+    #include <sys/select.h>
+#endif
 
 
 #ifndef NO_WOLFSSH_SERVER

examples/portfwd/portfwd.c

@@ -23,9 +23,13 @@
 
 
 #include <stdio.h>
-#include <termios.h>
+#ifdef HAVE_TERMIOS_H
+    #include <termios.h>
+#endif
 #include <errno.h>
-#include <sys/select.h>
+#ifdef HAVE_SYS_SELECT_H
+    #include <sys/select.h>
+#endif
 #include <wolfssh/ssh.h>
 #include <wolfssh/test.h>
 #include <wolfssh/port.h>