diff -u --recursive dovecot-2.2.35-vanilla/configure.ac dovecot-2.2.35/configure.ac
--- dovecot-2.2.35-vanilla/configure.ac	2018-03-19 08:22:42.000000000 -0400
+++ dovecot-2.2.35/configure.ac	2018-05-25 10:41:36.122503480 -0400
@@ -490,9 +490,10 @@
 
 if test "$ioloop" = "best" || test "$ioloop" = "epoll"; then
   AC_CACHE_CHECK([whether we can use epoll],i_cv_epoll_works,[
-    AC_TRY_RUN([
+    AC_TRY_LINK([
       #include <sys/epoll.h>
   
+    ], [
       int main()
       {
 	return epoll_create(5) < 1;
@@ -596,7 +597,7 @@
 dnl * Old glibcs have broken posix_fallocate(). Make sure not to use it.
 dnl * It may also be broken in AIX.
 AC_CACHE_CHECK([whether posix_fallocate() works],i_cv_posix_fallocate_works,[
-  AC_TRY_RUN([
+  AC_TRY_LINK([
     #define _XOPEN_SOURCE 600
     #include <stdio.h>
     #include <stdlib.h>
@@ -605,6 +606,7 @@
     #if defined(__GLIBC__) && (__GLIBC__ < 2 || __GLIBC_MINOR__ < 7)
       possibly broken posix_fallocate
     #endif
+  ], [
     int main() {
       int fd = creat("conftest.temp", 0600);
       int ret;
@@ -2059,7 +2061,7 @@
 
 				# does the kerberos library support SPNEGO?
 				AC_CACHE_CHECK([whether GSSAPI supports SPNEGO],i_cv_gssapi_spnego,[
-				  AC_TRY_RUN([
+				  AC_TRY_LINK([
 				    #ifdef HAVE_GSSAPI_H
 				    #  include <gssapi.h>
 				    #else
@@ -2067,6 +2069,7 @@
 				    #endif
 				    #include <krb5.h>
 				    #include <string.h>
+                                  ], [
 				    int main(void) {
 				      OM_uint32 minor_status;
 				      gss_OID_set mech_set;