diff -u -r ../php-7.1.3/ext/pgsql/config.m4 ./ext/pgsql/config.m4
--- ../php-7.1.3/ext/pgsql/config.m4	2017-03-14 14:17:47.000000000 +0100
+++ ./ext/pgsql/config.m4	2017-03-30 23:24:49.664225152 +0200
@@ -101,6 +101,11 @@
   LDFLAGS=$old_LDFLAGS
 
   PHP_ADD_LIBRARY_WITH_PATH(pq, $PGSQL_LIBDIR, PGSQL_SHARED_LIBADD)
+  dnl The pgsql extension uses pcre so needs to link explicitly
+  dnl against it to work on android (the php binary, which dlopen():s
+  dnl this module already links to pcre, but that is not enough on
+  dnl Android, see https://github.com/android-ndk/ndk/issues/201):
+  PHP_ADD_LIBRARY_WITH_PATH(pcre, $PGSQL_LIBDIR, PGSQL_SHARED_LIBADD)
   PHP_SUBST(PGSQL_SHARED_LIBADD)
 
   PHP_ADD_INCLUDE($PGSQL_INCLUDE)