Added AM_CPPFLAGS to CFLAGS that are used for curl checks, because

they're needed on Cygwin.  (Without _GNU_SOURCE, sys/types.h doesn't
include sys/select.h.)  Also added AM_CFLAGS, which we don't currently
use but might in the future.

diff --git a/configure.ac b/configure.ac
index 492adfda692eecc41f304c883135f7d8e5f39237..90066258dde763d1c018d4a50caa69f89c750f76 100755 (executable)
--- a/configure.ac
+++ b/configure.ac
@@ -485,7 +485,7 @@ dnl Look for curl if oauth not disabled (--without-oauth).
 AC_PATH_PROG([curl_config], [curl-config])
 AS_IF([test "x$with_oauth" != xno && test -n "$curl_config"], [
     save_CFLAGS="$CFLAGS"
-    CFLAGS="$CFLAGS `$curl_config --cflags`"
+    CFLAGS="$AM_CPPFLAGS $AM_CFLAGS $CFLAGS `$curl_config --cflags`"
     AC_CHECK_HEADER([curl/curl.h], [
         HAVE_CURL_H=1
         AC_CHECK_LIB([curl], [curl_easy_init], [