[PATCH] imap-send: avoid curl functions when not building curl support

[Jeff King <peff@peff.net>]

Imap-send recently learned to conditionally compile against
and use curl for imap support. To use this feature, you must
both:

  1. Compile with USE_CURL_FOR_IMAP_SEND

  2. Specify --curl on the command line to enable it

It is OK (and even desirable) for the code checking --curl
to be compiled even if USE_CURL_FOR_IMAP_SEND is not in
effect; this lets us explain the situation to the user
(instead of saying "--curl? never heard of it").

However, the code which conditionally runs when --curl is
enabled must _not_ be compiled in this case. It references
functions which are neither declared nor defined, causing
the compiler to complain.

Signed-off-by: Jeff King <peff@peff.net>
---
On top of br/imap-send-via-libcurl. I needed this to compile 'pu' with
NO_CURL (which I don't usually do, but was testing on a minimal box). I
expect it can just be squashed in to the next re-roll.

Since we were talking about testing in another thread, Junio, I wonder
if it is worth having you compile your integration results against a
couple different configs (e.g., NO_CURL). Obviously that will make
things slower if you don't throw more CPU power at it, but that seems
like a problem that can be solved with build servers or similar.

 imap-send.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/imap-send.c b/imap-send.c
index ad4ac22..e0e1f09 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1542,8 +1542,10 @@ int main(int argc, char **argv)
 	if (server.tunnel)
 		return append_msgs_to_imap(&server, &all_msgs, total);
 
+#ifdef USE_CURL_FOR_IMAP_SEND
 	if (use_curl)
 		return curl_append_msgs_to_imap(&server, &all_msgs, total);
+#endif
 
 	return append_msgs_to_imap(&server, &all_msgs, total);
 }
-- 
2.1.2.596.g7379948