From 52c6db927fd71d3d72bf708d7068c10564505513 Mon Sep 17 00:00:00 2001
From: Elijah Rippeth <elijah.rippeth@gmail.com>
Date: Mon, 6 Jan 2020 11:10:32 -0800
Subject: [PATCH] =?UTF-8?q?conditionally=20include=20=5F=5Fdeclspec=20to?=
 =?UTF-8?q?=20function=20definition=20to=20fix=20Window=E2=80=A6=20(#1584)?=
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Summary:
…s DLL exports.

# Before submitting

- [x] Was this discussed/approved via a Github issue? (no need for typos, doc improvements)
- [x] Did you read the [contributor guideline](https://github.com/pytorch/fairseq/blob/master/CONTRIBUTING.md)?
- [x] Did you make sure to update the docs?
- [x] Did you write any new necessary tests?

## What does this PR do?
Fixes https://github.com/pytorch/fairseq/issues/292

☝️ technically this issue should remain open

## PR review
Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

## Did you have fun?
👍
Pull Request resolved: https://github.com/pytorch/fairseq/pull/1584

Differential Revision: D19289792

Pulled By: myleott

fbshipit-source-id: 96af49e2ed808dde3f682906bc2d6e074b522c39
---
 fairseq/clib/libbleu/libbleu.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fairseq/clib/libbleu/libbleu.cpp b/fairseq/clib/libbleu/libbleu.cpp
index d95bef2de7..3cf2d65b6d 100644
--- a/fairseq/clib/libbleu/libbleu.cpp
+++ b/fairseq/clib/libbleu/libbleu.cpp
@@ -98,10 +98,16 @@ void bleu_addngram(
 
 extern "C" {
 
+#ifdef _WIN64
+__declspec(dllexport) 
+#endif
 void bleu_zero_init(bleu_stat* stat) {
   std::memset(stat, 0, sizeof(bleu_stat));
 }
 
+#ifdef _WIN64
+__declspec(dllexport) 
+#endif
 void bleu_one_init(bleu_stat* stat) {
   bleu_zero_init(stat);
   stat->count1 = 0;
@@ -114,6 +120,9 @@ void bleu_one_init(bleu_stat* stat) {
   stat->match4 = 1;
 }
 
+#ifdef _WIN64
+__declspec(dllexport) 
+#endif
 void bleu_add(
     bleu_stat* stat,
     size_t reflen, int* ref, size_t predlen, int* pred, int pad, int eos) {