From 85064d3d24c90a3b836c2c3280ad38761943450b Mon Sep 17 00:00:00 2001
From: Peter Griess <pgriess@fb.com>
Date: Mon, 7 Oct 2013 08:38:11 -0700
Subject: [PATCH] Use #if rather than #ifdef to check autoconf guards.

Summary:
- Replace instances of '#ifdef FOLLY_*' guards with '#if FOLLY_*'. This
allows the configuration system to disable the guard by defining the
value to 0 using the -D compiler flag.

Test Plan:
- fbconfig -r folly && fbmake runtests
- ./configure && make check on Ubuntu/FC/Mac

Reviewed By: delong.j@fb.com

FB internal diff: D999129
---
 folly/FileUtil.cpp          | 4 ++--
 folly/FileUtil.h            | 4 ++--
 folly/Malloc.h              | 2 +-
 folly/Portability.h         | 4 ++--
 folly/io/RecordIO.cpp       | 2 +-
 folly/small_vector.h        | 4 ++--
 folly/test/FileUtilTest.cpp | 2 +-
 7 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/folly/FileUtil.cpp b/folly/FileUtil.cpp
index 0c719a87..2977757f 100644
--- a/folly/FileUtil.cpp
+++ b/folly/FileUtil.cpp
@@ -132,7 +132,7 @@ ssize_t readvFull(int fd, iovec* iov, int count) {
   return wrapvFull(readv, fd, iov, count);
 }
 
-#ifdef FOLLY_HAVE_PREADV
+#if FOLLY_HAVE_PREADV
 ssize_t preadvFull(int fd, iovec* iov, int count, off_t offset) {
   return wrapvFull(preadv, fd, iov, count, offset);
 }
@@ -142,7 +142,7 @@ ssize_t writevFull(int fd, iovec* iov, int count) {
   return wrapvFull(writev, fd, iov, count);
 }
 
-#ifdef FOLLY_HAVE_PWRITEV
+#if FOLLY_HAVE_PWRITEV
 ssize_t pwritevFull(int fd, iovec* iov, int count, off_t offset) {
   return wrapvFull(pwritev, fd, iov, count, offset);
 }
diff --git a/folly/FileUtil.h b/folly/FileUtil.h
index 93b843bf..6b9325ae 100644
--- a/folly/FileUtil.h
+++ b/folly/FileUtil.h
@@ -77,7 +77,7 @@ ssize_t writevNoInt(int fd, const iovec* iov, int count);
 ssize_t readFull(int fd, void* buf, size_t n);
 ssize_t preadFull(int fd, void* buf, size_t n, off_t offset);
 ssize_t readvFull(int fd, iovec* iov, int count);
-#ifdef FOLLY_HAVE_PREADV
+#if FOLLY_HAVE_PREADV
 ssize_t preadvFull(int fd, iovec* iov, int count, off_t offset);
 #endif
 
@@ -98,7 +98,7 @@ ssize_t preadvFull(int fd, iovec* iov, int count, off_t offset);
 ssize_t writeFull(int fd, const void* buf, size_t n);
 ssize_t pwriteFull(int fd, const void* buf, size_t n, off_t offset);
 ssize_t writevFull(int fd, iovec* iov, int count);
-#ifdef FOLLY_HAVE_PWRITEV
+#if FOLLY_HAVE_PWRITEV
 ssize_t pwritevFull(int fd, iovec* iov, int count, off_t offset);
 #endif
 
diff --git a/folly/Malloc.h b/folly/Malloc.h
index 94a172b3..f7c94ca1 100644
--- a/folly/Malloc.h
+++ b/folly/Malloc.h
@@ -49,7 +49,7 @@ namespace folly {
 // for malloc_usable_size
 // NOTE: FreeBSD 9 doesn't have malloc.h.  It's defitions
 // are found in stdlib.h.
-#ifdef FOLLY_HAVE_MALLOC_H
+#if FOLLY_HAVE_MALLOC_H
 #include <malloc.h>
 #else
 #include <stdlib.h>
diff --git a/folly/Portability.h b/folly/Portability.h
index fe38d6b5..1095164f 100644
--- a/folly/Portability.h
+++ b/folly/Portability.h
@@ -21,12 +21,12 @@
 #include "folly-config.h"
 #endif
 
-#ifdef FOLLY_HAVE_FEATURES_H
+#if FOLLY_HAVE_FEATURES_H
 #include <features.h>
 #endif
 
 
-#ifdef FOLLY_HAVE_SCHED_H
+#if FOLLY_HAVE_SCHED_H
  #include <sched.h>
  #ifndef FOLLY_HAVE_PTHREAD_YIELD
   #define pthread_yield sched_yield
diff --git a/folly/io/RecordIO.cpp b/folly/io/RecordIO.cpp
index a4075057..9dcf3c91 100644
--- a/folly/io/RecordIO.cpp
+++ b/folly/io/RecordIO.cpp
@@ -56,7 +56,7 @@ void RecordIOWriter::write(std::unique_ptr<IOBuf> buf) {
   // We're going to write.  Reserve space for ourselves.
   off_t pos = filePos_.fetch_add(totalLength);
 
-#ifdef FOLLY_HAVE_PWRITEV
+#if FOLLY_HAVE_PWRITEV
   auto iov = buf->getIov();
   ssize_t bytes = pwritevFull(file_.fd(), iov.data(), iov.size(), pos);
 #else
diff --git a/folly/small_vector.h b/folly/small_vector.h
index ed2c44f1..373b8393 100644
--- a/folly/small_vector.h
+++ b/folly/small_vector.h
@@ -54,9 +54,9 @@
 # define FB_PACKED
 #endif
 
-#ifdef FOLLY_HAVE_MALLOC_SIZE
+#if FOLLY_HAVE_MALLOC_SIZE
   extern "C" std::size_t malloc_size(const void*);
-# ifndef FOLLY_HAVE_MALLOC_USABLE_SIZE
+# if !FOLLY_HAVE_MALLOC_USABLE_SIZE
 #  define malloc_usable_size malloc_size
 # endif
 # ifndef malloc_usable_size
diff --git a/folly/test/FileUtilTest.cpp b/folly/test/FileUtilTest.cpp
index b35a3abe..f466f11f 100644
--- a/folly/test/FileUtilTest.cpp
+++ b/folly/test/FileUtilTest.cpp
@@ -222,7 +222,7 @@ TEST_F(FileUtilTest, readv) {
   }
 }
 
-#ifdef FOLLY_HAVE_PREADV
+#if FOLLY_HAVE_PREADV
 TEST_F(FileUtilTest, preadv) {
   for (auto& p : readers_) {
     IovecBuffers buf({12, 19, 31});
-- 
2.34.1