leveldb/port/port_config.h.in

// Copyright 2017 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.

#ifndef STORAGE_LEVELDB_PORT_PORT_CONFIG_H_
#define STORAGE_LEVELDB_PORT_PORT_CONFIG_H_

// Define to 1 if you have a definition for fdatasync() in <unistd.h>.
#if !defined(HAVE_FDATASYNC)
#cmakedefine01 HAVE_FDATASYNC
#endif  // !defined(HAVE_FDATASYNC)

// Define to 1 if you have Google CRC32C.
#if !defined(HAVE_CRC32C)
#cmakedefine01 HAVE_CRC32C
#endif  // !defined(HAVE_CRC32C)

// Define to 1 if you have Google Snappy.
#if !defined(HAVE_SNAPPY)
#cmakedefine01 HAVE_SNAPPY
#endif  // !defined(HAVE_SNAPPY)

// Define to 1 if your processor stores words with the most significant byte
// first (like Motorola and SPARC, unlike Intel and VAX).
#if !defined(LEVELDB_IS_BIG_ENDIAN)
#cmakedefine01 LEVELDB_IS_BIG_ENDIAN
#endif  // !defined(LEVELDB_IS_BIG_ENDIAN)

#endif  // STORAGE_LEVELDB_PORT_PORT_CONFIG_H_
Add CMake build support. Fixes https://github.com/google/leveldb/issues/466 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=189425354 2018-03-17 10:10:13 +08:00			`// Copyright 2017 The LevelDB Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style license that can be`
			`// found in the LICENSE file. See the AUTHORS file for names of contributors.`

			`#ifndef STORAGE_LEVELDB_PORT_PORT_CONFIG_H_`
			`#define STORAGE_LEVELDB_PORT_PORT_CONFIG_H_`

			`// Define to 1 if you have a definition for fdatasync() in <unistd.h>.`
Fix fdatasync() feature detection in opensource build. The CMake feature-detection code used check_symbol_exists(), which invokes the C compiler. However, some glibc versions don't expose the fdatasync() declaration when compiled with -std=c11, but do expose it when compiled with -std=c++11. This most likely comes down to how _POSIX_SOURCE is defined -- it needs to be >= 201112L for <unistd.h> to expose fdatasync(). This CL switches to check_cxx_symbol_exists(), which uses the C++ compiler. Asides from fixing the problem above, this is the right thing to do, because we use <unistd.h> in env_posix.cc, which is compiled with the C++ compiler. This CL also fixes a previously introduced inconsistency, where the macro indicating the fdatasync() feature detection result was referred to as HAVE_FDATASYNC and HAVE_FUNC_FDATASYNC. The former appears to be used in other libraries, so this CL switches all our references to HAVE_FDATASYNC. Fixes https://github.com/google/leveldb/issues/629 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=228392612 2019-01-09 05:49:13 +08:00			`#if !defined(HAVE_FDATASYNC)`
			`#cmakedefine01 HAVE_FDATASYNC`
			`#endif // !defined(HAVE_FDATASYNC)`
Add CMake build support. Fixes https://github.com/google/leveldb/issues/466 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=189425354 2018-03-17 10:10:13 +08:00
			`// Define to 1 if you have Google CRC32C.`
			`#if !defined(HAVE_CRC32C)`
			`#cmakedefine01 HAVE_CRC32C`
			`#endif // !defined(HAVE_CRC32C)`

			`// Define to 1 if you have Google Snappy.`
			`#if !defined(HAVE_SNAPPY)`
			`#cmakedefine01 HAVE_SNAPPY`
			`#endif // !defined(HAVE_SNAPPY)`

			`// Define to 1 if your processor stores words with the most significant byte`
			`// first (like Motorola and SPARC, unlike Intel and VAX).`
			`#if !defined(LEVELDB_IS_BIG_ENDIAN)`
			`#cmakedefine01 LEVELDB_IS_BIG_ENDIAN`
			`#endif // !defined(LEVELDB_IS_BIG_ENDIAN)`

			`#endif // STORAGE_LEVELDB_PORT_PORT_CONFIG_H_`