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LevelDB-course-Lab
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LevelDB-course-Lab/port/port_config.h.in

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Add CMake build support. Fixes https://github.com/google/leveldb/issues/466 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=189425354
6 年之前
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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
5 年之前
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Add CMake build support. Fixes https://github.com/google/leveldb/issues/466 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=189425354
6 年之前
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  1. // Copyright 2017 The LevelDB Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file. See the AUTHORS file for names of contributors.
  4. 

  5. #ifndef STORAGE_LEVELDB_PORT_PORT_CONFIG_H_
  6. #define STORAGE_LEVELDB_PORT_PORT_CONFIG_H_
  7. 

  8. // Define to 1 if you have a definition for fdatasync() in <unistd.h>.
  9. #if !defined(HAVE_FDATASYNC)
  10. #cmakedefine01 HAVE_FDATASYNC
  11. #endif  // !defined(HAVE_FDATASYNC)
  12. 

  13. // Define to 1 if you have Google CRC32C.
  14. #if !defined(HAVE_CRC32C)
  15. #cmakedefine01 HAVE_CRC32C
  16. #endif  // !defined(HAVE_CRC32C)
  17. 

  18. // Define to 1 if you have Google Snappy.
  19. #if !defined(HAVE_SNAPPY)
  20. #cmakedefine01 HAVE_SNAPPY
  21. #endif  // !defined(HAVE_SNAPPY)
  22. 

  23. // Define to 1 if your processor stores words with the most significant byte
  24. // first (like Motorola and SPARC, unlike Intel and VAX).
  25. #if !defined(LEVELDB_IS_BIG_ENDIAN)
  26. #cmakedefine01 LEVELDB_IS_BIG_ENDIAN
  27. #endif  // !defined(LEVELDB_IS_BIG_ENDIAN)
  28. 

  29. #endif  // STORAGE_LEVELDB_PORT_PORT_CONFIG_H_