CMake/FindLZ4.cmake

   1 # Finds liblz4.
   2 #
   3 # This module defines:
   4 # LZ4_FOUND
   5 # LZ4_INCLUDE_DIR
   6 # LZ4_LIBRARY
   7 #
   8
   9 find_path(LZ4_INCLUDE_DIR NAMES lz4.h)
  10 find_library(LZ4_LIBRARY NAMES lz4)
  11
  12 # fb-mysql requires LZ4F_resetDecompressionContext() which was added in v1.8.0
  13 if (LZ4_LIBRARY)
  14   include(CheckCSourceRuns)
  15   set(CMAKE_REQUIRED_INCLUDES ${LZ4_INCLUDE_DIR})
  16   set(CMAKE_REQUIRED_LIBRARIES ${LZ4_LIBRARY})
  17   check_c_source_runs("
  18 #include <lz4.h>
  19 int main() {
  20   int good = (LZ4_VERSION_MAJOR > 1) ||
  21     ((LZ4_VERSION_MAJOR == 1) && (LZ4_VERSION_MINOR >= 8));
  22 return !good;
  23 }" LZ4_GOOD_VERSION)
  24   set(CMAKE_REQUIRED_INCLUDES)
  25   set(CMAKE_REQUIRED_LIBRARIES)
  26 endif()
  27
  28 include(FindPackageHandleStandardArgs)
  29 FIND_PACKAGE_HANDLE_STANDARD_ARGS(
  30     LZ4 DEFAULT_MSG
  31     LZ4_LIBRARY LZ4_INCLUDE_DIR LZ4_GOOD_VERSION)
  32
  33 if (NOT LZ4_FOUND)
  34   message(STATUS "Using third-party bundled LZ4")
  35 else()
  36   message(STATUS "Found LZ4: ${LZ4_LIBRARY}")
  37 endif (NOT LZ4_FOUND)
  38
  39 mark_as_advanced(LZ4_INCLUDE_DIR LZ4_LIBRARY)