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###############################################################################
#
# CMake script for finding the GFlags library.
#
# https://gflags.github.io/gflags/
#
# Redistribution and use is allowed according to the terms of the 3-clause BSD
# license.
#
# Input variables:
#
# - Gflags_FIND_REQUIRED: throws an error if gflags is not found but it is required
#
# Output variables:
#
# - Gflags_FOUND: Boolean that indicates if the package was found
# - Gflags_LIBRARIES: Package libraries
# - Gflags_INCLUDE_DIRS: Absolute path to package headers
#
# Example usage:
#
# find_package(Gflags REQUIRED)
#
# include_directories(
# ${Gflags_INCLUDE_DIRS}
# )
#
# add_executable(main src/main.cpp)
# target_link_libraries(main
# ${Gflags_LIBRARIES}
# )
###############################################################################
find_path(Gflags_INCLUDE_PATH gflags/gflags.h)
find_library(Gflags_LIBRARY NAMES gflags libgflags)
if(Gflags_INCLUDE_PATH AND Gflags_LIBRARY)
set(Gflags_FOUND TRUE)
endif(Gflags_INCLUDE_PATH AND Gflags_LIBRARY)
if(Gflags_FOUND)
message(STATUS "Found gflags: ${Gflags_LIBRARY}")
# Output variables
set(Gflags_INCLUDE_DIRS ${Gflags_INCLUDE_DIR})
set(Gflags_LIBRARIES ${Gflags_LIBRARY})
else(Gflags_FOUND)
if(Gflags_FIND_REQUIRED)
message(FATAL_ERROR "Could not find gflags library.")
endif(Gflags_FIND_REQUIRED)
endif(Gflags_FOUND)
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