#

# Input variables:

# - `PROJ_INCLUDE_DIR`

# - `PROJ_LIBRARIES`

# If input variables are not specified, try to find PROJ config.

# Input variables could also be provided as environment variables.

#

# Output targets:

# - `PROJ::proj`

#

# To avoid cyclic calls to this file

list(REMOVE_ITEM CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR})

UNIFY_ENVVARS_AND_CACHE(PROJ_INCLUDE_DIR)

UNIFY_ENVVARS_AND_CACHE(PROJ_LIBRARIES)

if((NOT PROJ_INCLUDE_DIR AND NOT PROJ_LIBRARIES))

find_package(PROJ QUIET CONFIG)

if(NOT PROJ_FOUND)

find_path(PROJ_INCLUDE_DIR proj.h PATHS /usr/include/proj REQUIRED)

if(PROJ_INCLUDE_DIR)

message(STATUS "Found PROJ include files in: ${PROJ_INCLUDE_DIR}")

else()

message(FATAL_ERROR "Unable to find PROJ include directory, specify PROJ_INCLUDE_DIR manually.")

endif()

find_library(PROJ_LIBRARY NAMES proj PATHS /usr/lib/x86_64-linux-gnu)

if(PROJ_LIBRARY)

message(STATUS "PROJ libraries ${PROJ_LIBRARY} found in: ${PROJ_LIBRARY_DIR}")

set(PROJ_LIBRARIES ${PROJ_LIBRARY})

else()

message(FATAL_ERROR "Unable to find PROJ libraries in: ${PROJ_LIBRARY_DIR}")

endif()

add_library(PROJ::proj INTERFACE IMPORTED)

target_include_directories(PROJ::proj INTERFACE "${PROJ_INCLUDE_DIR}")

target_link_libraries(PROJ::proj INTERFACE ${PROJ_LIBRARIES})

target_link_directories(PROJ::proj INTERFACE "${PROJ_LIBRARY}")

endif()

else()

find_library(PROJ_LIBRARY NAMES proj PATHS ${PROJ_LIBRARY_DIR})

if(PROJ_LIBRARY)

message(STATUS "PROJ libraries ${PROJ_LIBRARY} found in: ${PROJ_LIBRARY_DIR}")

set(PROJ_LIBRARIES ${PROJ_LIBRARY})

else()

message(FATAL_ERROR "Unable to find PROJ libraries in: ${PROJ_LIBRARY_DIR}")

endif()

set(PROJ_INCLUDE_DIR ${PROJ_INCLUDE_DIR} CACHE FILEPATH "PROJ header files")

message(STATUS "Looking for PROJ include files in: ${PROJ_INCLUDE_DIR}")

include_directories(${PROJ_INCLUDE_DIR})

endif()

list(PREPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR})