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93 lines
2.8 KiB
CMake
93 lines
2.8 KiB
CMake
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# - Find UDUNITS2
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# Find the native UDUNITS2 includes and library
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#
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# UDUNITS2_INCLUDES - where to find udunits2.h
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# UDUNITS2_LIBRARIES - libraries to link with
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# UDUNITS2_FOUND - True if UDUNITS2 was found.
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message(STATUS "UDUNITS2_ROOT = ${UDUNITS2_ROOT}")
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if (UDUNITS2_INCLUDES)
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# Already in cache, be silent
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set (UDUNITS2_FIND_QUIETLY TRUE)
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endif (UDUNITS2_INCLUDES)
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find_path (UDUNITS2_INCLUDES udunits2.h
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HINTS "${UDUNITS2_ROOT}/include" "$ENV{UDUNITS2_ROOT}/include"
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PATH_SUFFIXES "udunits2"
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DOC "Path to udunits2.h")
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# UDUNITS2 headers might be in .../include or .../include/udunits2.
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# We try both.
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if (${UDUNITS2_INCLUDES} MATCHES "udunits2/?$")
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string(REGEX REPLACE "/include/udunits2/?$" "/lib"
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UDUNITS2_LIB_HINT ${UDUNITS2_INCLUDES})
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else()
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string(REGEX REPLACE "/include/?$" "/lib"
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UDUNITS2_LIB_HINT ${UDUNITS2_INCLUDES})
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endif()
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find_library (UDUNITS2_LIBRARIES
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NAMES udunits2
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HINTS ${UDUNITS2_LIB_HINT})
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set(UDUNITS2_TEST_SRC "
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#include <udunits2.h>
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int main(int argc, char **argv) {
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ut_system *s = ut_read_xml(NULL);
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ut_free_system(s);
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return 0;
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}
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")
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if ((NOT UDUNITS2_LIBRARIES) OR (NOT UDUNITS2_INCLUDES))
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message(STATUS "Trying to find UDUNITS-2 using LD_LIBRARY_PATH (we're desperate)...")
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file(TO_CMAKE_PATH "$ENV{LD_LIBRARY_PATH}" LD_LIBRARY_PATH)
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find_library(UDUNITS2_LIBRARIES
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NAMES udunits2
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HINTS ${LD_LIBRARY_PATH})
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if (UDUNITS2_LIBRARIES)
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get_filename_component(UDUNITS2_LIB_DIR ${UDUNITS2_LIBRARIES} PATH)
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string(REGEX REPLACE "/lib/?$" "/include"
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UDUNITS2_H_HINT ${UDUNITS2_LIB_DIR})
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find_path (UDUNITS2_INCLUDES udunits2.h
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HINTS ${UDUNITS2_H_HINT}
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PATH_SUFFIXES "udunits2"
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DOC "Path to udunits2.h")
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endif()
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endif()
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include (CheckCSourceRuns)
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set(CMAKE_REQUIRED_INCLUDES ${UDUNITS2_INCLUDES})
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set(CMAKE_REQUIRED_LIBRARIES ${UDUNITS2_LIBRARIES})
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check_c_source_runs("${UDUNITS2_TEST_SRC}" UDUNITS2_WORKS_WITHOUT_EXPAT)
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if(${UDUNITS2_WORKS_WITHOUT_EXPAT})
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#message(STATUS "UDUNITS-2 does not require expat")
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else()
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find_package(EXPAT REQUIRED)
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set(CMAKE_REQUIRED_INCLUDES ${UDUNITS2_INCLUDES} ${EXPAT_INCLUDE_DIRS})
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set(CMAKE_REQUIRED_LIBRARIES ${UDUNITS2_LIBRARIES} ${EXPAT_LIBRARIES})
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check_c_source_runs("${UDUNITS2_TEST_SRC}" UDUNITS2_WORKS_WITH_EXPAT)
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if(NOT ${UDUNITS2_WORKS_WITH_EXPAT})
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message(FATAL_ERROR "UDUNITS-2 does not seem to work with or without expat")
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endif()
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#message(STATUS "UDUNITS-2 requires EXPAT")
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set (UDUNITS2_LIBRARIES "${UDUNITS2_LIBRARIES};${EXPAT_LIBRARIES}" CACHE STRING "" FORCE)
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endif()
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# handle the QUIETLY and REQUIRED arguments and set UDUNITS2_FOUND to TRUE if
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# all listed variables are TRUE
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include (FindPackageHandleStandardArgs)
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find_package_handle_standard_args (UDUNITS2 DEFAULT_MSG UDUNITS2_LIBRARIES UDUNITS2_INCLUDES)
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mark_as_advanced (UDUNITS2_LIBRARIES UDUNITS2_INCLUDES)
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