trick/CMakeModules/FindUDUNITS2.cmake
Alex Lin ce0cdc9636
Cmake merge ()
* Merging changes from cmake branch to master

* Fixing includes for renamed header files

* still need build rule

* Adding warning for swig code for gcc8+

* Adding CMakeLists.txt for data products

* Cmake merge 

Making adjustments to get cmake working on the Mac (Mojave)

* Cmake merge 

Changing string append to list append
2019-11-19 09:01:16 -06:00

93 lines
2.8 KiB
CMake

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