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include(CheckLibraryExists)
string(TOUPPER ${PROJECT_NAME} _UPPER_PROJECT_NAME)
set(_PROJECT_DEPENDENCY_DIR ${_UPPER_PROJECT_NAME}_DEPENDENCY_DIR)
if (NOT LIBBZ_LIBRARY)
find_library(LIBBZ_LIBRARY
NAMES bzip2.lib bz2 libbz2.lib
PATHS /usr/lib /usr/local/lib
${CMAKE_OSX_SYSROOT}/usr/lib
${${_PROJECT_DEPENDENCY_DIR}}/lib
NO_DEFAULT_PATH
NO_CMAKE_ENVIRONMENT_PATH
NO_CMAKE_PATH
NO_SYSTEM_ENVIRONMENT_PATH
NO_CMAKE_SYSTEM_PATH
DOC "The file name of the bzip2 library."
)
endif()
if (NOT LIBBZ_LIBRARY)
find_library(LIBBZ_LIBRARY
NAMES bzip2.lib bz2 libbz2.lib
PATHS /usr/lib /usr/local/lib
${CMAKE_OSX_SYSROOT}/usr/lib
${${_PROJECT_DEPENDENCY_DIR}}/lib
DOC "The file name of the bzip2 library."
)
endif()
if (NOT LIBBZ_INCLUDE_DIR)
find_path(LIBBZ_INCLUDE_DIR
NAMES bzlib.h bzip2/bzlib.h
PATHS ${CMAKE_OSX_SYSROOT}/usr/include
/usr/include /usr/local/include
${${_PROJECT_DEPENDENCY_DIR}}/include
NO_DEFAULT_PATH
DOC "The directory containing the bzip2 include files."
)
endif()
if (NOT LIBBZ_INCLUDE_DIR)
find_path(LIBBZ_INCLUDE_DIR
NAMES bzlib.h bzip2/bzlib.h
PATHS ${CMAKE_OSX_SYSROOT}/usr/include
/usr/include /usr/local/include
${${_PROJECT_DEPENDENCY_DIR}}/include
DOC "The directory containing the bzip2 include files."
)
endif()
if (LIBBZ_LIBRARY)
# make sure that we have a valid bzip2 library
file(TO_CMAKE_PATH "${LIBBZ_LIBRARY}" LIBBZ2_CMAKE_PATH)
check_library_exists("${LIBBZ2_CMAKE_PATH}" "BZ2_bzCompressInit" "" LIBBZ_FOUND_SYMBOL)
if(NOT LIBBZ_FOUND_SYMBOL)
# this is odd, but on windows this check always fails! must be a
# bug in the current cmake version so for now only issue this
# warning on linux
if(UNIX)
message(WARNING
"The chosen bz2 library does not appear to be valid because it is
missing some required symbols. Please check that ${LIBBZ_LIBRARY}
is the bzip2 library. For details about the error, please see
${LIBSBML_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log")
endif()
endif()
if(NOT EXISTS "${LIBBZ_INCLUDE_DIR}/bzlib.h")
message(FATAL_ERROR
"The include directory specified for the bz2 library does not
appear to be valid. It should contain the file bzlib.h, but
it does not.")
endif()
endif()
if (LIBBZ_INCLUDE_DIR AND EXISTS "${LIBBZ_INCLUDE_DIR}/bzlib.h")
file(STRINGS "${LIBBZ_INCLUDE_DIR}/bzlib.h" BZLIB_H REGEX "bzip2/libbzip2 version [0-9]+\\.[^ ]+ of [0-9]+ ")
string(REGEX REPLACE ".* bzip2/libbzip2 version ([0-9]+\\.[^ ]+) of [0-9]+ .*" "\\1" LIBBZ_VERSION "${BZLIB_H}")
endif ()
if(NOT TARGET BZ2::BZ2)
add_library(BZ2::BZ2 UNKNOWN IMPORTED)
set_target_properties(BZ2::BZ2 PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION "${LIBBZ_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${LIBBZ_INCLUDE_DIR}")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
BZ2
VERSION_VAR LIBBZ_VERSION
REQUIRED_VARS LIBBZ_LIBRARY LIBBZ_INCLUDE_DIR
)
mark_as_advanced(LIBBZ_VERSION)
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