diff options
Diffstat (limited to 'FindLTDL.cmake')
| -rw-r--r-- | FindLTDL.cmake | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/FindLTDL.cmake b/FindLTDL.cmake new file mode 100644 index 0000000..55e29df --- /dev/null +++ b/FindLTDL.cmake @@ -0,0 +1,97 @@ +# - Find ltdl header and library +# + +# This module defines +# LTDL_FOUND, if false, do not try to use LTDL. +# LTDL_INCLUDE_DIR, where to find ltdl.h. +# LTDL_LIBRARIES, the libraries to link against to use libltdl. +# LTDL_LIBRARY_DIR, the directory where libltdl is found. + +find_path(LTDL_INCLUDE_DIR ltdl.h /usr/local/include /usr/include) + +if(LTDL_INCLUDE_DIR) + find_library(LTDL_LIBRARIES + NAMES ltdl + PATHS /usr/local/lib /usr/lib + ) + if(LTDL_LIBRARIES) + + set(LTDL_LIBRARY_DIR "") + get_filename_component(LTDL_LIBRARY_DIR ${LTDL_LIBRARIES} PATH) + + # Define useful internal macro for finding and checking a library + include(CheckLibraryExists) + macro(_find_check_libs _library_name _function_name _lib _have_lib) + find_library( + ${_lib} + NAMES ${_library_name} + PATHS /usr/local/lib /usr/lib + ) +# message("_library_name = ${_library_name}") +# message("${_lib} = ${${_lib}}") + if(${_lib}) + get_filename_component(_path ${${_lib}} PATH) + check_library_exists( + ${_library_name} + ${_function_name} + ${_path} + ${_have_lib} + ) + endif(${_lib}) + endmacro(_find_check_libs) + + # Find and check platform-dependent libraries which + # libltdl depends upon using model given + # for determining LIBADD_DL in $prefix/share/libtool/libltdl/acinclude.m4 + + # Look for three exclusive alternatives: + # (dld shl_load; dl dlopen; svdl dlopen) + # N.B. all the different ADDLIB variables have to be different because + # of caching of results in the macro. + _find_check_libs(dld shl_load LTDL_LTDL_ADDLIB0 LTDL_LTDL_HAVE_ADDLIB0) + if(LTDL_LTDL_HAVE_ADDLIB0) + set(LTDL_LIBRARIES ${LTDL_LIBRARIES} ${LTDL_LTDL_ADDLIB0}) + set(LTDL_FOUND ON) + else(LTDL_LTDL_HAVE_ADDLIB0) + _find_check_libs(dl dlopen LTDL_LTDL_ADDLIB1 LTDL_LTDL_HAVE_ADDLIB1) + if(LTDL_LTDL_HAVE_ADDLIB1) + set(LTDL_LIBRARIES ${LTDL_LIBRARIES} ${LTDL_LTDL_ADDLIB1}) + set(LTDL_FOUND ON) + else(LTDL_LTDL_HAVE_ADDLIB1) + _find_check_libs(svdl dlopen LTDL_LTDL_ADDLIB2 LTDL_LTDL_HAVE_ADDLIB2) + if(LTDL_LTDL_HAVE_ADDLIB2) + set(LTDL_LIBRARIES ${LTDL_LIBRARIES} ${LTDL_LTDL_ADDLIB2}) + set(LTDL_FOUND ON) + else(LTDL_LTDL_HAVE_ADDLIB2) + set(LTDL_FOUND OFF) + endif(LTDL_LTDL_HAVE_ADDLIB2) + endif(LTDL_LTDL_HAVE_ADDLIB1) + endif(LTDL_LTDL_HAVE_ADDLIB0) + + # (dld dld_link) appended to any that have been found before. + _find_check_libs(dld dld_link LTDL_LTDL_ADDLIB3 LTDL_LTDL_HAVE_ADDLIB3) + if(LTDL_LTDL_HAVE_ADDLIB3) + set(LTDL_LIBRARIES ${LTDL_LIBRARIES} ${LTDL_LTDL_ADDLIB3}) + set(LTDL_FOUND ON) + endif(LTDL_LTDL_HAVE_ADDLIB3) + + endif(LTDL_LIBRARIES) +endif(LTDL_INCLUDE_DIR) + +if(LTDL_FOUND) + if(NOT LTDL_FIND_QUIETLY) + message(STATUS "Found LTDL: ${LTDL_LIBRARIES}") + endif(NOT LTDL_FIND_QUIETLY) +else(LTDL_FOUND) + if(LTDL_FIND_REQUIRED) + message(FATAL_ERROR "Could not find LTDL library") + endif(LTDL_FIND_REQUIRED) +endif(LTDL_FOUND) + +mark_as_advanced( +LTDL_LTDL_ADDLIB0 LTDL_LTDL_HAVE_ADDLIB0 +LTDL_LTDL_ADDLIB1 LTDL_LTDL_HAVE_ADDLIB1 +LTDL_LTDL_ADDLIB2 LTDL_LTDL_HAVE_ADDLIB2 +LTDL_LTDL_ADDLIB3 LTDL_LTDL_HAVE_ADDLIB3 +) + |