source: pacpussensors/trunk/Vislab/lib3dv/eigen/cmake/FindBLAS.cmake@ 139

Last change on this file since 139 was 136, checked in by ldecherf, 8 years ago

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1# Find BLAS library
2#
3# This module finds an installed library that implements the BLAS
4# linear-algebra interface (see http://www.netlib.org/blas/).
5# The list of libraries searched for is mainly taken
6# from the autoconf macro file, acx_blas.m4 (distributed at
7# http://ac-archive.sourceforge.net/ac-archive/acx_blas.html).
8#
9# This module sets the following variables:
10# BLAS_FOUND - set to true if a library implementing the BLAS interface
11# is found
12# BLAS_INCLUDE_DIR - Directories containing the BLAS header files
13# BLAS_DEFINITIONS - Compilation options to use BLAS
14# BLAS_LINKER_FLAGS - Linker flags to use BLAS (excluding -l
15# and -L).
16# BLAS_LIBRARIES_DIR - Directories containing the BLAS libraries.
17# May be null if BLAS_LIBRARIES contains libraries name using full path.
18# BLAS_LIBRARIES - List of libraries to link against BLAS interface.
19# May be null if the compiler supports auto-link (e.g. VC++).
20# BLAS_USE_FILE - The name of the cmake module to include to compile
21# applications or libraries using BLAS.
22#
23# This module was modified by CGAL team:
24# - find libraries for a C++ compiler, instead of Fortran
25# - added BLAS_INCLUDE_DIR, BLAS_DEFINITIONS and BLAS_LIBRARIES_DIR
26# - removed BLAS95_LIBRARIES
27
28include(CheckFunctionExists)
29
30
31# This macro checks for the existence of the combination of fortran libraries
32# given by _list. If the combination is found, this macro checks (using the
33# check_function_exists macro) whether can link against that library
34# combination using the name of a routine given by _name using the linker
35# flags given by _flags. If the combination of libraries is found and passes
36# the link test, LIBRARIES is set to the list of complete library paths that
37# have been found and DEFINITIONS to the required definitions.
38# Otherwise, LIBRARIES is set to FALSE.
39# N.B. _prefix is the prefix applied to the names of all cached variables that
40# are generated internally and marked advanced by this macro.
41macro(check_fortran_libraries DEFINITIONS LIBRARIES _prefix _name _flags _list _path)
42 #message("DEBUG: check_fortran_libraries(${_list} in ${_path})")
43
44 # Check for the existence of the libraries given by _list
45 set(_libraries_found TRUE)
46 set(_libraries_work FALSE)
47 set(${DEFINITIONS} "")
48 set(${LIBRARIES} "")
49 set(_combined_name)
50 foreach(_library ${_list})
51 set(_combined_name ${_combined_name}_${_library})
52
53 if(_libraries_found)
54 # search first in ${_path}
55 find_library(${_prefix}_${_library}_LIBRARY
56 NAMES ${_library}
57 PATHS ${_path} NO_DEFAULT_PATH
58 )
59 # if not found, search in environment variables and system
60 if ( WIN32 )
61 find_library(${_prefix}_${_library}_LIBRARY
62 NAMES ${_library}
63 PATHS ENV LIB
64 )
65 elseif ( APPLE )
66 find_library(${_prefix}_${_library}_LIBRARY
67 NAMES ${_library}
68 PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 ENV DYLD_LIBRARY_PATH
69 )
70 else ()
71 find_library(${_prefix}_${_library}_LIBRARY
72 NAMES ${_library}
73 PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 ENV LD_LIBRARY_PATH
74 )
75 endif()
76 mark_as_advanced(${_prefix}_${_library}_LIBRARY)
77 set(${LIBRARIES} ${${LIBRARIES}} ${${_prefix}_${_library}_LIBRARY})
78 set(_libraries_found ${${_prefix}_${_library}_LIBRARY})
79 endif(_libraries_found)
80 endforeach(_library ${_list})
81 if(_libraries_found)
82 set(_libraries_found ${${LIBRARIES}})
83 endif()
84
85 # Test this combination of libraries with the Fortran/f2c interface.
86 # We test the Fortran interface first as it is well standardized.
87 if(_libraries_found AND NOT _libraries_work)
88 set(${DEFINITIONS} "-D${_prefix}_USE_F2C")
89 set(${LIBRARIES} ${_libraries_found})
90 # Some C++ linkers require the f2c library to link with Fortran libraries.
91 # I do not know which ones, thus I just add the f2c library if it is available.
92 find_package( F2C QUIET )
93 if ( F2C_FOUND )
94 set(${DEFINITIONS} ${${DEFINITIONS}} ${F2C_DEFINITIONS})
95 set(${LIBRARIES} ${${LIBRARIES}} ${F2C_LIBRARIES})
96 endif()
97 set(CMAKE_REQUIRED_DEFINITIONS ${${DEFINITIONS}})
98 set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}})
99 #message("DEBUG: CMAKE_REQUIRED_DEFINITIONS = ${CMAKE_REQUIRED_DEFINITIONS}")
100 #message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}")
101 # Check if function exists with f2c calling convention (ie a trailing underscore)
102 check_function_exists(${_name}_ ${_prefix}_${_name}_${_combined_name}_f2c_WORKS)
103 set(CMAKE_REQUIRED_DEFINITIONS} "")
104 set(CMAKE_REQUIRED_LIBRARIES "")
105 mark_as_advanced(${_prefix}_${_name}_${_combined_name}_f2c_WORKS)
106 set(_libraries_work ${${_prefix}_${_name}_${_combined_name}_f2c_WORKS})
107 endif(_libraries_found AND NOT _libraries_work)
108
109 # If not found, test this combination of libraries with a C interface.
110 # A few implementations (ie ACML) provide a C interface. Unfortunately, there is no standard.
111 if(_libraries_found AND NOT _libraries_work)
112 set(${DEFINITIONS} "")
113 set(${LIBRARIES} ${_libraries_found})
114 set(CMAKE_REQUIRED_DEFINITIONS "")
115 set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}})
116 #message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}")
117 check_function_exists(${_name} ${_prefix}_${_name}${_combined_name}_WORKS)
118 set(CMAKE_REQUIRED_LIBRARIES "")
119 mark_as_advanced(${_prefix}_${_name}${_combined_name}_WORKS)
120 set(_libraries_work ${${_prefix}_${_name}${_combined_name}_WORKS})
121 endif(_libraries_found AND NOT _libraries_work)
122
123 # on failure
124 if(NOT _libraries_work)
125 set(${DEFINITIONS} "")
126 set(${LIBRARIES} FALSE)
127 endif()
128 #message("DEBUG: ${DEFINITIONS} = ${${DEFINITIONS}}")
129 #message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}")
130endmacro(check_fortran_libraries)
131
132
133#
134# main
135#
136
137# Is it already configured?
138if (BLAS_LIBRARIES_DIR OR BLAS_LIBRARIES)
139
140 set(BLAS_FOUND TRUE)
141
142else()
143
144 # reset variables
145 set( BLAS_INCLUDE_DIR "" )
146 set( BLAS_DEFINITIONS "" )
147 set( BLAS_LINKER_FLAGS "" )
148 set( BLAS_LIBRARIES "" )
149 set( BLAS_LIBRARIES_DIR "" )
150
151 #
152 # If Unix, search for BLAS function in possible libraries
153 #
154
155 # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
156 if(NOT BLAS_LIBRARIES)
157 check_fortran_libraries(
158 BLAS_DEFINITIONS
159 BLAS_LIBRARIES
160 BLAS
161 sgemm
162 ""
163 "cblas;f77blas;atlas"
164 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
165 )
166 endif()
167
168 # BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
169 if(NOT BLAS_LIBRARIES)
170 check_fortran_libraries(
171 BLAS_DEFINITIONS
172 BLAS_LIBRARIES
173 BLAS
174 sgemm
175 ""
176 "sgemm;dgemm;blas"
177 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
178 )
179 endif()
180
181 # BLAS in Alpha CXML library?
182 if(NOT BLAS_LIBRARIES)
183 check_fortran_libraries(
184 BLAS_DEFINITIONS
185 BLAS_LIBRARIES
186 BLAS
187 sgemm
188 ""
189 "cxml"
190 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
191 )
192 endif()
193
194 # BLAS in Alpha DXML library? (now called CXML, see above)
195 if(NOT BLAS_LIBRARIES)
196 check_fortran_libraries(
197 BLAS_DEFINITIONS
198 BLAS_LIBRARIES
199 BLAS
200 sgemm
201 ""
202 "dxml"
203 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
204 )
205 endif()
206
207 # BLAS in Sun Performance library?
208 if(NOT BLAS_LIBRARIES)
209 check_fortran_libraries(
210 BLAS_DEFINITIONS
211 BLAS_LIBRARIES
212 BLAS
213 sgemm
214 "-xlic_lib=sunperf"
215 "sunperf;sunmath"
216 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
217 )
218 if(BLAS_LIBRARIES)
219 # Extra linker flag
220 set(BLAS_LINKER_FLAGS "-xlic_lib=sunperf")
221 endif()
222 endif()
223
224 # BLAS in SCSL library? (SGI/Cray Scientific Library)
225 if(NOT BLAS_LIBRARIES)
226 check_fortran_libraries(
227 BLAS_DEFINITIONS
228 BLAS_LIBRARIES
229 BLAS
230 sgemm
231 ""
232 "scsl"
233 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
234 )
235 endif()
236
237 # BLAS in SGIMATH library?
238 if(NOT BLAS_LIBRARIES)
239 check_fortran_libraries(
240 BLAS_DEFINITIONS
241 BLAS_LIBRARIES
242 BLAS
243 sgemm
244 ""
245 "complib.sgimath"
246 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
247 )
248 endif()
249
250 # BLAS in IBM ESSL library? (requires generic BLAS lib, too)
251 if(NOT BLAS_LIBRARIES)
252 check_fortran_libraries(
253 BLAS_DEFINITIONS
254 BLAS_LIBRARIES
255 BLAS
256 sgemm
257 ""
258 "essl;blas"
259 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
260 )
261 endif()
262
263 #BLAS in intel mkl 10 library? (em64t 64bit)
264 if(NOT BLAS_LIBRARIES)
265 check_fortran_libraries(
266 BLAS_DEFINITIONS
267 BLAS_LIBRARIES
268 BLAS
269 sgemm
270 ""
271 "mkl_intel_lp64;mkl_intel_thread;mkl_core;guide;pthread"
272 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
273 )
274 endif()
275
276 ### windows version of intel mkl 10?
277 if(NOT BLAS_LIBRARIES)
278 check_fortran_libraries(
279 BLAS_DEFINITIONS
280 BLAS_LIBRARIES
281 BLAS
282 SGEMM
283 ""
284 "mkl_c_dll;mkl_intel_thread_dll;mkl_core_dll;libguide40"
285 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
286 )
287 endif()
288
289 #older versions of intel mkl libs
290
291 # BLAS in intel mkl library? (shared)
292 if(NOT BLAS_LIBRARIES)
293 check_fortran_libraries(
294 BLAS_DEFINITIONS
295 BLAS_LIBRARIES
296 BLAS
297 sgemm
298 ""
299 "mkl;guide;pthread"
300 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
301 )
302 endif()
303
304 #BLAS in intel mkl library? (static, 32bit)
305 if(NOT BLAS_LIBRARIES)
306 check_fortran_libraries(
307 BLAS_DEFINITIONS
308 BLAS_LIBRARIES
309 BLAS
310 sgemm
311 ""
312 "mkl_ia32;guide;pthread"
313 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
314 )
315 endif()
316
317 #BLAS in intel mkl library? (static, em64t 64bit)
318 if(NOT BLAS_LIBRARIES)
319 check_fortran_libraries(
320 BLAS_DEFINITIONS
321 BLAS_LIBRARIES
322 BLAS
323 sgemm
324 ""
325 "mkl_em64t;guide;pthread"
326 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
327 )
328 endif()
329
330 #BLAS in acml library?
331 if(NOT BLAS_LIBRARIES)
332 check_fortran_libraries(
333 BLAS_DEFINITIONS
334 BLAS_LIBRARIES
335 BLAS
336 sgemm
337 ""
338 "acml"
339 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
340 )
341 endif()
342
343 # Apple BLAS library?
344 if(NOT BLAS_LIBRARIES)
345 check_fortran_libraries(
346 BLAS_DEFINITIONS
347 BLAS_LIBRARIES
348 BLAS
349 sgemm
350 ""
351 "Accelerate"
352 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
353 )
354 endif()
355
356 if ( NOT BLAS_LIBRARIES )
357 check_fortran_libraries(
358 BLAS_DEFINITIONS
359 BLAS_LIBRARIES
360 BLAS
361 sgemm
362 ""
363 "vecLib"
364 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
365 )
366 endif ( NOT BLAS_LIBRARIES )
367
368 # Generic BLAS library?
369 # This configuration *must* be the last try as this library is notably slow.
370 if ( NOT BLAS_LIBRARIES )
371 check_fortran_libraries(
372 BLAS_DEFINITIONS
373 BLAS_LIBRARIES
374 BLAS
375 sgemm
376 ""
377 "blas"
378 "${CGAL_TAUCS_LIBRARIES_DIR} ENV BLAS_LIB_DIR"
379 )
380 endif()
381
382 if(BLAS_LIBRARIES_DIR OR BLAS_LIBRARIES)
383 set(BLAS_FOUND TRUE)
384 else()
385 set(BLAS_FOUND FALSE)
386 endif()
387
388 if(NOT BLAS_FIND_QUIETLY)
389 if(BLAS_FOUND)
390 message(STATUS "A library with BLAS API found.")
391 else(BLAS_FOUND)
392 if(BLAS_FIND_REQUIRED)
393 message(FATAL_ERROR "A required library with BLAS API not found. Please specify library location.")
394 else()
395 message(STATUS "A library with BLAS API not found. Please specify library location.")
396 endif()
397 endif(BLAS_FOUND)
398 endif(NOT BLAS_FIND_QUIETLY)
399
400 # Add variables to cache
401 set( BLAS_INCLUDE_DIR "${BLAS_INCLUDE_DIR}"
402 CACHE PATH "Directories containing the BLAS header files" FORCE )
403 set( BLAS_DEFINITIONS "${BLAS_DEFINITIONS}"
404 CACHE STRING "Compilation options to use BLAS" FORCE )
405 set( BLAS_LINKER_FLAGS "${BLAS_LINKER_FLAGS}"
406 CACHE STRING "Linker flags to use BLAS" FORCE )
407 set( BLAS_LIBRARIES "${BLAS_LIBRARIES}"
408 CACHE FILEPATH "BLAS libraries name" FORCE )
409 set( BLAS_LIBRARIES_DIR "${BLAS_LIBRARIES_DIR}"
410 CACHE PATH "Directories containing the BLAS libraries" FORCE )
411
412 #message("DEBUG: BLAS_INCLUDE_DIR = ${BLAS_INCLUDE_DIR}")
413 #message("DEBUG: BLAS_DEFINITIONS = ${BLAS_DEFINITIONS}")
414 #message("DEBUG: BLAS_LINKER_FLAGS = ${BLAS_LINKER_FLAGS}")
415 #message("DEBUG: BLAS_LIBRARIES = ${BLAS_LIBRARIES}")
416 #message("DEBUG: BLAS_LIBRARIES_DIR = ${BLAS_LIBRARIES_DIR}")
417 #message("DEBUG: BLAS_FOUND = ${BLAS_FOUND}")
418
419endif(BLAS_LIBRARIES_DIR OR BLAS_LIBRARIES)
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