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| author | Hubertus van Dam <hvandam@bnl.gov> | 2018-08-28 11:02:58 -0700 |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2018-08-30 10:51:20 -0400 |
| commit | 5b8f69ebe9e82feb8bcd7dade76bb7fa88c8051b (patch) | |
| tree | a9fc009811592cfc74c84799d66809221dd49fd5 /Modules/FindBLAS.cmake | |
| parent | 2c807b75f3283d30ecde55be5b434be65d0ea141 (diff) | |
| download | cmake-5b8f69ebe9e82feb8bcd7dade76bb7fa88c8051b.tar.gz | |
FindBLAS: Detect implicitly linked BLAS library
Run the Check_Fortran_Libraries macro with an *empty* list of libraries
to detect whether the compiler implicitly links BLAS. If this works,
set `BLAS_LIBRARIES` to a placeholder value to get through the rest of
our logic. At the end replace the placeholder by a real empty string
again to report to callers.
Diffstat (limited to 'Modules/FindBLAS.cmake')
| -rw-r--r-- | Modules/FindBLAS.cmake | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/Modules/FindBLAS.cmake b/Modules/FindBLAS.cmake index 5ba7e4fb82..1a89068034 100644 --- a/Modules/FindBLAS.cmake +++ b/Modules/FindBLAS.cmake @@ -22,7 +22,8 @@ # BLAS_LINKER_FLAGS - uncached list of required linker flags (excluding -l # and -L). # BLAS_LIBRARIES - uncached list of libraries (using full path name) to -# link against to use BLAS +# link against to use BLAS (may be empty if compiler implicitly links +# BLAS) # BLAS95_LIBRARIES - uncached list of libraries (using full path name) # to link against to use BLAS95 interface # BLAS95_FOUND - set to true if a library implementing the BLAS f95 interface @@ -163,7 +164,11 @@ macro(Check_Fortran_Libraries LIBRARIES _prefix _name _flags _list _thread) mark_as_advanced(${_prefix}${_combined_name}_WORKS) set(_libraries_work ${${_prefix}${_combined_name}_WORKS}) endif() - if(NOT _libraries_work) + if(_libraries_work) + if("${_list}" STREQUAL "") + set(${LIBRARIES} "${LIBRARIES}-PLACEHOLDER-FOR-EMPTY-LIBRARIES") + endif() + else() set(${LIBRARIES} FALSE) endif() #message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}") @@ -180,6 +185,20 @@ else () endif() endif () +if (BLA_VENDOR STREQUAL "All") + if(NOT BLAS_LIBRARIES) + # Implicitly linked BLAS libraries + check_fortran_libraries( + BLAS_LIBRARIES + BLAS + sgemm + "" + "" + "" + ) + endif() +endif () + if (BLA_VENDOR STREQUAL "Goto" OR BLA_VENDOR STREQUAL "All") if(NOT BLAS_LIBRARIES) # gotoblas (http://www.tacc.utexas.edu/tacc-projects/gotoblas2) @@ -500,6 +519,7 @@ if (BLA_VENDOR STREQUAL "NAS" OR BLA_VENDOR STREQUAL "All") ) endif () endif () + # Generic BLAS library? if (BLA_VENDOR STREQUAL "Generic" OR BLA_VENDOR STREQUAL "All") if(NOT BLAS_LIBRARIES) @@ -702,5 +722,11 @@ else() find_package_handle_standard_args(BLAS REQUIRED_VARS BLAS_LIBRARIES) endif() +# On compilers that implicitly link BLAS (such as ftn, cc, and CC on Cray HPC machines) +# we used a placeholder for empty BLAS_LIBRARIES to get through our logic above. +if (BLAS_LIBRARIES STREQUAL "BLAS_LIBRARIES-PLACEHOLDER-FOR-EMPTY-LIBRARIES") + set(BLAS_LIBRARIES "") +endif() + cmake_pop_check_state() set(CMAKE_FIND_LIBRARY_SUFFIXES ${_blas_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES}) |