refactoring

blas.cmake
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			set(_default_blas $ENV{BLA_VENDOR})
			if(NOT _default_blas)
			set(_default_blas All)
			endif()
			set(BSPLINES_USE_BLAS_VENDOR "${_default_blas}" CACHE STRING "Version of blas to use")
			mark_as_advanced(BSPLINES_USE_BLAS_VENDOR)
			set_property(CACHE BSPLINES_USE_BLAS_VENDOR PROPERTY STRINGS
			All
			ACML
			ACML_GPU
			ACML_MP
			ATLAS
			Apple
			CXML
			DXML
			Generic
			Goto
			IBMESSL
			Intel
			Intel10_32
			Intel10_64lp
			Intel10_64lp_seq
			NAS
			OpenBLAS
			PhiPACK
			SCSL
			SGIMATH
			SunPerf
			)

			if(BSPLINES_USE_PARDISO)
			set(BSPLINES_USE_BLAS_VENDOR Intel10_64lp CACHE STRING "" INTERNAL)
			endif()

			set(ENV{BLA_VENDOR} ${BSPLINES_USE_BLAS_VENDOR})
			set(BLA_VENDOR ${BSPLINES_USE_BLAS_VENDOR})

			if (BSPLINES_USE_LAPACK)
			if (BSPLINES_USE_BLAS_VENDOR MATCHES "Intel.*")
			set(BLA_STATIC ON)
			endif()
			endif()

			find_package(BLAS REQUIRED)

			set(CRAY FALSE)
			# this is a bit hacky
			if(CMAKE_SYSTEM_NAME STREQUAL "CrayLinuxEnvironment" OR __craylinux_crayprgenv)
			set(CRAY TRUE)
			endif()

			if(BSPLINES_USE_LAPACK AND NOT CRAY)
			find_package(LAPACK REQUIRED)
			endif()