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try linking against the cblas library before blas #75

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try linking against the cblas library before blas #75

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10 changes: 8 additions & 2 deletions src/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -193,16 +193,22 @@ if(APPLE)
elseif(TRANSCRIBE_USE_SYSTEM_BLAS)
# BLA_VENDOR can be set by the user to prefer a specific BLAS
# (e.g. -DBLA_VENDOR=OpenBLAS). find_package probes the system.
find_package(CBLAS QUIET)
find_package(BLAS QUIET)
if(BLAS_FOUND)
if(CBLAS_FOUND OR BLAS_FOUND)
# find_package(BLAS) may find a Fortran-only BLAS (e.g. libblas3
# on Debian/Ubuntu) that lacks the cblas C wrappers. Verify that
# cblas.h exists before enabling; otherwise the build compiles
# cblas_sgemv calls but the linker can't resolve them.
include(CheckIncludeFile)
check_include_file(cblas.h HAVE_CBLAS_H)
if(HAVE_CBLAS_H)
target_link_libraries(transcribe PRIVATE ${BLAS_LIBRARIES})
if(CBLAS_FOUND)
target_link_libraries(transcribe PRIVATE ${CBLAS_LIBRARIES})
elseif(BLAS_FOUND)
target_link_libraries(transcribe PRIVATE ${BLAS_LIBRARIES})
endif()

target_compile_definitions(transcribe PRIVATE TRANSCRIBE_HAS_BLAS=1)
message(STATUS "transcribe: BLAS found — decoder will use cblas_sgemv")
else()
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