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PR fortran/26025 * lang.opt: Add -fexternal-blas and -fblas-matmul-limit options. * options.c (gfc_init_options): Initialize new flags. (gfc_handle_option): Handle new flags. * gfortran.h (gfc_option): Add flag_external_blas and blas_matmul_limit flags. * trans-expr.c (gfc_conv_function_call): Use new argument append_args, appending it at the end of the argument list built for a function call. * trans-stmt.c (gfc_trans_call): Use NULL_TREE for the new append_args argument to gfc_trans_call. * trans.h (gfc_conv_function_call): Update prototype. * trans-decl.c (gfc_build_intrinsic_function_decls): Add prototypes for BLAS ?gemm routines. * trans-intrinsic.c (gfc_conv_intrinsic_funcall): Generate the extra arguments given to the library matmul function, and give them to gfc_conv_function_call. * invoke.texi: Add documentation for -fexternal-blas and -fblas-matmul-limit. * m4/matmul.m4: Add possible call to gemm routine. * generated/matmul_r8.c: Regenerate. * generated/matmul_r16.c: Regenerate. * generated/matmul_c8.c: Regenerate. * generated/matmul_i8.c: Regenerate. * generated/matmul_c16.c: Regenerate. * generated/matmul_r10.c: Regenerate. * generated/matmul_r4.c: Regenerate. * generated/matmul_c10.c: Regenerate. * generated/matmul_c4.c: Regenerate. * generated/matmul_i4.c: Regenerate. * generated/matmul_i16.c: Regenerate. From-SVN: r117948
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