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they must be equivalent to the C type char** and null-terminated.  Not
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they must be equivalent to the C type char** and null-terminated.  Not
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even the MinGW g77 Fortran used null-terminated strings. (g77 was in
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even the MinGW g77 Fortran used null-terminated strings. (g77 was in
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GCC 3.x.y, superseded by gfortran.)
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GCC 3.x.y, superseded by gfortran.)
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WARNING: DLLs made with some compilers reset the FPU in their startup
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WARNING: DLLs made with some compilers reset the FPU in their startup
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code (Delphi has been one), and this will cause operations such as
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code and this will cause operations such as
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0./0. to crash R.  You can re-set the FPU to the correct values by a
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0./0. to crash R.  You can re-set the FPU to the correct values by a
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call to the C entry point Rwin_fpset().
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call to the C entry point Rwin_fpset().
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For some further details and Delphi examples see
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http://www.stats.uwo.ca/faculty/murdoch/software/compilingDLLs/
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