[Mingw-users] gcc/gfortran 4.7.2 - Unresolved External Symbols: _lroundf and ___chkstk_ms

[Paul O. <pa...@gm...>]

I am working on Win32 a project that is a mix of C++, C and Fortran.
The C and C++ is compiled using Visual C++ 2008 and the Fortran is
compiled with an ancient version of Absoft Fortran (version 4.5). The
project's DLLs and executable are linked using the Visual Studio 2008
linker.

I am looking into the feasibility of replacing the Absoft Fortran
compiler with gfortran. I installed MinGW in the default location
using mingw-get-inst-20120426.exe and getting the latest repository
catalogues (I reinstalled 21 FEB 2013 to make sure I was up to date.)

Using gendef and the Visual Studio lib tool I created an interface
library for libgfortran-3.dll.

I started with one of my utility DLLs and successfully compiled all
the Fortran using gfortran but at link time I am getting two
unresolved external references:

   sdely.obj : error LNK2019: unresolved external symbol _lroundf
referenced in function _sdely
   sfmove.obj : error LNK2019: unresolved external symbol ___chkstk_ms
referenced in function _sfmove

sdely () calls the Fortran intrinsic procedure NINT (). I understand
that calls to such rounding functions resolve to gcc library
functions, but _lroundf doesn't seem to be exported from any of the
MinGW DLLs.

I also searched the MinGW provided DLLs and objects and could not find
___chkstk_ms either.

Can I link gfortran objects into a Visual C++ linked DLL?  What do I
need to do to resolve these references?

Thanks,

Paul