> A few weeks ago, someone asked if Sun f95 had an option
> to append double trailing underscores to global names to
> create linker names instead of the single trailing underscores
> it normally uses. Sun f95 does not have such an option.
> My personal preference is not to provide such an option.
>
> The reason given for wanting the option was that the CDF
> library required it. Are there other libraries that require the
> use of double underscores?
>
> Bob Corbett

>
> The following should be considered as a data point:
>
> I support an open source I/O library that provides high level
> data access for environmental modeling. It uses various other
> libraries -- particularly netCDF and PVM -- as lower layers
> for its data storage/communication.
>
> The *single*largest* support issue is related to the fact
> that Linux-distributor-built libraries (particularly netCDF)
> have been built for "g77"-style name mangling, but my users
> are trying to use them with other (single-underscore-style
> name-mangling) compilers. The users seem incapable of reading
> the part of the installation manual that says, "If you use
> [X] compiler, you *must* rebuild libnetcdf.a with that compiler."
>
> Fortunately, the netCDF "configure" system can be persuaded to do
> the Right Thing® if you build it yourself instead of using the
> vendor-supplied version. ...