Re: signbit(), C++, and Solaris 10

[Paul Eggert]

On 2024-11-21 19:01, G. Branden Robinson wrote:
> Inspecting src/devices/grodvi/dvi.cpp, I saw that it had:
>
> #ifdef HAVE_CONFIG_H
> #include <config.h>
> #endif
>
> ...but further checking revealed that src/include/driver.h did not.
>
> However, adding it didn't solve the problem.

You shouldn't need to put "#include <config.h>" at the start of every 
source file. It needs to be included first at the start of every 
compilation unit; that's good enough.

I see that some Groff .h files include config.h:

src/roff/troff/hvunits.h:20:#include <config.h>
src/preproc/pic/pic.h:22:#include <config.h>
src/include/lib.h:23:#include <config.h>
src/include/ptable.h:20:#include <config.h>
src/include/itable.h:20:#include <config.h>
src/include/stringclass.h:20:#include <config.h>

Not sure why Groff does that. The .cpp or .c file should include 
config.h first, and .h files should therefore not need to include config.h.

This isn't your main problem, though. It's something to do with Gnulib 
and signbit. What C compiler are you using? What commmand do you use to 
configure Groff? (You may need a C++ expert like Bruno to help out here....)