> On Sat, Nov 23, 2002 at 08:01:10PM -0800, Jason R Thorpe wrote:
> 
>  >  > /usr/lib/libstdc++.so: warning: reference to compatibility vfork(); include <unistd.h> for correct reference
>  > 
>  > Well, it tells you precisely what needs to happen -- <unistd.h> needs to
>  > be included by the source file using vfork().
>  > 
>  > This warning does not happen on a -current system, but the toolchain has
>  > not changed... and I don't see a reference to vfork in the libstdc++ sources,
>  > however it is there in the object... hm.
> 
> Ah, it was right under my nose:
> 
> ./libio/iopopen.c:#define _IO_fork vfork /* defined in libiberty, if needed */
> 
> -current does indeed include <unistd.h> to get the correct vfork reference,
> ...and apparently the netbsd-1-6 branch does, as well:

Well, I just re-built 1-6 and still get the warning.  Appears to be a 
bit of a gap between the theory and reality :-/

The declaration (<unistd.h>) looks to be wrapped in the (false) expression:

    228  #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || \
    229      (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) 
|| \
    230      (_XOPEN_SOURCE - 0) >= 500

Poking around with:

# /home/tmp/TOOLDIR/bin/powerpc--netbsd-gcc -O2   -Werror  -nostdinc++ 
-I/usr/src/gnu/lib/libstdc++/arch/powerpc 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/libio 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/libstdc++ 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/libstdc++/stl 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/libstdc++/../libio 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/gcc/cp/inc 
-I/usr/src/gnu/lib/libstdc++/../libiberty 
-I/usr/src/gnu/lib/libstdc++/../../dist/toolchain/include -nostdinc 
-isystem /home/tmp/DESTDIR/usr/include  -c -fPIC -DPIC 
/usr/src/gnu/lib/libstdc++/../../dist/toolchain/libio/iopopen.c -E -dD

Indicates:

extern _G_pid_t  vfork   (void)  ;
   ((_IO_proc_file *) fp)->pid = child_pid = vfork  ();

(that's the declaration found in iopopen.c) and only

#define _POSIX_C_SOURCE 1L

is defined.

Andrew



> symbolic names:
>         netbsd-1-6-RELEASE: 1.2
>         netbsd-1-6-RC3: 1.2
>         netbsd-1-6-RC2: 1.2
>         netbsd-1-6-RC1: 1.2
>         netbsd-1-6: 1.2.0.2
>         netbsd-1-6-base: 1.2
>         gcc-2-95-3: 1.1.1.1
>         gcc-2-95-2: 1.1.1.1
>         FSF: 1.1.1
> keyword substitution: o
> total revisions: 3;     selected revisions: 3
> description: