Re: strdup falsely detected when CFLAGS contains -ansi on MSYS/MinGW (gcc)

[Chris Pickett]

Hi Andreas,

Andreas Schwab wrote:
> Chris Pickett <address@hidden> writes:
>
> > When -ansi is passed to GCC, strdup becomes unavailable on MSYS/MinGW, but
> > autoconf still detects the existence of strdup.  The mingw string.h is in
> > /mingw/include/string.h, and includes some funny stuff with #ifndef
> > __STRICT_ANSI__ and later #ifndef _NO_OLDNAMES.  The former gets defined
> > by GCC with -ansi, the latter I couldn't see where it gets defined if at
> > all.
>
> If you want to use extensions you should use AC_USE_SYSTEM_EXTENSIONS.

I tried adding this before AC_PROG_CC in my example and I get the same 
result for mingw.  I don't have a problem with not being able to use 
platform extensions.  However, if the extensions are not actually 
available (because in this case I specified -ansi), I would like to be 
able to use my own version (strdup.c).  This seems to require autoconf 
to tell me the extensions aren't there as a first step, at least if I'm 
going the (LT)LIBOBJS way.

Cheers,
Chris