Re: [SHELL] Fix 64-bit Solaris build

[Jonathan Perkin <jperkin@joyent.com>]

* On 2016-06-06 at 15:27 BST, Herbert Xu wrote:

> On Fri, Dec 11, 2015 at 01:07:14PM +0000, Jonathan Perkin wrote:
> > In a 64-bit Solaris environment there is no stat64() function, only
> > stat().  This conflicts with the stat64 #define used to support
> > dietlibc/klibc when stat64() is not found and results in:
> > 
> >   ./../config.h:194:16: error: redefinition of 'struct stat'
> >    #define stat64 stat
> >                 ^
> >   In file included from cd.c:36:0:
> >   /usr/include/sys/stat.h:217:8: note: originally defined here
> >    struct stat {
> >           ^
> > 
> > Instead, add a AC_CHECK_DECL test for stat64, and only perform the
> > AC_CHECK_FUNC test if it isn't already defined.
> 
> I don't understand, does stat64 exist or not? If it doesn't then
> how can AC_CHECK_DECL help? Or do you mean that it only exists as
> a macro?

Right, it only exists as a macro, defined as

  #define stat64 stat
  
in sys/stat.h.  The AC_CHECK_FUNC test fails as it doesn't pull in any
includes, and cannot find a stat64() function in libc.

Adding the AC_CHECK_DECL test finds the definition and avoids running
the AC_CHECK_FUNC tests if that is the case.

-- 
Jonathan Perkin  -  Joyent, Inc.  -  www.joyent.com