Re: Where did the Cygwin and Mingw checks go? (patch suggestion)

[Paul Berrevoets]

But you and I were both talking about files that get generated at link time. 
AC_OBJEXT
does not link, and therefore should be no problem. The problem lies in 
AC_EXEEXT. Your
technique needs to be modified somewhat because you are not using file globbing 
for
'conftest.o' and 'conftest.obj'. How about:

    for ac_file in conftest.exe* conftest.*; do
       case $ac_file in
         *.$ac_ext | *.o | *.obj | *.xcoff) ;;
         *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`
           break;;
       esac
     done
--
Paul

"Lars J. Aas" wrote:

> On Wed, Nov 22, 2000 at 03:50:58PM -0500, Paul Berrevoets wrote:
> : This is ok for AC_OBJEXT, but for AC_EXEEXT please take into consideration 
> that on
> : UWIN (which uses a cc wrapper for MSVC), the compiler also generates a .pdb 
> file,
> : which if you don't filter it out along with .obj, would be used as the 
> extension
> : for executables.
>
> As I mentioned under another subject, Borland C++ creates a .tds file that 
> destroys
> the current test.
>
> How about something like this?
>
>   Lars J
>
> Index: acspecific.m4
> ===================================================================
> RCS file: /cvs/autoconf/acspecific.m4,v
> retrieving revision 1.316
> diff -u -r1.316 acspecific.m4
> --- acspecific.m4       2000/11/17 16:45:24     1.316
> +++ acspecific.m4       2000/11/22 21:15:18
> @@ -1228,11 +1228,15 @@
>  [AC_CACHE_CHECK([for object suffix], ac_cv_objext,
>  [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
>  if AC_TRY_EVAL(ac_compile); then
> -  for ac_file in conftest.*; do
> -  case $ac_file in
> -    *.$ac_ext) ;;
> -    *) ac_cv_objext=`echo $ac_file | sed s/conftest.//` ;;
> -  esac
> +  ac_cv_objext=not_figured_out_yet
> +  for ac_file in conftest.o conftest.obj conftest.*; do
> +    if test -f $ac_file; then
> +      case $ac_file in
> +        *.$ac_ext) ;;
> +        *) ac_cv_objext=`echo $ac_file | sed s/conftest.//` ;;
> +      esac
> +      test $ac_cv_objext = not_figured_out_yet || break
> +    fi
>    done
>  else
>    rm -f conftest.$ac_ext