Re: AC_OBJEXT again

[Lars J. Aas]

On Thu, Nov 30, 2000 at 10:15:32AM +0100, Akim Demaille wrote:
: +    AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
: +    if AC_TRY_EVAL(ac_link); then
: +      for ac_file in `ls conftest conftest.exe conftest.* 2>/dev/null`; do
: +     case $ac_file in
: +       *.$ac_ext | *.o | *.obj | *.xcoff | *.tds) ;;
: +       *) ac_cv_exeext=`expr "$ac_file" : 'conftest\(.*\)'`
: +          break;;
: +     esac
: +      done
: +      rm -f conftest.$ac_objext conftest.$ac_ext
: +    else
: +      AC_MSG_ERROR([cannot compile and link])
: +    fi
: +    ;;

This test will report `' on Cygwin caused by some Cygwin magic.  Even though
the file is named `conftest.exe', doing `ls conftest' will return `conftest',
and doing `test -f conftest' will return true.  Doing a plain `ls' will not
return that virtual file, though.  You therefore need to "test for" (read: ls)
the .exe extension first.

  Lars J