Here's a somewhat old bug report that I neglected to forward upstream earlier. This was reported against the Debian GNU/Linux package for 2.13, but appears to be an upstream bug. [snippage below] ------- Start of forwarded message ------- Subject: Bug#62180: autoconf: Does not detect EMX in AC_EXEEXT Reply-To: [EMAIL PROTECTED], [EMAIL PROTECTED] From: [EMAIL PROTECTED] Message-Id: <20000411044748.9BE8915039@perkele> Date: Tue, 11 Apr 2000 06:47:48 +0200 (CEST) The AC_EXEEXT macro only detects that CygWin and Mingw32 need to add .exe= on binary files, it does not detect EMX. I have to do this in configure.in t= o get it to work correctly: AC_EXEEXT AC_MSG_CHECKING([for EMX]) AC_TRY_COMPILE(, [#ifndef __EMX__ Syntax Error #endif ], have_emx=3Dyes, have_emx=3Dno) AC_MSG_RESULT($have_emx) if test "$have_emx" =3D "yes"; then EXEEXT=3D.exe fi ------- End of forwarded message -------