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cross-compiler problem under Cygwin
- To: cygwin at sources dot redhat dot com
- Subject: cross-compiler problem under Cygwin
- From: Joel Sherrill <joel dot sherrill at OARcorp dot com>
- Date: Fri, 05 Jan 2001 11:32:54 -0600
- Organization: OAR Corporation
- References: <20000530151523.A5534@cygnus.com>
- Reply-To: joel dot sherrill at OARcorp dot com
Hi,
I am using the current net release of Cygwin to build RTEMS to
target an m68k (ELF format). When the configure script tries
to see if the cross compiler works, it will execute this
fragment from a configure script:
================
cat > conftest.$ac_ext << EOF
#line 1253 "configure"
#include "confdefs.h"
main(){return(0);}
EOF
if { (eval echo configure:1258: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } &&
t
est -s conftest${ac_exeext}; then
ac_cv_prog_cc_works=yes
# If we can't run a trivial program, we are probably using a cross compiler.
if (./conftest; exit) 2>/dev/null; then
=================
Cygwin under WinME/95 passes this test and apparently refuses to run
"./conftest".
Cygwin under WinNT/2000 allows ./conftest to be executed. Even worse, this
conftest will execute enough to go into a hard loop which can't be killed with
<ctl>-C.
I believe that Cygwin should refuse to execute this program. Is there
any provision for checking a magic number on the executable?
I can provide the executable if this is desired.
Thanks.
--
Joel Sherrill, Ph.D. Director of Research & Development
joel@OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985
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