-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Keith MARSHALL on 12/1/2006 7:56 AM: >> checking for MAP_ANON in sys/mman.h... no >> checking for /dev/zero... configure: error: cannot check for file >> existence when cross compiling >> >> This comes from the >> AC_CHECK_FILE(/dev/zero) > > That's because AC_CHECK_FILE tests a feature of the *host*, not the > *build* environment. If you use AC_CHECK_FILE in your configure.ac, > (or if you insist, configure.in) then you *cannot* cross compile the > application. And, if you want to build MinGW apps under Cygwin, you > *must* be able to cross compile. One other thing you can do to try to still allow cross-compiling in this case is to prepopulate the cache. Since mingw doesn't have /dev/zero, you might be able to get away with running './configure ... ac_cv_file_dev_zero=no'. But I also wonder why this application is checking for /dev/zero - there are a number of unportable mmap checking macros out there in the world, that should be improved to not even attempt the AC_CHECK_FILE when cross-compiling. - -- Life is short - so eat dessert first! Eric Blake ebb9@xxxxxxx -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFcEic84KuGfSFAYARAjygAJ0QMVUGB7yx7R4R01LlIHSFwcy5wgCfe+4s QhdzltQpYUXjHvNIoz2xCv4= =28dT -----END PGP SIGNATURE----- _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
