glibc 2.25 is going to deprecate the definition of 'major', 'minor', and 'makedev' by sys/types.h; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for rationale. (It was found to be impractical to remove sys/types.h from stdlib.h.) Unfortunately, AC_HEADER_MAJOR does not detect that these macros are now throwing warning messages if you don't include sys/sysmacros.h, and this is reported to break software that uses -Werror (see the very end of the above bug report). The ideal solution to this problem would be if there _already existed_ a way for sys/types.h to detect that it's being included by an autoconf test program. When it saw that, it would not define major/minor/makedev at all, which would poke AC_HEADER_MAJOR to go looking for sys/sysmacros.h. Inspecting a trivial generated configure script, though, I don't see any obvious method. A less ideal method would be for autoconf and glibc to agree on a macro that AC_HEADER_MAJOR would define before including sys/types.h, with the same effect -- I consider this less than ideal mainly because there's no schedule for autoconf 2.70, whereas glibc 2.25 is due out in about five months. Have I missed either a way to carry out the ideal solution, or a third alternative? Failing that, can we get the ball rolling on option B, please? zw _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
