On May 27, 2010, at 4:43 PM, Eric Blake wrote: > On 05/27/2010 01:23 PM, Todd Rinaldo wrote: >> Today, I ran into an issue compiling m4 on RHEL6 beta. I had to apply this >> patch to make it work or I got errors about S_ISDIR not being defined during >> linking. Any ideas why this was an issue? > > Thanks for the report. Most likely, this is an actual bug in m4 relying > on the laziness of older systems that implicitly included <sys/stat.h> > inside other headers; contrasted with recent glibc which has > intentionally been tightening down system headers to avoid such > namespace pollution. POSIX states that <fcntl.h> may, but not must, > include <sys/stat.h>; and it looks like m4.h had another include path > that included <fcntl.h> but not explicitly <sys/stat.h>.
Eric, I'm dying to know... How the heck did RHEL 6 m4 get built against RHEL 6 libc when there's no patch in the spec file? Todd
