Description of problem:
Sendmail 8.12.7 was released with an m4 quoting bug in m4/proto.m4. See:
The latest Phoebe sendmail package has this bug.
Version-Release number of selected component (if applicable):
Try to build a .cf file from an .mc file.
*** ERROR: FEATURE() should be before MAILER()
The patch is simple, and is already available:
Should be in 8.12.7-5 or higher available soon in rawhide.
Thanks a lot,
Florian La Roche