4.2.1
[SV 102] Don't show unnecessary include file errors.
Convert all "`'" quotes to "''" per new GNU Coding Standard guidelines. Fixes Savannah bug #34530.
Various minor updates and code cleanups.
* Added the test suite to the main distribution.
* job.c (child_error): Combine file info with error message.
Fix Savannah bug #20452.
* tests/run_make_tests.pl: Preserve $make_command
[SV 47151] Exit with 1 when checking recursive make -q
Commit fix for bug #1418. Upgrade to require autoconf 2.56. Fix a pathological performance hit substituting in large values with lots of words.
[SV 39203] Don't set MAKEFLAGS when restarting.
* Various fixes for problems in the 3.79.0.1 pretest.