execution is usually unnecessary in BSD Makefiles because BSD make
invokes shells with -e. Using it to give conditional execution is
often wrong in BSD makefiles because BSD make joins shell commands
when invoked in certain ways (in particular, as `make -jN'). Example
makefile:
---
clean:
cd /
false && true
rm -rf * # a dangerous command
---
This should terminate after the `false && true' command fails, but
it doesn't when the commands are joined (`false && true' is a non-
simple command, so -e doesn't cause termination). The b-maked version:
---
clean:
cd /
false; true
rm -rf * # a dangerous command
---
terminates after the `false' command fails (`false' is a simple
command, so -e causes termination). However, for versions of
make like gnu make that don't invoke shells with -e, this change
completely breaks the makefile.
This is one of the fixes for the bug suite that caused `make world'
to sometimes put raw cpp output in .depend files. Building of cc
sometimes failed, but the failure did not terminate the build
immediately, and various wrong versions of the cc components were
used until one was wrong enough to cause a fatal error.
any case.
It makes no difference for anon account (since chroot already makes it GMT),
but if you do mirror with special non-anon login, in old variant
your mirror will be wholy retransmitted twice in the year due to
time zone changes (/etc/localtime plays bad role here)
that prevent the programs from being linked static (duplicated
symbols).
Other programs depend on kernel internals. These will have to wait
for a custom alpha kernel. For now, let's just make the build safe.
Notes:
- We no longer use -fgnu-runtime in bsd.lib.mk, since it is the default
and bsd.lib.mk is the wrong place to override it.
- Gnu C doesn't have a special compiler driver for Objective C like it
does for C++. The defaults are suitable for Gnu C. Use `OBJCLIBS='
in /etc/make.conf for POC.
signanosleep() did not deal with signal masks properly. This change was
based on a discussion with bde some time ago (at least 6 months or more).
signanosleep() should probably go away since it was never really used for
more than a few weeks and doesn't appear in released code. It should
probably be killed before somebody uses it and it becomes a gratuitous
nonstandard feature.
