Feedback on release notes - there are a couple of things unclear at least to me:
> the -l/--load-average option will use the contents of that file to determine how many jobs are running at any given instant, and compare that value to the load value requested. Compare and do what? This doesn't make sense to me. > This allows usage such as "-j -lN" for N-processor systems without fear of overload. There's never a fear of overload when explicitly specifying -lN for an N-processor system, is there? > It will select POSIX_SPAWN_USEVFORK where that is available.... Does this mean that the autotools config system will select POSIX_SPAWN_USEVFORK? That's not a behavior of GNU make per se. On Mon, Aug 26, 2019 at 6:01 AM Paul Smith <psm...@gnu.org> wrote: > -------------------------------------------------------------------- > GNU make is a tool which controls the generation of executables and > other non-source files of a program from the program's source files. > > You can learn more at: https://www.gnu.org/software/make/ > -------------------------------------------------------------------- > > A new release candidate for GNU make 4.3 is available now for download: > > 36083ab822b50a9ecbf5467cdadff55c make-4.2.90.tar.bz2 > e2c9abdeaf3725f8654a5e9d7a121fa9 make-4.2.90.tar.gz > > You can obtain a copy from: https://alpha.gnu.org/gnu/make/ > > - NEWS ---------------------------------------------------------------- > > Version 4.2.90 (26 Aug 2019) > > A complete list of bugs fixed in this version is available here: > > > https://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=108&set=custom > > * WARNING: Backward-incompatibility! > Number signs (#) appearing inside a macro reference or function > invocation > no longer introduce comments and should not be escaped with backslashes: > thus a call such as: > foo := $(shell echo '#') > is legal. Previously the number sign needed to be escaped, for example: > foo := $(shell echo '\#') > Now this latter will resolve to "\#". If you want to write makefiles > portable to both versions, assign the number sign to a variable: > H := \# > foo := $(shell echo '$H') > This was claimed to be fixed in 3.81, but wasn't, for some reason. > To detect this change search for 'nocomment' in the .FEATURES variable. > > * WARNING: Backward-incompatibility! > Previously appending using '+=' to an empty variable would result in a > value > starting with a space. Now the initial space is only added if the > variable > already contains some value. Similarly, appending an empty string does > not > add a trailing space. > > * WARNING: Backward-incompatibility! > On Linux, and any other systems that provide a /proc/loadavg with similar > syntax, the -l/--load-average option will use the contents of that file > to > determine how many jobs are running at any given instant, and compare > that > value to the load value requested. This allows usage such as "-j -lN" > for > N-processor systems without fear of overload. > Patch provided by Sven C. Dack <sven.c.d...@sky.com> > > * WARNING: Backward-incompatibility! > Contrary to the documentation, suffix rules with prerequisites were being > treated BOTH as simple targets AND as pattern rules. Behavior now > matches > the documentation, and pattern rules are no longer created in this case. > > * New feature: Grouped explicit targets > Pattern rules have always had the ability to generate multiple targets > with > a single invocation of the recipe. It's now possible to declare that an > explicit rule generates multiple targets with a single invocation. To > use > this, replace the ":" token with "&:" in the rule. To detect this > feature > search for 'grouped-target' in the .FEATURES special variable. > Implementation contributed by Kaz Kylheku <k...@kylheku.com> > > * Makefiles can now specify the '-j' option in their MAKEFLAGS variable and > this will cause make to enable that parallelism mode. > > * GNU make will now use pthread_spawn() on systems where it is available. > It will select POSIX_SPAWN_USEVFORK where that is available. If you > prefer > to use fork/exec even on systems where pthread_spawn() is present, you > can > use the --disable-pthread-spawn option to configure. > Aron Barath <baratha...@caesar.elte.hu> provided the basic > implementation. > > * Error messages printed when invoking non-existent commands have been > cleaned > up and made consistent. > > * The previous limit of 63 jobs under -jN on MS-Windows is now > increased to 4095. That limit includes the subprocess started by > the $(shell) function. > > * A new option --no-silent has been added, that cancels the effect of the > -s/--silent/--quiet flag. > > * A new option -E has been added as a short alias for --eval. > > * All wildcard expansion within GNU make, including $(wildcard ...), will > sort > the results. See https://savannah.gnu.org/bugs/index.php?52076 > > * Interoperate with newer GNU libc and musl C runtime libraries. > > * Performance improvements provided by Paolo Bonzini <pbonz...@redhat.com> > > GNU make Developer News > > * Import the GNU standard bootstrap script to replace the hand-rolled > "make update" method for building code from a GNU make Git repository. > > * Rework the source distribution to move source files into the src/* > subdirectory. This aligns with modern best practices in GNU. > > * Replace local portability code with Gnulib content. Unfortunately due > to a > problem with Gnulib support for getloadavg, this forces a requirement on > Automake 1.16 or above in order to build from Git. See README.git. > _______________________________________________ > Bug-make mailing list > Bug-make@gnu.org > https://lists.gnu.org/mailman/listinfo/bug-make >
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