[bug #54740] .SILENT: propagates into recursive makes

[David Boyce]

URL:
  <https://savannah.gnu.org/bugs/?54740>

                 Summary: .SILENT: propagates into recursive makes
                 Project: make
            Submitted by: boyski
            Submitted on: Thu 27 Sep 2018 03:32:36 AM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.2.1
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

This seems to be either a code or documentation bug. Consider the following
set of trivial makefiles:

% head *
==> GNUmakefile <==
.SILENT:
all:; +$(MAKE) -f sub.mk

==> sub.mk <==
all:; @:$(info In sub-make MAKEFLAGS="$(MAKEFLAGS)")

When make is run:

% make
In sub-make MAKEFLAGS="s"

We see that the .SILENT: setting in the top makefile has been propagated into
the child make by adding "s" to MAKEFLAGS, but there's nothing in the
documentation which says this will or should happen. I'd expect it to have the
scope of the current make process only.

My particular case is a makefile which does some setup and then invokes the
Linux kernel makefile suite. I wanted the setup makefile to be relatively
silent but had no intention of affecting verbosity of the kernel build
itself.






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