'MAKE="make V=0" make' and 'V=0 ./sage -b' are broken

[mkoeppe]

Parts of our documentation (README.md, src/doc/en/faq/faq-usage.rst) recommend to use export MAKE="make -j4 -l5.5" or similar.

Other parts of the documentation recommend to add V=0 to a make command line.

If one combines both, putting V=0 inside the environment variable MAKE, one gets mysterious errors such as /bin/sh: @cd: command not found.

The same error also occurs when using export V=0 (as recommended in README.md) and then running ./sage -b.

CC: @yuan-zhou @jhpalmieri

Component: build

Author: Matthias Koeppe

Branch/Commit: f1a7f20

Reviewer: John Palmieri, Guillermo Moreno-Socías

Issue created by migration from https://trac.sagemath.org/ticket/33587

[GMS103]

comment:5

Slightly differently, after

export MAKE="make -j16"
export V=0

The command ./sage -br fails with the same error:

/bin/sh: @cd: command not found

Unsetting V eliminates the problem.

This is on SageMath 9.6.rc1.

[mkoeppe]

Branch: u/mkoeppe/make__make_v_0__make_is_broken

[mkoeppe]

Commit: f1a7f20

[mkoeppe]

New commits:

f1a7f20

build/make/Makefile.in: Remove wrong uses of AM_V_at

[mkoeppe]

Author: Matthias Koeppe

[jhpalmieri]

comment:9

The fix works for me. I would like @GMS103 to test it, too.

[GMS103]

comment:10

Test just finished, positive review too.
Thanks.

[jhpalmieri]

comment:11

Great! Feel free to add your name to the list of reviewers (click "Modify ticket" to edit that field).

[jhpalmieri]

Reviewer: John Palmieri

[GMS103]

Changed reviewer from John Palmieri to John Palmieri, Guillermo Moreno-Socías

[mkoeppe]

comment:13

Thanks both!

[vbraun]

Changed branch from u/mkoeppe/make__make_v_0__make_is_broken to f1a7f20