1401258 - Unrecognized flag in mozconfig will trigger error output that tells me to build with "make" instead of "mach"

Status: NEW

(Firefox Build System :: General, defect)

Description

[Daniel Holbert [:dholbert]]

STR:
 1. Put this in your mozconfig (e.g. as the only line):
ac_add_options --disable-something

 (This triggers a build error, because it's an unsupported build option)

 2. ./mach build

ACTUAL RESULTS:
The build error output includes the following instructions:
 0:02.82 mozbuild.configure.options.InvalidOptionError: Unknown option: --disable-something
 0:02.84 *** Fix above errors and then restart with\
 0:02.84                "/usr/bin/make -f client.mk build"


EXPECTED RESULTS:
The build system should not instruct me to run "/usr/bin/make".  As I understand it, that is not the recommended way of building these days, nor has it been for quite a while.


(I also filed bug 1401255 on some other noise earlier in the error output; marking that as "see also".)