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Re: [PATCH] Makefile: add option to disable automatic dependency generation

From
Junio C Hamano <gitster@pobox.com>
Date
Nov 18, 2011, 06:12 UTC
Message-ID
<7vty62klg9.fsf@alter.siamese.dyndns.org>
In-Reply-To
<20111118045742.GA25145@elie.hsd1.il.comcast.net>
Jonathan Nieder <jrnieder@gmail.com> writes:
Show 9 quoted lines
> Duy noticed that now that the COMPUTE_HEADER_DEPENDENCIES feature is
> turned on automatically for compilers that support it (see
> v1.7.8-rc0~142^2~1, 2011-08-18), there is no easy way to force it off.
> For example, setting COMPUTE_HEADER_DEPENDENCIES to the empty string
> in config.mak just tells the makefile to treat it as undefined and
> run a test command to see if the -MMD option is supported.
>
> Introduce a new NO_COMPUTE_HEADER_DEPENDENCIES variable that forces
> the feature off.

Eek. At least at the end user UI level, couldn't we do this as a tristate? E.g. "YesPlease" (or anything that begins with Y if you are ambitious) to explicitly enable, empty (or "auto") to autodetect, and anything else to decline?

Even better, couldn't we either (1) rearrange .dep/ files somehow, so that compiler difference does not matter, or (2) have dep_check to perform a trial run to detect versions of compilers that produce the output that we cannot use?

Previous: Jonathan NiederNext: Jonathan Nieder
Message 13 of 19 in “A flaw in dep generation with gcc -MMD?”
  1. Nguyen Thai Ngoc DuyNov 18, 2011
  2. Jonathan NiederNov 18, 2011
  3. Nguyen Thai Ngoc DuyNov 18, 2011
  4. Miles BaderNov 18, 2011
  5. Nguyen Thai Ngoc DuyNov 18, 2011
  6. Nguyen Thai Ngoc DuyNov 18, 2011
  7. Samuel BronsonNov 18, 2011
  8. Jonathan NiederNov 18, 2011
  9. Andreas SchwabNov 18, 2011
  10. Nguyen Thai Ngoc DuyNov 19, 2011
  11. Makefile: add option to disable automatic dependency generationJonathan Nieder, Nov 18, 2011
  12. Jonathan NiederNov 18, 2011
  13. Junio C HamanoNov 18, 2011
  14. Jonathan NiederNov 18, 2011
  15. Makefile: add option to disable automatic dependency generationJonathan Nieder, Nov 18, 2011
  16. Makefile: add missing header file dependenciesJonathan Nieder, Nov 18, 2011
  17. Nguyen Thai Ngoc DuyNov 18, 2011
  18. Makefile: explicitly set target name for autogenerated dependenciesJonathan Nieder, Nov 18, 2011
  19. Nguyen Thai Ngoc DuyNov 19, 2011

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