Re: [PATCH] configure.ac: Add --with-gcc-warnings configure option

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On 03/06/2012 03:33 PM, Elia Pinto wrote:
> Introduce a new --with-gcc-warnings configure option
> using a new autoconf macro that check if the compiler
> know the option passed or not in a portable way, as
> it not depends from the gcc version or from the
> other compiler used.
> 
> Signed-off-by: Elia Pinto <gitter.spiros@xxxxxxxxx>
> ---
> This is the version 2 of the patch, in which i have
> slightly changed the commit message for
> clarify the purpose. To activate the
> patch is of course necessary to do a autoreconf -vfi after
> applying the patch.
> 
> 
>  Makefile      |    2 +-
>  config.mak.in |    1 +
>  configure.ac  |  118 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 120 insertions(+), 1 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index be1957a..d0aef0f 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -310,7 +310,7 @@ endif
>  
>  CFLAGS = -g -O2 -Wall
>  LDFLAGS =
> -ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS)
> +ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS) $(AM_CFLAGS)
>
Wouldn't it be better to use $(WARN_CFLAGS) here?  It makes the purpose
of the variable clearer, and don't give the wrong impression that Automake
is involved (as the 'AM_' prefix might suggest).

>  ALL_LDFLAGS = $(LDFLAGS)
>  STRIP ?= strip
>  
> diff --git a/config.mak.in b/config.mak.in
> index b2ba710..5b7dbfd 100644
> --- a/config.mak.in
> +++ b/config.mak.in
> @@ -2,6 +2,7 @@
>  # @configure_input@
>  
>  CC = @CC@
> +AM_CFLAGS = @GIT_CFLAGS@
>
Accordingly here: s/AM_CFLAGS/WARN_CFLAGS/ and s/GIT_CFLAGS/WARN_CFLAGS/.

> +# GIT_CFLAGS_ADD(PARAMETER, [VARIABLE = GIT_CFLAGS])
> +# ------------------------------------------------
>
And here as well: s/GIT_CFLAGS/WARN_CFLAGS/.  Ditto for the rest of the
M4 file.

Regards,
  Stefano
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