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Message-ID: <20151022232330.GG10551@port70.net>
Date: Fri, 23 Oct 2015 01:23:30 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Cc: Rich Felker <dalias@...c.org>
Subject: Re: Having hard time adding to CFLAGS
* Denys Vlasenko <vda.linux@...glemail.com> [2015-10-23 00:31:09 +0200]:
> Let's say I need to add a gcc option to my musl build.
>
> configure says:
> ...
> Some influential environment variables:
> CC C compiler command [detected]
> CFLAGS C compiler flags [-Os -pipe ...]
> CROSS_COMPILE prefix for cross compiler and tools [none]
> LIBCC compiler runtime library [detected
>
> So I try this, combining all possible ways of passing CFLAGS
> (past experience is that different projects do it differently).
>
> CFLAGS is in environment, and on both configure and make
> command lines:
>
> export CFLAGS="-falign-functions=1" # for example
> ./configure CFLAGS="$CFLAGS"
> make CFLAGS="$CFLAGS"
this is not what configure said...
> Evidently, my CFLAGS replaced needed flags instead of being added at the end.
>
> Can this be fixed? If user needs to use e.g. EXTRA_CFLAGS instead,
> please fix configure --help.
it can be fixed, but i think 'needed flag' is not
always clear and overriding CFLAGS on the make
commandline is not polite.
the attached patch makes this work, but i
consider -Os to be not part of 'needed'
View attachment "a.diff" of type "text/x-diff" (1394 bytes)
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