Re: CC vs. CFLAGS

[Bruno Haible]

Mojca Miklavec writes:
> I'm still slightly confused about something else in that case. In the
> past I always used
> 
>     CC=gcc
>     CFLAGS="-arch ppc"
> 
> when compiling for another architecture.

The GNU standards [1][2] don't give an answer to this, but the Autoconf manual
[3] does.

I routinely use
  * CC="gcc -m32", CC="gcc -m64" on bi-arch platforms,
  * CC="gcc -mabi=n32", CC="gcc -mabi=64" on Linux/mips and IRIX,
  * CC="gcc -m31" on Linux/s390x,
  * CC="cc +DD64" on HP-UX/hppa,
  * CC="arm-linux-gnueabihf-gcc-4.8" on Linux/arm64.
This is the normal way to set CC.

Bruno

[1] https://www.gnu.org/prep/standards/html_node/Configuration.html
[2] https://www.gnu.org/prep/standards/html_node/Command-Variables.html
[3] 
https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Preset-Output-Variables.html