[OpenWrt-Devel] Makefile CFLAGS & CPU_TYPE

Claudio Thomas ct at xmodus-systems.de
Tue Aug 5 05:32:26 EDT 2014


Hi,
I'm analysing different Makefiles to learn a little bit better the way
how things are compiled by openwrt.
On some Makefiles a see CFLAGS and on others only the CPU_TYPE. So far I
see the "CFLAGS:=-Os -pipe" are default, because it not set the result
in the .config is:
CONFIG_DEFAULT_TARGET_OPTIMIZATION="-Os -pipe"
CONFIG_TARGET_OPTIMIZATION="-Os -pipe"

Is there any difference in setting
    CPU_TYPE:=603e
xor
    CFLAGS:=-Os -pipe -mcpu=603e
in the Makefile?

What is the best way?
I could not recognize a unified fashion to do it along all other targets.

-- 
Mit freundlichen Grüßen / Best regards

Claudio Thomas
Dipl.-Ing. der technischen Informatik (M.Sc.)

Leitung IT / Head of IT
Tel: +49 (0)2773 7444-137 
Fax: +49 (0)2773 7444-3137
Homepage: http://www.xmodus-systems.de
E-Mail: ct at xmodus-systems.de
GPG: http://xmodus-systems.de/gpg/ct
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