bare metal with C++ support?
Yann E. MORIN
yann.morin.1998@anciens.enib.fr
Tue Jan 27 22:12:00 GMT 2009
Allen,
All,
On Tuesday 27 January 2009 22:54:18 Allen Curtis wrote:
> Using the sample configuration, such as armeb-unknown-eabi, does not
> build g++. When you go into menuconfig, you are not given the option
> to build any language other than C when you select bare-metal. I do
> not see how this could just work....
Using 1.3.1, he? Try svn trunk, that's supported. Please also note that
this is marked "EXPERIMENTAL".
Also note that those bare-metal toolchains are /truly/ bare-metal, in
that there will be *no* C library at all in the toolchain, not even newlib.
From my understanding, a bare-metal compiler/toolchain is the strict
minimum to compile, build and assemble source code. You are then on your
own to provide "system support libraries".
For example, a bootloader does not need a C library to build (APEX at
least doesn't); the kernel should be buildable by a bare-metal compiler,
alas there's ACPI stuff that relies on the compiler setting some defines
that are available only on target tuples like *-*-linux-* (or so is my
understanding of the issue). I managed to build a workable ARM Linux 2.6.26
(or was it .25?) with such a truly bare-metal toolchain, but without ACPI.
Maybe I should poke the ACPI people about the issue...
Regards,
Yann E. MORIN.
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