WIP: Metal depend script #251
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Let applications override our definition of __iob by declaring it as 'weak' Signed-off-by: Keith Packard <keithp@keithp.com>
This finds the necessary freedom metal sources from the device tree file and then constructs the application from that, rather than linking againts a library. There are also a couple of helper makefile fragments: * metal-depend.make Contains instructions for building generated files from the BSP * freedom-metal.make Contains instructions for building a complete application Signed-off-by: Keith Packard <keithp@keithp.com>
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Here's the start of a method for building applications that use freedom metal from source,
rather than creating a library for freedom-metal and then linking against that.
The core of the change is a new script, metal_depend.py, which lives in the freedom-metal
repository. That takes a .dts file and constructs the set of freedom metal source files required.
Along with that script, there are two makefile fragments:
metal-depend.make -- this has instructions for building the DTS-based files for a project, but not for compiling any sources. You get the metal header files, a metal.mk file which holds the sources needed by the target and a linker script.
freedom-metal.make -- this has complete instructions for building a freedom-metal application. It uses metal-depend.make.
TODO: