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This cleans up the build process for all architectures, providing a
common place to specify vpath, cflags and build rules for various
common files.
Signed-off-by: Keith Packard <keithp@keithp.com>
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And fix up the related messages.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Adds:
-Wpointer-arith
-Wstrict-prototypes
-Wmissing-prototypes
-Wmissing-declarations
-Wnested-externs
Signed-off-by: Keith Packard <keithp@keithp.com>
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Stop using pdclib
Signed-off-by: Keith Packard <keithp@keithp.com>
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This way it can be incorporated into multiple operating systems more easily.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Redefines some stdio bits so that we can build with either pdclib or
newlib + avr stdio.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Mis-placed )
Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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Signed-off-by: Keith Packard <keithp@keithp.com>
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Gcc 5.4.1 tracks alignment of data through assignments, so that a
uint32_t pointer which comes from byte-aligned uint8_t data:
extern uint8_t foo[];
uint32_t *q = (void *) foo;
Fetches and stores through this pointer are done bytewise. This is
slow (meh), but if q references a device register, things to bad very
quickly.
This patch works around this bug in the compiler by adding
__attribute__((aligned(4))) tags to some variables, or changing them
from uint8_t to uint32_t. Places doing this will now be caught as I've
added -Wcast-align to the compiler flags. That required adding (void
*) casts, after the relevant code was checked to make sure the
compiler could tell that the addresses were aligned.
Signed-off-by: Keith Packard <keithp@keithp.com>
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Basic clock configuration, OS support, LED and USB drivers.
Signed-off-by: Keith Packard <keithp@keithp.com>
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