On 29/03/2014 9:10 am, Hesham Moustafa wrote:
Hi,
A few weeks ago I was able to build gcc linked with newlib for
or1k-rtems* target. But, I had to
do some work-arounds to get it working which I think I have to discuss
it with you.
First issue, is that when building gcc/newlib with --enable-threads
option, I got a lot of errors
which fade out when building with --disable-threads.
folks at openrisc IRC channel told me that newlib (with threads) never
been used.
We enable threads when building newlib so it looks like we need to clean
this up.
Another issue was about some errors raised by inconsistent definition of
ssize_t type for
or1k target. Gedare mentioned that ssize_t should be defined in the or1k
target's source.
I asked about where (in or1k source) to define ssize_t and or1k people
told me it should
be defined at RTEMS. To be able to get around this issue, I had to
replace ssize_t at
crt0.c with int in the related functions prototypes.
The tools need to define ssize_t. RTEMS uses the machine level
parameters provided to it by the tools and selected switches. These know
the specific configuration being built. I suspect this is done in newlib
somewhere.
For the same file (crt0.c) another compilation error is:
"error: expected ‘)’ before ‘*’ token RTEMS_STUB(int,
sigfillset(sigset_t *set), { return -1; })"
This macro is expanded to:
"int (*(sigset_t *set) = ~(0), 0) { return -1; }"
I had to comment this macro to pass this error.
I am not sure about this one. I need to take a closer look at the code
and the patch.
Finally, some compilation errors which are related to POSIX (like
undeclared NAME_MAX)
were avoided by re-declaring these macros at the file raising such errors.
I can provide any further details or error messages if required. Please
suggest solutions
to get rid of these error in the right way. The patch for newlib that
adds support for or1k and
RTEMS against newlib-2.1.0 is there [1]
In the coming days I will take a look at the patch and port and see what
is happening.
Chris
[1]
https://github.com/heshamelmatary/or1k-rtems/blob/master/patches/newlib-2.1.0-or1k-rtems.diff
Regards,
Hesham
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