[OE-core] [PATCH] rmc: Fix compiling issue with musl

[Khem Raj]

On 11/14/16 3:08 PM, Jianxun Zhang wrote:
> 
>> On Nov 14, 2016, at 2:50 PM, Khem Raj <raj.khem at gmail.com> wrote:
>>
>>
>>
>> On 11/14/16 2:10 PM, Jianxun Zhang wrote:
>>> | src/rmcl/rmcl.c: In function 'query_policy_from_db':
>>> | src/rmcl/rmcl.c:254:25: error: unknown type name 'ssize_t'
>>> | ssize_t cmd_name_len = strlen((char *)&rmc_db[policy_idx]) + 1;
>>> | ^~~~~~~~
>>>
>>> The musl C lib provides ssize_t but we need to enable it
>>> with a macro.
>>>
>>> Signed-off-by: Jianxun Zhang <jianxun.zhang at linux.intel.com>
>>> ---
>>> Before maintainer(s) push "merge" button, please read this short summary.
>>> I feel there could be a better syntax to do it. And We could need to get
>>> an ack from Hernandez, Alejandro who reported this issue and seems still
>>> have (other) compiling errors even with this patch.
>>>
>>> I submit this patch based on my thoughts and test out of tiny config.
>>>
>>> Tests:
>>> () Specify TCLIBC = "musl" in local.conf in my build dir.
>>> () Build quark
>>> () I can see this issue happens without the fix
>>> () With this patch and do clean builds for quark and corei7-64,
>>> Compiling passes. Boot test passed on RMC targets quark and Broxton-m.
>>>
>>> Thanks
>>>
>>>
>>> common/recipes-bsp/rmc/rmc.bb | 2 ++
>>> 1 file changed, 2 insertions(+)
>>>
>>> diff --git a/common/recipes-bsp/rmc/rmc.bb b/common/recipes-bsp/rmc/rmc.bb
>>> index aeaf12e..61a1bdb 100644
>>> --- a/common/recipes-bsp/rmc/rmc.bb
>>> +++ b/common/recipes-bsp/rmc/rmc.bb
>>> @@ -24,6 +24,8 @@ COMPATIBLE_HOST = "(x86_64.*|i.86.*)-linux*"
>>>
>>> EXTRA_OEMAKE='RMC_CFLAGS="-Wl,--hash-style=both"'
>>>
>>> +EXTRA_OEMAKE_append_libc-musl = '" -D__NEED_ssize_t"'
>>
>> this is not right way to handle it. you should be doing something like
>> #include <sys/types.h> in your source file
> Khem,
> Thanks lot for your review even when I wrongly submit it here! I tried it first but didn’t succeed for some reason with the suggested change.

mostly, it could be the makefiles not respecting the compiler options passed
from bitbake. You have to make sure that, all the -I<dir> options are used
properly which are relative to sysroot.

> 
> Let me try it again...
> 
>>
>>
>>> +
>>> # from gnu-efi, we should align arch-mapping with it.
>>> def rmc_efi_arch(d):
>>>     import re
> 

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