Re: stdbool.h gcc compiler query

[uwe%stderr.spb.ru@localhost (Valery Ushakov)]

Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:

> On Thu, Aug 08, 2013 at 11:09:12AM +0100, Patrick Welche wrote:
>
>> One of the hunks of XSA-55 which I am trying to apply to xenkernel42 is:
>> 
>> --- a/xen/include/xen/libelf.h
>> +++ b/xen/include/xen/libelf.h
>> @@ -29,6 +29,11 @@
>>  #error define architectural endianness
>>  #endif
>>  
>> +#include <stdbool.h>
>> +
>> +typedef int elf_errorstatus; /* 0: ok; -ve (normally -1): error */
>> +typedef int elf_negerrnoval; /* 0: ok; -EFOO: error */
>> +
>>  #undef ELFSIZE
>>  #include "elfstructs.h"
>>  #ifdef __XEN__
>> 
>> $ ls -l /usr/include/stdbool.h 
>> -r--r--r--  1 root  wheel  1784 Apr 29 17:46 /usr/include/stdbool.h
>> 
>> and the beginning of the long compiler line copied below contains
>> -I/usr/include (as well as -nostdinc), so why do I see
>> 
>> In file included from libelf-private.h:25:0,
>>                  from libelf-tools.c:19:
>> /tmp/pkgsrc/sysutils/xenkernel42/work.x86_64/xen-4.2.2/xen/include/xen/libelf.h:32:21:
>>  fatal error: stdbool.h: No such file or directory
>> compilation terminated.
>> 
>> ? (This is on -current/amd64)
> 
> I guess it's because the -I/usr/include is after the -nostdinc
> 
> Is stdbool.h really needed here ? AFAIK the build of the elf kernel
> should not rely on host includes, only its own includes.

<sys/types.h> defines bool/true/false for the kernel

-uwe