Re: -fno-inline -O1 breaks ntohs()

[Christopher Faylor <cgf-no-personal-reply-please at cygwin dot com>]

On Mon, Sep 18, 2006 at 10:04:45AM +1200, Danny Smith wrote:
>
>> Testcase:
>> ------------------------------
>> #include <arpa/inet.h>
>> 
>> int main()
>> {
>>   volatile short s = 33, t;
>> 
>>   t = ntohs(s);
>>   return 0;
>> }
>> ------------------------------
>> 
>> > i686-pc-cygwin-gcc -fno-inline  -o test test.c 
>> i686-pc-cygwin-gcc -O1 
>> > -fno-inline  -o test test.c
>> /tmp/ccswmuY9.o:test.c:(.text+0x27): undefined reference to `___ntohs'
>> collect2: ld returned 1 exit status
>> >
>
>
>Try the obvious  patch to include/asm/byteorder.h
>
>*** byteorder.h.bak	Wed May 17 19:41:51 2006
>--- byteorder.h	Mon Sep 18 09:58:37 2006
>*************** __ntohs(uint16_t x)
>*** 70,76 ****
>  #define __constant_htonl(x) __constant_ntohl(x)
>  #define __constant_htons(x) __constant_ntohs(x)
>  
>! #ifdef  __OPTIMIZE__
>  #  define ntohl(x) \
>  (__builtin_constant_p((long)(x)) ? \
>   __constant_ntohl((x)) : \
>--- 70,76 ----
>  #define __constant_htonl(x) __constant_ntohl(x)
>  #define __constant_htons(x) __constant_ntohs(x)
>  
>! #if defined __OPTIMIZE__ && !defined   __NO_NOINLINE__
>  #  define ntohl(x) \
>  (__builtin_constant_p((long)(x)) ? \
>   __constant_ntohl((x)) : \

Thanks, Danny.  I'll check that in.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/