Buildroot: conflicting types for 'sendfile64'

[Michael Hunold]

Hi,

Peter S. Mazinger wrote:
> I have done an update to svn, please try that first, if not....

I updated svn, created a uClibc snapshot from that and ran buildroot again.

---------------------schnipp-----------------------------------
make[2]: Entering directory 
`/mnt/teemhu/devel/buildroot/buildroot/toolchain_build_mips_nofpu/uClibc'
   CC ldso/ldso/ldso.oS
In file included from ./ldso/include/ldso.h:34,
                  from ldso/ldso/ldso.c:33:
./ldso/include/dl-syscall.h: In function `_dl_exit':
./ldso/include/dl-syscall.h:69: error: syntax error before "asm"
./ldso/include/dl-syscall.h:69: error: syntax error before "asm"
./ldso/include/dl-syscall.h:69: error: syntax error before "asm"
./ldso/include/dl-syscall.h:69: error: `__v0' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h:69: error: (Each undeclared identifier is 
reported only once
./ldso/include/dl-syscall.h:69: error: for each function it appears in.)
./ldso/include/dl-syscall.h:69: error: `__a3' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h:69: error: `__a0' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h: In function `_dl_close':
./ldso/include/dl-syscall.h:72: error: syntax error before "asm"
./ldso/include/dl-syscall.h:72: error: syntax error before "asm"
./ldso/include/dl-syscall.h:72: error: syntax error before "asm"
./ldso/include/dl-syscall.h:72: error: `__v0' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h:72: error: `__a3' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h:72: error: `__a0' undeclared (first use in 
this function)
./ldso/include/dl-syscall.h: In function `_dl_open':
./ldso/include/dl-syscall.h:75: error: syntax error before "asm"
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> I need your help for this because I can't reproduce.

Perhaps you can try out buildroot and select a simple MIPS big-endian 
target.

But I understand if you're not interested in MIPS. I'll try to help you 
out as best as I can.

> the include/sys/{sendfile.h,cdefs.h}, 
> libc/sysdeps/linux/common/{sendfile.c,syscalls.h} matter.
> 
> sendfile.c includes syscalls.h, that disables __USE_FILE_OFFSET64 if it is 
> defined. after this it includes sys/sendfile.h that should catch the first 
> prototype for sendfile()
> 
> could you please add #warning here-nr(nr=1....) or something else that you 
> can identify what part you include from sendfile.h?
> 

I went back to the snapshot from today and added the checks you 
suggested in sendfile.h. I had a look at the #ifdef/#ifndef lines and 
added an appropriate warning.

---------------------schnipp-----------------------------------
teemhu uClibc% pwd
/mnt/teemhu/devel/buildroot/buildroot/toolchain_build_mips_nofpu/uClibc
teemhu uClibc% nedit include/sys/sendfile.h
---------------------schnipp-----------------------------------

This results in:
---------------------schnipp-----------------------------------
   CC libc/sysdeps/linux/common/sendfile.os
In file included from libc/sysdeps/linux/common/sendfile.c:12:
./include/sys/sendfile.h:34:2: warning: #warning "__USE_FILE_OFFSET64 
not defined"
./include/sys/sendfile.h:49:2: warning: #warning "__USE_LARGEFILE64 defined"
libc/sysdeps/linux/common/sendfile.c:18: error: conflicting types for 
'sendfile64'
./include/sys/sendfile.h:51: error: previous declaration of 'sendfile64' 
was here
libc/sysdeps/linux/common/sendfile.c:18: error: conflicting types for 
'sendfile64'
./include/sys/sendfile.h:51: error: previous declaration of 'sendfile64' 
was here
---------------------schnipp-----------------------------------

 > I assume that for some reason when you get to include sendfile.h, you 
 > have
 > __USE_FILE_OFFSET64 defined, please find the place where it gets
 > defined

Seems like __USE_FILE_OFFSET64 is *not* defined and __USE_LARGEFILE64 is 
defined.

Does this make sense?

> Thanks, Peter 

CU
Michael.