Problem with vectors in g++

[JeanDean]

I am trying to use "User-difned allocator " but on compilation it is
giving conflicts for memcopy
declarations with in string.h .

Please refer the below compile error log:

any suggestions how to resolve this???

g++ -g -DUNIX -DLINUX -DX86 -DCONIC_X86 -DCOMP_X86 -DDRAW_X86 -
DDR_X86 -DDEBUG -DDEBUGforCDC -DDEBUG_COMMANDLOG -DSUPPORT_IPS -
DTARGET_IRIPS -DTARGET_06S -DUSE_MEMCPY -DBUGFIX_RPCS_SPL_FLUSH -
DBUGFIX_POLYLINE_CLIP -I. -I../src -I../include -I../../include -I../
include/gps -I../../libge/include -I../../libdraw3/include -I../../
libipa/inc -I../../libdi/inc -c -o render.o ../src/render.c
In file included from /usr/include/g++-3/stl_algobase.h:48,
from /usr/include/g++-3/vector:30,
from ../include/pr_internal.h:15,
from ../include/object.h:9,
from ../include/spool.h:13,
from ../src/render.c:27:
/usr/include/string.h:242: declaration of C function `void memcpy
(void
*, const void *, unsigned int)' conflicts with
/usr/include/string.h:42: previous declaration `void *memcpy (void *,
const void *, unsigned int)' here

 

[paul.joseph.davis]

I am trying to use "User-difned allocator " but on compilation it is
giving conflicts for memcopy
declarations with in string.h .

Please refer the below compile error log:

any suggestions how to resolve this???

g++ -g -DUNIX -DLINUX -DX86 -DCONIC_X86 -DCOMP_X86 -DDRAW_X86 -
DDR_X86 -DDEBUG -DDEBUGforCDC -DDEBUG_COMMANDLOG -DSUPPORT_IPS -
DTARGET_IRIPS -DTARGET_06S -DUSE_MEMCPY -DBUGFIX_RPCS_SPL_FLUSH -
DBUGFIX_POLYLINE_CLIP -I. -I../src -I../include -I../../include -I../
include/gps -I../../libge/include -I../../libdraw3/include -I../../
libipa/inc -I../../libdi/inc -c -o render.o ../src/render.c
In file included from /usr/include/g++-3/stl_algobase.h:48,
from /usr/include/g++-3/vector:30,
from ../include/pr_internal.h:15,
from ../include/object.h:9,
from ../include/spool.h:13,
from ../src/render.c:27:
/usr/include/string.h:242: declaration of C function `void memcpy
(void
*, const void *, unsigned int)' conflicts with
/usr/include/string.h:42: previous declaration `void *memcpy (void *,
const void *, unsigned int)' here

Jean,

There are a couple options:
1) Rename your function to something other than memcpy.
2) Don't include strings.h in a file where you use your memcpy
function.
3) Place your version of memcpy in a namespace and access it with the
fully qualified namespace.
4) Place your version of mempcy in an object if it makes sense.

The option you should go with is probably option 1. Naming a function
the same as a standard function is generally a Bad Idea (TM).

HTH,
Paul Davis

 

[JeanDean]

Jean,

There are a couple options:
1) Rename your function to something other than memcpy.
2) Don't include strings.h in a file where you use your memcpy
function.
3) Place your version of memcpy in a namespace and access it with the
fully qualified namespace.
4) Place your version of mempcy in an object if it makes sense.

The option you should go with is probably option 1. Naming a function
the same as a standard function is generally a Bad Idea (TM).

HTH,
Paul Davis

Actually it is conflicting in the string.h itself.
Line number 242 and 42 of string.h


Line 242 in string.h

#if defined __USE_BSD
/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
extern void bcopy (__const void *__src, void *__dest, size_t __n)
__THROW;


Line 42 in string.h

/* Copy N bytes of SRC to DEST. */
extern void *memcpy (void *__restrict __dest,
__const void *__restrict __src, size_t __n)
__THROW;
/* Copy N bytes of SRC to DEST, guaranteeing
correct behavior for overlapping strings. */
extern void *memmove (void *__dest, __const void *__src, size_t __n)
__THROW;

 

[Jacek Dziedzic]

Actually it is conflicting in the string.h itself.
Line number 242 and 42 of string.h


Line 242 in string.h

#if defined __USE_BSD
/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
extern void bcopy (__const void *__src, void *__dest, size_t __n)
__THROW;


Line 42 in string.h

/* Copy N bytes of SRC to DEST. */
extern void *memcpy (void *__restrict __dest,
__const void *__restrict __src, size_t __n)
__THROW;
/* Copy N bytes of SRC to DEST, guaranteeing
correct behavior for overlapping strings. */
extern void *memmove (void *__dest, __const void *__src, size_t __n)
__THROW;

That's pretty weird, since on line 242 you have 'bcopy'
and not 'memcpy'. Maybe someone happily #defined bcopy to memcpy?

HTH,
- J.