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List:       gcc-bugs
Subject:    Different behaviour of gcc and g++ (egcs-1.1.1 release)
From:       Carlo Wood <carlo () runaway ! xs4all ! nl>
Date:       1999-03-03 13:38:38
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Hiya,

the following very simple C program does compile as C++ program,
but the C compiler refuses to compile it.  Is this a bug?

-----------------------------------------------------------------------------
void foo(char const * const * t) { }

int main(void)
{
  char *tok[10];
  foo(tok);
  return 0;
}
-----------------------------------------------------------------------------

Compiled as C++:

~/c/tests>g++ -Wall -pedantic const.cc
~/c/tests>

Compiles as C:

~/c/tests>gcc const.c
const.c: In function `main':
const.c:6: warning: passing arg 1 of `foo' from incompatible pointer type


I believe this warning to be wrong.

Regards,

-- 
 Carlo Wood  <carlo@runaway.xs4all.nl>


==========

PS I use egcs-1.1.1 release.
   binutils-2.9.1.0.15-1

~/c/tests>gcc -v -Wall -pedantic const.c
Reading specs from /usr/local/egcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/sp
ecs
gcc version egcs-2.91.60 19981201 (egcs-1.1.1 release)
 /usr/local/egcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/cpp -lang-c -v -unde
f -D__GNUC__=2 -D__GNUC_MINOR__=91 -D__ELF__ -Dunix -Di386 -D__i386__ -Dlinux -D
__ELF__ -D__unix__ -D__i386__ -D__i386__ -D__linux__ -D__unix -D__i386 -D__linux
 -Asystem(posix) -Wall -pedantic -Asystem(unix) -Acpu(i386) -Amachine(i386) -Di3
86 -D__i386 -D__i386__ -Di686 -Dpentiumpro -D__i686 -D__i686__ -D__pentiumpro -D
__pentiumpro__ const.c /tmp/ccSqROlP.i
GNU CPP version egcs-2.91.60 19981201 (egcs-1.1.1 release) (i386 Linux/ELF)
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/local/egcs/i686-pc-linux-gnu/include
 /usr/local/egcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/include
 /usr/include
End of search list.
 /usr/local/egcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/cc1 /tmp/ccSqROlP.i
-quiet -dumpbase const.c -Wall -pedantic -version -o /tmp/ccWcxDVA.s
GNU C version egcs-2.91.60 19981201 (egcs-1.1.1 release) (i686-pc-linux-gnu) com
piled by GNU C version egcs-2.91.57 19980901 (egcs-1.1 release).
const.c: In function `main':
const.c:6: warning: passing arg 1 of `foo' from incompatible pointer type
 as -V -Qy -o /tmp/ccCQg9cq.o /tmp/ccWcxDVA.s
GNU assembler version 2.9.1 (i686-pc-linux-gnu), using BFD version 2.9.1.0.15
 /usr/local/egcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/collect2 -m elf_i386
 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /usr/lib/crti.o /usr/local/e
gcs/lib/gcc-lib/i686-pc-linux-gnu/egcs-2.91.60/crtbegin.o -L/usr/local/egcs/lib/
gcc-lib/i686-pc-linux-gnu/egcs-2.91.60 -L/usr/local/egcs/i686-pc-linux-gnu/lib -
L/usr/local/egcs/lib /tmp/ccCQg9cq.o -lgcc -lc -lgcc /usr/local/egcs/lib/gcc-lib
/i686-pc-linux-gnu/egcs-2.91.60/crtend.o /usr/lib/crtn.o

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