[Bug preprocessor/17299] New: Strange "not give a valid preprocessing token" error with macro substitution

["sestegra at free dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

GCC 3.3.2 raises a strange preproccessing error with following C file (dummy.c) 
and fails to compile. 
Shown error is "pasting "(" and "B" does not give a valid preprocessing token". 
 
On the other hand, GCC 2.96 only raises a warning (strange too), but it rightly 
compiles. 
 
dummy.c 
>#define F(N) A##N 
>#define X(O,N) F(##O##N) 
> 
>int X(B,C); 
> 
>int main(void) { 
>  X(B,C) = 3.14; 
> 
>  return ABC; 
>} 
 
$>gcc-3.3.2 -v -save-temps dummy.c 
Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.3.2/specs 
Configured with: ../configure --prefix=/usr --libdir=/usr/lib 
--with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info 
--enable-shared --enable-threads=posix --disable-checking --enable-long-long 
--enable-__cxa_atexit --enable-clocale=gnu 
--enable-languages=c,c++,ada,f77,objc,java,pascal 
--host=i586-mandrake-linux-gnu --with-system-zlib 
Thread model: posix 
gcc version 3.3.2 (Mandrake Linux 10.0 3.3.2-6mdk) 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.3.2/cc1 -E -quiet -v -D__GNUC__=3 
-D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=2 dummy.c dummy.i 
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include" 
#include "..." search starts here: 
#include <...> search starts here: 
 /usr/local/include 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/3.3.2/include 
 /usr/include 
End of search list. 
dummy.c:4:10: pasting "(" and "B" does not give a valid preprocessing token 
dummy.c:7:8: pasting "(" and "B" does not give a valid preprocessing token 
 
dummy.i (GCC 3.3.2) 
># 1 "dummy.c" 
># 1 "<built-in>" 
># 1 "<command line>" 
># 1 "dummy.c" 
> 
> 
> 
>int ABC; 
> 
>int main(void) { 
>  ABC = 3.14; 
> 
>  return ABC; 
>} 
 
$>gcc-2.96 -v -save-temps dummy.c 
Reading specs from /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/specs 
gcc version 2.96 20000731 (Mandrake Linux 9.2 2.96-0.83mdk) 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/cpp0 -lang-c -v -D__GNUC__=2 
-D__GNUC_MINOR__=96 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ 
-D__unix__ -D__linux__ -D__unix -D__linux -Asystem(posix) -D__NO_INLINE__ 
-Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -D__tune_pentium__ 
dummy.c dummy.i 
GNU CPP version 2.96 20000731 (Mandrake Linux 9.2 2.96-0.83mdk) (cpplib) (i386 
Linux/ELF) 
ignoring nonexistent directory "/usr/i586-mandrake-linux-gnu/include" 
#include "..." search starts here: 
#include <...> search starts here: 
 /usr/local/include 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/include 
 /usr/include 
End of search list. 
dummy.c:4:5: warning: pasting "(" and "B" does not give a valid preprocessing 
token 
dummy.c:7:3: warning: pasting "(" and "B" does not give a valid preprocessing 
token 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/cc1 dummy.i -quiet -dumpbase 
dummy.c -version -o dummy.s 
GNU C version 2.96 20000731 (Mandrake Linux 9.2 2.96-0.83mdk) 
(i586-mandrake-linux-gnu) compiled by GNU C version 2.96 20000731 (Mandrake 
Linux 9.2 2.96-0.83mdk). 
 as -V -Qy -o dummy.o dummy.s 
GNU assembler version 2.14.90.0.7 (i586-mandrake-linux-gnu) using BFD version 
2.14.90.0.7 20031029 
 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/collect2 -m elf_i386 
-dynamic-linker /lib/ld-linux.so.2 /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/../../../crt1.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/../../../crti.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/crtbegin.o 
-L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96 
-L/usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/../../.. dummy.o -lgcc -lc 
-lgcc /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/crtend.o /usr/lib/gcc-lib/i586-mandrake-linux-gnu/2.96/../../../crtn.o 
 
dummy.i (GCC 2.96) 
># 4 "dummy.c" 
>int ABC; 
> 
>int main(void) { 
>  ABC = 3.14; 
> 
>  return ABC; 
>}

-- 
           Summary: Strange "not give a valid preprocessing token" error
                    with macro substitution
           Product: gcc
           Version: 3.3.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sestegra at free dot fr
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17299