[Bug c/37267] New: #pragma inside structure initialization causes error

[neale at sinenomine dot net]

We’ve implemented the #pragma ident which simply generates information in the
comment section of an elf object. Solaris uses it throughout its source tree.
However, it’s causing some grief when used in a manner like this:

#include <stdio.h>

typedef struct X {
        int a;
        int b;
} X_t;

int z;

X_t x[] = {
#pragma weak Y = z
{0,1},
{2,3}
};

int 
main(int argc, char **argv) 
{
        printf("%x",x[0].a);
        return x[1].b;
}


I’ve replaced ident with weak so it will run on other platforms. For gcc 4.0.1
there’s no problem but with 4.2.3 I get the following:

/tmp/test.c:11: error: expected expression before '#pragma'

The context in which I am seeing a problem is that the C code does something
like this:

tuple_t x[] = {
#include “a.h”
#include “b.h”
};

Each of the ‘.h’ files have the contents of the structure but they also contain
a #pragma ident which causes the compiler to emit the error.

Neale


-- 
           Summary: #pragma inside structure initialization causes error
           Product: gcc
           Version: 4.2.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: neale at sinenomine dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37267