C preprocessor failure

[Stephen Olsen <Stephen_Olsen at mentorg dot com>]

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>
> GNU compiler bugs,
>
> The command is:  gcc -Wall -c -o prefail.o prefail.c
>
> Inside an #ifdef that should not be included after preprocessing,
> there are some \ characters escaping " characters.  The preprocessor
> should ignore them but it fails with the error message:
>
>     prefail.c:15: unterminated string or character constant
>     prefail.c:11: possible real start of unterminated constant
>     prefail.c:10: unterminated `#if' conditional
>
> Here is the file that fails with gcc It works on either sparc solaris or
>
> x86 linux redhat release 6.2.
>
> It is version egcs-2.91.66 native x86 and 2.95.2 for Mips cross compiler
>
> under solaris.
>
> Sincerely,
>
> Stephen Olsen
>
> This one should work on both:
>
> Here is the file:
>
> #include <stdio.h>
>
> int main()
> {
>         printf("Hello world\n");
>
> /* hmmm why does this preprocessor directive not work here??? */
> /* I think it is the \ character */
>
> #ifdef DO_NOT_PROCESS
> <input type=\"text\" name=\"designation\">vendor description
>
> #endif
>
>         printf("Goodbye world\n");
>         return (0);
> }
> /***** ENDOFFILE******/
>
> This one should pass on one host and fail on the other.
>
> file2:
> #include <stdio.h>
>
> int main()
> {
>         printf("Hello world\n");
>
> /* hmmm why does this preprocessor directive not work here??? */
> /* I think it is the \ character */
>
> /*
> <input type=\"text\" name=\"designation\">vendor description
>
> */
>
>         printf("Goodbye world\n");
>         return (0);
> }
> /*****ENDOFFILE*****/