#elseif and #ifdef funnies

[Alex Buell <alex dot buell at tahallah dot demon dot co dot uk>]

I just stumbled across something strange with the #elseif and #elif
pragmas tonight. Here's a program snippet:

#include <stdio.h>

/* #define one */
#define two 1

int main(int argc, char *argv[])
{

#if defined(one)
	printf("One found\n");
#elif defined(two)
	printf("Two found\n");
#else
	printf("One and two not found\n");
#endif

	return 0;
}

This works, produces the expected output 'Two found'. However, if I do a
s/elif/elseif, and compile it, the output is wrong, it prints 'One and two
found'.

I was under the impression that #elseif and #elif were functionally the
same. Is this not true?

Gcc is 2.95.3, on sparc32-linux, with binutils 2.10.1.

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