C strstr function returns int or char *?

[Brian May <bam@debian.org>]

>From the info page:

Function: char * strstr (const char *HAYSTACK, const char *NEEDLE)


>From /usr/include/string.h:

extern char *strstr __P ((__const char *__haystack, __const char *__needle));


While compiling:

char *a = strstr("hello", "ccache=");


Warning:

pam_krb5_auth.c:287: warning: initialization makes pointer from integer without a cast


So, why is an integer expected??????
-- 
Brian May <bam@debian.org>