I was not able to reproduce any warning in compiling wpng.c using gcc
4.4.1-3ubuntu3 on karmic x86_64.
The fail line reported is:
[...]
279 if ((wpng_info.infile = fdopen(fileno(stdin), "rb")) == NULL) {
[...]
and personally I do not find errors in it.
The source file correctly includes stdio.h for prototypes:
typedef struct _IO_FILE FILE;
extern struct _IO_FILE *stdin;
FILE *fdopen(int fd, const char *mode);
int fileno(FILE *stream);
So we have an int coming from a call to fileno with the correct FILE
structure pointer argument as input to the fdopen function which expects
an integer. And gcc with -wall -pedantic does not report any error. Need
to know which compiler version is used in the automatic test above.
--
fileno implicitly converted to pointer
https://bugs.launchpad.net/bugs/402174
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