I just tried to compile package tkimg-1.3-35 with the Intel C compiler.

It said

1.

bmp.c(450): warning #175: subscript out of range
bmp.c(451): warning #175: subscript out of range

The source code is

                x += rleBuf[2];
                y += rleBuf[3];

but

        unsigned char rleBuf[2];

Suggest code rework.

2.

ps.c(174): warning #175: subscript out of range

The source code is

    unsigned char buf[41];

	/* ... */

	buf[41] = 0;

Suggest code rework.

3.

tiff.c(564): warning #592: variable "bl" is used before its value is set

The source code is

	unsigned char *pixelPtr = block.pixelPtr;

Suggest initialise local variable "bl" before first use.