[gdal-dev] assert failure (tif_open)

[Nik Sands]

Hi list members,

I've been using GDAL 1.10 as a statically linked library in an iOS app for some time.  I recently recompiled GDAL again from the same local set of source files, using my notes on configuration options that I used last time, and ever since I've been having a problem every time the app attempts to open an image file.

The app fails an assert() in the included tiff library (in tif_open.c), throwing the error:

	Assertion failed: (sizeof(uint64)==8), function TIFFClientOpen, file tif_open.c, line 99.

The line in question is the last line of the code snippet from tif_open.c below:

	/* The following are configuration checks. They should be redundant, but should not
	 * compile to any actual code in an optimised release build anyway. If any of them
	 * fail, (makefile-based or other) configuration is not correct */
	assert(sizeof(uint8)==1);
	assert(sizeof(int8)==1);
	assert(sizeof(uint16)==2);
	assert(sizeof(int16)==2);
	assert(sizeof(uint32)==4);
	assert(sizeof(int32)==4);
	assert(sizeof(uint64)==8);  //  <- SIBABRT HERE

The comments indicate that there may be a problem with the "configure" options I used when building GDAL, however I'm using exactly the same options (copy and pasted) as I used last time when it worked OK.

So this leads me to think that perhaps something has changed in my environment, and the only thing I can think of is that I may be using a different version of GCC (I'm using the 'gcc' included with Apple's 'Xcode' IDE, and since the last compile of GDAL, I've upgraded from a beta build of Xcode to the production build of Xcode 5).

I've tried it with GDAL 1.10.1 as well and get exactly the same problem.

I'm stumped as to how to proceed with resolving this issue.  Can anybody help me to overcome this?

Note that the problem occurs when running on the real iOS device (armv7s) and on the iOS simulator (i386).

Cheers,
Nik.