[SoX-users] sox 14.0.1: fseeko issue

[Cristi C. <cri...@ya...>]

Hi,

I made some investigations regarding the problem with .wavfiles processing ending up with the error message "Could not find datachunk".
Bellow is the environment configuration I've used:
    gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)
    Red Hat Enterprise Linux ES release 4 (Nahant Update 3) running on 32-bit architecture
    Kernel  2.6.21.1

SoX is trying to use 64 bit offset values through "#define _FILE_OFFSET_BITS 64".
The issue applies only for a C program when the offset parameter is given as off_t type.
It seems like the gcc compiler does not bind fseeko to the fseeko64 function implementation.
Note that it works OK for a similar CPP program (g++ is used instead of gcc).

In order to fix the issue, we have to use "#define _LARGEFILE_SOURCE".
The SoX configure script already performs a test for deciding whether to use or not
this definition, but the final answer is "no":
"checking for _LARGEFILE_SOURCE value needed for large files... no"
Any ideas on what does the test consist of and how can it be improved?

Trying to use CLFAGS=-D_LARGEFILE_SOURCE as an argument to configure does not solve
the problem because the environment variable is never used during the compilation process.
Could that be a bug in the configure script? Note that I've tried to use also the 
"export CLFAGS=-D_LARGEFILE_SOURCE" before running the configure script, but I've got
the same result.

The workarround is to manually modify the src/soxconfig.h file generated after running configure:

/* Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2). */
#define _LARGEFILE_SOURCE 1

Best regards,
Cristian



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