On 10/01/13 13:38, Anup Kini wrote:

Hi Matthew,

Thanks for the reply.

I tried with VERBOSE=1 command and the virtual memory has been exhausted.
I check for the free space and its around 5.3 GB.

Let me know if there is any additional compiler tags i can use to free up
or use less memory.
I looked into the forums and found that similar issues were faced with 4.4
and 4.5 release but they were all baselined to 4.6.

GCC --version = gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

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*cd /home/linaro/flann/flann-1.8.3-src/build/src/cpp && /usr/bin/c++

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*/home/linaro/flann/flann-1.8.3-src/src/cpp/flann/util/logger.h:73:9: note:

the mangling of ‘va_list’ has changed in GCC 4.4
virtual memory exhausted: Cannot allocate memory

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linaro@linaro-ubuntu-desktop:~/flann/flann-1.8.3-src/build$


When i run it on my laptop it does not require more than 300 mb to compile.

I am not sure what the problem is on my board (ZNQ ZC702). It has an SD
Card with 7.4 gb for the filesystem and 5.3 GB is free.

That 5.3GB won't be used for virtual memory unless you create a swap partition.  To find out how much memory your board has (assuming you are running Linux on it use the 'free' command.

If your board has significantly more than 300MB available then can you please raise a bug report in Launchpad.  I don't think we will get this fixed in 4.6 - but it is a good test case to check memory usage in 4.8.

The difference in memory usage between x86 and ARM can be down to the different targets being compiled for requiring different code generation strategies.

As for working round the issue - my suggestion is either:
 a) Use a cross compiler (so build on x86 targetting ARM); or
 b) split the source file into many smaller files.

Thanks,

Matt


--
Matthew Gretton-Dann
Toolchain Working Group, Linaro