Re: [Mingw-users] Out of memory for cc1plus

[Edward D. <eld...@tr...>]

On 12/24/2014 9:13 PM, asmwarrior wrote:
> On 2014-12-25 9:31, Edward Diener wrote:
>> I could report this on the gcc bugzilla tracker but reproducing it using
>> my VMD library, although it is public on Github, will be fairly
>> complicated task ( the latest modular Boost must also be downloaded and
>> setup from Github ) for whomever handles the bug. I was hoping this sort
>> of problem, based on what seems to me to be a large-scale memory leak,
>> would be known for these later versions of gcc and I could find a
>> workaround.
>
> I think this bug is already reported, see here:
> Bug 56926 – Crash (without ICE) while compiling Boost.Math -
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56926

Thanks. My issue is not a PCH problem as reported by the above bug.

But the report did suggest what might be causing the problem in 
gcc-4.8.1 and above. In my library I do have headers that include each 
other, because of macro recursion techniques, and this may be causing 
gcc-4.8.1 to erroneously allocating memory continuously for some reason. 
I will put some pre-guards of the form of:

#if !defined(SOME_FILE_HEADER_MACRO)
#include <some_file.hpp>
#endif

and see if that fixes gcc-4.8.1 and above.

Of course I have header guards on all header files but evidently that is 
not enough to unconfuse gcc.

It is definitely some problem in the compiler. If I report it I will 
have to describe how to duplicate it, and that will take some time for 
me to write up. I know gcc is free, thankfully, and I appreciate all 
those who work on it, but having a regression like this is dismaying.

>
> This is the reason I still use 4.7.x version of GCC under Windows.

I write Boost code and it is necessary to support the latest/greatest as 
many people use the latest gcc for it C++11/C++14 features.