On 25/05/18 05:41, 李刚 wrote: > Hello GCC > > > > > I have some question about gcc when compile large C file. I have a > 2G C file .When compile, cannot finish. > > > > > how large C file the GCC support ? 100M? 500M? 1G? > > When compile large C file ,is there any gcc option? > > In theory, if you have a 64-bit build of gcc there should be no specific limit. But in practice it is going to depend a great deal on the sort of thing you have in the C file, and the kinds of options you have. Some aspects of C compilation scale linearly - so a 2 GB file will compile like 1,000 separate 2 MB files. But other aspects are non-linear in either time or memory space. Then the 2 GB file is perhaps like 1,000,000 separate 2 MB files. So there is no easy answer to your question. Have you done any timings with smaller files, to see how the time grows with the size of the code? And have you made sure your host computer has enough memory? Give some details of the gcc build (compiler version, 32-bit or 64-bit, host OS, compiler flags) and some information about the source code file (what sort of thing is in the file), and maybe people can give some suggestions. I am rather curious as to what you have in your C file. I am assuming it is not a manually written file! Is it something like a generated simulation for FPGA/ASIC design? Have you looked at how you might be able to split it up into separate files? As well as helping compilation, that could allow you to make more efficient results (as you will be able to use more optimisation on smaller files).
