How to allocate more memory for your program (GCC)

Question

I want to allocate more memory for the program. What is the gcc flag that allows this to be done?

FYI, what I'm trying to do is create a very large matrix (very large), which will later go through compression algorithms. Therefore, I cannot avoid creating such a large matrix for storing data.

Answer 1

Your question is very unclear, but I suspect that you are trying to create a large multidimensional array (matrix) as a local variable (auto variable) for some function (possibly the main one), and this does not work.

int foo(int boo, int doo) {
    int big_array[REALLY_BIG];
    ...

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Answer 2

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Answer 3

gcc-.

malloc .

If you are somehow forced to use a static array or if your environment is configured by default to restrict your program’s access to virtual memory, you may need a command ulimit.

ulimit -v unlimited
ulimit -d unlimited

Otherwise, you need to more clearly indicate the error you are getting, which prevents you from getting enough memory and probably also tell us how big your matrix is.

Answer 4

Use a bunch! malloc()and friends are your friends.