GNU linker script - how to automatically distribute code to multiple dis-contiguous sections

Question

I'm modifying an existing .ld and I have two flash sections for the code. These two flash sections are not contiguous so I cannot merely extend the definition of one of the sections to include the other.

Currently all of the code can fit in sec1 but if I turn off space optimizations, it doesn't fit.

QUESTION

How do I write the .ld to say place as much of the code as will fit in sec1 and then as much as will fit in sec2 and then ... sec3... etc?

I know how to place specific .obj in specific section but that's not what I want because I'll need to constantly modify the .ld as my code changes.