On Thu, 19 Dec 2024, Georg-Johann Lay wrote: > This patch adds a new target hook that allows the backend to asm output > a variable definition in its own way. This hook is needed because > varasm.cc imposes a very restrictive layout for all variable definitions > which will be basically ELF style (on ELF targets as least). To date, > there is no way for a backend to output a variable definition in a > different way. > > This hook is required by the avr backend when it outputs definitions > for variables defined with the "io", "io_low" or "address" attribute > that don't follow ELF style. These attributes are basically symbol > definitions of the form > > .global var_io > var_io = 32 > > with some additional assertions. > > The avr part that uses TARGET_ASM_VARIABLE is patch part 2/2.
GCC terminology mixup: the example defines a *symbol*, not a variable. IIUC, you use it in 2/2 for output of *declarations*. (As is, people may not find it when looking for what it does, or may think it does something else.) wheel.) brgds, H-P
