https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31782
--- Comment #8 from Raphaƫl JAKSE <raphael.jakse at gmail dot com> --- I tried call "$" instead of call ($) With gcc -S, I got : t.s: Assembler messages: t.s:30: Error: invalid character `"' before operand 1 I don't know if there is a way to use quoting (" ") instead of parenthesizing).