Fix handling of parentheses in macro argument values

As an oversight, there was no check for nested parentheses in macro
arguments, making the preprocessor think the call ended after 'void)' in

    def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)

This broke the latest linux-next kernels, starting with commit
eb111869301e1 ("compiler-types.h: add asm_inline definition").

I remember seeing this when going through the C code, but somehow forgot
to put it in. Fix it, and clean up _expand_macro() a bit at the same
time.

Fixes: #76

0 files changed, 0 insertions, 0 deletions