Using https://thinkingeek.com/gcc-tiny/ as a model, I've begun adding a
new language to gcc. I'm having trouble controlling how Bison is
invoked.
In my Make-lang.in, I have
YACC = bison
YFLAGS = -Werror --debug --verbose
but when I build, I see bison invoked on my .y file as
$ bison -y -Werror --debug --verbose
Where did that "-y" come from? The documentation
https://gcc.gnu.org/onlinedocs/gccint/Front-End-Makefile.html#Front-End-Makefile
says:
"It contains targets lang.hook ... and any
other Makefile rules required to build those targets...."
It doesn't say I can't use YACC = bison ....
This was under the radar until an upgraded bison began flagging
%empty as non-posix.
The observed behavior looked to me to be in error. How is the
language-specific directory supposed to control the value of YACC?
--jkl
