warnings in imcc/imcparser.c (statement with no effect)

[jgabr]

While building on Mac OS X 10.5.8:

compilers/imcc/imcparser.c
compilers/imcc/imcparser.c: In function ‘yyparse’:
compilers/imcc/imcparser.c:3091: warning: statement with no effect
compilers/imcc/imcparser.c:5229: warning: statement with no effect
compilers/imcc/imcparser.c:5386: warning: statement with no effect
compilers/imcc/imcparser.c:5390: warning: statement with no effect

[kjs]

These warnings are there on windows and linux as well. They warn about some generated code: the bison-generated boilerplate code. (compilers/pirc has them as well)

On windows you can set some #pragmas to silent these warnings (that is,using MSVC), but otherwise you cannot.

I would suggest "won't fix". Perhaps a bug report to the bison project, requesting that this be cleaned up. Patching bison-generated code would be too tricky/maintenance nightmarish.

--kjs

[chromatic]

This problem is indeed in bison; it's the declaration of the YYSTACK_FREE macro. Unfortunately, the code there attempts to suppress this warning, but it apparently does not work with the current version of GCC and the warning flags we have available.