gem install bool is broken

[tom025]

gem install bool -v 1.0.20 fails with ruby version 2.1.5 on Mac OS 10.10

Install output

======= compiling with clang
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling ast.c
compiling ext.c
compiling lexer.c
lexer.c:74:18: error: unused variable 'lexer_first_final' [-Werror,-Wunused-const-variable]
static const int lexer_first_final = 3;
                 ^
lexer.c:76:18: error: unused variable 'lexer_en_main' [-Werror,-Wunused-const-variable]
static const int lexer_en_main = 3;
                 ^
2 errors generated.
make: *** [lexer.o] Error 1

make failed, exit code 2

This happens when using either clang or gcc-4.8.

This can be overcome simply by appending the install command with -- -with-cflags=-w to ignore unused constants when compiling the gem.

I am not sure how to fix this myself without just removing the flag from ruby/ext/bool_ext/extconf.rb.

[aslakhellesoy]

Thanks @tom025. The purpose of this lib was to prototype a new architecture for Gherkin. It looks like we're going to use a different approach (see the gherkin3 repo) so we might not even use bool. If we decide to ditch bool I'd still like to have a simple parser that can parse boolean expressions for tags, but we can do that with something much simpler.