On: Ruby 2.0.0-preview2 released

[mitchty]

Anyone else getting compile errors with the latest clang on mountain lion?

num2int.c:82:21: error: expected ')'

    sprintf(buf, "%"PRI_LL_PREFIX"d", NUM2LL(num));

                    ^

[ajasmin → mitchty]

Is that even valid C code?

[emillon → ajasmin]

Yes, if PRI_LL_PREFIX expands to a string literal, the literals get merged together.

[cremno → emillon]

Ruby supports this too but it will be removed in the future (3.0). The preview doesn't show a warning but 2.0 will.

Source: https://bugs.ruby-lang.org/issues/6265

Btw, PRI_LL_PREFIX is defined in Ruby's config.h.

[rwmj → ajasmin]

Not as written, but it's possible that PRI_LL_PREFIX is some sort of macro expanding to a string (similar to PRIi64 which is standard C).