highlight preprocessor DEBUG blocks

I want to highlight everything between #ifdef DEBUG and #endif

I tried this:

syntax match DEBUG /#ifdef DEBUG.*?#endif/
hi DEBUG ctermfg=green ctermbg=white

But it doesn't highlight the DEBUG blocks开发者_StackOverflow社区. Any ideas?

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You have to use region instead of match like this:

syntax region DEBUG start=/#ifdef DEBUG/ end=/#endif/

^{The relevant help files are syn-match and syn-region.}