Issue #19732 has been updated by nobu (Nobuyoshi Nakada). Status changed from Feedback to Open Although I don't think it is a big issue as we don't assume or guarantee all our headers can be usable individually, welcome the improvement. It seems ruby/internal/event.h is which really needs `uint32_t`. ```shell-session $ clang -I/opt/local/include/ruby-3.3.0+0/{x86_64-darwin22/,} -include ruby/internal/event.h -c -o /dev/null -xc - < /dev/null In file included from <built-in>:1: /opt/local/include/ruby-3.3.0+0/ruby/internal/event.h:103:9: error: unknown type name 'uint32_t' typedef uint32_t rb_event_flag_t; ^ 1 error generated. ``` Also `HAVE_STDINT_H` is usable there. ```shell-session $ clang -I/opt/local/include/ruby-3.3.0+0/{x86_64-darwin22/,} -include ruby/internal/event.h -E -dM -xc - < /dev/null | grep HAVE_STDINT_H #define HAVE_STDINT_H 1 ``` So it would be nice to add the `include` with checking `HAVE_STDINT_H` in event.h file. ```diff diff --git a/include/ruby/internal/event.h b/include/ruby/internal/event.h index 04b137a1939..bbf0aa45019 100644 --- a/include/ruby/internal/event.h +++ b/include/ruby/internal/event.h @@ -23,6 +23,10 @@ #include "ruby/internal/dllexport.h" #include "ruby/internal/value.h" +#ifdef HAVE_STDINT_H +# include <stdint.h> +#endif + /* These macros are not enums because they are wider than int.*/ /** ``` ---------------------------------------- Bug #19732: Possible missing header (stdint.h) in event.h https://bugs.ruby-lang.org/issues/19732#change-103572 * Author: itarato (Peter Arato) * Status: Open * Priority: Normal * ruby -v: HEAD * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- Ruby's event.h (https://github.com/ruby/ruby/blob/813a5f4fc46a24ca1695d23c159250b9e1080ac7/i...) is using type aliases from stdint.h, however it's not directly included. An example where this causes issues is when using `rb_debug_inspector_current_depth()` https://github.com/ruby/ruby/blob/813a5f4fc46a24ca1695d23c159250b9e1080ac7/i.... In a gem using a C-extension that already includes `debug.h`, when adding the call `rb_debug_inspector_current_depth()`, the compilation fails with: ``` shell make compiling debug_inspector.c In file included from /home/itarato/.rubies/ruby-master/include/ruby-3.3.0+0/ruby/debug.h:16, from debug_inspector.c:12: /home/itarato/.rubies/ruby-master/include/ruby-3.3.0+0/ruby/internal/event.h:105:9: error: unknown type name ‘uint32_t’ 105 | typedef uint32_t rb_event_flag_t; | ^~~~~~~~ ``` This is on `ruby/ruby` latest commit (813a5f4fc46a24ca1695d23c159250b9e1080ac7), but also tried on tag 3.2 (same error). I've also proposed a fix: https://github.com/ruby/ruby/pull/7945 -- https://bugs.ruby-lang.org/