Bug #13529: Warning when compiling io.c

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: -
• ruby -v: ruby 2.5.0dev (2017-05-01 trunk 58527) [x86_64-cygwin]
• Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN

[duerst (Martin Dürst)]

I get the warning below when trying to compile trunk on cygwin:

compiling io.c
io.c: In function ‘do_io_advise’:
io.c:8869:29: warning: format ‘%lld’ expects argument of type ‘long long int’, b                              ut argument 3 has type ‘off_t {aka long int}’ [-Wformat=]
  VALUE message = rb_sprintf("%"PRIsVALUE" "

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Feedback

How did you configure it?

I can't reproduce it, and rb_cv_off_t_convertible seems properly configured as LONG.

$ sed -i /off_t/d config.cache 

$ make reconfig | grep off_t
checking for off_t... yes
checking size of off_t... 8
checking for convertible type of off_t... LONG

$ grep off_t config.cache
ac_cv_sizeof_off_t=${ac_cv_sizeof_off_t=8}
ac_cv_type_off_t=${ac_cv_type_off_t=yes}
rb_cv_off_t_convertible=${rb_cv_off_t_convertible=LONG}

$ grep OFFT .ext/include/x86_64-cygwin/ruby/config.h 
#define OFFT2NUM(v) LONG2NUM(v)
#define NUM2OFFT(v) NUM2LONG(v)
#define PRI_OFFT_PREFIX PRI_LONG_PREFIX

$ rm io.o; make io.o
compiling ../src/io.c

[duerst (Martin Dürst)]

• Status changed from Feedback to Closed

This seems to have been a temporary issue. For the commands above, I get the same results now. Closing.