Bug #2587

Forced definition of struct timezone under MinGW

Added by luislavena (Luis Lavena) over 8 years ago. Updated about 7 years ago.

Target version:
ruby -v:
ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-mingw32]


It appears that win32.h is forcing the definition of timezone structure, even when it has been defined by MinGW provided headers.

The output from compilation of miniruby:

In file included from ../include/ruby/defines.h:205:0,
from ../include/ruby/ruby.h:73,
from ../include/ruby.h:32,
from ../main.c:13:
../include/ruby/win32.h:201:8: error: redefinition of 'struct timezone'

And the code that defines it:

#ifdef MINGW32
struct timezone {
int tz_minuteswest;
int tz_dsttime;
#undef isascii
#define isascii __isascii

It is clear that this was made to workaround limitations of older versions of MinGW, but a simple check with AC_CHECK_TYPES (or if specific are needed: AC_CHECK_MEMBERS), any of those could provide the defines needed to avoid the forced redefinition.

Please find attached a naive patch for and win32.h that use HAVE_STRUCT_TIMEZONE

Thank you.

Related issues

Related to Backport187 - Backport #3666: Backport of r26311 (Bug #2587)Closed2010-08-08


#1 Updated by rogerdpack (Roger Pack) over 8 years ago

is this a cross compile? Which version of gcc?

#2 Updated by luislavena (Luis Lavena) over 8 years ago


No cross-compiler, native.

Timezone is part of the newer w32api packages for MinGW. Will grab the versions and follow once I have the computer around.



#3 Updated by nobu (Nobuyoshi Nakada) over 8 years ago

  • Status changed from Open to Closed
  • % Done changed from 0 to 100

This issue was solved with changeset r26311.
Luis, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.


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