Use the OpenBSD header for ICU on OpenBSD

README.chromium

 Name: icu
 URL: http://site.icu-project.org/
 Version: 4.6
 
 Description:
 This directory contains the source code of ICU 4.6 for C/C++
 
 1. It was obtained with the following:
 
     $ svn export --native-eol LF http://source.icu-project.org/repos/icu/icu/tags/release-4-6 icu46
 
-2. Platform header files for Linux, FreeBSD, and Mac OS X:
+2. Platform header files for Linux, FreeBSD, OpenBSD  and Mac OS X:
 
    - Apply platform.patch in patches directory. : It applies the upstream
      patch to platform.h.in (see http://bugs.icu-project.org/trac/ticket/8248)
      and change source/common/unicode/ptypes.h to refer to plinux.h and
      pmac.h generated below.
 
    - 'runConfigureICU Linux', 'runConfigureICU FreeBSD', and
      'runConfigureICU MacOSX' are run to generate
      source/common/unicode/platform.h.
 
-   - Rename it to 'plinux.h', 'pfreebsd.h', and 'pmac.h'
+   - On OpenBSD, source/common/unicode/platform.h is being generated
+     by the icu4c port in the ports directory and not by runConfigureICU.
+     In case the file has to be updated you can do:
+     cd /home/ports/textproc/icu4c && make configure
+
+   - Rename it to 'plinux.h', 'pfreebsd.h', 'popenbsd.h' and 'pmac.h'
 
    - Apply patches/pmach.h.patch on Mac to pmac.h
 
 3. The following directories were removed because they're not used by Chromium
    at the moment:
    as_is
    packaging
    source/extra
    source/sample
    source/layout
@@ skipping 132 matching lines @@
   - patches/regex.patch
   - upstream bug: http://bugs.icu-project.org/trac/ticket/8666 (fixed in the upstream)
 
 16. Apply the upstream patch for Korean search collator support (ICU 4.6.1).
    - patches/search_collation.patch
    - upstream bug: http://bugs.icu-project.org/trac/ticket/8290
 
 17. Fix a use of uninitialized memory bug in regular expression matching
    - patches/rematch.patch
    - upstream bug: http://bugs.icu-project.org/trac/ticket/8824