Problems with Io Addons under Cygwin

Has anybody managed to use Io addons like Regex or OpenGL under Cygwin on Windows 7 32 bit?

Notes:

• If it happen to be an ASLR issue, I want to keep ASLR enabled, so I did not test with it turned off.
• My Cygwin is a newer one, but not neccessarily bleading edge (gcc (GCC) 4.3.4 20090804 (release) 1)

The full story:

At my side I need some tweaks to compile and run Io under Cygwin. To see my build process, minor patches and final tweaks to make the DLLs available to Cygwin see http://permalink.de/tino/iocyg

My OS is Windows 7 starter 32 bit, so ASLR is enabled. This here is about builds under Cygwin, not MinGW, as under MinGW the Regex addon does not compile anyway due to missing pcre lib by default.

Under Cygwin I did not manage to use some Addons like Regex or OpenGL yet because of following error (note that Cygwin looks for DLLs in the search PATH, so I must add the lib to it, hence the env):

$ env PATH="$PATH:/usr/local/lib" io
Io 20090105
Io> Regex
==>  Regex_0xcd1788:
   [output skipped]
Io> "e" matchesRegex("." asRegex)
IoState error: missing proto 0x52128c
IoState_protoWithInitFunction() Error: missing proto

Googling for this error I found some posts relating to the fact, that Io uses the function pointer as hash to set th开发者_StackOverflowe proto. This address might change in a DLL situation so the hash breaks. However looking into the code of iovm/source/IoState.c I am not able to understand if this really is the source of the problem or not (yet).

Going deeper into this:

Io> "a" matchesOfRegex("o") anchored
==> nil
Io> "a" matchesOfRegex(".") anchored
IoState error: missing proto 0x1983128c
IoState_protoWithInitFunction() Error: missing proto

This can be tracked down to the use of Range addon in function IoRegexMatches_searchFrom_withOptions_ from Regex/source/IoRegexMatches.c. And here I am currently stuck.

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Yes, Regex gave me problems until I installed pcre.

Fix:

1. Install pcre.
2. Recompile Io.