A quicky and dirty solution would be, edit your bin\gsc-cc-o.bat file as not to include that compilation option anymore.<div><br></div><div>Secondarily, for debug, you can turn on the GAMBC_CC_VERBOSE environment option as to get echoed to you the actual C compiler command line invoked by Gambit.</div>

<div><br></div><div>Did this work around it?</div><div><br><br><div class="gmail_quote">2013/1/11 Sunao Furukawa <span dir="ltr">&lt;<a href="mailto:sadie@kind.ocn.ne.jp" target="_blank">sadie@kind.ocn.ne.jp</a>&gt;</span><br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello everyone!<br>
It is nice to meet you!<br>
<br>
I installed gambit.<br>
So,I compiled .scm file.<br>
But, I failed it.<br>
Error message:<br>
C:\Users\?\Desktop&gt;gsc myeval-myapply1.scm<br>
gcc: error: unrecognized command line option &#39;-mno-cygwin&#39;<br>
<br>
I download gambit of Windows installer MinGW version 4.6.6.<br>
MinGW is mingw-get-inst-20120426.exe.<br>
<br>
myeval-myapply1.scm is SICP 4.1.4 improved for R5RS.<br>
<br>
I can not understand why gsc emitted &quot;gcc: error: unrecognized command<br>
line option &#39;-mno-cygwin&#39;&quot;.<br>
Please give me your help.<br>
<br>
Thanks.<br>
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</blockquote></div><br></div>