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From: Denis Excoffier <cygwin AT Denis-Excoffier DOT org>
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Date: Fri, 11 Jan 2013 22:47:17 +0100
Subject: XOPEN_SOURCE and strings.h
To: cygwin AT cygwin DOT com
Message-Id: <DB6397CD-79A6-428E-9B08-15365DC7BCF4@Denis-Excoffier.org>
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Hello,

In order to compile some packages (including slang-2.2.4 and ccrypt-1.9)
with GCC-4.7.2, i had to patch /usr/include/string.h iaw the following:


diff -uNr x-o/usr/include/string.h x-p/usr/include/string.h
--- x-o/usr/include/string.h	2012-11-23 14:40:09.000000000 +0100
+++ x-p/usr/include/string.h	2013-01-11 22:29:39.000000000 +0100
@@ -64,13 +64,13 @@
 char	*_EXFUN(strcasestr,(const char *, const char *));
 char 	*_EXFUN(strchrnul,(const char *, int));
 #endif
-#if !defined(__STRICT_ANSI__) || (_XOPEN_SOURCE >= 500)
+#if !defined(__STRICT_ANSI__) || ((_XOPEN_SOURCE - 0) >= 500)
 char 	*_EXFUN(strdup,(const char *));
 #endif
 #ifndef __STRICT_ANSI__
 char 	*_EXFUN(_strdup_r,(struct _reent *, const char *));
 #endif
-#if !defined(__STRICT_ANSI__) || (_XOPEN_SOURCE >= 700)
+#if !defined(__STRICT_ANSI__) || ((_XOPEN_SOURCE - 0) >= 700)
 char 	*_EXFUN(strndup,(const char *, size_t));
 #endif
 #ifndef __STRICT_ANSI__



See also /usr/include/sys/features.h.

Otherwise i obtain the message:

/usr/include/string.h:67:49: error: operator '>=' has no left operand
/usr/include/string.h:73:49: error: operator '>=' has no left operand

Hope this helps,

Regards,

Denis Excoffier.



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