Le 11/05/2023 à 19:59, Enrico Forestieri a écrit :
Is this somthing special about cygwin or is our autoconf test broken?

The former, I think. This is what I get when comparing cygwin and native windows configuration:

$ diff -up build-cygwin/config.h build-win32/config.h | grep -B1 STD_STRING
  /* std::string uses copy-on-write */
-#define STD_STRING_USES_COW 1
+/* #undef STD_STRING_USES_COW */

So, cygwin is using COW in the std::string implementation...

Or our test is broken on cywin... I think the new thread-safe string type is required for C++11 compliance.

JMarc
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