Upstream Cygwin does build their gcc with posix threads for ages,
at least since gcc4-4.5.1-1.cygport (committed on Oct 3, 2010).
---
eclass/toolchain.eclass | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass
index 4b94f78bfa9..aa62010be6e 100644
--- a/eclass/toolchain.eclass
+++ b/eclass/toolchain.eclass
@@ -1034,7 +1034,7 @@ toolchain_src_configure() {
confgcc+=( --enable-shared )
fi
case ${CHOST} in
- mingw*|*-mingw*|*-cygwin)
+ mingw*|*-mingw*)
confgcc+=( --enable-threads=win32 ) ;;
*)
confgcc+=( --enable-threads=posix ) ;;
--
2.16.1