Index: lmdb/build.sh
==================================================================
--- lmdb/build.sh
+++ lmdb/build.sh
@@ -6,10 +6,29 @@
 url="https://github.com/ray2501/tcl-lmdb/archive/${version}.tar.gz"
 sha256='d19a19376da6716a1ed159a918e631030491f8b6a4ef9e72a4221481b24b2e40'
 
 function postinstall() {
 	local name
+	local isWindows
+
+	# Windows-only
+	isWindows='false'
+	if [ "${KC_CROSSCOMPILE}" = '1' ]; then
+		case "${KC_CROSSCOMPILE_HOST_OS}" in
+			*-cygwin|*-mingw32|*-mingw32-*|*-cygwin-*)
+				isWindows='true'
+				;;
+		esac
+	else
+		case "${OSTYPE}" in
+			msys|win*|cygwin)
+				isWindows='true'
+				;;
+		esac
+	fi
 
-	find "${installdir}" -type -f -name '*.a' | while IFS='' read -r name; do
-		echo '-lntdll' > "${name}.linkadd"
-	done
+	if [ "${isWindows}" = 'true' ]; then
+		find "${installdir}" -type -f -name '*.a' | while IFS='' read -r name; do
+			echo '-lntdll' > "${name}.linkadd"
+		done
+	fi
 }

ADDED   lmdb/patches/tcl-lmdb-0.4.0-fixrobust.diff
Index: lmdb/patches/tcl-lmdb-0.4.0-fixrobust.diff
==================================================================
--- /dev/null
+++ lmdb/patches/tcl-lmdb-0.4.0-fixrobust.diff
@@ -0,0 +1,21 @@
+diff --no-dereference -uNr tcl_lmdb-0.4.0.orig/Makefile.in tcl_lmdb-0.4.0-fixrobust/Makefile.in
+--- tcl_lmdb-0.4.0.orig/Makefile.in	2018-06-22 10:17:46.000000000 -0500
++++ tcl_lmdb-0.4.0-fixrobust/Makefile.in	2019-01-22 15:51:11.244784351 -0600
+@@ -149,17 +149,6 @@
+ 
+ PKG_CFLAGS	= @PKG_CFLAGS@
+ 
+-# Workaround for glibc pthread robust mutex support (glibc < 2.12) fix
+-ifneq ("$(OS)","Windows_NT")
+-UNAME_S := $(shell uname -s)
+-ifeq ($(UNAME_S),Linux)
+-GLIBCCHECK := $(shell expr `ldd --version | grep ^ldd | sed 's/^.* //g'` \< 2.12)
+-ifeq "$(GLIBCCHECK)" "1"
+-        PKG_CFLAGS += -DMDB_USE_ROBUST=0
+-endif
+-endif
+-endif
+-
+ # TCL_DEFS is not strictly need here, but if you remove it, then you
+ # must make sure that configure.ac checks for the necessary components
+ # that your library may use.  TCL_DEFS can actually be a problem if