vcpkg/ports/nettle/msvc-support.patch

diff --git a/Makefile.in b/Makefile.in
index 3194735..669bdfe 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -29,8 +29,9 @@ include config.make
 PRE_CPPFLAGS = -I.
 EXTRA_CFLAGS = $(CCPIC)
 
-LIBTARGETS = @IF_STATIC@ libnettle.a @IF_HOGWEED@ libhogweed.a
+LIBTARGETS = @IF_STATIC@ @LIBNETTLE_ARCHIVE@ @IF_HOGWEED@ @LIBHOGWEED_ARCHIVE@
 SHLIBTARGETS = @IF_SHARED@ $(LIBNETTLE_FORLINK) @IF_HOGWEED@ $(LIBHOGWEED_FORLINK)
+MSVC_TARGET = @MSVC_TARGET@
 
 getopt_SOURCES = getopt.c getopt1.c
 getopt_TARGETS = $(getopt_SOURCES:.c=.$(OBJEXT))
@@ -288,13 +289,13 @@ nettle_OBJS = $(nettle_SOURCES:.c=.$(OBJEXT)) \
 hogweed_OBJS = $(hogweed_SOURCES:.c=.$(OBJEXT)) \
 	       $(OPT_HOGWEED_OBJS) @IF_MINI_GMP@ mini-gmp.$(OBJEXT)
 
-libnettle.a: $(nettle_OBJS)
+@LIBNETTLE_ARCHIVE@: $(nettle_OBJS)
 	-rm -f $@
 	$(AR) $(ARFLAGS) $@ $(nettle_OBJS)
 	$(RANLIB) $@
 	echo nettle > libnettle.stamp
 
-libhogweed.a: $(hogweed_OBJS)
+@LIBHOGWEED_ARCHIVE@: $(hogweed_OBJS)
 	-rm -f $@
 	$(AR) $(ARFLAGS) $@ $(hogweed_OBJS)
 	$(RANLIB) $@
@@ -500,8 +501,8 @@ install-static: $(LIBTARGETS)
 	done
 
 install-dll-nettle:
-	$(MKDIR_P) $(DESTDIR)$(bindir)
-	$(INSTALL_DATA) $(LIBNETTLE_FORLINK) $(DESTDIR)$(bindir)/$(LIBNETTLE_FORLINK)
+	$(MKDIR_P) $(DESTDIR)$(libdir)/../bin
+	$(INSTALL_DATA) $(LIBNETTLE_FORLINK) $(DESTDIR)$(libdir)/../bin/$(LIBNETTLE_FORLINK)
 
 install-shared-nettle: $(LIBNETTLE_FORLINK) @IF_DLL@ install-dll-nettle
 	$(MKDIR_P) $(DESTDIR)$(libdir)
@@ -513,8 +514,8 @@ install-shared-nettle: $(LIBNETTLE_FORLINK) @IF_DLL@ install-dll-nettle
 		&& $(LN_S) $(LIBNETTLE_FILE) $(LIBNETTLE_FORLINK))
 
 install-dll-hogweed:
-	$(MKDIR_P) $(DESTDIR)$(bindir)
-	$(INSTALL_DATA) $(LIBHOGWEED_FORLINK) $(DESTDIR)$(bindir)/$(LIBHOGWEED_FORLINK)
+	$(MKDIR_P) $(DESTDIR)$(libdir)/../bin
+	$(INSTALL_DATA) $(LIBHOGWEED_FORLINK) $(DESTDIR)$(libdir)/../bin/$(LIBHOGWEED_FORLINK)
 
 install-shared-hogweed: $(LIBHOGWEED_FORLINK) @IF_DLL@ install-dll-hogweed
 	$(MKDIR_P) $(DESTDIR)$(libdir)
diff --git a/configure.ac b/configure.ac
index 7a17853..c854679 100644
--- a/configure.ac
+++ b/configure.ac
@@ -907,6 +907,27 @@ case "$host_os" in
     LIBHOGWEED_LIBS='libnettle.so $(LIBS)'
     ;;
 esac
+AC_ARG_VAR(MSVC_TARGET,[Enable msvc and set target architecture])
+case "$MSVC_TARGET" in
+x86|x64|arm|arm64)
+  LIBNETTLE_ARCHIVE='nettle.lib'
+  LIBNETTLE_FORLINK='nettle-$(LIBNETTLE_MAJOR).dll'
+  LIBNETTLE_FILE='nettle.lib'
+  LIBNETTLE_LINK='$(CC) $(CPPFLAGS) -Wl,$(LDFLAGS) -Wl,-DLL -Wl,-IMPLIB:$(LIBNETTLE_FILE) -Wl,-DEF:$(srcdir)/nettle-$(MSVC_TARGET).def'
+  LIBNETTLE_LIBS='$(LIBS)'
+  LIBHOGWEED_FILE='hogweed.lib'
+  LIBHOGWEED_ARCHIVE='hogweed.lib'
+  LIBHOGWEED_FORLINK='hogweed-$(LIBHOGWEED_MAJOR).dll'
+  LIBHOGWEED_LINK='$(CC) $(CPPFLAGS) -Wl,$(LDFLAGS) -Wl,-DLL -Wl,-IMPLIB:$(LIBHOGWEED_FILE) -Wl,-DEF:$(srcdir)/hogweed-$(MSVC_TARGET).def'
+  LIBHOGWEED_LIBS='$(LIBNETTLE_FILE) $(LIBS)'
+  ;;
+*)
+  LIBNETTLE_ARCHIVE='libnettle.a'
+  LIBHOGWEED_ARCHIVE='libhogweed.a'
+  ;;
+esac
+AC_SUBST(LIBNETTLE_ARCHIVE)
+AC_SUBST(LIBHOGWEED_ARCHIVE)
 
 ASM_SYMBOL_PREFIX=''
 ASM_ELF_STYLE='no'
diff --git a/getopt.c b/getopt.c
index 9d29de7..42df5a6 100644
--- a/getopt.c
+++ b/getopt.c
@@ -32,7 +32,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 
 /* Comment out all this code if we are using the GNU C Library, and are not