src: remove all traces of Cygwin support

Cygwin is not a supported build platform for libvirt and
has no testing coverage in our CI systems. Stop pretending
the code is usable and remove it so there is less to port
to Meson.
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

configure.ac

@@ -181,8 +181,6 @@ case "$host" in
     # mingw's ld has the --version-script parameter, but it requires a .def file
     # instead to work properly, therefore clear --version-script here and use
     # -Wl, to pass the .def file to the linker
-    # cygwin's ld has the --version-script parameter too, but for some reason
-    # it's working there as expected
     VERSION_SCRIPT_FLAGS="-Wl,"
     ;;
   * )
@@ -204,13 +202,12 @@ dnl are also linux specific.  The "network" and storage_fs drivers are known
 dnl to not work on macOS presently, so we also make a note if compiling
 dnl for that
 
-with_linux=no with_macos=no with_freebsd=no with_win=no with_cygwin=no
+with_linux=no with_macos=no with_freebsd=no with_win=no
 case $host in
   *-*-linux*) with_linux=yes ;;
   *-*-darwin*) with_macos=yes ;;
   *-*-freebsd*) with_freebsd=yes ;;
   *-*-mingw* | *-*-msvc* ) with_win=yes ;;
-  *-*-cygwin*) with_cygwin=yes ;;
 esac
 
 if test $with_linux = no; then
@@ -227,9 +224,6 @@ if test $with_freebsd = yes; then
     with_firewalld=no
 fi
 
-if test $with_cygwin = yes; then
-    with_vbox=no
-fi
 
 AM_CONDITIONAL([WITH_LINUX], [test "$with_linux" = "yes"])
 AM_CONDITIONAL([WITH_FREEBSD], [test "$with_freebsd" = "yes"])
@@ -778,9 +772,8 @@ if test "$enable_test_coverage" = yes; then
   WARN_CFLAGS=$save_WARN_CFLAGS
 fi
 
-dnl Cygwin, MinGW and MSVC checks
+dnl MinGW checks
 LIBVIRT_WIN_CHECK_COMMON
-LIBVIRT_WIN_CHECK_CYGWIN
 LIBVIRT_WIN_CHECK_MINGW
 LIBVIRT_WIN_CHECK_SYMBOLS
 LIBVIRT_WIN_CHECK_WINDRES

m4/virt-compile-pie.m4

@@ -22,7 +22,7 @@ AC_DEFUN([LIBVIRT_COMPILE_PIE],[
     PIE_CFLAGS=
     PIE_LDFLAGS=
     case "$host" in
-      *-*-mingw* | *-*-msvc* | *-*-cygwin* )
+      *-*-mingw* )
          ;; dnl All code is position independent on Win32 target
       *)
       gl_COMPILER_OPTION_IF([-fPIE -DPIE -pie], [

m4/virt-win-common.m4

-dnl The Cygwin, MinGW and MSVC common checks
+dnl The MinGW common checks
 dnl
 dnl Copyright (C) 2016 Red Hat, Inc.
 dnl
@@ -22,7 +22,7 @@ AC_DEFUN([LIBVIRT_WIN_CHECK_COMMON], [
   WIN32_EXTRA_LIBS=
 
   case "$host" in
-    *-*-mingw* | *-*-cygwin* | *-*-msvc* )
+    *-*-mingw* )
       WIN32_EXTRA_LIBS="-lole32 -loleaut32"
       # If the host is Windows, and shared libraries are disabled, we
       # need to add -DLIBVIRT_STATIC to the CFLAGS for proper linking
@@ -38,7 +38,5 @@ AC_DEFUN([LIBVIRT_WIN_CHECK_COMMON], [
 
 AC_DEFUN([LIBVIRT_WIN_RESULT_COMMON], [
   details="CFLAGS='$WIN32_EXTRA_CFLAGS' LIBS='$WIN32_EXTRA_LIBS'"
-  LIBVIRT_RESULT([Cygwin], [$with_cygwin], [$details])
-  LIBVIRT_RESULT([MinGW], [$with_cygwin], [$details])
-  LIBVIRT_RESULT([MSVC], [$with_cygwin], [$details])
+  LIBVIRT_RESULT([MinGW], [$with_win], [$details])
 ])

m4/virt-win-cygwin.m4

-dnl The Cygwin check
-dnl
-dnl Copyright (C) 2016 Red Hat, Inc.
-dnl
-dnl This library is free software; you can redistribute it and/or
-dnl modify it under the terms of the GNU Lesser General Public
-dnl License as published by the Free Software Foundation; either
-dnl version 2.1 of the License, or (at your option) any later version.
-dnl
-dnl This library is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-dnl Lesser General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU Lesser General Public
-dnl License along with this library.  If not, see
-dnl <http://www.gnu.org/licenses/>.
-dnl
-
-AC_DEFUN([LIBVIRT_WIN_CHECK_CYGWIN], [
-  CYGWIN_EXTRA_LDFLAGS=
-  CYGWIN_EXTRA_LIBADD=
-  case "$host" in
-    *-*-cygwin*)
-      CYGWIN_EXTRA_LDFLAGS="-no-undefined"
-      CYGWIN_EXTRA_LIBADD="${INTLLIBS}"
-      ;;
-  esac
-
-  AC_SUBST([CYGWIN_EXTRA_LDFLAGS])
-  AC_SUBST([CYGWIN_EXTRA_LIBADD])
-])

m4/virt-win-symbols.m4

-dnl The Cygwin, MinGW and MSVC symbols checks
+dnl The MinGW symbols checks
 dnl
 dnl Copyright (C) 2016 Red Hat, Inc.
 dnl
@@ -23,7 +23,7 @@ AC_DEFUN([LIBVIRT_WIN_CHECK_SYMBOLS], [
   LIBVIRT_LXC_SYMBOL_FILE='$(srcdir)/libvirt_lxc.syms'
   LIBVIRT_QEMU_SYMBOL_FILE='$(srcdir)/libvirt_qemu.syms'
   case "$host" in
-    *-*-mingw* | *-*-msvc* )
+    *-*-mingw* )
       # Also set the symbol file to .def, so src/Makefile generates libvirt.def
       # from libvirt.syms and passes libvirt.def instead of libvirt.syms to the
       # linker

m4/virt-win-windres.m4

-dnl The Cygwin, MinGW and MSVC windres checks
+dnl The MinGW windres checks
 dnl
 dnl Copyright (C) 2016 Red Hat, Inc.
 dnl
@@ -21,7 +21,7 @@ AC_DEFUN([LIBVIRT_WIN_CHECK_WINDRES], [
   dnl Look for windres to build a Windows icon resource.
   with_windres=no
   case "$host" in
-    *-*-mingw* | *-*-cygwin* | *-*-msvc* )
+    *-*-mingw* )
       AC_CHECK_TOOL([WINDRES], [windres], [])
       if test "x$WINDRES" != "x"; then
         with_windres=yes

m4/virt-xdr.m4

@@ -22,18 +22,15 @@ AC_DEFUN([LIBVIRT_CHECK_XDR], [
   if test x"$with_remote" = x"yes" || test x"$with_libvirtd" = x"yes"; then
     dnl Where are the XDR functions?
     dnl If portablexdr is installed, prefer that.
-    dnl Otherwise try -lrpc (Cygwin) -lxdr (some MinGW), -lnsl (Solaris)
+    dnl Otherwise try -lxdr (some MinGW)
     dnl -ltirpc (glibc 2.13.90 or newer) or none (most Unix)
     AC_CHECK_LIB([portablexdr],[xdrmem_create],[],[
-      AC_SEARCH_LIBS([xdrmem_create],[rpc xdr nsl tirpc],[],
+      AC_SEARCH_LIBS([xdrmem_create],[xdr tirpc],[],
         [AC_MSG_ERROR([Cannot find a XDR library])])
     ])
     with_xdr="yes"
 
-    dnl check for cygwin's variation in xdr function names
-    AC_CHECK_FUNCS([xdr_u_int64_t],[],[],[#include <rpc/xdr.h>])
-
-    dnl Cygwin/recent glibc requires -I/usr/include/tirpc for <rpc/rpc.h>
+    dnl Recent glibc requires -I/usr/include/tirpc for <rpc/rpc.h>
     old_CFLAGS=$CFLAGS
     AC_CACHE_CHECK([where to find <rpc/rpc.h>], [lv_cv_xdr_cflags], [
       for add_CFLAGS in '' '-I/usr/include/tirpc' 'missing'; do

src/Makefile.am

@@ -42,7 +42,6 @@ AM_LDFLAGS =	$(DRIVER_MODULES_LDFLAGS) \
 		$(COVERAGE_LDFLAGS) \
 		$(RELRO_LDFLAGS) \
 		$(NO_INDIRECT_LDFLAGS) \
-		$(CYGWIN_EXTRA_LDFLAGS) \
 		$(MINGW_EXTRA_LDFLAGS) \
 		$(NULL)
 AM_LDFLAGS_MOD = \
@@ -450,8 +449,7 @@ endif WITH_MACOS
 libvirt_la_LDFLAGS += $(NULL)
 libvirt_la_BUILT_LIBADD += ../gnulib/lib/libgnu.la
 libvirt_la_LIBADD += \
-		    $(DRIVER_MODULES_LIBS) \
-		    $(CYGWIN_EXTRA_LIBADD)
+		    $(DRIVER_MODULES_LIBS)
 libvirt_la_CFLAGS = -DIN_LIBVIRT $(AM_CFLAGS)
 # Because we specify libvirt_la_DEPENDENCIES for $(LIBVIRT_SYMBOL_FILE), we
 # lose automake's automatic dependencies on an appropriate subset of
@@ -518,7 +516,7 @@ libvirt_qemu_la_LDFLAGS = \
 		$(AM_LDFLAGS) \
 		$(NULL)
 libvirt_qemu_la_CFLAGS = $(AM_CFLAGS)
-libvirt_qemu_la_LIBADD = libvirt.la $(CYGWIN_EXTRA_LIBADD)
+libvirt_qemu_la_LIBADD = libvirt.la
 
 libvirt_lxc_la_SOURCES = libvirt-lxc.c
 libvirt_lxc_la_LDFLAGS = \
@@ -528,7 +526,7 @@ libvirt_lxc_la_LDFLAGS = \
 		$(AM_LDFLAGS) \
 		$(NULL)
 libvirt_lxc_la_CFLAGS = $(AM_CFLAGS)
-libvirt_lxc_la_LIBADD = libvirt.la $(CYGWIN_EXTRA_LIBADD)
+libvirt_lxc_la_LIBADD = libvirt.la
 
 EXTRA_DIST += \
 	$(SYSCONF_FILES) \

src/admin/Makefile.inc.am

@@ -73,7 +73,6 @@ libvirt_admin_la_LDFLAGS = \
 
 libvirt_admin_la_LIBADD = \
 	libvirt.la \
-	$(CYGWIN_EXTRA_LIBADD) \
 	$(CAPNG_LIBS) \
 	$(YAJL_LIBS) \
 	$(DEVMAPPER_LIBS) \

src/locking/Makefile.inc.am

@@ -162,7 +162,6 @@ virtlockd_LDADD = \
 	libvirt_driver_admin.la \
 	$(GLIB_LIBS) \
 	../gnulib/lib/libgnu.la \
-	$(CYGWIN_EXTRA_LIBADD) \
 	$(NULL)
 if WITH_DTRACE_PROBES
 virtlockd_LDADD += libvirt_probes.lo

src/logging/Makefile.inc.am

@@ -99,7 +99,6 @@ virtlogd_LDADD = \
 		libvirt.la \
 		$(GLIB_LIBS) \
 		../gnulib/lib/libgnu.la \
-		$(CYGWIN_EXTRA_LIBADD) \
 		$(NULL)
 if WITH_DTRACE_PROBES
 virtlogd_LDADD += libvirt_probes.lo

src/rpc/Makefile.inc.am

@@ -97,7 +97,6 @@ libvirt_net_rpc_la_LDFLAGS = \
 	$(SECDRIVER_LIBS) \
 	$(AM_LDFLAGS) \
 	$(NULL)
-libvirt_net_rpc_la_LIBADD = $(CYGWIN_EXTRA_LIBADD)
 
 libvirt_net_rpc_server_la_SOURCES = \
 	rpc/virnetserverprogram.h \
@@ -122,7 +121,6 @@ libvirt_net_rpc_server_la_LDFLAGS = \
 	$(AM_LDFLAGS) \
 	$(DBUS_LIBS) \
 	$(NULL)
-libvirt_net_rpc_server_la_LIBADD = $(CYGWIN_EXTRA_LIBADD)
 
 libvirt_net_rpc_client_la_SOURCES = \
 	rpc/virnetclientprogram.h \
@@ -138,7 +136,6 @@ libvirt_net_rpc_client_la_CFLAGS = \
 	$(XDR_CFLAGS) \
 	$(NULL)
 libvirt_net_rpc_client_la_LDFLAGS = $(AM_LDFLAGS)
-libvirt_net_rpc_client_la_LIBADD = $(CYGWIN_EXTRA_LIBADD)
 
 if WITH_SASL
 libvirt_net_rpc_client_la_CFLAGS += \

src/rpc/genprotocol.pl

@@ -47,7 +47,7 @@ open RPCGEN, "-|", "$rpcgen $mode $xdrdef"
 open TARGET, ">$target"
     or die "cannot create $target: $!";
 
-my $fixup = $^O eq "linux" || $^O eq "cygwin" || $^O eq "gnukfreebsd" || $^O eq "freebsd" || $^O eq "darwin";
+my $fixup = $^O eq "linux" || $^O eq "gnukfreebsd" || $^O eq "freebsd" || $^O eq "darwin";
 
 if ($mode eq "-c") {
     print TARGET "#include <config.h>\n";

src/util/virsocketaddr.h

@@ -26,16 +26,6 @@
 
 #include "internal.h"
 
-/* On architectures which lack these limits, define them (ie. Cygwin).
- * Note that the libvirt code should be robust enough to handle the
- * case where actual value is longer than these limits (eg. by setting
- * length correctly in second argument to gethostname and by always
- * using strncpy instead of strcpy).
- */
-#ifndef INET_ADDRSTRLEN
-# define INET_ADDRSTRLEN 16
-#endif
-
 #define VIR_LOOPBACK_IPV4_ADDR "127.0.0.1"
 
 typedef struct {

src/util/virxdrdefs.h

@@ -20,18 +20,8 @@
 
 #pragma once
 
-/* cygwin's xdr implementation defines xdr_u_int64_t instead of xdr_uint64_t
- * and lacks IXDR_PUT_INT32 and IXDR_GET_INT32
+/* The portablexdr implementation lacks IXDR_PUT_U_INT32 and IXDR_GET_U_INT32
  */
-#ifdef HAVE_XDR_U_INT64_T
-# define xdr_uint64_t xdr_u_int64_t
-#endif
-#ifndef IXDR_PUT_INT32
-# define IXDR_PUT_INT32 IXDR_PUT_LONG
-#endif
-#ifndef IXDR_GET_INT32
-# define IXDR_GET_INT32 IXDR_GET_LONG
-#endif
 #ifndef IXDR_PUT_U_INT32
 # define IXDR_PUT_U_INT32 IXDR_PUT_U_LONG
 #endif