plugins: make test/example plugins work on windows

Generate a qemu_plugin_api.lib delay import lib on windows, for
windows qemu plugins to link against.

Implement an example dll load fail hook to link up the API functions
correctly when a plugin is loaded on windows.

Update the build scripts for the test and example plugins to use these
things.

Signed-off-by: Greg Manning <gmanning@rapitasystems.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231102172053.17692-3-gmanning@rapitasystems.com>
[AJB: use find_program for dlltool, s/Windows/windows/]
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231106185112.2755262-15-alex.bennee@linaro.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/configure b/configure
index cd6c521bd8..e50ec99fe2 100755
--- a/configure
+++ b/configure
@@ -1666,6 +1666,9 @@ fi
 if test "$targetos" = darwin; then
   echo "CONFIG_DARWIN=y" >> contrib/plugins/$config_host_mak
 fi
+if test "$targetos" = windows; then
+  echo "CONFIG_WIN32=y" >> contrib/plugins/$config_host_mak
+fi
 
 # tests/tcg configuration
 (config_host_mak=tests/tcg/config-host.mak