[gtk/wip/lantw/GDK-Win32-Fix-MinGW-autotools-build] GDK/Win32: Fix MinGW autotools build

[Ting-Wei Lan <lantw src gnome org>]

commit 26d61e2abc22707e628045b1c33ea9930e8ca0dc
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Fri Sep 24 00:06:51 2021 +0800

    GDK/Win32: Fix MinGW autotools build
    
    MinGW-w64 CRT provides no 'hid.lib' file. Instead, it has 'libhid.a'
    which can be linked with '-lhid' linker argument.
    
    Also, we have to declare the '_LIBADD' variable and add 'LDADDS' to it,
    or 'LDADDS' won't do anything for the build.

 gdk/win32/Makefile.am | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/gdk/win32/Makefile.am b/gdk/win32/Makefile.am
index 5fe1289570..21f4579192 100644
--- a/gdk/win32/Makefile.am
+++ b/gdk/win32/Makefile.am
@@ -22,7 +22,7 @@ AM_CPPFLAGS += "-DGDK_WIN32_ENABLE_EGL=1"
 endif #WIN32_GLES
 
 libgdk_win32_DEP_LIBS = \
-       hid.lib
+       -lhid
 
 LDADDS = $(libgdk_win32_DEP_LIBS) $(GDK_DEP_LIBS)
 
@@ -87,6 +87,10 @@ libgdk_win32_la_SOURCES = \
        wintab.h \
        xcursors.h
 
+libgdk_win32_la_LIBADD = \
+       $(LDADDS) \
+       $(NULL)
+
 libgdkinclude_HEADERS =                \
        gdkwin32.h