[gdk-pixbuf] win32/Makefile.msvc-introspection: Sync with G-I

[Chun-wei Fan <fanchunwei src gnome org>]

commit aa19439a1891de85b2445c7a8848805173cb2add
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Fri Feb 17 18:30:15 2017 +0800

    win32/Makefile.msvc-introspection: Sync with G-I
    
    This enables one to use the new method of using a list of C includes
    so that one will no longer need to use the full --c-include=... to
    generate the full NMake Makefile modules to build the introspection
    files.

 win32/Makefile.msvc-introspection |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/win32/Makefile.msvc-introspection b/win32/Makefile.msvc-introspection
index 370bcb9..1a244e0 100644
--- a/win32/Makefile.msvc-introspection
+++ b/win32/Makefile.msvc-introspection
@@ -2,7 +2,7 @@
 # Common autotools file for constructing the g-ir-scanner and
 # g-ir-compiler command lines for Visual Studio builds.
 
-# This is copied from the gobject-introspection
+# This is copied from $(srcroot)/win32 from the gobject-introspection
 # project, which may be included in projects that support both
 # Visual Studio builds and introspection.
 
@@ -18,7 +18,7 @@
 #    is required unless --headers-only is specified in
 #    YourLib_1_0_gir__MSVC_SCANNERFLAGS)
 #
-#   include $(top_srcdir)/Makefile.msvc-introspection
+#   include <this Makefile.msvc-introspection>
 #   MSVC_INTROSPECT_GIRS = YourLib-1.0.gir
 #   YourLib_1_0_gir_NAMESPACE = YourLib # This is optional
 #   YourLib_1_0_gir_VERSION = 1.0 # This is optional
@@ -27,7 +27,9 @@
 #   YourLib_1_0_gir_MSVC_PROGRAM = YourProgram
 #   YourLib_1_0_gir_MSVC_PACKAGES = (Dependent .pc files)
 #   YourLib_1_0_gir_MSVC_INCLUDE_GIRS = (Dependent external .gir's)
-#   YourLiv_1_0_gir_MSVC_EXPORT_PACKAGES = (Packages exported by this .gir)
+#   YourLib_1_0_gir_MSVC_EXPORT_PACKAGES = (Packages exported by this .gir)
+#   YourLib_1_0_gir_MSVC_C_INCLUDES = (List of public C headers which need to be included by
+#                                      consumers at compile time to make use of the API)
 
 # Private functions
 
@@ -63,6 +65,7 @@ _gir_libraries_msvc = $(foreach lib,$($(_gir_name)_MSVC_LIBS),--library=$(lib))
 _gir_packages_msvc = $(foreach pkg,$($(_gir_name)_MSVC_PACKAGES),--pkg=$(pkg))
 _gir_includes_msvc = $(foreach include,$($(_gir_name)_MSVC_INCLUDE_GIRS),--include=$(include))
 _gir_export_packages_msvc = $(foreach pkg,$($(_gir_name)_MSVC_EXPORT_PACKAGES),--pkg-export=$(pkg))
+_gir_c_includes_msvc = $(foreach include,$($(_gir_name)_MSVC_C_INCLUDES),--c-include=$(include))
 
 #
 # Create NMake Makefile Sections for Building Introspection files
@@ -104,6 +107,7 @@ $(top_builddir)/win32/$(1).msvc.introspect:
        echo '  --add-include-path=$$$$(G_IR_INCLUDEDIR)        \'>>$(top_builddir)/win32/$(1).msvc.introspect
        echo '  '$(_gir_includes_msvc)' \'>>$(top_builddir)/win32/$(1).msvc.introspect
        echo '  '$(_gir_export_packages_msvc)'  \'>>$(top_builddir)/win32/$(1).msvc.introspect
+       echo '  '$(_gir_c_includes_msvc)'       \'>>$(top_builddir)/win32/$(1).msvc.introspect
        echo '  --cflags-begin  \'>>$(top_builddir)/win32/$(1).msvc.introspect
        echo '  '$($(_gir_name)_MSVC_CFLAGS)'   \'>>$(top_builddir)/win32/$(1).msvc.introspect
        echo '  --cflags-end    \'>>$(top_builddir)/win32/$(1).msvc.introspect