NMake: Move NMake Makefiles into its own subdir

Makes the $(srcroot) a bit cleaner.  Also don't track the build artfacts
as well as config.h.win32, since it is generated when building a release
tarball.

Makefile.am

@@ -6,7 +6,7 @@ endif
 
 # Normally we'd want glib to be part of DIST_SUBDIRS unconditionally,
 # but distclean gets broken unless we always run glib's configure
-SUBDIRS = $(GLIB_SUBDIR) . check
+SUBDIRS = $(GLIB_SUBDIR) . check nmake
 DIST_SUBDIRS = $(SUBDIRS)
 
 # Escape paths properly on windows
@@ -45,11 +45,7 @@ m4dir = $(datadir)/aclocal
 m4_DATA = pkg.m4
 dist_doc_DATA = pkg-config-guide.html
 dist_man_MANS = pkg-config.1
-EXTRA_DIST =	\
-	README.win32		\
-	detectenv-msvc.mak	\
-	Makefile.vc		\
-	config.h.win32
+EXTRA_DIST = README.win32
 
 # gcov test coverage
 gcov:

README.win32

@@ -33,14 +33,18 @@ unlike the normal autotools builds.  The headers and libs either need to
 be found in your default %INCLUDE% and %LIB% respectively, or they need
 to be found in $(GLIB_PREFIX)\include and $(GLIB_PREFIX)\lib respectively;
 please see Makefile.vc for adjusting $(GLIB_PREFIX) to suit your needs.
-To build pkg-config with MSVC, run in a Visual Studio command prompt:
+To build pkg-config with MSVC, run in a Visual Studio command prompt from
+the "nmake" subdirectory:
 
 "nmake /f Makefile.vc CFG=release" (release builds) -or-
 "nmake /f Makefile.vc CFG=debug" (debug builds)
 
-The resulting pkg-config.exe will be found in [release|debug]\[win32|x64];
-a 'clean' target is supported to clean up the build.  MSVC 2008
-through 2015 is supported; older versions may work as well but is not
-tested.  Note that building with the glib bundled with this source
+The resulting pkg-config.exe will be found in
+nmake\vsXX\[release|debug]\[win32|x64|arm64], where vsXX stands for the
+short Visual Studio version, which is 9 for 2008, 10 for 2010, 14 for 2015
+and so on; a 'clean' target is supported to clean up the build.  MSVC 2008
+through 2022 is supported, for the x86, x86_64 (x64) and aarch64 (ARM64)
+architectures; older versions may work as well but is not tested.  Note
+that building with the glib bundled with this source
 distribution is not currently supported-the glib DLL and all of its
 dependent DLLs are required at runtime.

configure.ac

@@ -258,6 +258,7 @@ Makefile
 pkg.m4
 check/Makefile
 check/config.sh
-config.h.win32
+nmake/Makefile
+nmake/config.h.win32
 ])
 AC_OUTPUT

nmake/.gitignore

@@ -0,0 +1,2 @@
+config.h.win32
+vs*/

nmake/Makefile.am

@@ -0,0 +1,4 @@
+EXTRA_DIST = \
+	detectenv-msvc.mak	\
+	Makefile.vc		\
+	config.h.win32

nmake/Makefile.vc

@@ -49,7 +49,7 @@ LDFLAGS = $(LDFLAGS_BASE)
 LDFLAGS = $(LDFLAGS_BASE) /opt:ref /LTCG
 !endif
 
-!include Makefile.sources
+!include ..\Makefile.sources
 
 # Convert the source (*.c) listing to object (.obj) listing in
 # another NMake Makefile module, include it, and clean it up.
@@ -70,7 +70,7 @@ LDFLAGS = $(LDFLAGS_BASE) /opt:ref /LTCG
 
 pkg_config_LIBS = glib-2.0.lib
 
-{}.c{vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\}.obj::
+{..\}.c{vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\}.obj::
 	@if not exist vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\ md vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config
 	@if not exist vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\config.h copy config.h.win32 vs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\config.h
 	$(CC) $(pkg_config_CFLAGS) /Fovs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\ /Fdvs$(VSVER)\$(CFG)\$(PLAT)\pkg-config\ /c @<<