build: Add a pre-configure config.h template for MSVC builds

This adds a pre-configured config.h(.win32.in) that can be used for builds
on Visual Studio, where autotools is normally not available, so that we
can build pkg-config on Visual Studio.

Makefile.am

@@ -45,7 +45,9 @@ m4dir = $(datadir)/aclocal
 m4_DATA = pkg.m4
 dist_doc_DATA = pkg-config-guide.html
 dist_man_MANS = pkg-config.1
-EXTRA_DIST = README.win32
+EXTRA_DIST =	\
+	README.win32		\
+	config.h.win32
 
 # gcov test coverage
 gcov:

config.h.win32.in

@@ -0,0 +1,98 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define ${prefix} in .pc files at runtime */
+#define ENABLE_DEFINE_PREFIX 1
+
+/* Link library to all dependent libraries, not only directly needed ones */
+#define ENABLE_INDIRECT_DEPS 1
+
+/* Define to 1 if you have the <dirent.h> header file. */
+#ifndef _MSC_VER
+#define HAVE_DIRENT_H 1
+#endif
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+/* #undef HAVE_DLFCN_H */
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#if !defined (_MSC_VER) || (_MSC_VER >= 1800)
+#define HAVE_INTTYPES_H 1
+#endif
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#define HAVE_MALLOC_H 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#if (!defined(_MSC_VER) || (_MSC_VER >= 1600))
+#define HAVE_STDINT_H 1
+#endif
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#ifndef _MSC_VER
+#define HAVE_STRINGS_H 1
+#endif
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <sys/wait.h> header file. */
+/* #undef HAVE_SYS_WAIT_H */
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#ifndef _MSC_VER
+#define HAVE_UNISTD_H 1
+#endif
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#define LT_OBJDIR ".libs/"
+
+/* Name of package */
+#define PACKAGE "pkg-config"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "@PACKAGE_BUGREPORT@"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "@PACKAGE_NAME@"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "@PACKAGE_NAME@ @PACKAGE_VERSION@"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "@PACKAGE_TARNAME@"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "@PACKAGE_VERSION@"
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "@PACKAGE_VERSION@"
+
+/* Enable large inode numbers on Mac OS X 10.5.  */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
+/* Number of bits in a file offset, on hosts where this is settable. */
+/* #undef _FILE_OFFSET_BITS */
+
+/* Define for large files, on AIX-style hosts. */
+/* #undef _LARGE_FILES */

configure.ac

@@ -258,5 +258,6 @@ Makefile
 pkg.m4
 check/Makefile
 check/config.sh
+config.h.win32
 ])
 AC_OUTPUT