Fix building, installing, and testing extensions on MS-Windows.

 test/Makefile.in (mpfr-tests, shlib-tests): Add a blank character
 between ' and /FOO/ in Gawk command lines, for the benefit of
 testing under MSYS Bash.
 test/filefuncs.awk (BEGIN): Call 'stat' on gawkapi.o, not on gawk,
 which does not exist on systems that produce gawk.exe.

 README_D/README.pc: Update the pc build and test instructions.

 pc/Makefile.tst (AWK): Set AWKLIBPATH so extensions could be found.
 (LS): New variable.
 (check): Add back shlib-tests and shlib-msg-end.
 (readdir): Add a warning regarding inode reporting by ls.exe.
 (fts, fork, fork2): Add message about expected failure on MinGW.
 pc/Makefile (install): Install the extensions.
 (install-strip): Likewise.
 pc/Makefile.ext: New file.

 io.c (devopen) [__EMX__ || __MINGW32__]: Produce EISDIR on MinGW
 when an attempt to open() a directory fails.
 (two_way_open) [__EMX__ || __MINGW32__]: When trying to open() a
 directory fails with EISDIR, assign FAKE_FD_VALUE to the file
 descriptor and attributes of a directory to its mode bits.  This
 is needed to support the readdir extension.
 gawkapi.h (FAKE_FD_VALUE): New macro, used in io.h and in
 extension/gawkdirfd.h.

 extension/rwarray.c [__MINGW32__]: Include winsock2.h instead of
 arpa/inet.h.
 extension/readdir.c [__MINGW32__]: Include windows.h.
 Include gawkapi.h before gawkdirfd.h, since the former defines
 FAKE_FD_VALUE needed by the latter.
 (ftype): Accept an additional argument, the directory that is
 being read.  Callers changed.
 [!DT_BLK]: Produce the file's type by calling 'stat' on it, if the
 dirent structure doesn't provide that.
 (get_inode): New function, to produce inode values on MS-Windows.
 (dir_get_record): Use it.
 extension/inplace.c (chown, link) [__MINGW32__]: Redirect to existing
 library functions.
 (mkstemp) [__MINGW32__]: New function, for MinGW, which doesn't
 have it in its library.
 (do_inplace_end) [__MINGW32__]: Remove the old file before
 renaming the new, since 'rename' on Windows cannot overwrite
 existing files.
 extension/gawkdirfd.h (ENOTSUP): Define to ENOSYS if not already defined.
 (DIR_TO_FD): If not defined yet, define to FAKE_FD_VALUE.
 extension/filefuncs.c (get_inode) [_WIN32]: New function, produces the
 file index used on Windows as its inode.
 (fill_stat_array) [_WIN32]: Use it.

2 files changed, 15 insertions, 4 deletions

diff --git a/README_d/ChangeLog b/README_d/ChangeLog
index 814b2724..3bd99ad0 100644
--- a/README_d/ChangeLog
+++ b/README_d/ChangeLog
@@ -1,3 +1,7 @@
+2013-05-14  Eli Zaretskii  <eliz@gnu.org>
+
+	* README.pc: Update the pc build and test instructions.
+
 2013-05-09         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.0: Release tar ball made.
diff --git a/README_d/README.pc b/README_d/README.pc
index d989e5ca..9971d7ba 100644
--- a/README_d/README.pc
+++ b/README_d/README.pc
@@ -28,7 +28,8 @@ Copy the files in the `pc' directory (EXCEPT for `ChangeLog') to the
 directory with the rest of the gawk sources.  (The subdirectories of 
 `pc' need not be copied.)  The Makefile contains a configuration 
 section with comments, and may need to be edited in order to work
-with your make utility.
+with your make utility.  If you are building with MinGW, copy the
+file Makefile.ext to extension/Makefile.
 
 The "prefix" line in the Makefile is used during the install of gawk
 (and in building igawk.bat and igawk.cmd). Since the libraries for
@@ -40,6 +41,10 @@ OS/2 versions.  A list of targets will be printed if the make command is
 given without a target.  As an example, to build gawk using the djgpp
 tools, enter "make djgpp".
 
+For the MinGW build, after you build in the top-level directory, chdir
+to the extension subdirectory and say "make" there to build the
+extensions.
+
 
 Testing and installing gawk
 ---------------------------
@@ -54,9 +59,11 @@ and batch files. See the configuration section of the makefile.
 
 The file test/Makefile will need some editing (especially for DOS). A
 sample makefile with comments appears in pc/Makefile.tst, and can be
-used to modify test/Makefile for your platform.  In addition, some
-files in the test directory may need to have their end-of-line markers
-converted, as described in Makefile.tst.
+used to modify test/Makefile for your platform.  For starters, just
+copy pc/Makefile.tst to test/Makefile, then walk through the variables
+defined at the beginning and change them as appropriate for your
+setup.  In addition, some files in the test directory may need to have
+their end-of-line markers converted, as described in Makefile.tst.
 
 As with building gawk, the OS, shell, and long filename issues come into
 play when testing, too.  If you are testing gawk on a LFN aware system with