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.

3 files changed, 17 insertions, 4 deletions

diff --git a/test/ChangeLog b/test/ChangeLog
index 20b4d6e2..fda3b681 100644
--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -1,3 +1,12 @@
+2013-05-14  Eli Zaretskii  <eliz@gnu.org>
+
+	* 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.
+
+	* filefuncs.awk (BEGIN): Call 'stat' on gawkapi.o, not on gawk,
+	which does not exist on systems that produce gawk.exe.
+
 2013-05-09         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.0: Release tar ball made.
diff --git a/test/Makefile.in b/test/Makefile.in
index 46e7f57a..bfecafc0 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -1453,14 +1453,18 @@ inet:	inetmesg $(INET_TESTS)
 
 machine-tests: $(MACHINE_TESTS)
 
+# The blank between ' and /MPFR/ is for running tests on Windows under
+# MSYS, which thinks /MPFR is a Unix-style file name and converts it
+# to Windows format, butchering it in the process.  Likewise for /API/
+# in the next shlib-tests.
 mpfr-tests:
-	@if $(AWK) --version | $(AWK) '/MPFR/ { exit 1 }' ; then \
+	@if $(AWK) --version | $(AWK) ' /MPFR/ { exit 1 }' ; then \
 	echo MPFR tests not supported on this system ; \
 	else $(MAKE) $(MPFR_TESTS) ; \
 	fi
 
 shlib-tests:
-	@if $(AWK) --version | $(AWK) '/API/ { exit 1 }' ; then \
+	@if $(AWK) --version | $(AWK) ' /API/ { exit 1 }' ; then \
 	echo shlib tests not supported on this system ; \
 	else $(MAKE) shlib-real-tests ; \
 	fi
diff --git a/test/filefuncs.awk b/test/filefuncs.awk
index aa532741..4bbfcb55 100644
--- a/test/filefuncs.awk
+++ b/test/filefuncs.awk
@@ -6,8 +6,8 @@ BEGIN {
       exit 1
    }
 
-   if (stat(ARGV[0], st) < 0) {
-      printf "Error: stat(%s) failed with ERRNO %s\n", ARGV[0], ERRNO
+   if (stat(ARGV[0] "api.o", st) < 0) {
+      printf "Error: stat(%s) failed with ERRNO %s\n", ARGV[0] "api.o", ERRNO
       exit 1
    }