Integrate two DJGPP portability patches from the 5.6.2 branch :

[20859]
Two portability patches for DJGPP from Richard Dawe
<rich@phekda.freeserve.co.uk>.
Message-Id: <E19qfNh-0000Zq-00@phekda.freeserve.co.uk>

[20911]
Don't uppercase automatically all environment variables on DJGPP.
(reported by Richard Dawe, this breaks portability of Unix
scripts.) Don't change the behaviour on plain MS/DOS.
p4raw-link: @20911 on //depot/maint-5.6/perl-5.6.2: 91a64263ab3d9ea51fa198428b79b128d13386a5
p4raw-link: @20859 on //depot/maint-5.6/perl-5.6.2: e61553d05d06f2b080893dabff3b9134ba8b77f7

p4raw-id: //depot/perl@20913
p4raw-edited: from //depot/maint-5.6/perl-5.6.2@20912 'edit in' perl.c
	(@20322..)
p4raw-integrated: from //depot/maint-5.6/perl-5.6.2@20912 'merge in'
	djgpp/djgppsed.sh dosish.h (@20322..)

3 files changed, 47 insertions, 2 deletions

diff --git a/djgpp/djgppsed.sh b/djgpp/djgppsed.sh
index 8ce64a4a75..f84452e636 100644
--- a/djgpp/djgppsed.sh
+++ b/djgpp/djgppsed.sh
@@ -39,7 +39,7 @@ sed -e $SABC t/io/inplace.t >s; mv -f s t/io/inplace.t
 sed -e $SDBMX -e $SDBHASH ext/GDBM_File/t/gdbm.t >s; mv -f s ext/GDBM_File/t/gdbm.t
 sed -e $SSTAT -e $STMP2 t/op/stat.t >s; mv -f s t/op/stat.t
 sed -e $SLIST x2p/Makefile.SH |tr -d '\r' >s; mv -f s x2p/Makefile.SH
-sed -e 's=^#define.\([A-Z]\+\)_EXP.*$=#define \1_EXP djgpp_pathexp("\1")=g' config_h.SH >s; mv -f s config_h.SH
+#sed -e 's=^#define.\([A-Z]\+\)_EXP.*$=#define \1_EXP djgpp_pathexp("\1")=g' config_h.SH >s; mv -f s config_h.SH
 sed -e 's=:^/:={^([a-z]:)?[\\\\/]}=g' lib/termcap.pl >s; mv -f s lib/termcap.pl
 sed -e $SPACKLIST installman >s; mv -f s installman
 sed -e $SPACKLIST lib/ExtUtils/Installed.pm >s; mv -f s lib/ExtUtils/Installed.pm
diff --git a/dosish.h b/dosish.h
index e606bebc66..1e4a58b968 100644
--- a/dosish.h
+++ b/dosish.h
@@ -139,3 +139,48 @@
 #  define HAS_WAIT
 #  define HAS_CHOWN
 #endif	/* WIN32 */
+
+/*
+ * <rich@phekda.freeserve.co.uk>: The DJGPP port has code that converts
+ * the return code of system() into the form that Unixy wait usually
+ * returns:
+ *
+ * - signal number in bits 0-6;
+ * - core dump flag in bit 7;
+ * - exit code in bits 8-15.
+ *
+ * Bits 0-7 are always zero for DJGPP, because it uses system().
+ * See djgpp.c.
+ *
+ * POSIX::W* use the W* macros from <sys/wait.h> to decode
+ * the return code. Unfortunately the W* macros for DJGPP use
+ * a different format than Unixy wait does. So there's a mismatch
+ * and, say, WEXITSTATUS($?) will return bogus values.
+ *
+ * So here we add hack to redefine the W* macros from DJGPP's <sys/wait.h>
+ * to work with our return-code conversion.
+ */
+
+#ifdef DJGPP
+
+#include <sys/wait.h>
+
+#undef WEXITSTATUS
+#undef WIFEXITED
+#undef WIFSIGNALED
+#undef WIFSTOPPED
+#undef WNOHANG
+#undef WSTOPSIG
+#undef WTERMSIG
+#undef WUNTRACED
+
+#define WEXITSTATUS(stat_val) ((stat_val) >> 8)
+#define WIFEXITED(stat_val)   0
+#define WIFSIGNALED(stat_val) 0
+#define WIFSTOPPED(stat_val)  0
+#define WNOHANG               0
+#define WSTOPSIG(stat_val)    0
+#define WTERMSIG(stat_val)    0
+#define WUNTRACED             0
+
+#endif
diff --git a/perl.c b/perl.c
index 0569d5b426..297e90411b 100644
--- a/perl.c
+++ b/perl.c
@@ -3759,7 +3759,7 @@ S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register
 	  for (; *env; env++) {
 	    if (!(s = strchr(*env,'=')))
 		continue;
-#if defined(MSDOS)
+#if defined(MSDOS) && !defined(DJGPP)
 	    *s = '\0';
 	    (void)strupr(*env);
 	    *s = '=';