Update the makefile to regenerate makedependfile when the developer changes the content of makedependfile.SH

Before the pull request:
touch makedepend_file.SH && make
=> Nothing happens

After the pull request:
touch makedependfile.SH && make
=> makedependfile is regenerated
=> *.depends are regenerated
=> makefile is regenerated with dependencies

Adding makedependfile.SH in variable SH of Makefile.SH creates the target makedependfile in generated makefile:
diff before/perl5/Makefile after/perl5/Makefile
785a786,788
> makedependfile: makedependfile.SH config.sh
>       $(SHELL) makedependfile.SH
>

It has also the consequence that makedependfile is deleted with the rest of generated files: rm -rf $(addedbyconf)

Author: dlaugt

.gitignore

@@ -27,7 +27,7 @@ bug*.pl
 /config.sh
 /makeaperl
 /makedepend
-/makedepend_file
+/makedependfile
 /makedir
 /makefile
 /myconfig

MANIFEST

@@ -65,7 +65,7 @@ make_ext.pl				Used by Makefile to execute extension Makefiles
 make_patchnum.pl			Script to generate git_version.h and lib/Config_git.pl files for all OS'es
 makedef.pl				Create symbol export lists for linking
 makedepend.SH				Precursor to makedepend
-makedepend_file.SH			Precursor to makedepend_file
+makedependfile.SH			Precursor to makedependfile
 Makefile.SH				A script that generates Makefile
 malloc.c				A version of malloc you might not want
 malloc_ctl.h				A version of malloc you might not want

Makefile.SH

@@ -498,7 +498,7 @@ SH_to_target() {
     echo $@ | sed -e s/\\\.SH//g -e s/_/./g
 }
 
-SH='Makefile.SH cflags.SH config_h.SH makedepend.SH myconfig.SH runtests.SH pod/Makefile.SH'
+SH='Makefile.SH cflags.SH config_h.SH makedependfile.SH makedepend.SH myconfig.SH runtests.SH pod/Makefile.SH'
 shextract=`SH_to_target $SH`
 
 ## In the following dollars and backticks do not need the extra backslash.
@@ -1367,7 +1367,7 @@ veryclean:	_verycleaner _mopup _clobber
 _mopup:
 	rm -f *$(OBJ_EXT) *$(LIB_EXT) all perlmain.c $(mini_only_src) generate_uudmap$(EXE_EXT) $(generated_headers)
 	-rmdir .depending
-	-rm *.depends makedepend_file
+	-rm *.depends
 	-@test -f extra.pods && rm -f `cat extra.pods`
 	-@test -f vms/README_vms.pod && rm -f vms/README_vms.pod
 	-rm -f perl.exp ext.libs $(generated_pods) uni.data $(mini_only_objs) pod/roffitall
@@ -1495,11 +1495,14 @@ cscopeflags = -Rb  # Recursive, build-only.
 cscope.out cscope: $(c) $(h)
 	cscope $(cscopeflags)
 
-# Need to unset during recursion to go out of loop.
+# $(FIRSTMAKEFILE) is generated by the makedepend script.
+# The makedepend script uses the makedependfile script.
+
+# Need to unset MAKEDEPEND during recursion to go out of loop.
 # The README below ensures that the dependency list is never empty and
 # that when MAKEDEPEND is empty $(FIRSTMAKEFILE) doesn't need rebuilding.
 
-MAKEDEPEND = Makefile makedepend_file makedepend
+MAKEDEPEND = Makefile makedependfile makedepend
 
 $(FIRSTMAKEFILE):	README $(MAKEDEPEND)
 	$(MAKE) depend MAKEDEPEND=
@@ -1517,11 +1520,11 @@ done
 $spitshell >>$Makefile <<'!NO!SUBS!'
 
 .PHONY: depend
-depend: makedepend $(DTRACE_H) $(generated_headers)
+depend: makedependfile makedepend $(DTRACE_H) $(generated_headers)
 	sh ./makedepend MAKE="$(MAKE)" cflags
 
 .c.c.depends:
-	sh ./makedepend_file $< $@ cflags
+	sh ./makedependfile $< $@ cflags
 
 .PHONY: test check test_prep test_prep_nodll test_prep_pre \
 	test_prep_reonly test_tty test-tty test_notty test-notty \

makedepend_file.SH renamed to makedependfile.SH

@@ -18,16 +18,16 @@ case "$0" in
 */*) cd `expr X$0 : 'X\(.*\)/'` ;;
 esac
 
-echo "Extracting makedepend_file (with variable substitutions)"
-rm -f makedepend_file
-$spitshell >makedepend_file <<!GROK!THIS!
+echo "Extracting makedependfile (with variable substitutions)"
+rm -f makedependfile
+$spitshell >makedependfile <<!GROK!THIS!
 $startsh
-# makedepend_file.SH
+# makedependfile.SH
 #
 MAKE=$make
 trnl='$trnl'
 !GROK!THIS!
-$spitshell >>makedepend_file <<'!NO!SUBS!'
+$spitshell >>makedependfile <<'!NO!SUBS!'
 
 file=$1
 shift
@@ -172,5 +172,5 @@ esac
     $echo "$filebase\$(OBJ_EXT): $@" >>$outfile
 
 !NO!SUBS!
-$eunicefix makedepend_file
-chmod +x makedepend_file
+$eunicefix makedependfile
+chmod +x makedependfile