Move duplicated documentation rules to Makefile.shared

- Also, harmonize libm to use CHEWOUT_FILES like libc, rather than chobj.
  Update documentation appropriately.

        * HOWTO: Update.
        * Makefile.shared: Move documentation rules to here...
        * libc/argz/Makefile.am: ... from here ...
        * libc/ctype/Makefile.am: ... and here.
        * libc/errno/Makefile.am: Ditto.
        * libc/iconv/Makefile.am: Ditto.
        * libc/iconv/ccs/Makefile.am : Ditto.
        * libc/iconv/ces/Makefile.am: Ditto.
        * libc/iconv/lib/Makefile.am: Ditto.
        * libc/locale/Makefile.am: Ditto.
        * libc/misc/Makefile.am: Ditto.
        * libc/posix/Makefile.am: Ditto.
        * libc/reent/Makefile.am: Ditto.
        * libc/search/Makefile.am: Ditto.
        * libc/stdio/Makefile.am: Ditto.
        * libc/stdio64/Makefile.am: Ditto.
        * libc/stdlib/Makefile.am : Ditto.
        * libc/string/Makefile.am: Ditto.
        * libc/syscalls/Makefile.am: Ditto.
        * libc/time/Makefile.am : Ditto.
        * libc/unix/Makefile.am: Ditto.
        * libc/xdr/Makefile.am: Ditto.
        * libm/common/Makefile.am: Ditto.
        * libm/complex/Makefile.am: Ditto.
        * libm/math/Makefile.am: Ditto.
        * libm/mathfp/Makefile.am: Ditto.

2 files changed, 21 insertions, 25 deletions

diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index ead5dd190..f9ba5d5d5 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -292,20 +292,7 @@ CHEWOUT_FILES= \
 	wcstombs.def	\
 	wctomb.def	
 
-SUFFIXES = .def
-
-CHEW = ../../doc/makedoc -f $(srcdir)/../../doc/doc.str
-
-.c.def:
-	$(CHEW) < $< > $*.def 2> $*.ref
-	touch stmp-def
-
-TARGETDOC = ../tmp.texi
-
-doc: $(CHEWOUT_FILES)
-	cat $(srcdir)/stdlib.tex >> $(TARGETDOC)
-
-CLEANFILES = $(CHEWOUT_FILES) *.ref
+CHAPTERS = stdlib.tex
 
 $(lpfx)dtoa.$(oext): dtoa.c mprec.h
 $(lpfx)ldtoa.$(oext): ldtoa.c mprec.h
diff --git a/newlib/libc/stdlib/Makefile.in b/newlib/libc/stdlib/Makefile.in
index 5f21688ce..676c1d65f 100644
--- a/newlib/libc/stdlib/Makefile.in
+++ b/newlib/libc/stdlib/Makefile.in
@@ -479,6 +479,13 @@ libstdlib_la_LDFLAGS = -Xcompiler -nostdlib
 @USE_LIBTOOL_FALSE@lib_a_LIBADD = $(LIBADD_OBJS) $(ELIX_OBJS)
 @USE_LIBTOOL_FALSE@lib_a_CFLAGS = $(AM_CFLAGS)
 @USE_LIBTOOL_FALSE@lib_a_DEPENDENCIES = $(LIBADD_OBJS) $(ELIX_OBJS)
+
+#
+# documentation rules
+#
+SUFFIXES = .def
+CHEW = ${top_builddir}/../doc/makedoc -f $(top_srcdir)/../doc/doc.str
+CLEANFILES = $(CHEWOUT_FILES) *.ref
 MALLOC_COMPILE = $(LIB_COMPILE) -DINTERNAL_NEWLIB
 CHEWOUT_FILES = \
 	_Exit.def	\
@@ -528,10 +535,7 @@ CHEWOUT_FILES = \
 	wcstombs.def	\
 	wctomb.def	
 
-SUFFIXES = .def
-CHEW = ../../doc/makedoc -f $(srcdir)/../../doc/doc.str
-TARGETDOC = ../tmp.texi
-CLEANFILES = $(CHEWOUT_FILES) *.ref
+CHAPTERS = stdlib.tex
 all: all-am
 
 .SUFFIXES:
@@ -1439,6 +1443,18 @@ objectlist.awk.in: $(noinst_LTLIBRARIES)
 	  echo $$i `pwd`/$$i >> objectlist.awk.in ; \
 	done
 
+.c.def:
+	$(CHEW) < $< > $*.def 2> $*.ref
+	touch stmp-def
+
+TARGETDOC ?= ../tmp.texi
+
+doc: $(CHEWOUT_FILES)
+	for chapter in $(CHAPTERS) ; \
+	do \
+	  cat $(srcdir)/$$chapter >> $(TARGETDOC) ; \
+	done
+
 $(lpfx)$(MALLOCR).$(oext): $(MALLOCR).c
 	$(MALLOC_COMPILE) -DDEFINE_MALLOC -c $(srcdir)/$(MALLOCR).c -o $@
 
@@ -1475,13 +1491,6 @@ $(lpfx)$(MSIZER).$(oext): $(MALLOCR).c
 $(lpfx)$(MALLOPTR).$(oext): $(MALLOCR).c
 	$(MALLOC_COMPILE) -DDEFINE_MALLOPT -c $(srcdir)/$(MALLOCR).c -o $@
 
-.c.def:
-	$(CHEW) < $< > $*.def 2> $*.ref
-	touch stmp-def
-
-doc: $(CHEWOUT_FILES)
-	cat $(srcdir)/stdlib.tex >> $(TARGETDOC)
-
 $(lpfx)dtoa.$(oext): dtoa.c mprec.h
 $(lpfx)ldtoa.$(oext): ldtoa.c mprec.h
 $(lpfx)ecvtbuf.$(oext): ecvtbuf.c mprec.h