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* [newlib-cygwin] Use enum __packed in favour of -fshort-enums
@ 2017-04-03  8:28 Corinna Vinschen
  0 siblings, 0 replies; only message in thread
From: Corinna Vinschen @ 2017-04-03  8:28 UTC (permalink / raw)
  To: newlib-cvs

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=f70d9ae6adc6ed7952806056349ba9f8ba3c65c8

commit f70d9ae6adc6ed7952806056349ba9f8ba3c65c8
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date:   Fri Mar 31 11:00:42 2017 +0200

    Use enum __packed in favour of -fshort-enums
    
    Some architectures like ARM encode the short enum option state in the
    object file and the linker checks that this option is consistent for all
    objects of an executable.  In case applications use -fno-short-enums,
    then this leads to linker warnings.  Use the enum __packed attribute for
    the relevent enums to avoid the -fshort-enums compiler option.  This
    attribute is at least available on GCC, LLVM/clang and the Intel
    compiler.
    
    Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>

Diff:
---
 newlib/libc/stdio/Makefile.am  | 33 ++++++++++++-----------------
 newlib/libc/stdio/Makefile.in  | 48 +++++++++++++++++++++++++-----------------
 newlib/libc/stdio/local.h      |  6 +++---
 newlib/libc/stdlib/Makefile.am |  2 --
 newlib/libc/stdlib/Makefile.in |  2 --
 newlib/libc/stdlib/mbtowc_r.c  |  6 +++---
 6 files changed, 49 insertions(+), 48 deletions(-)

diff --git a/newlib/libc/stdio/Makefile.am b/newlib/libc/stdio/Makefile.am
index ea23de6..943a0d5 100644
--- a/newlib/libc/stdio/Makefile.am
+++ b/newlib/libc/stdio/Makefile.am
@@ -16,6 +16,8 @@ GENERAL_INT_FORMATTED_IO_SOURCES = \
 	siscanf.c			\
 	sniprintf.c			\
 	vdiprintf.c			\
+	vfprintf.c			\
+	vfwprintf.c			\
 	viprintf.c			\
 	viscanf.c			\
 	vsiprintf.c			\
@@ -205,7 +207,6 @@ LIBADD_OBJS = \
 	$(lpfx)svfiwprintf.$(oext)		\
 	$(lpfx)svfwprintf.$(oext)		\
 	$(lpfx)vfiwprintf.$(oext)		\
-	$(lpfx)vfwprintf.$(oext)		\
 	$(lpfx)svfiwscanf.$(oext)		\
 	$(lpfx)svfwscanf.$(oext)		\
 	$(lpfx)vfiwscanf.$(oext)		\
@@ -214,10 +215,10 @@ else
 LIBADD_OBJS = \
 	$(lpfx)svfiprintf.$(oext) $(lpfx)svfprintf.$(oext) \
 	$(lpfx)svfiscanf.$(oext) $(lpfx)svfscanf.$(oext) \
-	$(lpfx)vfiprintf.$(oext) $(lpfx)vfprintf.$(oext) \
+	$(lpfx)vfiprintf.$(oext) \
 	$(lpfx)vfscanf.$(oext) $(lpfx)vfiscanf.$(oext) \
 	$(lpfx)svfiwprintf.$(oext) $(lpfx)svfwprintf.$(oext) \
-	$(lpfx)vfiwprintf.$(oext) $(lpfx)vfwprintf.$(oext) \
+	$(lpfx)vfiwprintf.$(oext) \
 	$(lpfx)svfiwscanf.$(oext) $(lpfx)svfwscanf.$(oext) \
 	$(lpfx)vfiwscanf.$(oext) $(lpfx)vfwscanf.$(oext)
 endif
@@ -254,44 +255,38 @@ include $(srcdir)/../../Makefile.shared
 if NEWLIB_NANO_FORMATTED_IO
 # Rules compiling small-footprint nano-formatted-io implementation.
 $(lpfx)nano-vfprintf.$(oext): nano-vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf.c -o $@
+	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf.c -o $@
 
 $(lpfx)nano-vfprintf_i.$(oext): nano-vfprintf_i.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf_i.c -o $@
+	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf_i.c -o $@
 
 $(lpfx)nano-vfprintf_float.$(oext): nano-vfprintf_float.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf_float.c -o $@
+	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf_float.c -o $@
 
 $(lpfx)nano-svfprintf.$(oext): nano-vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/nano-vfprintf.c -o $@
+	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/nano-vfprintf.c -o $@
 endif
 
 # This rule is needed so that libtool compiles vfiprintf before vfprintf.
 # Otherwise libtool moves vfprintf.o and subsequently can't find it.
 
-$(lpfx)vfprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/vfprintf.c -o $@
-
 $(lpfx)vfiprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -c $(srcdir)/vfprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)svfprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
+	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)svfiprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
-
-$(lpfx)vfwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)vfiwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 $(lpfx)svfwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 $(lpfx)svfiwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 if NEWLIB_NANO_FORMATTED_IO
 # Rules compiling small-footprint nano-formatted-io implementation.
diff --git a/newlib/libc/stdio/Makefile.in b/newlib/libc/stdio/Makefile.in
index 8ea5f0a..15aad34 100644
--- a/newlib/libc/stdio/Makefile.in
+++ b/newlib/libc/stdio/Makefile.in
@@ -80,6 +80,8 @@ lib_a_AR = $(AR) $(ARFLAGS)
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-siscanf.$(OBJEXT) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-sniprintf.$(OBJEXT) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-vdiprintf.$(OBJEXT) \
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-vfprintf.$(OBJEXT) \
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-vfwprintf.$(OBJEXT) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-viprintf.$(OBJEXT) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-viscanf.$(OBJEXT) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	lib_a-vsiprintf.$(OBJEXT) \
@@ -192,6 +194,7 @@ LTLIBRARIES = $(noinst_LTLIBRARIES)
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	iprintf.lo iscanf.lo \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	siprintf.lo siscanf.lo \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	sniprintf.lo vdiprintf.lo \
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	vfprintf.lo vfwprintf.lo \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	viprintf.lo viscanf.lo \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	vsiprintf.lo vsiscanf.lo \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	vsniprintf.lo
@@ -450,6 +453,8 @@ INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	siscanf.c			\
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	sniprintf.c			\
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	vdiprintf.c			\
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	vfprintf.c			\
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	vfwprintf.c			\
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	viprintf.c			\
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	viscanf.c			\
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	vsiprintf.c			\
@@ -608,10 +613,10 @@ GENERAL_SOURCES = \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@LIBADD_OBJS = \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)svfiprintf.$(oext) $(lpfx)svfprintf.$(oext) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)svfiscanf.$(oext) $(lpfx)svfscanf.$(oext) \
-@NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfiprintf.$(oext) $(lpfx)vfprintf.$(oext) \
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfiprintf.$(oext) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfscanf.$(oext) $(lpfx)vfiscanf.$(oext) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)svfiwprintf.$(oext) $(lpfx)svfwprintf.$(oext) \
-@NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfiwprintf.$(oext) $(lpfx)vfwprintf.$(oext) \
+@NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfiwprintf.$(oext) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)svfiwscanf.$(oext) $(lpfx)svfwscanf.$(oext) \
 @NEWLIB_NANO_FORMATTED_IO_FALSE@	$(lpfx)vfiwscanf.$(oext) $(lpfx)vfwscanf.$(oext)
 
@@ -627,7 +632,6 @@ GENERAL_SOURCES = \
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)svfiwprintf.$(oext)		\
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)svfwprintf.$(oext)		\
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)vfiwprintf.$(oext)		\
-@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)vfwprintf.$(oext)		\
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)svfiwscanf.$(oext)		\
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)svfwscanf.$(oext)		\
 @NEWLIB_NANO_FORMATTED_IO_TRUE@	$(lpfx)vfiwscanf.$(oext)		\
@@ -863,6 +867,18 @@ lib_a-vdiprintf.o: vdiprintf.c
 lib_a-vdiprintf.obj: vdiprintf.c
 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-vdiprintf.obj `if test -f 'vdiprintf.c'; then $(CYGPATH_W) 'vdiprintf.c'; else $(CYGPATH_W) '$(srcdir)/vdiprintf.c'; fi`
 
+lib_a-vfprintf.o: vfprintf.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-vfprintf.o `test -f 'vfprintf.c' || echo '$(srcdir)/'`vfprintf.c
+
+lib_a-vfprintf.obj: vfprintf.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-vfprintf.obj `if test -f 'vfprintf.c'; then $(CYGPATH_W) 'vfprintf.c'; else $(CYGPATH_W) '$(srcdir)/vfprintf.c'; fi`
+
+lib_a-vfwprintf.o: vfwprintf.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-vfwprintf.o `test -f 'vfwprintf.c' || echo '$(srcdir)/'`vfwprintf.c
+
+lib_a-vfwprintf.obj: vfwprintf.c
+	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-vfwprintf.obj `if test -f 'vfwprintf.c'; then $(CYGPATH_W) 'vfwprintf.c'; else $(CYGPATH_W) '$(srcdir)/vfwprintf.c'; fi`
+
 lib_a-viprintf.o: viprintf.c
 	$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-viprintf.o `test -f 'viprintf.c' || echo '$(srcdir)/'`viprintf.c
 
@@ -1882,43 +1898,37 @@ docbook: $(DOCBOOK_OUT_FILES)
 
 # Rules compiling small-footprint nano-formatted-io implementation.
 @NEWLIB_NANO_FORMATTED_IO_TRUE@$(lpfx)nano-vfprintf.$(oext): nano-vfprintf.c
-@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf.c -o $@
+@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf.c -o $@
 
 @NEWLIB_NANO_FORMATTED_IO_TRUE@$(lpfx)nano-vfprintf_i.$(oext): nano-vfprintf_i.c
-@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf_i.c -o $@
+@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf_i.c -o $@
 
 @NEWLIB_NANO_FORMATTED_IO_TRUE@$(lpfx)nano-vfprintf_float.$(oext): nano-vfprintf_float.c
-@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/nano-vfprintf_float.c -o $@
+@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -c $(srcdir)/nano-vfprintf_float.c -o $@
 
 @NEWLIB_NANO_FORMATTED_IO_TRUE@$(lpfx)nano-svfprintf.$(oext): nano-vfprintf.c
-@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/nano-vfprintf.c -o $@
+@NEWLIB_NANO_FORMATTED_IO_TRUE@	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/nano-vfprintf.c -o $@
 
 # This rule is needed so that libtool compiles vfiprintf before vfprintf.
 # Otherwise libtool moves vfprintf.o and subsequently can't find it.
 
-$(lpfx)vfprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/vfprintf.c -o $@
-
 $(lpfx)vfiprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -c $(srcdir)/vfprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)svfprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
+	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)svfiprintf.$(oext): vfprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
-
-$(lpfx)vfwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfprintf.c -o $@
 
 $(lpfx)vfiwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 $(lpfx)svfwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 $(lpfx)svfiwprintf.$(oext): vfwprintf.c
-	$(LIB_COMPILE) -fshort-enums -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
+	$(LIB_COMPILE) -DINTEGER_ONLY -DSTRING_ONLY -c $(srcdir)/vfwprintf.c -o $@
 
 # Rules compiling small-footprint nano-formatted-io implementation.
 @NEWLIB_NANO_FORMATTED_IO_TRUE@$(lpfx)nano-vfscanf.$(oext): nano-vfscanf.c
diff --git a/newlib/libc/stdio/local.h b/newlib/libc/stdio/local.h
index 471442e..5f69955 100644
--- a/newlib/libc/stdio/local.h
+++ b/newlib/libc/stdio/local.h
@@ -306,7 +306,7 @@ _VOID _EXFUN(__sinit_lock_release,(_VOID));
 /* Types used in positional argument support in vfprinf/vfwprintf.
    The implementation is char/wchar_t dependent but the class and state
    tables are only defined once in vfprintf.c. */
-typedef enum {
+typedef enum __packed {
   ZERO,   /* '0' */
   DIGIT,  /* '1-9' */
   DOLLAR, /* '$' */
@@ -319,7 +319,7 @@ typedef enum {
   MAX_CH_CLASS /* place-holder */
 } __CH_CLASS;
 
-typedef enum {
+typedef enum __packed {
   START,  /* start */
   SFLAG,  /* seen a flag */
   WDIG,   /* seen digits in width area */
@@ -335,7 +335,7 @@ typedef enum {
   MAX_STATE, /* place-holder */
 } __STATE;
 
-typedef enum {
+typedef enum __packed {
   NOOP,  /* do nothing */
   NUMBER, /* build a number from digits */
   SKIPNUM, /* skip over digits */
diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am
index 2d45d10..fb2e44e 100644
--- a/newlib/libc/stdlib/Makefile.am
+++ b/newlib/libc/stdlib/Makefile.am
@@ -307,8 +307,6 @@ $(lpfx)dtoa.$(oext): dtoa.c mprec.h
 $(lpfx)ldtoa.$(oext): ldtoa.c mprec.h
 $(lpfx)ecvtbuf.$(oext): ecvtbuf.c mprec.h
 $(lpfx)mbtowc_r.$(oext): mbtowc_r.c mbctype.h
-	$(LIB_COMPILE) -c -fshort-enums $(srcdir)/mbtowc_r.c -o $@
-
 $(lpfx)mprec.$(oext): mprec.c mprec.h
 $(lpfx)strtod.$(oext): strtod.c mprec.h
 $(lpfx)gdtoa-gethex.$(oext): gdtoa-gethex.c mprec.h
diff --git a/newlib/libc/stdlib/Makefile.in b/newlib/libc/stdlib/Makefile.in
index 466ab6d..b4b70b4 100644
--- a/newlib/libc/stdlib/Makefile.in
+++ b/newlib/libc/stdlib/Makefile.in
@@ -1560,8 +1560,6 @@ $(lpfx)dtoa.$(oext): dtoa.c mprec.h
 $(lpfx)ldtoa.$(oext): ldtoa.c mprec.h
 $(lpfx)ecvtbuf.$(oext): ecvtbuf.c mprec.h
 $(lpfx)mbtowc_r.$(oext): mbtowc_r.c mbctype.h
-	$(LIB_COMPILE) -c -fshort-enums $(srcdir)/mbtowc_r.c -o $@
-
 $(lpfx)mprec.$(oext): mprec.c mprec.h
 $(lpfx)strtod.$(oext): strtod.c mprec.h
 $(lpfx)gdtoa-gethex.$(oext): gdtoa-gethex.c mprec.h
diff --git a/newlib/libc/stdlib/mbtowc_r.c b/newlib/libc/stdlib/mbtowc_r.c
index 116b4d8..9d78256 100644
--- a/newlib/libc/stdlib/mbtowc_r.c
+++ b/newlib/libc/stdlib/mbtowc_r.c
@@ -55,11 +55,11 @@ _DEFUN (__ascii_mbtowc, (r, pwc, s, n, state),
 }
 
 #ifdef _MB_CAPABLE
-typedef enum { ESCAPE, DOLLAR, BRACKET, AT, B, J, 
+typedef enum __packed { ESCAPE, DOLLAR, BRACKET, AT, B, J,
                NUL, JIS_CHAR, OTHER, JIS_C_NUM } JIS_CHAR_TYPE;
-typedef enum { ASCII, JIS, A_ESC, A_ESC_DL, JIS_1, J_ESC, J_ESC_BR,
+typedef enum __packed { ASCII, JIS, A_ESC, A_ESC_DL, JIS_1, J_ESC, J_ESC_BR,
                INV, JIS_S_NUM } JIS_STATE; 
-typedef enum { COPY_A, COPY_J1, COPY_J2, MAKE_A, NOOP, EMPTY, ERROR } JIS_ACTION;
+typedef enum __packed { COPY_A, COPY_J1, COPY_J2, MAKE_A, NOOP, EMPTY, ERROR } JIS_ACTION;
 
 /************************************************************************************** 
  * state/action tables for processing JIS encoding


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