Add build mechanism to share common header files between machines

So far the build mechanism in newlib only allowed to either define
machine-specific headers, or headers shared between all machines.
In some cases, architectures are sufficiently alike to share header
files between them, but not with other architectures.  A good example
is ix86 vs. x86_64, which share certain traits with each other, but
not with other architectures.

Introduce a new configure variable called "shared_machine_dir".  This
dir can then be used for headers shared between architectures.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

7 files changed, 13 insertions, 5 deletions

diff --git a/newlib/libm/Makefile.in b/newlib/libm/Makefile.in
index 20fc290..aa374d8 100644
--- a/newlib/libm/Makefile.in
+++ b/newlib/libm/Makefile.in
@@ -287,6 +287,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@
diff --git a/newlib/libm/common/Makefile.in b/newlib/libm/common/Makefile.in
index 8968438..511ae2f 100644
--- a/newlib/libm/common/Makefile.in
+++ b/newlib/libm/common/Makefile.in
@@ -339,6 +339,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@
diff --git a/newlib/libm/complex/Makefile.in b/newlib/libm/complex/Makefile.in
index 20b3b17..cc477fe 100644
--- a/newlib/libm/complex/Makefile.in
+++ b/newlib/libm/complex/Makefile.in
@@ -272,6 +272,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@
diff --git a/newlib/libm/configure b/newlib/libm/configure
index 9b06c69..0c79bb2 100755
--- a/newlib/libm/configure
+++ b/newlib/libm/configure
@@ -639,6 +639,7 @@ OBJDUMP
 DLLTOOL
 SED
 sys_dir
+shared_machine_dir
 machine_dir
 libm_machine_dir
 lpfx
@@ -3818,6 +3819,7 @@ OBJEXT=${oext}
 
 
 
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 $as_echo_n "checking for a sed that does not truncate output... " >&6; }
 if ${ac_cv_path_SED+:} false; then :
@@ -11507,7 +11509,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11510 "configure"
+#line 11512 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11613,7 +11615,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11616 "configure"
+#line 11618 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
diff --git a/newlib/libm/fenv/Makefile.in b/newlib/libm/fenv/Makefile.in
index b2adb82..8811bb8 100644
--- a/newlib/libm/fenv/Makefile.in
+++ b/newlib/libm/fenv/Makefile.in
@@ -233,6 +233,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@
@@ -252,7 +253,7 @@ libcommon_la_LDFLAGS = -Xcompiler -nostdlib
 lib_a_CFLAGS = -fbuiltin -fno-math-errno $(am__append_1)
 @USE_LIBTOOL_TRUE@noinst_LTLIBRARIES = libcommon.la
 @USE_LIBTOOL_TRUE@libcommon_la_SOURCES = $(src)
-@USE_LIBTOOL_FALSE@noinst_DATA =
+@USE_LIBTOOL_FALSE@noinst_DATA = 
 @USE_LIBTOOL_TRUE@noinst_DATA = objectlist.awk.in
 @USE_LIBTOOL_FALSE@noinst_LIBRARIES = lib.a
 @USE_LIBTOOL_FALSE@lib_a_SOURCES = $(src)
@@ -310,7 +311,7 @@ $(am__aclocal_m4_deps):
 
 clean-noinstLIBRARIES:
 	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
-lib.a: $(lib_a_OBJECTS) $(lib_a_DEPENDENCIES) $(EXTRA_lib_a_DEPENDENCIES)
+lib.a: $(lib_a_OBJECTS) $(lib_a_DEPENDENCIES) $(EXTRA_lib_a_DEPENDENCIES) 
 	-rm -f lib.a
 	$(lib_a_AR) lib.a $(lib_a_OBJECTS) $(lib_a_LIBADD)
 	$(RANLIB) lib.a
@@ -323,7 +324,7 @@ clean-noinstLTLIBRARIES:
 	  echo "rm -f \"$${dir}/so_locations\""; \
 	  rm -f "$${dir}/so_locations"; \
 	done
-libcommon.la: $(libcommon_la_OBJECTS) $(libcommon_la_DEPENDENCIES) $(EXTRA_libcommon_la_DEPENDENCIES)
+libcommon.la: $(libcommon_la_OBJECTS) $(libcommon_la_DEPENDENCIES) $(EXTRA_libcommon_la_DEPENDENCIES) 
 	$(libcommon_la_LINK) $(am_libcommon_la_rpath) $(libcommon_la_OBJECTS) $(libcommon_la_LIBADD) $(LIBS)
 
 mostlyclean-compile:
diff --git a/newlib/libm/math/Makefile.in b/newlib/libm/math/Makefile.in
index 7170bf5..7df02c6 100644
--- a/newlib/libm/math/Makefile.in
+++ b/newlib/libm/math/Makefile.in
@@ -318,6 +318,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@
diff --git a/newlib/libm/mathfp/Makefile.in b/newlib/libm/mathfp/Makefile.in
index 383121b..006c198 100644
--- a/newlib/libm/mathfp/Makefile.in
+++ b/newlib/libm/mathfp/Makefile.in
@@ -290,6 +290,7 @@ prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
 sbindir = @sbindir@
+shared_machine_dir = @shared_machine_dir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
 subdirs = @subdirs@