[Patch, MIPS] Cleanup mips header files.

["Steve Ellcey " <sellcey at mips dot com>]

I would like to do some cleanup on the mips configuration code, both to
reduce the amount of duplicated code and to add better support for --with-arch,
--with-endian, and --with-abi.  As the first step in this work I would like
to check in this patch that removes the linux64.h and gnu-user64.h header
files and copies the needed pieces to linux.h and gnu-user.h.

Right now these headers are used when building a mips64* target or if you
use --enable-target=all, but there is no reason they can't be used for normal
32 bit mips targets too.  Then the only thing has to be done differently for
mips64* targets (or --enable-target=all) vs. mips 32 bit targets is to add
the multilib makefile fragment (t-linux64).

Most of the changes here are just moving macros from one file to another.
The only real functional changes are with GNU_USER_TARGET_LINK_SPEC and
LINUX_DRIVER_SELF_SPECS where we pass more explicit options to the linker
and now have a single consistent definition of these macros for all mips
targets instead of different ones for mips32 and mips64.

I built multiple different mips*-*-linux-gnu targets to test this change
but there are a lot of combinations and I couldn't build all of them.

OK for checkin?

Steve Ellcey
sellcey@mips.com



2014-09-26  Steve Ellcey  <sellcey@mips.com>

	* config/mips/linux64.h: Remove.
	* config/mips/gnu-user64.h: Remove.
	* gcc.config (mips*-*-*): Remove references to linux64.h and
	gnu-user64.h
	* config/mips/gnu-user.h (GNU_USER_TARGET_LINK_SPEC): Replace
	with modified version from gnu-user64.h.
	(LINUX_DRIVER_SELF_SPECS): Update parts from gnu-user64.h.
	(LOCAL_LABEL_PREFIX): Copy from gnu-user64.h.
	* config/mips/linux.h (GNU_USER_LINK_EMULATION32): Copy from
	linux64.h.
	(GNU_USER_LINK_EMULATION64): Ditto.
	(GNU_USER_LINK_EMULATIONN32): Ditto.
	(GLIBC_DYNAMIC_LINKER32): Ditto.
	(GLIBC_DYNAMIC_LINKER64): Ditto.
	(GLIBC_DYNAMIC_LINKERN32): Ditto.
	(UCLIBC_DYNAMIC_LINKER32): Ditto.
	(UCLIBC_DYNAMIC_LINKER64): Ditto.
	(UCLIBC_DYNAMIC_LINKERN32): Ditto.
	(BIONIC_DYNAMIC_LINKERN32): Ditto.
	(GNU_USER_DYNAMIC_LINKERN32): Ditto.
	(GLIBC_DYNAMIC_LINKER): Delete.
	(UCLIBC_DYNAMIC_LINKER): Delete.


diff --git a/gcc/config.gcc b/gcc/config.gcc
index 0e50e9a..ce06656 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1941,7 +1941,7 @@ mips*-*-netbsd*)			# NetBSD/mips, either endian.
 	extra_options="${extra_options} netbsd.opt netbsd-elf.opt"
 	;;
 mips*-mti-linux*)
-	tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file} mips/gnu-user.h mips/gnu-user64.h mips/linux64.h mips/linux-common.h mips/mti-linux.h"
+	tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file} mips/gnu-user.h mips/linux.h mips/linux-common.h mips/mti-linux.h"
 	extra_options="${extra_options} linux-android.opt"
 	tmake_file="${tmake_file} mips/t-mti-linux"
 	tm_defines="${tm_defines} MIPS_ISA_DEFAULT=33 MIPS_ABI_DEFAULT=ABI_32"
@@ -1949,7 +1949,7 @@ mips*-mti-linux*)
 	gas=yes
 	;;
 mips64*-*-linux* | mipsisa64*-*-linux*)
-	tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file} mips/gnu-user.h mips/gnu-user64.h mips/linux64.h mips/linux-common.h"
+	tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file} mips/gnu-user.h mips/linux.h mips/linux-common.h"
 	extra_options="${extra_options} linux-android.opt"
 	tmake_file="${tmake_file} mips/t-linux64"
 	tm_defines="${tm_defines} MIPS_ABI_DEFAULT=ABI_N32"
@@ -1973,7 +1973,6 @@ mips*-*-linux*)				# Linux MIPS, either endian.
 	tm_file="dbxelf.h elfos.h gnu-user.h linux.h linux-android.h glibc-stdint.h ${tm_file} mips/gnu-user.h mips/linux.h"
 	extra_options="${extra_options} linux-android.opt"
 	if test x$enable_targets = xall; then
-		tm_file="${tm_file} mips/gnu-user64.h mips/linux64.h"
 		tmake_file="${tmake_file} mips/t-linux64"
 	fi
 	tm_file="${tm_file} mips/linux-common.h"
diff --git a/gcc/config/mips/gnu-user.h b/gcc/config/mips/gnu-user.h
index 638d7f0..3bb2248 100644
--- a/gcc/config/mips/gnu-user.h
+++ b/gcc/config/mips/gnu-user.h
@@ -52,16 +52,20 @@ along with GCC; see the file COPYING3.  If not see
 #undef MIPS_DEFAULT_GVALUE
 #define MIPS_DEFAULT_GVALUE 0
 
-/* Borrowed from sparc/linux.h */
 #undef GNU_USER_TARGET_LINK_SPEC
-#define GNU_USER_TARGET_LINK_SPEC \
- "%(endian_spec) \
-  %{shared:-shared} \
+#define GNU_USER_TARGET_LINK_SPEC "\
+%{G*} %{EB} %{EL} %{!EB:%{!EL:%(endian_spec)}} %{mips*} \
+%{shared} \
   %{!shared: \
     %{!static: \
       %{rdynamic:-export-dynamic} \
-      -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
-      %{static:-static}}"
+      %{mabi=n32: -dynamic-linker " GNU_USER_DYNAMIC_LINKERN32 "} \
+      %{mabi=64: -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
+      %{mabi=32: -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \
+    %{static:-static}} \
+%{mabi=n32:-m" GNU_USER_LINK_EMULATIONN32 "} \
+%{mabi=64:-m" GNU_USER_LINK_EMULATION64 "} \
+%{mabi=32:-m" GNU_USER_LINK_EMULATION32 "}"
 #undef LINK_SPEC
 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
 
@@ -122,7 +126,9 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
      specs handling by removing a redundant option.  */			\
   "%{!mno-shared:%<mplt}",						\
   /* -mplt likewise has no effect for -mabi=64 without -msym32.  */	\
-  "%{mabi=64:%{!msym32:%<mplt}}"
+  "%{mabi=64:%{!msym32:%<mplt}}"					\
+  " %{!EB:%{!EL:%(endian_spec)}}"					\
+  " %{!mabi=*: -" MULTILIB_ABI_DEFAULT "}"
 
 #undef DRIVER_SELF_SPECS
 #define DRIVER_SELF_SPECS \
@@ -137,3 +143,6 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
 #define ENDFILE_SPEC \
   GNU_USER_TARGET_MATHFILE_SPEC " " \
   GNU_USER_TARGET_ENDFILE_SPEC
+
+#undef LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".")
diff --git a/gcc/config/mips/linux.h b/gcc/config/mips/linux.h
index e539422..a117f90 100644
--- a/gcc/config/mips/linux.h
+++ b/gcc/config/mips/linux.h
@@ -17,9 +17,27 @@ You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
-#define GLIBC_DYNAMIC_LINKER \
+#define GNU_USER_LINK_EMULATION32 "elf32%{EB:b}%{EL:l}tsmip"
+#define GNU_USER_LINK_EMULATION64 "elf64%{EB:b}%{EL:l}tsmip"
+#define GNU_USER_LINK_EMULATIONN32 "elf32%{EB:b}%{EL:l}tsmipn32"
+
+#define GLIBC_DYNAMIC_LINKER32 \
   "%{mnan=2008:/lib/ld-linux-mipsn8.so.1;:/lib/ld.so.1}"
+#define GLIBC_DYNAMIC_LINKER64 \
+  "%{mnan=2008:/lib64/ld-linux-mipsn8.so.1;:/lib64/ld.so.1}"
+#define GLIBC_DYNAMIC_LINKERN32 \
+  "%{mnan=2008:/lib32/ld-linux-mipsn8.so.1;:/lib32/ld.so.1}"
 
-#undef UCLIBC_DYNAMIC_LINKER
-#define UCLIBC_DYNAMIC_LINKER \
+#undef UCLIBC_DYNAMIC_LINKER32
+#define UCLIBC_DYNAMIC_LINKER32 \
   "%{mnan=2008:/lib/ld-uClibc-mipsn8.so.0;:/lib/ld-uClibc.so.0}"
+#undef UCLIBC_DYNAMIC_LINKER64
+#define UCLIBC_DYNAMIC_LINKER64 \
+  "%{mnan=2008:/lib/ld64-uClibc-mipsn8.so.0;:/lib/ld64-uClibc.so.0}"
+#define UCLIBC_DYNAMIC_LINKERN32 \
+  "%{mnan=2008:/lib32/ld-uClibc-mipsn8.so.0;:/lib32/ld-uClibc.so.0}"
+
+#define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32"
+#define GNU_USER_DYNAMIC_LINKERN32 \
+  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
+                         BIONIC_DYNAMIC_LINKERN32)