Super-H multilib toolchain fixes

1. On SuperH, configuring GCC with explicit variant of the CPU
(like "sh4") limits the default set of multilibs to just that CPU
and requires --with-multilib-list to change. Allow for "unspecified"
variant, so that we can defer to GCC to determine the list.

2. Support toolchains with both endiannesses at the same time.

3. Add a SuperH/newlib sample

4. Add more flags processing for uClibc

Signed-off-by: Alexey Neyman <stilor@att.net>

7 files changed, 81 insertions, 12 deletions

diff --git a/config/arch/arm.in b/config/arch/arm.in
index 269310d6..72c329f0 100644
--- a/config/arch/arm.in
+++ b/config/arch/arm.in
@@ -5,7 +5,7 @@
 ## select ARCH_DEFAULT_32
 ## select ARCH_SUPPORTS_BOTH_MMU
 ## select ARCH_DEFAULT_HAS_MMU
-## select ARCH_SUPPORTS_BOTH_ENDIAN
+## select ARCH_SUPPORTS_EITHER_ENDIAN
 ## select ARCH_DEFAULT_LE
 ## select ARCH_SUPPORTS_WITH_ARCH
 ## select ARCH_SUPPORTS_WITH_CPU
diff --git a/config/arch/microblaze.in b/config/arch/microblaze.in
index d2360077..8c73b00a 100644
--- a/config/arch/microblaze.in
+++ b/config/arch/microblaze.in
@@ -2,9 +2,9 @@
 
 ## depends on EXPERIMENTAL
 ##
-## select ARCH_SUPPORT_ARCH
+## select ARCH_SUPPORTS_WITH_CPU
 ## select ARCH_FLOAT_SW
-## select ARCH_SUPPORTS_BOTH_ENDIAN
+## select ARCH_SUPPORTS_EITHER_ENDIAN
 ## select ARCH_DEFAULT_BE
 ## select ARCH_SUPPORTS_BOTH_MMU
 ## select ARCH_DEFAULT_HAS_MMU
diff --git a/config/arch/mips.in b/config/arch/mips.in
index 850fe113..8cc68dc1 100644
--- a/config/arch/mips.in
+++ b/config/arch/mips.in
@@ -4,7 +4,7 @@
 ## select ARCH_SUPPORTS_64
 ## select ARCH_DEFAULT_32
 ## select ARCH_USE_MMU
-## select ARCH_SUPPORTS_BOTH_ENDIAN
+## select ARCH_SUPPORTS_EITHER_ENDIAN
 ## select ARCH_DEFAULT_BE
 ## select ARCH_SUPPORTS_WITH_ARCH
 ## select ARCH_SUPPORTS_WITH_TUNE
diff --git a/config/arch/powerpc.in b/config/arch/powerpc.in
index 276438f4..ae10e2db 100644
--- a/config/arch/powerpc.in
+++ b/config/arch/powerpc.in
@@ -3,7 +3,7 @@
 ## select ARCH_SUPPORTS_32
 ## select ARCH_SUPPORTS_64
 ## select ARCH_DEFAULT_32
-## select ARCH_SUPPORTS_BOTH_ENDIAN
+## select ARCH_SUPPORTS_EITHER_ENDIAN
 ## select ARCH_DEFAULT_BE
 ## select ARCH_USE_MMU
 ## select ARCH_SUPPORTS_WITH_ABI
diff --git a/config/arch/sh.in b/config/arch/sh.in
index be525b42..bda660cb 100644
--- a/config/arch/sh.in
+++ b/config/arch/sh.in
@@ -3,9 +3,11 @@
 ## select ARCH_SUPPORTS_32
 ## select ARCH_DEFAULT_32
 ## select ARCH_USE_MMU
-## select ARCH_SUPPORTS_BOTH_ENDIAN
-## select ARCH_DEFAULT_LE
+## select ARCH_SUPPORTS_EITHER_ENDIAN
+## select ARCH_DEFAULT_LE_BE
 ## select ARCH_REQUIRES_MULTILIB
+## select ARCH_SUPPORTS_WITH_ENDIAN
+## select ARCH_SUPPORTS_WITH_CPU
 ##
 ## help The Super-H architecture, as defined by:
 ## help     http://www.renesas.com/fmwk.jsp?cnt=superh_family_landing.jsp&fp=/products/mpumcu/superh_family/
@@ -14,10 +16,41 @@ choice
     bool
     prompt "Variant"
 
+# GCC supports both endiannesses even if a specific CPU is selected (so long
+# as that CPU can be both BE/LE), but the binutils (or specifically, ld)
+# configures for both endiannesses only if sh-*-linux target is selected.
+config ARCH_SH_SH
+    bool
+    prompt "unspecified"
+    select ARCH_SUPPORTS_BOTH_ENDIAN
+    help
+      If left unspecified, GCC will determine the set of multilibs to compile automatically
+      based on selected endianness, FPU mode and OS.
+
+config ARCH_SH_SH1
+    bool
+    prompt "sh1"
+
+config ARCH_SH_SH2
+    bool
+    prompt "sh2"
+
+config ARCH_SH_SH2E
+    bool
+    prompt "sh2e"
+
+config ARCH_SH_SH2A
+    bool
+    prompt "sh2a"
+
 config ARCH_SH_SH3
     bool
     prompt "sh3"
 
+config ARCH_SH_SH3E
+    bool
+    prompt "sh3e"
+
 config ARCH_SH_SH4
     bool
     prompt "sh4"
@@ -30,6 +63,12 @@ endchoice
 
 config ARCH_SH_VARIANT
     string
+    default "sh"   if ARCH_SH_SH
+    default "sh1"   if ARCH_SH_SH1
+    default "sh2"   if ARCH_SH_SH2
+    default "sh2e"   if ARCH_SH_SH2E
+    default "sh2a"   if ARCH_SH_SH2A
     default "sh3"   if ARCH_SH_SH3
+    default "sh3e"   if ARCH_SH_SH3E
     default "sh4"   if ARCH_SH_SH4
     default "sh4a"  if ARCH_SH_SH4A
diff --git a/config/arch/xtensa.in b/config/arch/xtensa.in
index bf4fcb67..a376523a 100644
--- a/config/arch/xtensa.in
+++ b/config/arch/xtensa.in
@@ -1,7 +1,7 @@
 # xtensa specific configuration file
 
 ## select ARCH_SUPPORTS_32
-## select ARCH_SUPPORTS_BOTH_ENDIAN
+## select ARCH_SUPPORTS_EITHER_ENDIAN
 ## select ARCH_DEFAULT_LE
 ## select ARCH_SUPPORTS_BOTH_MMU
 ## select ARCH_DEFAULT_HAS_MMU
diff --git a/config/target.in b/config/target.in
index 738f06b1..d3b5f083 100644
--- a/config/target.in
+++ b/config/target.in
@@ -93,8 +93,16 @@ config ARCH_USE_MMU
       have one (eg. ARM Cortex-A8).
 
 #--------------------------------------
+config ARCH_SUPPORTS_EITHER_ENDIAN
+    bool
+    help
+      Architecture allows to select endianness at the time the toolchain is built.
+
 config ARCH_SUPPORTS_BOTH_ENDIAN
     bool
+    select ARCH_SUPPORTS_EITHER_ENDIAN
+    help
+      Toolchain supports both big/little endian.
 
 config ARCH_DEFAULT_BE
     bool
@@ -102,12 +110,22 @@ config ARCH_DEFAULT_BE
 config ARCH_DEFAULT_LE
     bool
 
+config ARCH_DEFAULT_BE_LE
+    bool
+    depends on ARCH_SUPPORTS_BOTH_ENDIAN
+
+config ARCH_DEFAULT_LE_BE
+    bool
+    depends on ARCH_SUPPORTS_BOTH_ENDIAN
+
 choice
     bool
     prompt "Endianness:"
     depends on ARCH_SUPPORTS_BOTH_ENDIAN
     default ARCH_BE if ARCH_DEFAULT_BE
     default ARCH_LE if ARCH_DEFAULT_LE
+    default ARCH_BE_LE if ARCH_DEFAULT_BE_LE
+    default ARCH_LE_BE if ARCH_DEFAULT_LE_BE
 
 config ARCH_BE
     bool
@@ -117,13 +135,23 @@ config ARCH_LE
     bool
     prompt "Little endian"
 
+config ARCH_BE_LE
+    bool
+    prompt "Both, default big endian"
+
+config ARCH_LE_BE
+    bool
+    prompt "Both, default little endian"
+
 endchoice
 
 config ARCH_ENDIAN
     string
-    depends on ARCH_SUPPORTS_BOTH_ENDIAN
-    default "big"       if ARCH_BE
-    default "little"    if ARCH_LE
+    depends on ARCH_SUPPORTS_EITHER_ENDIAN
+    default "big"        if ARCH_BE
+    default "little"     if ARCH_LE
+    default "big,little" if ARCH_BE_LE
+    default "little,big" if ARCH_LE_BE
 
 #--------------------------------------
 config ARCH_SUPPORTS_8
@@ -208,6 +236,9 @@ config ARCH_SUPPORTS_WITH_FLOAT
 config ARCH_SUPPORTS_WITH_FPU
     bool
 
+config ARCH_SUPPORTS_WITH_ENDIAN
+    bool
+
 config ARCH_SUPPORTS_SOFTFP
     bool
 
@@ -396,7 +427,6 @@ config TARGET_LDFLAGS
 
 config ARCH_FLOAT
     string
-    default ""       if ! ARCH_SUPPORTS_WITH_FLOAT
     default "auto"   if ARCH_FLOAT_AUTO
     default "hard"   if ARCH_FLOAT_HW
     default "soft"   if ARCH_FLOAT_SW