[PATCH 4 of 4] cc/gcc: add MIPS spercific configure options

["Yann E. MORIN" <yann dot morin dot 1998 at anciens dot enib dot fr>]

# HG changeset patch
# User "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
# Date 1309190690 -7200
# Node ID c412d5cc58402ebcd12fa44a3d1b65fa96e2953d
# Parent  9d62710aa7ce46782da2cc122477b5350ca7c82b
cc/gcc: add MIPS spercific configure options

Add the following MIPS specific options when configuring gcc:
  --with(out)-llsc
  --with(out)-synci
  --with(out)-mips-plt
  --with-divide=type

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
--- a/config/cc/gcc.in.2
+++ b/config/cc/gcc.in.2
@@ -250,3 +250,15 @@
     default "sysv"  if CC_GCC_LNK_HASH_STYLE_SYSV
     default "gnu"   if CC_GCC_LNK_HASH_STYLE_GNU
     default "both"  if CC_GCC_LNK_HASH_STYLE_BOTH
+
+#-----------------------------------------------------------------------------
+
+config CC_GCC_HAS_ARCH_OPTIONS
+    bool
+
+comment "archictecture-specific options"
+    depends on CC_GCC_HAS_ARCH_OPTIONS
+
+if ARCH_mips
+source "config/cc/gcc.in.mips"
+endif # ARCH_mips
diff --git a/config/cc/gcc.in.mips b/config/cc/gcc.in.mips
new file mode 100644
--- /dev/null
+++ b/config/cc/gcc.in.mips
@@ -0,0 +1,34 @@
+# MIPS specific options for gcc
+
+config CC_GCC_HAS_ARCH_OPTIONS
+    default y
+
+config CC_GCC_mips_llsc
+    tristate
+    prompt "Use llsc"
+    default m
+    help
+      This configures how gcc will emit load-lock and store-conditional
+      opcodes. Normally, you'd set this to 'M', and configure will do the
+      correct thing (ie. enable llsc for Linux-based targets, disable for
+      others). If you know better, you can force either using llsc or not
+      using it (resp. 'Y' or 'N').
+
+config CC_GCC_mips_synci
+    tristate
+    prompt "Use synci"
+    default m
+    help
+      This configures how gcc will emit the synci opcode. Normally, you'd
+      set this to 'M', and configure will do the correct thing (ie. disable).
+      If you know better, you can force using synci (say 'Y'), or not using
+      it (say 'N').
+
+config CC_GCC_mips_plt
+    bool
+    prompt "Use copy relocations & PLTs"
+    help
+      This configures gcc to use copy relocations & PLTs. These are
+      extensions to the traditional SVR4-based MIPS ABIs and require
+      support from GNU binutils and the runtime C library.
+      Say 'N' to keep the default and not use them, say 'Y' to use them.
diff --git a/scripts/build/cc/gcc.sh b/scripts/build/cc/gcc.sh
--- a/scripts/build/cc/gcc.sh
+++ b/scripts/build/cc/gcc.sh
@@ -267,6 +267,22 @@
         *)  extra_config+=( "--with-linker-hash-style=${CT_CC_GCC_LNK_HASH_STYLE}" );;
     esac
 
+    case "${CT_CC_GCC_mips_llsc}" in
+        y)  extra_config+=( --with-llsc );;
+        m)  ;;
+        *)  extra_config+=( --without-llsc );;
+    esac
+
+    case "${CT_CC_GCC_mips_synci}" in
+        y)  extra_config+=( --with-synci );;
+        m)  ;;
+        *)  extra_config+=( --without-synci );;
+    esac
+
+    if [ "${CT_CC_GCC_mips_plt}" ]; then
+        extra_config+=( --with-mips-plt )
+    fi
+
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
     # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
@@ -545,6 +561,22 @@
         *)  extra_config+=( "--with-linker-hash-style=${CT_CC_GCC_LNK_HASH_STYLE}" );;
     esac
 
+    case "${CT_CC_GCC_mips_llsc}" in
+        y)  extra_config+=( --with-llsc );;
+        m)  ;;
+        *)  extra_config+=( --without-llsc );;
+    esac
+
+    case "${CT_CC_GCC_mips_synci}" in
+        y)  extra_config+=( --with-synci );;
+        m)  ;;
+        *)  extra_config+=( --without-synci );;
+    esac
+
+    if [ "${CT_CC_GCC_mips_plt}" ]; then
+        extra_config+=( --with-mips-plt )
+    fi
+
     if [ "${CT_CC_GCC_ENABLE_PLUGINS}" = "y" ]; then
         extra_config+=( --enable-plugin )
     fi

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