[MIPS] Unite mipsel and mips64el 4.9 gcc toolchains

Use 4.9 mips64el toolchain for both 64- and 32-bit builds.
Tell ld when 32-bit links are required.
Override 4.9's changed defaults for mips floating point
register use, to get same assembler rules as 4.8 and earlier.

Also: drop unused  soft-fp build targets, cleanout redundant
compiler options, and remove extraneous Android.mk file.

Change-Id: I86f1075266349edb2b08a7709b9f5472d8cfda32

12 files changed, 21 insertions, 130 deletions

diff --git a/core/combo/TARGET_linux-mips.mk b/core/combo/TARGET_linux-mips.mk
index d702cc5..cb1e19d 100644
--- a/core/combo/TARGET_linux-mips.mk
+++ b/core/combo/TARGET_linux-mips.mk
@@ -38,7 +38,7 @@ endif
 $(combo_2nd_arch_prefix)TARGET_NDK_GCC_VERSION := 4.8
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.8
+$(combo_2nd_arch_prefix)TARGET_GCC_VERSION := 4.9
 else
 $(combo_2nd_arch_prefix)TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
@@ -52,8 +52,8 @@ include $(TARGET_ARCH_SPECIFIC_MAKEFILE)
 
 # You can set TARGET_TOOLS_PREFIX to get gcc from somewhere else
 ifeq ($(strip $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)),)
-$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mipsel-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
-$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/mipsel-linux-android-
+$(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT := prebuilts/gcc/$(HOST_PREBUILT_TAG)/mips/mips64el-linux-android-$($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)
+$(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX := $($(combo_2nd_arch_prefix)TARGET_TOOLCHAIN_ROOT)/bin/mips64el-linux-android-
 endif
 
 $(combo_2nd_arch_prefix)TARGET_CC := $($(combo_2nd_arch_prefix)TARGET_TOOLS_PREFIX)gcc$(HOST_EXECUTABLE_SUFFIX)
@@ -96,24 +96,6 @@ $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += \
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))
 
-# This warning causes dalvik not to build with gcc 4.6+ and -Werror.
-# We cannot turn it off blindly since the option is not available
-# in gcc-4.4.x.
-ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $($(combo_2nd_arch_prefix)TARGET_GCC_VERSION)),)
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable \
-                        -fno-strict-volatile-bitfields
-endif
-
-# This is to avoid the dreaded warning compiler message:
-#   note: the mangling of 'va_list' has changed in GCC 4.4
-#
-# The fact that the mangling changed does not affect the NDK ABI
-# very fortunately (since none of the exposed APIs used va_list
-# in their exported C++ functions). Also, GCC 4.5 has already
-# removed the warning from the compiler.
-#
-$(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -Wno-psabi
-
 ifneq ($(ARCH_MIPS_PAGE_SHIFT),)
 $(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS += -DPAGE_SHIFT=$(ARCH_MIPS_PAGE_SHIFT)
 endif
diff --git a/core/combo/TARGET_linux-mips64.mk b/core/combo/TARGET_linux-mips64.mk
index 1b07847..cb607a0 100644
--- a/core/combo/TARGET_linux-mips64.mk
+++ b/core/combo/TARGET_linux-mips64.mk
@@ -38,7 +38,7 @@ endif
 TARGET_NDK_GCC_VERSION := 4.8
 
 ifeq ($(strip $(TARGET_GCC_VERSION_EXP)),)
-TARGET_GCC_VERSION := 4.8
+TARGET_GCC_VERSION := 4.9
 else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
@@ -96,24 +96,6 @@ TARGET_GLOBAL_CFLAGS += \
 			-include $(android_config_h) \
 			-I $(dir $(android_config_h))
 
-# This warning causes dalvik not to build with gcc 4.6+ and -Werror.
-# We cannot turn it off blindly since the option is not available
-# in gcc-4.4.x.
-ifneq ($(filter 4.6 4.6.% 4.7 4.7.% 4.8, $(TARGET_GCC_VERSION)),)
-TARGET_GLOBAL_CFLAGS += -Wno-unused-but-set-variable \
-                        -fno-strict-volatile-bitfields
-endif
-
-# This is to avoid the dreaded warning compiler message:
-#   note: the mangling of 'va_list' has changed in GCC 4.4
-#
-# The fact that the mangling changed does not affect the NDK ABI
-# very fortunately (since none of the exposed APIs used va_list
-# in their exported C++ functions). Also, GCC 4.5 has already
-# removed the warning from the compiler.
-#
-TARGET_GLOBAL_CFLAGS += -Wno-psabi
-
 ifneq ($(ARCH_MIPS_PAGE_SHIFT),)
 TARGET_GLOBAL_CFLAGS += -DPAGE_SHIFT=$(ARCH_MIPS_PAGE_SHIFT)
 endif
diff --git a/core/combo/arch/mips/mips32-fp.mk b/core/combo/arch/mips/mips32-fp.mk
index e60bdac..8320e93 100644
--- a/core/combo/arch/mips/mips32-fp.mk
+++ b/core/combo/arch/mips/mips32-fp.mk
@@ -4,11 +4,9 @@
 ARCH_MIPS_HAS_FPU	:=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips32 \
-    -mtune=mips32 \
     -mips32 \
-    -mhard-float
+    -mfp32 \
+    -modd-spreg \
 
 arch_variant_ldflags := \
-    -EL
+    -Wl,-melf32ltsmip
diff --git a/core/combo/arch/mips/mips32.mk b/core/combo/arch/mips/mips32.mk
deleted file mode 100644
index 35ef0d8..0000000
--- a/core/combo/arch/mips/mips32.mk
+++ /dev/null
@@ -1,12 +0,0 @@
-# Configuration for Android on MIPS.
-# Generating binaries for MIPS32/soft-float/little-endian
-
-arch_variant_cflags := \
-    -EL \
-    -march=mips32 \
-    -mtune=mips32 \
-    -mips32 \
-    -msoft-float
-
-arch_variant_ldflags := \
-    -EL
diff --git a/core/combo/arch/mips/mips32r2-fp-xburst.mk b/core/combo/arch/mips/mips32r2-fp-xburst.mk
index 8b0fef1..2b4f714 100644
--- a/core/combo/arch/mips/mips32r2-fp-xburst.mk
+++ b/core/combo/arch/mips/mips32r2-fp-xburst.mk
@@ -5,13 +5,11 @@
 ARCH_MIPS_HAS_FPU :=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
     -mips32r2 \
-    -mhard-float \
+    -mfp32 \
+    -modd-spreg \
     -mno-fused-madd \
     -Wa,-mmxu
 
 arch_variant_ldflags := \
-    -EL
+    -Wl,-melf32ltsmip
diff --git a/core/combo/arch/mips/mips32r2-fp.mk b/core/combo/arch/mips/mips32r2-fp.mk
index 08d91df..9acb018 100644
--- a/core/combo/arch/mips/mips32r2-fp.mk
+++ b/core/combo/arch/mips/mips32r2-fp.mk
@@ -4,12 +4,10 @@
 ARCH_MIPS_HAS_FPU	:=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
     -mips32r2 \
-    -mhard-float \
+    -mfp32 \
+    -modd-spreg \
     -msynci
 
 arch_variant_ldflags := \
-    -EL
+    -Wl,-melf32ltsmip
diff --git a/core/combo/arch/mips/mips32r2.mk b/core/combo/arch/mips/mips32r2.mk
deleted file mode 100644
index 16ce76f..0000000
--- a/core/combo/arch/mips/mips32r2.mk
+++ /dev/null
@@ -1,13 +0,0 @@
-# Configuration for Android on MIPS.
-# Generating binaries for MIPS32R2/soft-float/little-endian
-
-arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
-    -mips32r2 \
-    -msoft-float \
-    -msynci
-
-arch_variant_ldflags := \
-    -EL
diff --git a/core/combo/arch/mips/mips32r2dsp-fp.mk b/core/combo/arch/mips/mips32r2dsp-fp.mk
index fe2b1fe..c4b49b6 100644
--- a/core/combo/arch/mips/mips32r2dsp-fp.mk
+++ b/core/combo/arch/mips/mips32r2dsp-fp.mk
@@ -6,13 +6,11 @@ ARCH_MIPS_DSP_REV	:=1
 ARCH_MIPS_HAS_FPU       :=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
     -mips32r2 \
-    -mhard-float \
+    -mfp32 \
+    -modd-spreg \
     -mdsp \
     -msynci
 
 arch_variant_ldflags := \
-    -EL
+    -Wl,-melf32ltsmip
diff --git a/core/combo/arch/mips/mips32r2dsp.mk b/core/combo/arch/mips/mips32r2dsp.mk
deleted file mode 100644
index 8a8976c..0000000
--- a/core/combo/arch/mips/mips32r2dsp.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-# Configuration for Android on MIPS.
-# Generating binaries for MIPS32R2/soft-float/little-endian/dsp
-
-ARCH_MIPS_HAS_DSP  	:=true
-ARCH_MIPS_DSP_REV	:=1
-
-arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
-    -mips32r2 \
-    -msoft-float \
-    -mdsp \
-    -msynci
-
-arch_variant_ldflags := \
-    -EL
diff --git a/core/combo/arch/mips/mips32r2dspr2-fp.mk b/core/combo/arch/mips/mips32r2dspr2-fp.mk
index 7e882b3..8b05ffc 100644
--- a/core/combo/arch/mips/mips32r2dspr2-fp.mk
+++ b/core/combo/arch/mips/mips32r2dspr2-fp.mk
@@ -6,13 +6,11 @@ ARCH_MIPS_DSP_REV	:=2
 ARCH_MIPS_HAS_FPU       :=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
     -mips32r2 \
-    -mhard-float \
+    -mfp32 \
+    -modd-spreg \
     -mdspr2 \
     -msynci
 
 arch_variant_ldflags := \
-    -EL
+    -Wl,-melf32ltsmip
diff --git a/core/combo/arch/mips/mips32r2dspr2.mk b/core/combo/arch/mips/mips32r2dspr2.mk
deleted file mode 100644
index c311523..0000000
--- a/core/combo/arch/mips/mips32r2dspr2.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-# Configuration for Android on MIPS.
-# Generating binaries for MIPS32R2/soft-float/little-endian/dsp
-
-ARCH_MIPS_HAS_DSP  	:=true
-ARCH_MIPS_DSP_REV	:=2
-
-arch_variant_cflags := \
-    -EL \
-    -march=mips32r2 \
-    -mtune=mips32r2 \
-    -mips32r2 \
-    -msoft-float \
-    -mdspr2 \
-    -msynci
-
-arch_variant_ldflags := \
-    -EL
diff --git a/core/combo/arch/mips64/mips64r2.mk b/core/combo/arch/mips64/mips64r2.mk
index 298aeaf..c5710d0 100644
--- a/core/combo/arch/mips64/mips64r2.mk
+++ b/core/combo/arch/mips64/mips64r2.mk
@@ -1,14 +1,10 @@
 # Configuration for Android on mips64r2.
 
+# This target is for temporary use only, until mips64r6 is supported by Android's qemu.
+
 ARCH_MIPS_HAS_FPU	:=true
 ARCH_HAVE_ALIGNED_DOUBLES :=true
 arch_variant_cflags := \
-    -EL \
-    -march=mips64r2 \
-    -mtune=mips64r2 \
     -mips64r2 \
-    -mhard-float \
     -msynci
 
-arch_variant_ldflags := \
-    -EL