6 files changed, 55 insertions, 2 deletions
diff --git a/arch/Config.in b/arch/Config.in
index 50377a9af8..e921879d01 100644
--- a/arch/Config.in
+++ b/arch/Config.in
@@ -264,6 +264,9 @@ config BR2_GCC_TARGET_ARCH
 config BR2_GCC_TARGET_ABI
 	string
 
+config BR2_GCC_TARGET_NAN
+	string
+
 config BR2_GCC_TARGET_CPU
 	string
 
diff --git a/arch/Config.in.mips b/arch/Config.in.mips
index 4e9ad12ad2..ee1b43862b 100644
--- a/arch/Config.in.mips
+++ b/arch/Config.in.mips
@@ -1,20 +1,26 @@
 # mips default CPU ISAs
 config BR2_MIPS_CPU_MIPS32
 	bool
+	select BR2_MIPS_NAN_LEGACY
 config BR2_MIPS_CPU_MIPS32R2
 	bool
+	select BR2_MIPS_NAN_LEGACY
 config BR2_MIPS_CPU_MIPS32R5
 	bool
 config BR2_MIPS_CPU_MIPS32R6
 	bool
+	select BR2_MIPS_NAN_2008
 config BR2_MIPS_CPU_MIPS64
 	bool
+	select BR2_MIPS_NAN_LEGACY
 config BR2_MIPS_CPU_MIPS64R2
 	bool
+	select BR2_MIPS_NAN_LEGACY
 config BR2_MIPS_CPU_MIPS64R5
 	bool
 config BR2_MIPS_CPU_MIPS64R6
 	bool
+	select BR2_MIPS_NAN_2008
 
 choice
 	prompt "Target Architecture Variant"
@@ -51,6 +57,7 @@ config BR2_mips_m5150
 	bool "M5150"
 	depends on !BR2_ARCH_IS_64
 	select BR2_MIPS_CPU_MIPS32R5
+	select BR2_MIPS_NAN_2008
 config BR2_mips_m6250
 	bool "M6250"
 	depends on !BR2_ARCH_IS_64
@@ -59,6 +66,7 @@ config BR2_mips_p5600
 	bool "P5600"
 	depends on !BR2_ARCH_IS_64
 	select BR2_MIPS_CPU_MIPS32R5
+	select BR2_MIPS_NAN_2008
 config BR2_mips_xburst
 	bool "XBurst"
 	depends on !BR2_ARCH_IS_64
@@ -126,6 +134,33 @@ config BR2_MIPS_SOFT_FLOAT
 	  floating point functions, then everything will need to be
 	  compiled with soft floating point support (-msoft-float).
 
+config BR2_MIPS_NAN_LEGACY
+	bool
+
+config BR2_MIPS_NAN_2008
+	bool
+
+choice
+	prompt "Target NaN"
+	depends on BR2_mips_32r5 || BR2_mips_64r5
+	default BR2_MIPS_ENABLE_NAN_2008
+	help
+	  NaN encoding to be used
+
+config BR2_MIPS_ENABLE_NAN_LEGACY
+	bool "legacy"
+	select BR2_MIPS_NAN_LEGACY
+
+config BR2_MIPS_ENABLE_NAN_2008
+	bool "2008"
+	depends on !BR2_MIPS_SOFT_FLOAT
+	select BR2_MIPS_NAN_2008
+endchoice
+
+config BR2_GCC_TARGET_NAN
+	default "legacy"	if BR2_MIPS_NAN_LEGACY
+	default "2008"		if BR2_MIPS_NAN_2008
+
 config BR2_ARCH
 	default "mips"		if BR2_mips
 	default "mipsel"	if BR2_mipsel
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk
index ebda993bf4..7a62f4f7fc 100644
--- a/package/gcc/gcc.mk
+++ b/package/gcc/gcc.mk
@@ -210,6 +210,9 @@ endif
 ifneq ($(call qstrip,$(BR2_GCC_TARGET_ABI)),)
 HOST_GCC_COMMON_CONF_OPTS += --with-abi=$(BR2_GCC_TARGET_ABI)
 endif
+ifneq ($(call qstrip,$(BR2_GCC_TARGET_NAN)),)
+HOST_GCC_COMMON_CONF_OPTS += --with-nan=$(BR2_GCC_TARGET_NAN)
+endif
 ifneq ($(call qstrip,$(BR2_GCC_TARGET_CPU)),)
 ifneq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)
 HOST_GCC_COMMON_CONF_OPTS += --with-cpu=$(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_GCC_TARGET_CPU_REVISION))
@@ -260,6 +263,7 @@ HOST_GCC_COMMON_WRAPPER_TARGET_CPU := $(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_
 endif
 HOST_GCC_COMMON_WRAPPER_TARGET_ARCH := $(call qstrip,$(BR2_GCC_TARGET_ARCH))
 HOST_GCC_COMMON_WRAPPER_TARGET_ABI := $(call qstrip,$(BR2_GCC_TARGET_ABI))
+HOST_GCC_COMMON_WRAPPER_TARGET_NAN := $(call qstrip,$(BR2_GCC_TARGET_NAN))
 HOST_GCC_COMMON_WRAPPER_TARGET_FPU := $(call qstrip,$(BR2_GCC_TARGET_FPU))
 HOST_GCC_COMMON_WRAPPER_TARGET_FLOAT_ABI := $(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
 HOST_GCC_COMMON_WRAPPER_TARGET_MODE := $(call qstrip,$(BR2_GCC_TARGET_MODE))
@@ -273,6 +277,9 @@ endif
 ifneq ($(HOST_GCC_COMMON_WRAPPER_TARGET_ABI),)
 HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_ABI='"$(HOST_GCC_COMMON_WRAPPER_TARGET_ABI)"'
 endif
+ifneq ($(HOST_GCC_COMMON_WRAPPER_TARGET_NAN),)
+HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_NAN='"$(HOST_GCC_COMMON_WRAPPER_TARGET_NAN)"'
+endif
 ifneq ($(HOST_GCC_COMMON_WRAPPER_TARGET_FPU),)
 HOST_GCC_COMMON_TOOLCHAIN_WRAPPER_ARGS += -DBR_FPU='"$(HOST_GCC_COMMON_WRAPPER_TARGET_FPU)"'
 endif
diff --git a/package/uclibc/Config.in b/package/uclibc/Config.in
index b0b0b010f7..3b4f91da91 100644
--- a/package/uclibc/Config.in
+++ b/package/uclibc/Config.in
@@ -123,8 +123,8 @@ config BR2_UCLIBC_MIPS_ABI
 
 config BR2_UCLIBC_MIPS_NAN
 	string
-	default "LEGACY" if BR2_MIPS_CPU_MIPS32 || BR2_MIPS_CPU_MIPS64
-	default "2008" if BR2_MIPS_CPU_MIPS32R6 || BR2_MIPS_CPU_MIPS64R6
+	default "LEGACY" if BR2_MIPS_NAN_LEGACY
+	default "2008" if BR2_MIPS_NAN_2008
 	depends on BR2_UCLIBC_TARGET_ARCH = "mips"
 
 config BR2_UCLIBC_SH_TYPE
diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
index 1c5a5790f0..7dacbbc543 100644
--- a/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -154,6 +154,7 @@ CC_TARGET_CPU_ := $(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_GCC_TARGET_CPU_REVIS
 endif
 CC_TARGET_ARCH_ := $(call qstrip,$(BR2_GCC_TARGET_ARCH))
 CC_TARGET_ABI_ := $(call qstrip,$(BR2_GCC_TARGET_ABI))
+CC_TARGET_NAN_ := $(call qstrip,$(BR2_GCC_TARGET_NAN))
 CC_TARGET_FPU_ := $(call qstrip,$(BR2_GCC_TARGET_FPU))
 CC_TARGET_FLOAT_ABI_ := $(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
 CC_TARGET_MODE_ := $(call qstrip,$(BR2_GCC_TARGET_MODE))
@@ -176,6 +177,10 @@ ifneq ($(CC_TARGET_ABI_),)
 TOOLCHAIN_EXTERNAL_CFLAGS += -mabi=$(CC_TARGET_ABI_)
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ABI='"$(CC_TARGET_ABI_)"'
 endif
+ifneq ($(CC_TARGET_NAN_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mnan=$(CC_TARGET_NAN_)
+TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_NAN='"$(CC_TARGET_NAN_)"'
+endif
 ifneq ($(CC_TARGET_FPU_),)
 TOOLCHAIN_EXTERNAL_CFLAGS += -mfpu=$(CC_TARGET_FPU_)
 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_FPU='"$(CC_TARGET_FPU_)"'
diff --git a/toolchain/toolchain-wrapper.c b/toolchain/toolchain-wrapper.c
index c048992656..977d642487 100644
--- a/toolchain/toolchain-wrapper.c
+++ b/toolchain/toolchain-wrapper.c
@@ -51,6 +51,9 @@ static char *predef_args[] = {
 #ifdef BR_ABI
 	"-mabi=" BR_ABI,
 #endif
+#ifdef BR_NAN
+	"-mnan=" BR_NAN,
+#endif
 #ifdef BR_FPU
 	"-mfpu=" BR_FPU,
 #endif