fix gcc cross compilation

package/gcc/Makefile

@@ -21,9 +21,13 @@ include ${TOPDIR}/mk/package.mk
 $(eval $(call PKG_template,GCC,gcc,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION}))
 $(eval $(call PKG_template,GXX,g++,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION}))
 
-TARGET_CPPFLAGS:=	''
-TARGET_CFLAGS:=		''
-TARGET_CXXFLAGS:=	''
+CPPFLAGS_FOR_BUILD:=	-I$(STAGING_HOST_DIR)/include
+CFLAGS_FOR_BUILD:=
+LDFLAGS_FOR_BUILD:=
+TARGET_CPPFLAGS:=
+TARGET_CFLAGS:=
+TARGET_LDFLAGS:=
+TARGET_CXXFLAGS:=
 
 ifeq ($(ADK_TARGET_SYSTEM_LEMOTE_YEELONG),y)
 CONFIGURE_ARGS+=       --with-abi=$(ADK_TARGET_MIPS_ABI)

package/gcc/patches/4.8.2/gcc-cppflags.patch

@@ -0,0 +1,24 @@
+diff -Nur gcc-4.8.2.orig/gcc/configure gcc-4.8.2/gcc/configure
+--- gcc-4.8.2.orig/gcc/configure	2013-06-19 03:18:38.000000000 +0200
++++ gcc-4.8.2/gcc/configure	2014-03-03 15:05:00.647062804 +0100
+@@ -11204,7 +11204,7 @@
+ 	esac
+ 	saved_CFLAGS="${CFLAGS}"
+ 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
+-	LDFLAGS="${LDFLAGS_FOR_BUILD}" \
++	LDFLAGS="${LDFLAGS_FOR_BUILD}" CPPFLAGS="${CPPFLAGS_FOR_BUILD}" \
+ 	${realsrcdir}/configure \
+ 		--enable-languages=${enable_languages-all} \
+ 		--target=$target_alias --host=$build_alias --build=$build_alias
+diff -Nur gcc-4.8.2.orig/gcc/Makefile.in gcc-4.8.2/gcc/Makefile.in
+--- gcc-4.8.2.orig/gcc/Makefile.in	2013-07-08 11:14:34.000000000 +0200
++++ gcc-4.8.2/gcc/Makefile.in	2014-03-03 15:13:22.021327933 +0100
+@@ -996,7 +996,7 @@
+ # Likewise.  Put INCLUDES at the beginning: this way, if some autoconf macro
+ # puts -I options in CPPFLAGS, our include files in the srcdir will always
+ # win against random include files in /usr/include.
+-ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS)
++ALL_CPPFLAGS = $(INCLUDES)
+ 
+ # This is the variable to use when using $(COMPILER).
+ ALL_COMPILERFLAGS = $(ALL_CXXFLAGS)

package/gcc/patches/4.8.2/musl-sh.patch

@@ -0,0 +1,11 @@
+diff -Nur gcc-4.8.2.orig/gcc/config/sh/linux.h gcc-4.8.2/gcc/config/sh/linux.h
+--- gcc-4.8.2.orig/gcc/config/sh/linux.h	2013-03-14 04:01:53.000000000 +0100
++++ gcc-4.8.2/gcc/config/sh/linux.h	2014-03-01 11:33:10.000000000 +0100
+@@ -44,6 +44,7 @@
+ #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-sh.so.1"
+ 
+ #undef SUBTARGET_LINK_EMUL_SUFFIX
+ #define SUBTARGET_LINK_EMUL_SUFFIX "_linux"

package/gcc/patches/4.8.2/musl-stubs.patch

@@ -0,0 +1,49 @@
+diff -Nur gcc-4.8.2.orig/gcc/config/m68k/linux.h gcc-4.8.2/gcc/config/m68k/linux.h
+--- gcc-4.8.2.orig/gcc/config/m68k/linux.h	2013-01-10 21:38:27.000000000 +0100
++++ gcc-4.8.2/gcc/config/m68k/linux.h	2014-02-24 10:19:00.214399704 +0100
+@@ -72,6 +72,7 @@
+    done.  */
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
+ 
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+diff -Nur gcc-4.8.2.orig/gcc/config/mips/linux64.h gcc-4.8.2/gcc/config/mips/linux64.h
+--- gcc-4.8.2.orig/gcc/config/mips/linux64.h	2013-01-10 21:38:27.000000000 +0100
++++ gcc-4.8.2/gcc/config/mips/linux64.h	2014-02-24 10:19:47.238583895 +0100
+@@ -27,6 +27,9 @@
+ #define GLIBC_DYNAMIC_LINKERN32 "/lib32/ld.so.1"
+ #define UCLIBC_DYNAMIC_LINKERN32 "/lib32/ld-uClibc.so.0"
+ #define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32"
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-mips.so.1"
++#define MUSL_DYNAMIC_LINKERN32 "/lib/ld-musl-mips.so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-mips.so.1"
+ #define GNU_USER_DYNAMIC_LINKERN32 \
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
+-			 BIONIC_DYNAMIC_LINKERN32)
++			 BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKERN32)
+diff -Nur gcc-4.8.2.orig/gcc/config/sparc/linux64.h gcc-4.8.2/gcc/config/sparc/linux64.h
+--- gcc-4.8.2.orig/gcc/config/sparc/linux64.h	2013-01-10 21:38:27.000000000 +0100
++++ gcc-4.8.2/gcc/config/sparc/linux64.h	2014-02-24 10:20:49.414827006 +0100
+@@ -94,6 +94,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
+ #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-sparc.so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-sparc.so.1"
++
+ 
+ #ifdef SPARC_BI_ARCH
+ 
+diff -Nur gcc-4.8.2.orig/gcc/config/sparc/linux.h gcc-4.8.2/gcc/config/sparc/linux.h
+--- gcc-4.8.2.orig/gcc/config/sparc/linux.h	2013-01-10 21:38:27.000000000 +0100
++++ gcc-4.8.2/gcc/config/sparc/linux.h	2014-02-24 10:21:14.342924339 +0100
+@@ -84,6 +84,7 @@
+    done.  */
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-sparc.so.1"
+ 
+ #undef  LINK_SPEC
+ #define LINK_SPEC "-m elf32_sparc %{shared:-shared} \