Patch from Rich Felker
From here:
https://github.com/richfelker/musl-cross-make/blob/master/patches/binutils-2.25.1/0003-shemuls.diff

Required to build sh2 big endian toolchain.

diff -Nur binutils-2.25.1.orig/bfd/config.bfd binutils-2.25.1/bfd/config.bfd
--- binutils-2.25.1.orig/bfd/config.bfd	2014-10-14 09:32:02.000000000 +0200
+++ binutils-2.25.1/bfd/config.bfd	2015-12-06 15:17:26.703094863 +0100
@@ -1370,6 +1370,7 @@
   sh-*-linux*)
     targ_defvec=sh_elf32_linux_be_vec
     targ_selvecs="sh_elf32_linux_vec sh64_elf32_linux_vec sh64_elf32_linux_be_vec sh64_elf64_linux_vec sh64_elf64_linux_be_vec"
+    targ_selvecs="${targ_selvecs} sh_elf32_vec sh_elf32_le_vec sh_elf32_fdpic_le_vec sh_elf32_fdpic_be_vec"
     want64=true
     ;;
 #endif /* BFD64 */
@@ -1377,10 +1378,12 @@
   sh*eb-*-linux*)
     targ_defvec=sh_elf32_linux_be_vec
     targ_selvecs=sh_elf32_linux_vec
+    targ_selvecs="${targ_selvecs} sh_elf32_vec sh_elf32_le_vec sh_elf32_fdpic_le_vec sh_elf32_fdpic_be_vec"
     ;;
   sh*-*-linux*)
     targ_defvec=sh_elf32_linux_vec
     targ_selvecs=sh_elf32_linux_be_vec
+    targ_selvecs="${targ_selvecs} sh_elf32_vec sh_elf32_le_vec sh_elf32_fdpic_le_vec sh_elf32_fdpic_be_vec"
     ;;
 
   sh-*-uclinux* | sh[12]-*-uclinux*)
diff -Nur binutils-2.25.1.orig/ld/configure.tgt binutils-2.25.1/ld/configure.tgt
--- binutils-2.25.1.orig/ld/configure.tgt	2014-10-14 09:32:04.000000000 +0200
+++ binutils-2.25.1/ld/configure.tgt	2015-12-06 15:17:26.723094193 +0100
@@ -623,15 +623,17 @@
 score-*-elf)            targ_emul=score7_elf
 			targ_extra_emuls=score3_elf ;;
 sh-*-linux*)		targ_emul=shlelf_linux
-			targ_extra_emuls=shelf_linux
+			targ_extra_emuls="shelf_linux shlelf_fd shelf_fd shlelf shelf"
 			targ_extra_libpath=shelf_linux ;;
 sh64eb-*-linux*)	targ_emul=shelf32_linux
 			targ_extra_emuls="shlelf32_linux" ;;
 sh64-*-linux*)		targ_emul=shlelf32_linux
 			targ_extra_emuls="shelf32_linux"
 			targ_extra_libpath=shelf32_linux ;;
-sh*eb-*-linux*)		targ_emul=shelf_linux ;;
-sh*-*-linux*)		targ_emul=shlelf_linux ;;
+sh*eb-*-linux*)		targ_emul=shelf_linux
+			targ_extra_emuls="shelf_fd shelf" ;;
+sh*-*-linux*)		targ_emul=shlelf_linux
+			targ_extra_emuls="shlelf_fd shlelf" ;;
 sh5le-*-netbsd*)	targ_emul=shlelf32_nbsd
 			targ_extra_emuls="shelf32_nbsd shelf64_nbsd shlelf64_nbsd shelf_nbsd shlelf_nbsd" ;;
 sh5-*-netbsd*)		targ_emul=shelf32_nbsd