2 files changed, 22 insertions, 5 deletions

diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 1f409bf81809..3b2d8e232240 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -38,6 +38,22 @@ cflags-$(CONFIG_CPU_SH4A)		+= $(call cc-option,-m4a,) \
                                            $(call cc-option,-m4a-nofpu,)
 cflags-$(CONFIG_CPU_SH5)                := $(call cc-option,-m5-32media-nofpu,)
 
+ifeq ($(cflags-y),)
+#
+# In the case where we are stuck with a compiler that has been uselessly
+# restricted to a particular ISA, a favourite default of newer GCCs when
+# extensive multilib targets are not provided, ensure we get the best fit
+# regarding FP generation. This is necessary to avoid references to FP
+# variants in libgcc where integer variants exist, which otherwise result
+# in link errors. This is intentionally stupid (albeit many orders of
+# magnitude less than GCC's default behaviour), as anything with a large
+# number of multilib targets better have been built correctly for
+# the target in mind.
+#
+cflags-y        += $(shell $(CC) $(KBUILD_CFLAGS) -print-multi-lib | \
+                     grep nofpu | sed q | sed -e 's/^/-/;s/;.*$$//')
+endif
+
 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -mb
 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -ml
 
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index d366a7443720..d998f4c795be 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -50,7 +50,10 @@ EXPORT_SYMBOL(__udelay);
 EXPORT_SYMBOL(__ndelay);
 EXPORT_SYMBOL(__const_udelay);
 
-#define DECLARE_EXPORT(name) extern void name(void);EXPORT_SYMBOL(name)
+#define DECLARE_EXPORT(name)            \
+        extern void name(void);EXPORT_SYMBOL(name)
+#define MAYBE_DECLARE_EXPORT(name)      \
+        extern void name(void) __weak;EXPORT_SYMBOL(name)
 
 /* These symbols are generated by the compiler itself */
 DECLARE_EXPORT(__udivsi3);
@@ -109,10 +112,8 @@ DECLARE_EXPORT(__movmemSI12_i4);
  * compiler which include backported patches.
  */
 DECLARE_EXPORT(__udiv_qrnnd_16);
-#if !defined(CONFIG_CPU_SH2)
-DECLARE_EXPORT(__sdivsi3_i4i);
-DECLARE_EXPORT(__udivsi3_i4i);
-#endif
+MAYBE_DECLARE_EXPORT(__sdivsi3_i4i);
+MAYBE_DECLARE_EXPORT(__udivsi3_i4i);
 #endif
 #else /* GCC 3.x */
 DECLARE_EXPORT(__movstr_i4_even);