re PR target/50980 (arm-rtems multilib not matching for -mfpu=vfp -mfloat-abi=soft)

2011-11-04	Thomas Doerfler <thomas.doerfler@embedded-brains.de>

	PR target/50980
	* config/arm/rtems-elf.h, config/arm/t-rtems: Add optional
	support for VFP floating point model.

From-SVN: r180959

gcc/ChangeLog

+2011-11-04	Thomas Doerfler <thomas.doerfler@embedded-brains.de>
+
+	PR target/50989
+	* config/arm/rtems-elf.h, config/arm/t-rtems: Add optional
+	support for VFP floating point model.
+
 2011-11-04  Tristan Gingold  <gingold@adacore.com>
 
 	* config/alpha/vms.h (ASM_OUTPUT_DEF): Do not switch section.

gcc/config/arm/rtems-elf.h

@@ -35,7 +35,7 @@
  */
 #undef SUBTARGET_EXTRA_ASM_SPEC
 #define SUBTARGET_EXTRA_ASM_SPEC "\
-  %{!mfloat-abi=hard: %{!mfloat-abi=soft:-mfpu=softfpa}}"
+  %{!mfloat-abi=hard: %{!mfpu=vfp: %{!mfloat-abi=soft:-mfpu=softfpa}}}"
 
 /*
  *  The default includes --start-group and --end-group which conflicts

gcc/config/arm/t-rtems

@@ -5,6 +5,41 @@ MULTILIB_DIRNAMES    = arm thumb
 MULTILIB_EXCEPTIONS  = 
 MULTILIB_MATCHES     = marm=mno-thumb
 
-MULTILIB_OPTIONS    += mfloat-abi=soft/mfloat-abi=hard
-MULTILIB_DIRNAMES   += soft fpu
-MULTILIB_EXCEPTIONS += *mthumb/*mfloat-abi=hard*
+MULTILIB_OPTIONS    += mfloat-abi=hard/mfloat-abi=softfp
+MULTILIB_DIRNAMES   += fpu softfp
+MULTILIB_EXCEPTIONS += *mthumb*/*mfloat-abi=hard* *mthumb*/*mfloat-abi=softfp*
+MULTILIB_MATCHES     =
+
+MULTILIB_OPTIONS    += mfpu=vfp
+MULTILIB_DIRNAMES   += vfp
+MULTILIB_EXCEPTIONS += *mfloat-abi=hard*/*mfpu=vfp* *marm*/*mfloat-abi=softfp*/*mfpu=fpa*
+MULTILIB_EXCLUSIONS += !mthumb/mfloat-abi=softfp/!mfpu=vfp
+
+# default float model is fpa, so don't create a explicit copy of it
+MULTILIB_EXCEPTIONS += *marm*/*mfpa*
+
+# permutations of the options which are useful (+) or make no sense (-),
+# defaults are in brackets:
+# + (arm/soft/fpa)
+# + (arm/soft)/vfp
+# - (arm)/softfp(/fpa)
+# + (arm)/softfp/vfp
+# + (arm)/float-abi=hard(/fpa)
+# - (arm)/float-abi=hard/vfp
+# + thumb/(soft/fpa)
+# + thumb/(soft/)vfp
+# - thumb/softfp/fpa
+# - thumb/softfp/vfp
+# - thumb/float-abi=hard/fpa
+# - thumb/float-abi=hard/vfp
+
+# subdirs to be used for multilibs and their respective options:
+#/thumb/vfp  -> thumb/soft/vfp
+#/thumb/fpa  -> thumb/soft/fpa
+#/thumb      -> thumb/soft/fpa
+#/vfp        -> arm/soft/vfp
+#/softfp/vfp -> arm/softfp/cfp
+#/fpu/fpa    -> arm/hard/fpa
+#/fpu        -> arm/hard/fpa
+#/fpa        -> arm/soft/fpa
+#.           -> arm/soft/fpa