Fix generated cflags in LLVM/Clang for Star-MC3

Author: JonatanAntoni

tools/buildmgr/cbuildgen/config/CLANG.17.0.1.cmake

@@ -197,7 +197,7 @@ elseif(CPU STREQUAL "Cortex-M52")
   endif()
 elseif(CPU STREQUAL "Star-MC3")
   set(CLANG_ARCH "armv8.1m.main")
-  set(CPU_FEATURES "Star-MC3")
+  set(CPU_FEATURES "star-mc3")
   if(MVE STREQUAL "NO_MVE")
     if(FPU STREQUAL "NO_FPU")
       set(CPU_FEATURES "${CPU_FEATURES}+nomve+nofp")
@@ -212,25 +212,24 @@ elseif(CPU STREQUAL "Star-MC3")
     elseif(FPU STREQUAL "SP_FPU")
       set(CPU_FEATURES "${CPU_FEATURES}+nomve.fp+nofp.dp")
     elseif(FPU STREQUAL "DP_FPU")
-      message(FATAL_ERROR "Error: Star-MC3+nomve.fp is not supported!")
+      message(FATAL_ERROR "Error: star-mc3+nomve.fp is not supported!")
     endif()
   elseif(MVE STREQUAL "FP_MVE")
     if(FPU STREQUAL "NO_FPU")
-      message(FATAL_ERROR "Error: Star-MC3+nofp is not supported!")
+      message(FATAL_ERROR "Error: star-mc3+nofp is not supported!")
     elseif(FPU STREQUAL "SP_FPU")
-      message(FATAL_ERROR "Error: Star-MC3+nofp.dp is not supported!")
-    elseif(FPU STREQUAL "DP_FPU")
-      set(CPU_FEATURES "${CPU_FEATURES}")
+      message(FATAL_ERROR "Error: star-mc3+nofp.dp is not supported!")
     endif()
   endif()
   if(PACBTI STREQUAL "NO_PACBTI")
     set(CPU_FEATURES "${CPU_FEATURES}+nopacbti")
   endif()
   if(FPU STREQUAL "NO_FPU")
-    set(CLANG_MCPU "-mcpu=${CPU_FEATURES}")
+    set(CLANG_MFLOATABI "soft")
   else()
-    set(CLANG_MCPU "-mcpu=${CPU_FEATURES} -mfloat-abi=hard")
+    set(CLANG_MFLOATABI "hard")
   endif()  
+  set(CLANG_MCPU "${CPU_FEATURES}")
 elseif(CPU STREQUAL "Cortex-M55")
   set(CLANG_ARCH "armv8.1m.main")
   if(FPU STREQUAL "NO_FPU")