Build: Fix float test errors with Xcode 14.2/Arm

Unlike other versions of Clang 14.0.0, AppleClang 14.0.0 in Xcode 14.2
retains the old -ffp-contract=off default.  Apple didn't adopt
-ffp-contract=on as the default until Xcode 14.3 (AppleClang 14.0.3.)
This has been confirmed in the Xcode 14.3 release notes.

CMakeLists.txt

@@ -935,8 +935,14 @@ if(CPU_TYPE STREQUAL "x86_64" OR CPU_TYPE STREQUAL "i386")
   endif()
 elseif(CPU_TYPE STREQUAL "powerpc" OR CPU_TYPE STREQUAL "arm64")
   if(CMAKE_C_COMPILER_ID MATCHES "Clang")
-    if(CMAKE_C_COMPILER_VERSION VERSION_EQUAL 14.0.0 OR
-      CMAKE_C_COMPILER_VERSION VERSION_GREATER 14.0.0)
+    if(CMAKE_C_COMPILER_ID MATCHES "AppleClang")
+      # Xcode 14.3 and later
+      set(MIN_FP_CONTRACT_VERSION 14.0.1)
+    else()
+      set(MIN_FP_CONTRACT_VERSION 14.0.0)
+    endif()
+    if(CMAKE_C_COMPILER_VERSION VERSION_EQUAL ${MIN_FP_CONTRACT_VERSION} OR
+      CMAKE_C_COMPILER_VERSION VERSION_GREATER ${MIN_FP_CONTRACT_VERSION})
       set(DEFAULT_FLOATTEST8 fp-contract)
     else()
       set(DEFAULT_FLOATTEST8 no-fp-contract)
@@ -977,8 +983,14 @@ if(CPU_TYPE STREQUAL "x86_64")
   set(DEFAULT_FLOATTEST12 no-fp-contract)
 elseif(CPU_TYPE STREQUAL "powerpc" OR CPU_TYPE STREQUAL "arm64")
   if(CMAKE_C_COMPILER_ID MATCHES "Clang")
-    if(CMAKE_C_COMPILER_VERSION VERSION_EQUAL 14.0.0 OR
-      CMAKE_C_COMPILER_VERSION VERSION_GREATER 14.0.0)
+    if(CMAKE_C_COMPILER_ID MATCHES "AppleClang")
+      # Xcode 14.3 and later
+      set(MIN_FP_CONTRACT_VERSION 14.0.1)
+    else()
+      set(MIN_FP_CONTRACT_VERSION 14.0.0)
+    endif()
+    if(CMAKE_C_COMPILER_VERSION VERSION_EQUAL ${MIN_FP_CONTRACT_VERSION} OR
+      CMAKE_C_COMPILER_VERSION VERSION_GREATER ${MIN_FP_CONTRACT_VERSION})
       set(DEFAULT_FLOATTEST12 fp-contract)
     else()
       set(DEFAULT_FLOATTEST12 no-fp-contract)