ignore unknown pragmas

Author: Nat!

CMakeLists.txt

@@ -2,6 +2,21 @@ cmake_minimum_required( VERSION 3.13...99.99)
 
 project( mulle-objc-runtime VERSION 0.26.0 LANGUAGES C)
 
+# Add suppression flags based on compiler
+if(CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "GNU")
+  # GCC and Clang suppression flags
+  add_compile_options(
+    -Wno-unknown-pragmas
+  )
+elseif(CMAKE_C_COMPILER_ID MATCHES "MSVC")
+  # MSVC suppression flags
+  add_compile_options(
+    /wd4068  # Unknown pragma warning
+  )
+  # MSVC secure function warnings suppression
+  add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
+endif()
+
 ### mulle-sde environment
 
 # add cmake module paths to search path

src/mulle-objc-taggedpointer.h

@@ -192,7 +192,7 @@ static inline void   *mulle_objc_create_double_taggedpointer( double d, unsigned
 
    c.value = d;
    c.bits  = (c.bits << 5) | (c.bits >> (64 - 5));
-   return( (void *) (uintptr_t) (c.bits & ~ (uint64_t) 0x7 | index));
+   return( (void *) (uintptr_t) ((c.bits & ~ (uint64_t) 0x7) | index));
 }
 
 
@@ -328,7 +328,7 @@ static inline void   *mulle_objc_create_float_taggedpointer( float f, unsigned i
    if( sizeof( uintptr_t) == sizeof( uint32_t))
    {
       c.bits  = (c.bits << 4) | (c.bits >> (32 - 4));
-      return( (void *) (uintptr_t) (c.bits & ~0x3 | index));
+      return( (void *) (uintptr_t) ((c.bits & ~0x3) | index));
    }
 
    return( (void *) (uintptr_t) (((uint64_t) c.bits << 3) | index));