Fixes #185 (#187)

Missing `string_view` header and invalid `_Static_assert` statement

src/cpuinfo_x86.c

@@ -102,7 +102,6 @@
     defined(CPU_FEATURES_OS_FREEBSD)
 #include "internal/filesystem.h"         // Needed to parse /proc/cpuinfo
 #include "internal/stack_line_reader.h"  // Needed to parse /proc/cpuinfo
-#include "internal/string_view.h"        // Needed to parse /proc/cpuinfo
 #elif defined(CPU_FEATURES_OS_DARWIN)
 #if !defined(HAVE_SYSCTLBYNAME)
 #error "Darwin needs support for sysctlbyname"
@@ -112,6 +111,8 @@
 #error "Unsupported OS"
 #endif  // CPU_FEATURES_OS
 
+#include "internal/string_view.h"
+
 ////////////////////////////////////////////////////////////////////////////////
 // Definitions for CpuId and GetXCR0Eax.
 ////////////////////////////////////////////////////////////////////////////////
@@ -1698,11 +1699,10 @@ void FillX86BrandString(char brand_string[49]) {
       SafeCpuId(max_cpuid_leaf_ext, 0x80000003),
       SafeCpuId(max_cpuid_leaf_ext, 0x80000004),
   };
-  const size_t leaves_size = sizeof(leaves);
 #if __STDC_VERSION__ >= 201112L
-  _Static_assert(leaves_size == 48, "Leaves must be packed");
+  _Static_assert(sizeof(leaves) == 48, "Leaves must be packed");
 #endif
-  CpuFeatures_StringView_CopyString(view((const char*)leaves, leaves_size),
+  CpuFeatures_StringView_CopyString(view((const char*)leaves, sizeof(leaves)),
                                     brand_string, 49);
 }