Support building floating-point facilities on FreeBSD 9.2 in 32-bit mode

[scanon]

LGTM. I'm no expert on the BSD environment, but this seems perfectly reasonable.

[theraven]

Looks okay to me.

[emaste]

lib/builtins/fp_lib.h

33 ↗

(On Diff #9800)

Minor point, we may want to use < 903000 for these tests instead (corresponding to the 9.3 release). It's a minor point, but I think more accurately reflects the intent of the test.

For example, a hypothetical 9.2.1 point release would still lack -m32 support in headers, but would have a __FreeBSD_version higher then 902001.

[kutuzov.viktor.84]

Closed by commit rL212518 (authored by vkutuzov).

[kutuzov.viktor.84]

Committed with the OS version number testing rewritten as suggested by Ed Maste. Thanks, Ed.

compiler-rt/trunk/lib/builtins/fp_lib.h

 #ifndef FP_LIB_HEADER
 #define FP_LIB_HEADER
 
 #include <stdint.h>
 #include <stdbool.h>
 #include <limits.h>
 #include "int_lib.h"
 
+// x86_64 FreeBSD prior v9.3 define fixed-width types incorrectly in
+// 32-bit mode.
+#if defined(__FreeBSD__) && defined(__i386__)
+# include <sys/param.h>
+# if __FreeBSD_version < 903000  // v9.3
+#  define uint64_t unsigned long long
+#  define int64_t long long
+#  undef UINT64_C
+#  define UINT64_C(c) (c ## ULL)
+# endif
+#endif
+
 #if defined SINGLE_PRECISION
 
 typedef uint32_t rep_t;
 typedef int32_t srep_t;
 typedef float fp_t;
 #define REP_C UINT32_C
 #define significandBits 23