Add VxWorks fixincludes hack, C99 FP classification

Arrange to provide missing defs for C99 FP classification functions
and constants queried by libstdc++ configure checks (C99 support for C++98)

2021-01-10  Olivier Hainque  <hainque@adacore.com>

	* inclhack.def (vxworks_math_h_fp_c99): New hack.
	* tests/base/math.h: Update.
	* fixincl.x: Regenerate.

1 files changed, 50 insertions, 0 deletions

diff --git a/fixincludes/inclhack.def b/fixincludes/inclhack.def
index 4643678..2756478 100644
--- a/fixincludes/inclhack.def
+++ b/fixincludes/inclhack.def
@@ -5157,6 +5157,56 @@ fix = {
         
     test_text   = "extern int ioctl ( int asdf1234, int jkl , int qwerty ) ;";
 };
+ 
+/*
+ * Provide C99 FP classification support in VxWorks math.h if
+ * not already there. Note the strict expectation on #define without
+ * whitespaces in the bypass expression, which "works" for
+ * the system headers we have met and doesn't match test texts for
+ * other hacks, found in the test baseline.
+ */
+fix = {
+    hackname  = vxworks_math_h_fp_c99;
+    mach      = "*-*-vxworks*";
+    files     = math.h;
+    bypass    = "#define[ \t]+FP_INFINITE";
+    select    = "#define HUGE_VAL[ \t]*_ARCH.*";
+    c_fix     = format;
+    c_fix_arg = << _EOArg_
+
+%0
+
+#if _C99
+
+#define FP_INFINITE  1
+#define FP_NAN       2
+#define FP_NORMAL    (-1)
+#define FP_SUBNORMAL (-2)
+#define FP_ZERO      0
+
+#define fpclassify(x) \
+  __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, \
+		       FP_SUBNORMAL, FP_ZERO, (x))
+
+#define signbit(x) __builtin_signbit(x)
+#define isfinite(x) __builtin_isfinite(x)
+#define isnormal(x) __builtin_isnormal(x)
+#define isnan(x) __builtin_isnan(x)
+#define isinf(x) __builtin_isinf(x)
+
+#define isgreater(x, y) __builtin_isgreater((x),(y))
+#define isgreaterequal(x, y) __builtin_isgreaterequal((x),(y))
+#define isless(x, y) __builtin_isless((x),(y))
+#define islessequal(x, y) __builtin_islessequal((x),(y))
+#define islessgreater(x, y) __builtin_islessgreater((x),(y))
+#define isunordered(x, y) __builtin_isunordered((x),(y))
+
+#endif /* _C99 */
+
+_EOArg_;
+
+    test_text  = "#define HUGE_VAL _ARCH_HUGH_VAL";
+};
 
 /*
  *  mkdir's posix interface expects two arguments.  While the RTP VxWorks