Avoid compilation errors with MSVC option -fp:strict. * lib/floor.c: Use MSVC specific pragma fenv_access. * lib/ceil.c: Likewise. * lib/trunc.c: Likewise. * lib/round.c: Likewise. * lib/rint.c: Likewise. * lib/fma.c: Likewise. * lib/integer_length.c: Likewise. * m4/round.m4 (gl_FUNC_ROUND): Likewise. * m4/roundf.m4 (gl_FUNC_ROUNDF): Likewise. * tests/test-floor2.c: Likewise. * tests/test-floorf2.c: Likewise. * tests/test-ceil2.c: Likewise. * tests/test-ceilf2.c: Likewise. * tests/test-trunc2.c: Likewise. * tests/test-truncf2.c: Likewise. Reported by Michael Goffioul <michael.goffioul@gmail.com>.

--- a/lib/trunc.c
+++ b/lib/trunc.c
@@ -54,6 +54,12 @@
 # define MINUS_ZERO L_(-0.0)
 #endif
 
+/* MSVC with option -fp:strict refuses to compile constant initializers that
+   contain floating-point operations.  Pacify this compiler.  */
+#ifdef _MSC_VER
+# pragma fenv_access (off)
+#endif
+
 /* 2^(MANT_DIG-1).  */
 static const DOUBLE TWO_MANT_DIG =
   /* Assume MANT_DIG <= 5 * 31.