t-linux: Add -mfp-rounding-mode=d to HOST_LIBGCC2_CFLAGS.

	* config/alpha/t-linux: Add -mfp-rounding-mode=d
	to HOST_LIBGCC2_CFLAGS.

From-SVN: r268430

libgcc/ChangeLog

+2019-01-31  Uroš Bizjak  <ubizjak@gmail.com>
+
+	* config/alpha/t-linux: Add -mfp-rounding-mode=d
+	to HOST_LIBGCC2_CFLAGS.
+
 2019-01-23  Joseph Myers  <joseph@codesourcery.com>
 
 	PR libgcc/88931
-	* libgcc2.c (FSTYPE FUNC (DWtype u)): Correct no leading bits
-	case.
+	* libgcc2.c (FSTYPE FUNC (DWtype u)): Correct no leading bits case.
 
 2019-01-18  Martin Liska  <mliska@suse.cz>
 

libgcc/config/alpha/t-linux

 SHLIB_MAPFILES += $(srcdir)/config/alpha/libgcc-alpha-ldbl.ver
+
+# Use dynamic rounding mode.
+HOST_LIBGCC2_CFLAGS += -mfp-rounding-mode=d