Index: gsl-1.8/sys/Makefile.in
===================================================================
--- gsl-1.8.orig/sys/Makefile.in
+++ gsl-1.8/sys/Makefile.in
@@ -62,12 +62,12 @@ test_DEPENDENCIES = libgslsys.la ../ieee
 DEFAULT_INCLUDES = -I. -I$(srcdir) -I$(top_builddir)
 depcomp =
 am__depfiles_maybe =
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
-	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) $(CFLAGS_$@)
 LTCOMPILE = $(LIBTOOL) --tag=CC --mode=compile $(CC) $(DEFS) \
 	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
-	$(AM_CFLAGS) $(CFLAGS)
+	$(AM_CFLAGS) $(CFLAGS) $(CFLAGS_$@)
 CCLD = $(CC)
 LINK = $(LIBTOOL) --tag=CC --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(AM_LDFLAGS) $(LDFLAGS) -o $@
 SOURCES = $(libgslsys_la_SOURCES) $(test_SOURCES)
@@ -92,8 +92,9 @@ AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
 AWK = @AWK@
 CC = @CC@
 CFLAGS = @CFLAGS@
+CFLAGS_log1p.lo = -fno-fast-math
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@