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-rw-r--r--math/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/math/Makefile b/math/Makefile
index 839e441354..87b47ab1b6 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -67,7 +67,8 @@ distribute += $(long-m-yes:=.c)
 # These functions are in libc instead of libm because __printf_fp
 # calls them, so any program using printf will need them linked in,
 # and we don't want to have to link every program with -lm.
-calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn s_frexp s_ldexp
+calls = s_isinf s_isnan s_finite s_copysign s_modf s_scalbn s_frexp s_ldexp \
+	s_signbit
 routines = $(calls) $(calls:=f) $(long-c-$(long-double-fcts))
 long-c-yes = $(calls:=l)
 distribute += $(long-c-yes:=.c)