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-rw-r--r--configure.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.in b/configure.in
index 98633bb526..9717f4731f 100644
--- a/configure.in
+++ b/configure.in
@@ -1117,7 +1117,7 @@ AS_CASE([$rb_cv_broken_glibc_ia64_erfc],[yes],[ac_cv_func_erf=no])
AC_REPLACE_FUNCS(dup2 memmove strerror\
strchr strstr crypt flock\
isnan finite isinf hypot acosh erf tgamma lgamma_r cbrt \
- strlcpy strlcat)
+ strlcpy strlcat ffs)
AC_CACHE_CHECK(for signbit, rb_cv_have_signbit,
[AC_TRY_LINK([
#include <math.h>