+#if @GNULIB_FMODF@
+# if !@HAVE_FMODF@
+# undef fmodf
+_GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
+# endif
+_GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
+_GL_CXXALIASWARN (fmodf);
+#elif defined GNULIB_POSIXCHECK
+# undef fmodf
+# if HAVE_RAW_DECL_FMODF
+_GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
+ "use gnulib module fmodf for portability");
+# endif
+#endif
+
+
+/* Write x as
+ x = mantissa * 2^exp
+ where
+ If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
+ If x is zero: mantissa = x, exp = 0.
+ If x is infinite or NaN: mantissa = x, exp unspecified.
+ Store exp in *EXPPTR and return mantissa. */
+#if @GNULIB_FREXPF@
+# if @REPLACE_FREXPF@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef frexpf
+# define frexpf rpl_frexpf
+# endif
+_GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
+# else
+# if !@HAVE_FREXPF@
+# undef frexpf
+_GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
+# endif
+_GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
+# endif
+_GL_CXXALIASWARN (frexpf);
+#elif defined GNULIB_POSIXCHECK
+# undef frexpf
+# if HAVE_RAW_DECL_FREXPF
+_GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
+ "use gnulib module frexpf for portability");
+# endif
+#endif
+
+/* Write x as
+ x = mantissa * 2^exp
+ where
+ If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
+ If x is zero: mantissa = x, exp = 0.
+ If x is infinite or NaN: mantissa = x, exp unspecified.
+ Store exp in *EXPPTR and return mantissa. */
+#if @GNULIB_FREXP@
+# if @REPLACE_FREXP@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# define frexp rpl_frexp
+# endif
+_GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
+# else
+_GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
+# endif
+_GL_CXXALIASWARN (frexp);
+#elif defined GNULIB_POSIXCHECK
+# undef frexp
+/* Assume frexp is always declared. */
+_GL_WARN_ON_USE (frexp, "frexp is unportable - "
+ "use gnulib module frexp for portability");
+#endif
+