Revert "Don't use __weak_reference() when a __strong_reference() is needed."

Unlike the __weak_reference() macro, __strong_reference() does type
checking. It can only create the reference if the type of the source and
the destination function match exactly.

Even if double == long double in practice, they remain unequal at the
language level.

src/e_acos.c

@@ -107,5 +107,5 @@ __ieee754_acos(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(acos, acosl);
+__weak_reference(acos, acosl);
 #endif

src/e_asin.c

@@ -113,5 +113,5 @@ __ieee754_asin(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(asin, asinl);
+__weak_reference(asin, asinl);
 #endif

src/e_atan2.c

@@ -125,5 +125,5 @@ __ieee754_atan2(double y, double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(atan2, atan2l);
+__weak_reference(atan2, atan2l);
 #endif

src/e_hypot.c

@@ -127,5 +127,5 @@ __ieee754_hypot(double x, double y)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(hypot, hypotl);
+__weak_reference(hypot, hypotl);
 #endif

src/e_remainder.c

@@ -75,5 +75,5 @@ __ieee754_remainder(double x, double p)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(remainder, remainderl);
+__weak_reference(remainder, remainderl);
 #endif

src/e_sqrt.c

@@ -189,7 +189,7 @@ __ieee754_sqrt(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(sqrt, sqrtl);
+__weak_reference(sqrt, sqrtl);
 #endif
 
 /*

src/s_atan.c

@@ -120,5 +120,5 @@ atan(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(atan, atanl);
+__weak_reference(atan, atanl);
 #endif

src/s_cbrt.c

@@ -114,5 +114,5 @@ cbrt(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(cbrt, cbrtl);
+__weak_reference(cbrt, cbrtl);
 #endif

src/s_ceil.c

@@ -73,5 +73,5 @@ ceil(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(ceil, ceill);
+__weak_reference(ceil, ceill);
 #endif

src/s_cos.c

@@ -85,5 +85,5 @@ cos(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(cos, cosl);
+__weak_reference(cos, cosl);
 #endif

src/s_cproj.c

@@ -43,5 +43,5 @@ cproj(double complex z)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(cproj, cprojl);
+__weak_reference(cproj, cprojl);
 #endif

src/s_csqrt.c

@@ -110,5 +110,5 @@ csqrt(double complex z)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(csqrt, csqrtl);
+__weak_reference(csqrt, csqrtl);
 #endif

src/s_exp2.c

@@ -392,5 +392,5 @@ exp2(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(exp2, exp2l);
+__weak_reference(exp2, exp2l);
 #endif

src/s_floor.c

@@ -74,5 +74,5 @@ floor(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(floor, floorl);
+__weak_reference(floor, floorl);
 #endif

src/s_fma.c

@@ -280,5 +280,5 @@ fma(double x, double y, double z)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(fma, fmal);
+__weak_reference(fma, fmal);
 #endif

src/s_frexp.c

@@ -52,5 +52,5 @@ frexp(double x, int *eptr)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(frexp, frexpl);
+__weak_reference(frexp, frexpl);
 #endif

src/s_isinf.c

@@ -62,4 +62,4 @@ __isinfl(long double e)
 }
 #endif
 
-__strong_reference(__isinff, isinff);
+__weak_reference(__isinff, isinff);

src/s_isnan.c

@@ -63,4 +63,4 @@ __isnanl(long double e)
 }
 #endif
 
-__strong_reference(__isnanf, isnanf);
+__weak_reference(__isnanf, isnanf);

src/s_logb.c

@@ -45,5 +45,5 @@ logb(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(logb, logbl);
+__weak_reference(logb, logbl);
 #endif

src/s_nan.c

@@ -120,5 +120,5 @@ nanf(const char *s)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(nan, nanl);
+__weak_reference(nan, nanl);
 #endif

src/s_nextafter.c

@@ -77,7 +77,7 @@ nextafter(double x, double y)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(nextafter, nexttoward);
-__strong_reference(nextafter, nexttowardl);
-__strong_reference(nextafter, nextafterl);
+__weak_reference(nextafter, nexttoward);
+__weak_reference(nextafter, nexttowardl);
+__weak_reference(nextafter, nextafterl);
 #endif

src/s_remquo.c

@@ -154,5 +154,5 @@ fixup:
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(remquo, remquol);
+__weak_reference(remquo, remquol);
 #endif

src/s_rint.c

@@ -88,5 +88,5 @@ rint(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(rint, rintl);
+__weak_reference(rint, rintl);
 #endif

src/s_scalbn.c

@@ -59,8 +59,8 @@ scalbn (double x, int n)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(scalbn, ldexpl);
-__strong_reference(scalbn, scalbnl);
+__weak_reference(scalbn, ldexpl);
+__weak_reference(scalbn, scalbnl);
 #endif
 
 __strong_reference(scalbn, ldexp);

src/s_sin.c

@@ -85,5 +85,5 @@ sin(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(sin, sinl);
+__weak_reference(sin, sinl);
 #endif

src/s_sincos.c

@@ -146,5 +146,5 @@ sincos(double x, double * s, double * c)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(sincos, sincosl);
+__weak_reference(sincos, sincosl);
 #endif

src/s_tan.c

@@ -79,5 +79,5 @@ tan(double x)
 }
 
 #if (LDBL_MANT_DIG == 53)
-__strong_reference(tan, tanl);
+__weak_reference(tan, tanl);
 #endif

src/s_trunc.c

@@ -63,5 +63,5 @@ trunc(double x)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(trunc, truncl);
+__weak_reference(trunc, truncl);
 #endif

src/w_cabs.c

@@ -21,5 +21,5 @@ cabs(double complex z)
 }
 
 #if LDBL_MANT_DIG == 53
-__strong_reference(cabs, cabsl);
+__weak_reference(cabs, cabsl);
 #endif