Update.

1998-07-23  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/glob.c: Fix two problems with GLOB_DOOFFS.
	Reported by bwelling@anomaly.munge.com [PR libc/720].

	* sysdeps/libm-ieee754/k_standard.c: Return NAN for libm not in
	SVID more for gamma(x) with x interger <= 0.
	Reported by Stephen L Moshier <moshier@mediaone.net>.

	* math/libm-test.c (gamma_test): Add test for gamma(-1) and gamma(0).
	Correct test for SVID version of gamma.

	* sysdeps/libm-ieee754/w_gamma.c: Use correct matherr call in SVID
	emulation mode.
	* sysdeps/libm-ieee754/w_gammaf.c: Likewise.
	* sysdeps/libm-ieee754/w_gammal.c: Likewise.

	* string/string.h: Don't use string function optimization for C++
	as long as we use macros.

4 files changed, 62 insertions, 25 deletions

diff --git a/sysdeps/libm-ieee754/k_standard.c b/sysdeps/libm-ieee754/k_standard.c
index aeaa50f2ee..82cfbe467a 100644
--- a/sysdeps/libm-ieee754/k_standard.c
+++ b/sysdeps/libm-ieee754/k_standard.c
@@ -845,12 +845,13 @@ static double zero = 0.0;	/* used as const */
 		exc.type = SING;
 		exc.name = type < 100 ? "gamma" : (type < 200
 						   ? "gammaf" : "gammal");
-		exc.retval = HUGE_VAL;
+		exc.retval = NAN;
 		if (_LIB_VERSION == _POSIX_)
 		  __set_errno (EDOM);
 		else if (!matherr(&exc)) {
 		  if (_LIB_VERSION == _SVID_) {
 			(void) WRITE2("gamma: SING error\n", 18);
+			exc.retval = HUGE_VAL;
 		      }
 		  __set_errno (EDOM);
 		}
diff --git a/sysdeps/libm-ieee754/w_gamma.c b/sysdeps/libm-ieee754/w_gamma.c
index 02a3d47669..3511b67d77 100644
--- a/sysdeps/libm-ieee754/w_gamma.c
+++ b/sysdeps/libm-ieee754/w_gamma.c
@@ -32,7 +32,18 @@ static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $";
         double y;
 #ifndef _IEEE_LIBM
 	if (_LIB_VERSION == _SVID_)
-	  y = __ieee754_lgamma_r(x,&signgam);
+	  {
+	    y = __ieee754_lgamma_r(x,&signgam);
+
+	    if(!__finite(y)&&__finite(x)) {
+	      if(__floor(x)==x&&x<=(double)0.0)
+		/* lgamma pole */
+		return __kernel_standard(x,x,15);
+	      else
+		/* lgamma overflow */
+		return __kernel_standard(x,x,14);
+	    }
+	  }
 	else
 	  {
 #endif
@@ -43,14 +54,15 @@ static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $";
 	    return y;
 #else
 	    if(_LIB_VERSION == _IEEE_) return y;
-	  }
-        if(!__finite(y)&&__finite(x)) {
-            if(__floor(x)==x&&x<=0.0)
+
+	    if(!__finite(y)&&__finite(x)) {
+	      if(__floor(x)==x&&x<=0.0)
                 return __kernel_standard(x,x,41); /* gamma pole */
-            else
+	      else
                 return __kernel_standard(x,x,40); /* gamma overflow */
-        } else
-            return y;
+	    }
+	  }
+	return y;
 #endif
 }
 weak_alias (__gamma, gamma)
diff --git a/sysdeps/libm-ieee754/w_gammaf.c b/sysdeps/libm-ieee754/w_gammaf.c
index 7d78a52908..bc251b3554 100644
--- a/sysdeps/libm-ieee754/w_gammaf.c
+++ b/sysdeps/libm-ieee754/w_gammaf.c
@@ -30,7 +30,18 @@ static char rcsid[] = "$NetBSD: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $";
         float y;
 #ifndef _IEEE_LIBM
 	if (_LIB_VERSION == _SVID_)
-	  y = __ieee754_lgammaf_r(x,&signgam);
+	  {
+	    y = __ieee754_lgammaf_r(x,&signgam);
+
+	    if(!__finitef(y)&&__finitef(x)) {
+	      if(__floorf(x)==x&&x<=(float)0.0)
+		/* lgammaf pole */
+		return (float)__kernel_standard((double)x,(double)x,115);
+	      else
+		/* lgammaf overflow */
+		return (float)__kernel_standard((double)x,(double)x,114);
+	    }
+	  }
 	else
 	  {
 #endif
@@ -41,16 +52,17 @@ static char rcsid[] = "$NetBSD: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $";
 	    return y;
 #else
 	    if(_LIB_VERSION == _IEEE_) return y;
+
+	    if(!__finitef(y)&&__finitef(x)) {
+	      if(__floorf(x)==x&&x<=(float)0.0)
+		/* gammaf pole */
+		return (float)__kernel_standard((double)x,(double)x,141);
+	      else
+		/* gammaf overflow */
+		return (float)__kernel_standard((double)x,(double)x,140);
+	    }
 	  }
-        if(!__finitef(y)&&__finitef(x)) {
-            if(__floorf(x)==x&&x<=(float)0.0)
-	        /* gammaf pole */
-                return (float)__kernel_standard((double)x,(double)x,141);
-            else
-	        /* gammaf overflow */
-                return (float)__kernel_standard((double)x,(double)x,140);
-        } else
-            return y;
+	return y;
 #endif
 }
 weak_alias (__gammaf, gammaf)
diff --git a/sysdeps/libm-ieee754/w_gammal.c b/sysdeps/libm-ieee754/w_gammal.c
index 1b4ae2cc7b..68328f652a 100644
--- a/sysdeps/libm-ieee754/w_gammal.c
+++ b/sysdeps/libm-ieee754/w_gammal.c
@@ -35,7 +35,18 @@ static char rcsid[] = "$NetBSD: $";
         long double y;
 #ifndef _IEEE_LIBM
 	if (_LIB_VERSION == _SVID_)
-	  y = __ieee754_lgammal_r(x,&signgam);
+	  {
+	    y = __ieee754_lgammal_r(x,&signgam);
+
+	    if(!__finitel(y)&&__finitel(x)) {
+	      if(__floorl(x)==x&&x<=(long double)0.0)
+		/* lgamma pole */
+		return (long double)__kernel_standard((double)x,(double)x,15);
+	      else
+		/* lgamma overflow */
+		return (long double)__kernel_standard((double)x,(double)x,14);
+	    }
+	  }
 	else
 	  {
 #endif
@@ -46,14 +57,15 @@ static char rcsid[] = "$NetBSD: $";
 	    return y;
 #else
 	    if(_LIB_VERSION == _IEEE_) return y;
-	  }
-        if(!__finitel(y)&&__finitel(x)) {
-            if(__floorl(x)==x&&x<=0.0)
+
+	    if(!__finitel(y)&&__finitel(x)) {
+	      if(__floorl(x)==x&&x<=0.0)
                 return __kernel_standard(x,x,241); /* gamma pole */
-            else
+	      else
                 return __kernel_standard(x,x,240); /* gamma overflow */
-        } else
-            return y;
+	    }
+	  }
+	return y;
 #endif
 }
 weak_alias (__gammal, gammal)