re PR libfortran/16137 (Fortran compiler unable to produce executables as…

re PR libfortran/16137 (Fortran compiler unable to produce executables as libfortran depends on C99 math functions)

PR libfortran/16137
* config.h.in (HAVE_POWF): Undefine.
* configure.ac: Check for 'powf' in library.
* configure: Regenerate.
* intrinsics/c99_functions.c (powf): New function.

From-SVN: r88128

libgfortran/ChangeLog

+2004-09-26  Tobias Schlueter  <tobis.schlueter@physik.uni-muenchen.de>
+
+	PR libfortran/16137
+	* config.h.in (HAVE_POWF): Undefine.
+	* configure.ac: Check for 'powf' in library.
+	* configure: Regenerate.
+	* intrinsics/c99_functions.c (powf): New function.
+
 2004-09-24  Tobias Schlueter  <tobis.schlueter@physik.uni-muenchen.de>
 
 	* intrinsics/etime.c (etime_): New function.

libgfortran/config.h.in

@@ -114,6 +114,9 @@
 /* libm includes nextafterf */
 #undef HAVE_NEXTAFTERF
 
+/* libm includes powf */
+# undef HAVE_POWF
+
 /* libm includes round */
 #undef HAVE_ROUND
 

libgfortran/configure.ac

@@ -184,6 +184,7 @@ AC_CHECK_LIB([m],[logf],[AC_DEFINE([HAVE_LOGF],[1],[libm includes logf])])
 AC_CHECK_LIB([m],[log10f],[AC_DEFINE([HAVE_LOG10F],[1],[libm includes log10f])])
 AC_CHECK_LIB([m],[nextafter],[AC_DEFINE([HAVE_NEXTAFTER],[1],[libm includes nextafter])])
 AC_CHECK_LIB([m],[nextafterf],[AC_DEFINE([HAVE_NEXTAFTERF],[1],[libm includes nextafterf])])
+AC_CHECK_LIB([m],[powf],[AC_DEFINE([HAVE_POWF],[1],[libm includes powf])])
 AC_CHECK_LIB([m],[round],[AC_DEFINE([HAVE_ROUND],[1],[libm includes round])])
 AC_CHECK_LIB([m],[roundf],[AC_DEFINE([HAVE_ROUNDF],[1],[libm includes roundf])])
 AC_CHECK_LIB([m],[scalbnf],[AC_DEFINE([HAVE_SCALBNF],[1],[libm includes scalbnf])])

libgfortran/intrinsics/c99_functions.c

@@ -245,6 +245,15 @@ nextafterf(float x, float y)
 }
 #endif
 
+
+#ifndef HAVE_POWF
+float
+powf(float x, float y)
+{
+  return (float) pow(x, y);
+}
+#endif
+
 /* Note that if HAVE_FPCLASSIFY is not defined, then NaN is not handled */
 
 /* Algorithm by Steven G. Kargl.  */