-# sqrtl.m4 serial 3
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# sqrtl.m4 serial 7
+dnl Copyright (C) 2010-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_SQRTL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare sqrtl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = sqrtl;
long double x;]],
- [[return sqrtl (x) > 0.4;]])],
+ [[return funcptr (x) > 0.4
+ || sqrtl (x) > 0.4;]])],
[gl_cv_func_sqrtl_no_libm=yes],
[gl_cv_func_sqrtl_no_libm=no])
])
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = sqrtl;
long double x;]],
- [[return sqrtl (x) > 0.4;]])],
+ [[return funcptr (x) > 0.4
+ || sqrtl (x) > 0.4;]])],
[gl_cv_func_sqrtl_in_libm=yes],
[gl_cv_func_sqrtl_in_libm=no])
LIBS="$save_LIBS"
|| test $gl_cv_func_sqrtl_in_libm = yes; then
dnl Also check whether it's declared.
dnl MacOS X 10.3 has sqrtl() in libc but doesn't declare it in <math.h>.
- AC_CHECK_DECL([sqrtl], , [HAVE_DECL_SQRTL=0], [#include <math.h>])
+ AC_CHECK_DECL([sqrtl], , [HAVE_DECL_SQRTL=0], [[#include <math.h>]])
else
HAVE_DECL_SQRTL=0
HAVE_SQRTL=0
- AC_LIBOBJ([sqrtl])
- AC_REQUIRE([gl_FUNC_ISNANL])
- AC_REQUIRE([gl_FUNC_FREXPL])
- AC_REQUIRE([gl_FUNC_LDEXPL])
- AC_REQUIRE([gl_FUNC_SQRT])
- dnl Append $ISNANL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
- case " $SQRTL_LIBM " in
- *" $ISNANL_LIBM "*) ;;
- *) SQRTL_LIBM="$SQRTL_LIBM $ISNANL_LIBM" ;;
- esac
- dnl Append $FREXPL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
- case " $SQRTL_LIBM " in
- *" $FREXPL_LIBM "*) ;;
- *) SQRTL_LIBM="$SQRTL_LIBM $FREXPL_LIBM" ;;
- esac
- dnl Append $LDEXPL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
- case " $SQRTL_LIBM " in
- *" $LDEXPL_LIBM "*) ;;
- *) SQRTL_LIBM="$SQRTL_LIBM $LDEXPL_LIBM" ;;
- esac
- dnl Append $SQRT_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
- case " $SQRTL_LIBM " in
- *" $SQRT_LIBM "*) ;;
- *) SQRTL_LIBM="$SQRTL_LIBM $SQRT_LIBM" ;;
- esac
+ dnl Find libraries needed to link lib/sqrtl.c.
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_SQRT])
+ SQRTL_LIBM="$SQRT_LIBM"
+ else
+ AC_REQUIRE([gl_FUNC_ISNANL])
+ AC_REQUIRE([gl_FUNC_FREXPL])
+ AC_REQUIRE([gl_FUNC_LDEXPL])
+ AC_REQUIRE([gl_FUNC_SQRT])
+ dnl Append $ISNANL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
+ case " $SQRTL_LIBM " in
+ *" $ISNANL_LIBM "*) ;;
+ *) SQRTL_LIBM="$SQRTL_LIBM $ISNANL_LIBM" ;;
+ esac
+ dnl Append $FREXPL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
+ case " $SQRTL_LIBM " in
+ *" $FREXPL_LIBM "*) ;;
+ *) SQRTL_LIBM="$SQRTL_LIBM $FREXPL_LIBM" ;;
+ esac
+ dnl Append $LDEXPL_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
+ case " $SQRTL_LIBM " in
+ *" $LDEXPL_LIBM "*) ;;
+ *) SQRTL_LIBM="$SQRTL_LIBM $LDEXPL_LIBM" ;;
+ esac
+ dnl Append $SQRT_LIBM to SQRTL_LIBM, avoiding gratuitous duplicates.
+ case " $SQRTL_LIBM " in
+ *" $SQRT_LIBM "*) ;;
+ *) SQRTL_LIBM="$SQRTL_LIBM $SQRT_LIBM" ;;
+ esac
+ fi
fi
AC_SUBST([SQRTL_LIBM])
])