-# sqrtl.m4 serial 1
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# sqrtl.m4 serial 4
+dnl Copyright (C) 2010-2011 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_CACHE_CHECK([whether sqrtl() can be used without linking with libm],
[gl_cv_func_sqrtl_no_libm],
[
- AC_TRY_LINK([#ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [return sqrtl (x) > 0.4;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double x;]],
+ [[return sqrtl (x) > 0.4;]])],
[gl_cv_func_sqrtl_no_libm=yes],
[gl_cv_func_sqrtl_no_libm=no])
])
[
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
- AC_TRY_LINK([#ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [return sqrtl (x) > 0.4;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double x;]],
+ [[return sqrtl (x) > 0.4;]])],
[gl_cv_func_sqrtl_in_libm=yes],
[gl_cv_func_sqrtl_in_libm=no])
LIBS="$save_LIBS"
else
HAVE_DECL_SQRTL=0
HAVE_SQRTL=0
- AC_LIBOBJ([sqrtl])
+ dnl Find libraries needed to link lib/sqrtl.c.
AC_REQUIRE([gl_FUNC_ISNANL])
AC_REQUIRE([gl_FUNC_FREXPL])
AC_REQUIRE([gl_FUNC_LDEXPL])
AC_REQUIRE([gl_FUNC_SQRT])
- SQRTL_LIBM="$ISNANL_LIBM $FREXPL_LIBM $LDEXPL_LIBM $SQRT_LIBM"
+ 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
AC_SUBST([SQRTL_LIBM])
])