Detect whether we actually have the long double type, before looking for those functions.

(closes issue #15017)
 Reported by: tzafrir
 Patches: 
       20090916__issue15017.diff.txt uploaded by tilghman (license 14)
 Tested by: tzafrir


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@219007 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 180 insertions, 3 deletions

diff --git a/configure b/configure
index f7ed37290..02a04886c 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 217074 .
+# From configure.ac Revision: 217638 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.6.
 #
@@ -12718,6 +12718,83 @@ _ACEOF
     ;;
 esac
 
+
+  { echo "$as_me:$LINENO: checking for long double with more range or precision than double" >&5
+echo $ECHO_N "checking for long double with more range or precision than double... $ECHO_C" >&6; }
+if test "${ac_cv_type_long_double_wider+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <float.h>
+	    long double const a[] =
+	      {
+		 0.0L, DBL_MIN, DBL_MAX, DBL_EPSILON,
+		 LDBL_MIN, LDBL_MAX, LDBL_EPSILON
+	      };
+	    long double
+	    f (long double x)
+	    {
+	       return ((x + (unsigned long int) 10) * (-1 / x) + a[0]
+			+ (x ? f (x) : 'c'));
+	    }
+
+int
+main ()
+{
+static int test_array [1 - 2 * !((0 < ((DBL_MAX_EXP < LDBL_MAX_EXP)
+		   + (DBL_MANT_DIG < LDBL_MANT_DIG)
+		   - (LDBL_MAX_EXP < DBL_MAX_EXP)
+		   - (LDBL_MANT_DIG < DBL_MANT_DIG)))
+	    && (int) LDBL_EPSILON == 0
+	  )];
+test_array [0] = 0
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_type_long_double_wider=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_type_long_double_wider=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_type_long_double_wider" >&5
+echo "${ECHO_T}$ac_cv_type_long_double_wider" >&6; }
+  if test $ac_cv_type_long_double_wider = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_LONG_DOUBLE_WIDER 1
+_ACEOF
+
+  fi
+
 { echo "$as_me:$LINENO: checking for mode_t" >&5
 echo $ECHO_N "checking for mode_t... $ECHO_C" >&6; }
 if test "${ac_cv_type_mode_t+set}" = set; then
@@ -16631,7 +16708,8 @@ fi
 done
 
 
-# BSD might not have exp2, and/or log2
+# NOTE: we use AC_CHECK_LIB to get -lm into the arguments for later checks,
+# so that AC_CHECK_FUNCS can detect functions in that library.
 
 { echo "$as_me:$LINENO: checking for sqrt in -lm" >&5
 echo $ECHO_N "checking for sqrt in -lm... $ECHO_C" >&6; }
@@ -16703,6 +16781,7 @@ _ACEOF
 
 fi
 
+# BSD might not have exp2, and/or log2
 
 
 
@@ -16724,9 +16803,103 @@ fi
 
 
 
+for ac_func in exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round trunc floor ceil
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+{ echo "$as_me:$LINENO: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6; }
+if { as_var=$as_ac_var; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $ac_func innocuous_$ac_func
 
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
 
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
 
+#undef $ac_func
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$ac_func || defined __stub___$ac_func
+choke me
+#endif
+
+int
+main ()
+{
+return $ac_func ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext &&
+       $as_test_x conftest$ac_exeext; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	eval "$as_ac_var=no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+ac_res=`eval echo '${'$as_ac_var'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+# Certain architectures don't really have long double, even though
+# AC_CHECK_FUNCS would otherwise find the following functions.
+if test "x${ac_cv_type_long_double_wider}" = "xyes" ; then
 
 
 
@@ -16746,7 +16919,10 @@ fi
 
 
 
-for ac_func in exp2l log2l exp10l log10l sinl cosl tanl asinl acosl atanl atan2l powl sqrtl rintl expl logl remainderl fmodl roundl truncl floorl ceill exp2 log2 exp10 log10 sin cos tan asin acos atan atan2 pow rint exp log remainder fmod round trunc floor ceil
+
+
+
+for ac_func in exp2l log2l exp10l log10l sinl cosl tanl asinl acosl atanl atan2l powl sqrtl rintl expl logl remainderl fmodl roundl truncl floorl ceill
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 { echo "$as_me:$LINENO: checking for $ac_func" >&5
@@ -16839,6 +17015,7 @@ _ACEOF
 fi
 done
 
+fi
 
 { echo "$as_me:$LINENO: checking for timersub in time.h" >&5
 echo $ECHO_N "checking for timersub in time.h... $ECHO_C" >&6; }