Configure check for double rounding should take BASECFLAGS into account

configure

 #! /bin/sh
-# From configure.in Revision: 75131 .
+# From configure.in Revision: 75658 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for python 2.7.
 #
@@ -23533,10 +23533,9 @@ fi
 # 0 otherwise.  See http://bugs.python.org/issue2937 for more info.
 { echo "$as_me:$LINENO: checking for x87-style double rounding" >&5
 echo $ECHO_N "checking for x87-style double rounding... $ECHO_C" >&6; }
-if test "${ac_cv_x87_double_rounding+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-
+# $BASECFLAGS may affect the result
+ac_save_cc="$CC"
+CC="$CC $BASECFLAGS"
 if test "$cross_compiling" = yes; then
   ac_cv_x87_double_rounding=no
 else
@@ -23600,8 +23599,7 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$a
 fi
 
 
-fi
-
+CC="$ac_save_cc"
 { echo "$as_me:$LINENO: result: $ac_cv_x87_double_rounding" >&5
 echo "${ECHO_T}$ac_cv_x87_double_rounding" >&6; }
 if test "$ac_cv_x87_double_rounding" = yes

configure.in

@@ -3348,7 +3348,9 @@ fi
 # mode is round-to-nearest and double rounding issues are present, and
 # 0 otherwise.  See http://bugs.python.org/issue2937 for more info.
 AC_MSG_CHECKING(for x87-style double rounding)
-AC_CACHE_VAL(ac_cv_x87_double_rounding, [
+# $BASECFLAGS may affect the result
+ac_save_cc="$CC"
+CC="$CC $BASECFLAGS"
 AC_TRY_RUN([
 #include <stdlib.h>
 #include <math.h>
@@ -3371,7 +3373,8 @@ int main() {
 ],
 ac_cv_x87_double_rounding=no,
 ac_cv_x87_double_rounding=yes,
-ac_cv_x87_double_rounding=no)])
+ac_cv_x87_double_rounding=no)
+CC="$ac_save_cc"
 AC_MSG_RESULT($ac_cv_x87_double_rounding)
 if test "$ac_cv_x87_double_rounding" = yes
 then