echo "$ac_t""$ac_cv_prog_gcc" 1>&6if test $ac_cv_prog_gcc = yes; then  GCC=yeselse  GCC=fiac_test_CFLAGS="${CFLAGS+set}"ac_save_CFLAGS="$CFLAGS"CFLAGS=echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6echo "configure:1671: checking whether ${CC-cc} accepts -g" >&5if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then  echo $ac_n "(cached) $ac_c" 1>&6else  echo 'void f(){}' > conftest.cif test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then  ac_cv_prog_cc_g=yeselse  ac_cv_prog_cc_g=nofirm -f conftest*fiecho "$ac_t""$ac_cv_prog_cc_g" 1>&6if test "$ac_test_CFLAGS" = set; then  CFLAGS="$ac_save_CFLAGS"elif test $ac_cv_prog_cc_g = yes; then  if test "$GCC" = yes; then    CFLAGS="-g -O2"  else    CFLAGS="-g"  fielse  if test "$GCC" = yes; then    CFLAGS="-O2"  else    CFLAGS=  fifiif test "$compiler" = "msvcpp"; then  CPPFLAGS="/TP /ML /GX /YX /FD $CXX_PICKY_FLAGS /Fo\$*.o"elif test "$compiler" = "mwerks"; then  CPPFLAGS="$CXX_PICKY_FLAGS -o \$*.o"fiecho $ac_n "checking how to run the C++ preprocessor""... $ac_c" 1>&6echo "configure:1710: checking how to run the C++ preprocessor" >&5if test -z "$CXXCPP"; thenif eval "test \"`echo '$''{'ac_cv_prog_CXXCPP'+set}'`\" = set"; then  echo $ac_n "(cached) $ac_c" 1>&6else  ac_ext=C# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.ac_cpp='$CXXCPP $CPPFLAGS'ac_compile='${CXX-g++} -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'ac_link='${CXX-g++} -o conftest${ac_exeext} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'cross_compiling=$ac_cv_prog_cxx_cross  CXXCPP="${CXX-g++} -E"  cat > conftest.$ac_ext <<EOF#line 1723 "configure"#include "confdefs.h"#include <stdlib.h>EOFac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"{ (eval echo configure:1728: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`if test -z "$ac_err"; then  :else  echo "$ac_err" >&5  echo "configure: failed program was:" >&5  cat conftest.$ac_ext >&5  rm -rf conftest*  CXXCPP=/lib/cppfirm -f conftest*  ac_cv_prog_CXXCPP="$CXXCPP"ac_ext=C# CXXFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.ac_cpp='$CXXCPP $CPPFLAGS'ac_compile='${CXX-g++} -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'ac_link='${CXX-g++} -o conftest${ac_exeext} $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'cross_compiling=$ac_cv_prog_cxx_crossfifiCXXCPP="$ac_cv_prog_CXXCPP"echo "$ac_t""$CXXCPP" 1>&6cat > conftest.$ac_ext <<EOF#line 1753 "configure"#include "confdefs.h"#include <math.h>EOFif (eval "$ac_cpp conftest.$ac_ext") 2>&5 |  egrep "copysign" >/dev/null 2>&1; 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