Index: configure.in
--- configure.in.orig
+++ configure.in
@@ -138,7 +138,7 @@ if test $DO_FILEUTILS_CHECK = yes; then
 fi
 
 dnl Check for pOS or -target=p.os
-if [[ $target = "p.os" ]]; then
+if [[ "$target" = "p.os" ]]; then
     HAVE_POS=yes
 else
   AC_MSG_CHECKING(for pOS)
@@ -617,9 +617,7 @@ fi
 
 if test $ac_cv_c_compiler_gnu = yes; then
   WARNING_CFLAGS="-Wall -Wno-unused -Wno-format -W -Wmissing-prototypes -Wstrict-prototypes"
-  OPTIMIZE_CFLAGS="-O2 -fomit-frame-pointer"
-  dnl Not nice, but needed to turn off -g
-  CFLAGS=
+  OPTIMIZE_CFLAGS="-fomit-frame-pointer"
 fi
 
 if [[ "x$DO_PROFILING" = "xyes" ]]; then
@@ -710,21 +708,21 @@ dnl See if we have something better than GCC 2.7.
 if [[ "x$HAVEGCC27" = "xyes" -a "x$HAVEI386" = "xyes" ]]; then
   SAVECFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -mno-schedule-prologue"
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int main(){return 0;}]])],[NO_SCHED_CFLAGS="-mno-schedule-prologue"],[])
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[NO_SCHED_CFLAGS="-mno-schedule-prologue"],[])
   CFLAGS=$SAVECFLAGS
 fi
 
 if [[ "x$HAVEGCC27" = "xyes" -a "x$HAVEI386" = "xyes" ]]; then
   SAVECFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -mpreferred-stack-boundary=2"
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int main(){return 0;}]])],[SAVECFLAGS=$CFLAGS],[])
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[SAVECFLAGS=$CFLAGS],[])
   CFLAGS=$SAVECFLAGS
 fi
 
 if [[ "x$HAVEGCC27" = "xyes" -a "x$HAVEI386" = "xyes" ]]; then
   SAVECFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -fno-reorder-blocks"
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int main(){return 0;}]])],[NO_REORDER_CFLAGS="-fno-reorder-blocks"],[])
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[NO_REORDER_CFLAGS="-fno-reorder-blocks"],[])
   CFLAGS=$SAVECFLAGS
 fi
 
@@ -734,7 +732,7 @@ if [[ "x$HAVEGCC27" = "xyes" -a "x$HAVEI386" = "xyes" 
   SAVECFLAGS=$CFLAGS
   CFLAGS="$CFLAGS -fno-exceptions"
   NOEXCEPTIONS=no
-  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int main(){return 0;}]])],[NOEXCEPTIONS=yes],[])
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[NOEXCEPTIONS=yes],[])
   if [[ "x$NOEXCEPTIONS" = "xno" ]]; then
     CFLAGS=$SAVECFLAGS
   fi
