Default to create progs with symbols (incl. debug)

* Set CFLAGS entirely in configure if not already set.
* Compile bcheck.c with the same flags as the other source files
* Don't strip binaries by default (GB are cheap now) but provide a
  --strip-binaries option in configure script.

configure

@@ -146,6 +146,8 @@ for opt do
   ;;
   --disable-rpath) disable_rpath="yes"
   ;;
+  --strip-binaries) strip_binaries="yes"
+  ;;
   --with-libgcc) use_libgcc="yes"
   ;;
   --with-selinux) have_selinux="yes"
@@ -157,7 +159,7 @@ done
 
 # Checking for CFLAGS
 if test -z "$CFLAGS"; then
-    CFLAGS="-O2"
+    CFLAGS="-Wall -g -O2"
 fi
 
 cc="${cross_prefix}${cc}"
@@ -253,6 +255,7 @@ echo "  --sysroot=PREFIX         prepend PREFIX to library/include paths []"
 echo "  --cc=CC                  use C compiler CC [$cc]"
 echo "  --disable-static         make libtcc.so instead of libtcc.a"
 echo "  --disable-rpath          disable use of -rpath with the above"
+echo "  --strip-binaries         strip symbol tables from resulting binaries"
 echo "  --with-libgcc            use /lib/libgcc_s.so.1 instead of libtcc.a"
 echo "  --enable-mingw32         build windows version on linux with mingw32"
 echo "  --enable-cygwin          build windows version on windows with cygwin"
@@ -419,6 +422,9 @@ fi
 if test "$disable_rpath" = "yes" ; then
   echo "DISABLE_RPATH=yes" >> config.mak
 fi
+if test "$strip_binaries" = "yes" ; then
+  echo "STRIP_BINARIES=yes" >> config.mak
+fi
 if test "$use_libgcc" = "yes" ; then
   echo "#define CONFIG_USE_LIBGCC" >> $TMPH
   echo "CONFIG_USE_LIBGCC=yes" >> config.mak