diff -up gutenprint-5.2.12-pre3/configure.ac.O6 gutenprint-5.2.12-pre3/configure.ac
--- gutenprint-5.2.12-pre3/configure.ac.O6	2016-10-14 10:41:54.290398824 +0200
+++ gutenprint-5.2.12-pre3/configure.ac	2016-10-14 10:44:04.921328215 +0200
@@ -638,27 +638,6 @@ AH_TEMPLATE(PKGMODULEDIR,, [Package modu
 PKGMODULEDIR="${PACKAGE_LIB_DIR}/${GUTENPRINT_RELEASE_VERSION}/modules"
 AC_DEFINE_UNQUOTED(PKGMODULEDIR, ["$PKGMODULEDIR"])
 
-dnl Compiler flags
-if test x$ac_compiler_gnu = "xyes"; then
-  STP_ADD_COMPILER_ARGS([-Wall -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wwrite-strings -Werror-implicit-function-declaration -Winline -Wformat=2 -finline-limit=131072],, [GNUCFLAGS])
-  if test x${USE_MAINTAINER_MODE} = xyes ; then
-    STP_ADD_COMPILER_ARGS([-D_POSIX_C_SOURCE=200809L -std=c99 -pedantic -Waggregate-return -Wcast-qual -Wshadow -Wredundant-decls],, [GNUCFLAGS])
-  fi
-  if test x$ENABLE_DEBUG = xyes ; then
-    STP_ADD_COMPILER_ARG([-g])
-  else
-    STP_ADD_FIRST_COMPILER_ARG([-O6 -O3 -O2 -O1 -O])
-  fi
-else
-  if test x$ENABLE_DEBUG = xyes ; then
-    STP_ADD_COMPILER_ARG([-g])
-  else
-    STP_ADD_FIRST_COMPILER_ARG([-O])
-  fi
-fi
-if test x$ENABLE_PROFILE = xyes ; then
-  STP_ADD_COMPILER_ARG([-pg])
-fi
 AC_SUBST(GNUCFLAGS)
 
 AH_TEMPLATE([HAVE_GCC_ATTRIBUTES],
diff -up gutenprint-5.2.12-pre3/configure.O6 gutenprint-5.2.12-pre3/configure
--- gutenprint-5.2.12-pre3/configure.O6	2016-10-14 10:41:54.293398800 +0200
+++ gutenprint-5.2.12-pre3/configure	2016-10-14 10:53:25.392709079 +0200
@@ -17651,246 +17651,6 @@ cat >>confdefs.h <<_ACEOF
 #define PKGMODULEDIR "$PKGMODULEDIR"
 _ACEOF
 
-
-if test x$ac_compiler_gnu = "xyes"; then
-
-  for stp_ac_arg in -Wall -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Wwrite-strings -Werror-implicit-function-declaration -Winline -Wformat=2 -finline-limit=131072 ; do
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports ${stp_ac_arg}" >&5
-$as_echo_n "checking if ${CC} supports ${stp_ac_arg}... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${GNUCFLAGS} ${stp_ac_arg}"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  GNUCFLAGS="${stp_newCFLAGS}"
-
-  done
-
-  if test x${USE_MAINTAINER_MODE} = xyes ; then
-
-  for stp_ac_arg in -D_POSIX_C_SOURCE=200809L -std=c99 -pedantic -Waggregate-return -Wcast-qual -Wshadow -Wredundant-decls ; do
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports ${stp_ac_arg}" >&5
-$as_echo_n "checking if ${CC} supports ${stp_ac_arg}... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${GNUCFLAGS} ${stp_ac_arg}"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  GNUCFLAGS="${stp_newCFLAGS}"
-
-  done
-
-  fi
-  if test x$ENABLE_DEBUG = xyes ; then
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports -g" >&5
-$as_echo_n "checking if ${CC} supports -g... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${CFLAGS} -g"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  CFLAGS="${stp_newCFLAGS}"
-
-  else
-
-  for stp_ac_arg in -O6 -O3 -O2 -O1 -O ; do
-    stp_ac_save_CFLAGS="${CFLAGS}"
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports ${stp_ac_arg}" >&5
-$as_echo_n "checking if ${CC} supports ${stp_ac_arg}... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${CFLAGS} ${stp_ac_arg}"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  CFLAGS="${stp_newCFLAGS}"
-
-    test "${stp_ac_save_CFLAGS}" != "${CFLAGS}" && break
-  done
-
-  fi
-else
-  if test x$ENABLE_DEBUG = xyes ; then
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports -g" >&5
-$as_echo_n "checking if ${CC} supports -g... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${CFLAGS} -g"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  CFLAGS="${stp_newCFLAGS}"
-
-  else
-
-  for stp_ac_arg in -O ; do
-    stp_ac_save_CFLAGS="${CFLAGS}"
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports ${stp_ac_arg}" >&5
-$as_echo_n "checking if ${CC} supports ${stp_ac_arg}... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${CFLAGS} ${stp_ac_arg}"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  CFLAGS="${stp_newCFLAGS}"
-
-    test "${stp_ac_save_CFLAGS}" != "${CFLAGS}" && break
-  done
-
-  fi
-fi
-if test x$ENABLE_PROFILE = xyes ; then
-
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking if ${CC} supports -pg" >&5
-$as_echo_n "checking if ${CC} supports -pg... " >&6; }
-  stp_acOLDCFLAGS="${CFLAGS}"
-  CFLAGS="${CFLAGS} -pg"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; };
-        stp_newCFLAGS="$CFLAGS"
-else
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; };
-	stp_newCFLAGS="$stp_acOLDCFLAGS"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-  CFLAGS="$stp_acOLDCFLAGS"
-  CFLAGS="${stp_newCFLAGS}"
-
-fi
-
-
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC supports __attribute__ syntax" >&5
 $as_echo_n "checking if $CC supports __attribute__ syntax... " >&6; }
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
