-Wformat is needed by gcc 4.8 (closes #17547)
diff --git a/Misc/NEWS b/Misc/NEWS
index 2c09420..3e177ca 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -95,6 +95,9 @@
Build
-----
+- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC
+ 4.8.
+
- Issue #17682: Add the _io module to Modules/Setup.dist (commented out).
- Issue #17086: Search the include and library directories provided by the
diff --git a/configure b/configure
index 528aa51..dc0dfd0 100755
--- a/configure
+++ b/configure
@@ -6253,7 +6253,7 @@
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether gcc supports ParseTuple __format__" >&5
$as_echo_n "checking whether gcc supports ParseTuple __format__... " >&6; }
save_CFLAGS=$CFLAGS
- CFLAGS="$CFLAGS -Werror"
+ CFLAGS="$CFLAGS -Werror -Wformat"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
diff --git a/configure.ac b/configure.ac
index cb2a958..30f5bf4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1326,7 +1326,7 @@
then
AC_MSG_CHECKING(whether gcc supports ParseTuple __format__)
save_CFLAGS=$CFLAGS
- CFLAGS="$CFLAGS -Werror"
+ CFLAGS="$CFLAGS -Werror -Wformat"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[void f(char*,...)__attribute((format(PyArg_ParseTuple, 1, 2)));]], [[]])
],[