From d6296cf803b7774e6c7d8d3a225fde516993b2cd Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Mon, 9 Nov 2020 15:33:46 +0100
Subject: [PATCH v1 1/3] Add -Wformat-signedness

---
 configure    | 40 ++++++++++++++++++++++++++++++++++++++++
 configure.ac |  1 +
 2 files changed, 41 insertions(+)

diff --git a/configure b/configure
index ace4ed5dec..503f5ea14b 100755
--- a/configure
+++ b/configure
@@ -5738,6 +5738,46 @@ if test x"$pgac_cv_prog_CXX_cxxflags__Wcast_function_type" = x"yes"; then
 fi
 
 
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} supports -Wformat-signedness, for CFLAGS" >&5
+$as_echo_n "checking whether ${CC} supports -Wformat-signedness, for CFLAGS... " >&6; }
+if ${pgac_cv_prog_CC_cflags__Wformat_signedness+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  pgac_save_CFLAGS=$CFLAGS
+pgac_save_CC=$CC
+CC=${CC}
+CFLAGS="${CFLAGS} -Wformat-signedness"
+ac_save_c_werror_flag=$ac_c_werror_flag
+ac_c_werror_flag=yes
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  pgac_cv_prog_CC_cflags__Wformat_signedness=yes
+else
+  pgac_cv_prog_CC_cflags__Wformat_signedness=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_c_werror_flag=$ac_save_c_werror_flag
+CFLAGS="$pgac_save_CFLAGS"
+CC="$pgac_save_CC"
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CC_cflags__Wformat_signedness" >&5
+$as_echo "$pgac_cv_prog_CC_cflags__Wformat_signedness" >&6; }
+if test x"$pgac_cv_prog_CC_cflags__Wformat_signedness" = x"yes"; then
+  CFLAGS="${CFLAGS} -Wformat-signedness"
+fi
+
+
   # This was included in -Wall/-Wformat in older GCC versions
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CC} supports -Wformat-security, for CFLAGS" >&5
diff --git a/configure.ac b/configure.ac
index 5b91c83fd0..ad1f2e5943 100644
--- a/configure.ac
+++ b/configure.ac
@@ -503,6 +503,7 @@ if test "$GCC" = yes -a "$ICC" = no; then
   PGAC_PROG_CXX_CFLAGS_OPT([-Wimplicit-fallthrough=3])
   PGAC_PROG_CC_CFLAGS_OPT([-Wcast-function-type])
   PGAC_PROG_CXX_CFLAGS_OPT([-Wcast-function-type])
+  PGAC_PROG_CC_CFLAGS_OPT([-Wformat-signedness])
   # This was included in -Wall/-Wformat in older GCC versions
   PGAC_PROG_CC_CFLAGS_OPT([-Wformat-security])
   PGAC_PROG_CXX_CFLAGS_OPT([-Wformat-security])

base-commit: 8f113698b63b15a4e0a4b15d3ee37238c1d1821d
-- 
2.29.1