From aa52c52b215405dc467800c0ee4e888fb10376e1 Mon Sep 17 00:00:00 2001
From: Alexander Traud <pabstraud@compuserve.com>
Date: Sat, 6 Jan 2018 22:40:46 +0100
Subject: BuildSystem: Really do not pass unknown-warning options to the
 compiler.

When an older GCC version is called with a too new warning option, GCC exited
with an error and Asterisk was not built. Therefore, the configure script tests
the installed compiler whether it supports that warning option. If not, Asterisk
does not pass it to the installed compiler. However, some compilers (like clang)
do not exit (error) but give just a warning in such a case. Because the compiler
did not exit, Asterisk passed the unknown-warning option.

ASTERISK-27560

Change-Id: Ia9b7747f649b27ff5e9f75c3db3fee4fe7a29621
---
 configure    | 6 +++---
 configure.ac | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/configure b/configure
index 2dd027720..c7c0c3a6e 100755
--- a/configure
+++ b/configure
@@ -18425,7 +18425,7 @@ LDFLAGS="${saved_sanitize_LDFLAGS}"
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Wdeclaration-after-statement support" >&5
 $as_echo_n "checking for -Wdeclaration-after-statement support... " >&6; }
-if $(${CC} -Wdeclaration-after-statement -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wdeclaration-after-statement -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 	AST_DECLARATION_AFTER_STATEMENT=-Wdeclaration-after-statement
@@ -18477,7 +18477,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Wno-format-truncation" >&5
 $as_echo_n "checking for -Wno-format-truncation... " >&6; }
-if $(${CC} -O2 -Wno-format-truncation -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wno-format-truncation -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 	AST_NO_FORMAT_TRUNCATION=-Wno-format-truncation
@@ -18490,7 +18490,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -Wshadow" >&5
 $as_echo_n "checking for -Wshadow... " >&6; }
-if $(${CC} -Wshadow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wshadow -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
 	AST_SHADOW_WARNINGS=-Wshadow
diff --git a/configure.ac b/configure.ac
index c617cf084..e333fafa1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1196,7 +1196,7 @@ LDFLAGS="${saved_sanitize_LDFLAGS}"
 AC_SUBST(AST_UNDEFINED_SANITIZER)
 
 AC_MSG_CHECKING(for -Wdeclaration-after-statement support)
-if $(${CC} -Wdeclaration-after-statement -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wdeclaration-after-statement -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	AC_MSG_RESULT(yes)
 	AST_DECLARATION_AFTER_STATEMENT=-Wdeclaration-after-statement
 else
@@ -1236,7 +1236,7 @@ fi
 AC_SUBST(AST_NO_STRICT_OVERFLOW)
 
 AC_MSG_CHECKING(for -Wno-format-truncation)
-if $(${CC} -O2 -Wno-format-truncation -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wno-format-truncation -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	AC_MSG_RESULT(yes)
 	AST_NO_FORMAT_TRUNCATION=-Wno-format-truncation
 else
@@ -1246,7 +1246,7 @@ fi
 AC_SUBST(AST_NO_FORMAT_TRUNCATION)
 
 AC_MSG_CHECKING(for -Wshadow)
-if $(${CC} -Wshadow -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
+if $(${CC} -Wshadow -Werror -S -o /dev/null -xc /dev/null > /dev/null 2>&1); then
 	AC_MSG_RESULT(yes)
 	AST_SHADOW_WARNINGS=-Wshadow
 else
-- 
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