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

diff --git a/configure b/configure
index 2dd02772039c8713fab107048659800e45dbd127..c7c0c3a6e0ec36b3f9ce3643ca0aa1d00e129a2c 100755 (executable)
--- 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 c617cf084df414b8d241482b1eea73558179a74f..e333fafa1aa6ca10b24c1bc06c802b75e117dfb9 100644 (file)
--- 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