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Add -Wno-format-overflow as unfortunately this option is too dumb.

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Eg it warns on sprintf() usage even if there is a strlen() check right above it.

Fixes compile warning on Ubuntu 22.04 / GCC 11.
This commit is contained in:
Bram Matthys
2022-05-28 18:12:24 +02:00
parent 965bfa441b
commit b183a3ea7a
2 changed files with 50 additions and 0 deletions
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configure
Vendored
+48
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@@ -5638,6 +5638,54 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wformat-overflow" >&5
$as_echo_n "checking whether C compiler accepts -Wformat-overflow... " >&6; }
if ${ax_cv_check_cflags__Werror___Wformat_overflow+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_check_save_flags=$CFLAGS
CFLAGS="$CFLAGS -Werror -Wformat-overflow"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ax_cv_check_cflags__Werror___Wformat_overflow=yes
else
ax_cv_check_cflags__Werror___Wformat_overflow=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS=$ax_check_save_flags
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror___Wformat_overflow" >&5
$as_echo "$ax_cv_check_cflags__Werror___Wformat_overflow" >&6; }
if test x"$ax_cv_check_cflags__Werror___Wformat_overflow" = xyes; then :
CFLAGS="$CFLAGS -Wno-format-overflow"
else
:
fi
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
configure.ac
+2
View File
@@ -237,6 +237,8 @@ check_cc_flag([-Wformat-zero-length], [CFLAGS="$CFLAGS -Wno-format-zero-length"]
check_cc_flag([-Wformat-truncation], [CFLAGS="$CFLAGS -Wno-format-truncation"])
check_cc_flag([-Wformat-overflow], [CFLAGS="$CFLAGS -Wno-format-overflow"])
dnl While it can be useful to occasionally to compile with warnings about
dnl unused variables and parameters, we often 'think ahead' when coding things
dnl so they may be useless now but not later. Similarly, for variables, we