mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager
synced 2024-07-23 11:14:29 +00:00
build/clang: fix detection of valid warning compiler flags
clang does not exit with error when it is called with an unrecognized (warning) option. Instead it just prints a warning that makes the configure script believe the warning is supported. Later, during build we might pass -Werror, which causes clang to fail due to unrecognized arguments. Fix the script to detect compiler warnings by passing '-Werror=unknown-warning-option', which lets clang fail too. Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
parent
1de6d83e29
commit
5009f2c7a3
|
@ -7,6 +7,23 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
|
||||||
AC_MSG_RESULT(yes)
|
AC_MSG_RESULT(yes)
|
||||||
CFLAGS="-Wall -std=gnu89 $CFLAGS"
|
CFLAGS="-Wall -std=gnu89 $CFLAGS"
|
||||||
|
|
||||||
|
dnl clang only warns about unknown warnings, unless
|
||||||
|
dnl called with "-Werror=unknown-warning-option"
|
||||||
|
dnl Test if the compiler supports that, and if it does
|
||||||
|
dnl attach it to the CFLAGS.
|
||||||
|
SAVE_CFLAGS="$CFLAGS"
|
||||||
|
EXTRA_CFLAGS="-Werror=unknown-warning-option"
|
||||||
|
CFLAGS="$SAVE_CFLAGS $EXTRA_CFLAGS"
|
||||||
|
AC_TRY_COMPILE([], [],
|
||||||
|
has_option=yes,
|
||||||
|
has_option=no,)
|
||||||
|
if test $has_option = no; then
|
||||||
|
EXTRA_CFLAGS=
|
||||||
|
fi
|
||||||
|
CFLAGS="$SAVE_CFLAGS"
|
||||||
|
unset has_option
|
||||||
|
unset SAVE_CFLAGS
|
||||||
|
|
||||||
for option in -Wshadow -Wmissing-declarations -Wmissing-prototypes \
|
for option in -Wshadow -Wmissing-declarations -Wmissing-prototypes \
|
||||||
-Wdeclaration-after-statement -Wformat-security \
|
-Wdeclaration-after-statement -Wformat-security \
|
||||||
-Wfloat-equal -Wno-unused-parameter -Wno-sign-compare \
|
-Wfloat-equal -Wno-unused-parameter -Wno-sign-compare \
|
||||||
|
@ -15,19 +32,22 @@ if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
|
||||||
-Wpointer-arith -Winit-self \
|
-Wpointer-arith -Winit-self \
|
||||||
-Wmissing-include-dirs -Waggregate-return; do
|
-Wmissing-include-dirs -Waggregate-return; do
|
||||||
SAVE_CFLAGS="$CFLAGS"
|
SAVE_CFLAGS="$CFLAGS"
|
||||||
CFLAGS="$CFLAGS $option"
|
CFLAGS="$CFLAGS $EXTRA_CFLAGS $option"
|
||||||
AC_MSG_CHECKING([whether gcc understands $option])
|
AC_MSG_CHECKING([whether gcc understands $option])
|
||||||
AC_TRY_COMPILE([], [],
|
AC_TRY_COMPILE([], [],
|
||||||
has_option=yes,
|
has_option=yes,
|
||||||
has_option=no,)
|
has_option=no,)
|
||||||
if test $has_option = no; then
|
if test $has_option = no; then
|
||||||
CFLAGS="$SAVE_CFLAGS"
|
CFLAGS="$SAVE_CFLAGS"
|
||||||
|
else
|
||||||
|
CFLAGS="$SAVE_CFLAGS $option"
|
||||||
fi
|
fi
|
||||||
AC_MSG_RESULT($has_option)
|
AC_MSG_RESULT($has_option)
|
||||||
unset has_option
|
unset has_option
|
||||||
unset SAVE_CFLAGS
|
unset SAVE_CFLAGS
|
||||||
done
|
done
|
||||||
unset option
|
unset option
|
||||||
|
unset EXTRA_CFLAGS
|
||||||
if test "x$set_more_warnings" = xerror; then
|
if test "x$set_more_warnings" = xerror; then
|
||||||
CFLAGS="$CFLAGS -Werror"
|
CFLAGS="$CFLAGS -Werror"
|
||||||
fi
|
fi
|
||||||
|
|
Loading…
Reference in a new issue