forked from Mirrors/flatpak-builder
Import ostree's compiler warnings, fix up callers
In ostree I maintain what I consider a "baseline" set of compiler warnings that should *always* be fatal for a modern C project. I noticed while working on a previous patch that a `-Werror=format` warning wasn't fatal. There are a few that are really, really important like `-Werror=missing-prototypes`. I also take some like `-Werror=misleading-indentation` which already caught some bugs. See also https://lwn.net/Articles/678019/tingping/wmclass
Colin Walters
Alexander Larsson
parent
64fd2c2a8d
commit
2618a19716
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@ -24,6 +24,7 @@ libtool
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ltmain.sh
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m4/*.m4
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!m4/glibtests.m4
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!m4/attributes.m4
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missing
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stamp-h1
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config.h.in
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@ -53,6 +53,8 @@ AM_CPPFLAGS = \
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-I$(builddir)/lib \
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$(NULL)
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AM_CFLAGS = $(WARN_CFLAGS)
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if WITH_SYSTEM_BWRAP
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AM_CPPFLAGS += -DHELPER=\"$(BWRAP)\"
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else
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@ -576,7 +576,7 @@ flatpak_get_user_base_dir_location (void)
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return g_object_ref ((GFile *)file);
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}
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GFile *
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static GFile *
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flatpak_get_user_cache_dir_location (void)
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{
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g_autoptr(GFile) base_dir = NULL;
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@ -585,7 +585,7 @@ flatpak_get_user_cache_dir_location (void)
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return g_file_get_child (base_dir, "system-cache");
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}
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GFile *
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static GFile *
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flatpak_ensure_user_cache_dir_location (GError **error)
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{
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g_autoptr(GFile) cache_dir = NULL;
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@ -603,7 +603,7 @@ flatpak_ensure_user_cache_dir_location (GError **error)
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return g_steal_pointer (&cache_dir);
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}
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GFile *
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static GFile *
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flatpak_ensure_oci_summary_cache_dir_location (GError **error)
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{
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g_autoptr(GFile) cache_dir = NULL;
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@ -658,7 +658,7 @@ flatpak_dir_get_system_helper (FlatpakDir *self)
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return NULL;
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}
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gboolean
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static gboolean
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flatpak_dir_use_system_helper (FlatpakDir *self,
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const char *installing_from_remote)
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{
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@ -2921,7 +2921,7 @@ out:
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return ret;
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}
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gboolean
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static gboolean
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flatpak_dir_run_triggers (FlatpakDir *self,
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GCancellable *cancellable,
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GError **error)
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@ -3349,7 +3349,7 @@ out:
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return ret;
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}
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gboolean
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static gboolean
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flatpak_rewrite_export_dir (const char *app,
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const char *branch,
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const char *arch,
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@ -3467,7 +3467,7 @@ out:
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return ret;
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}
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gboolean
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static gboolean
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flatpak_export_dir (GFile *source,
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GFile *destination,
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const char *symlink_prefix,
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@ -6146,7 +6146,7 @@ find_matching_ref (GHashTable *refs,
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parts[3]));
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}
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flatpak_fail (error, err->str);
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flatpak_fail (error, "%s", err->str);
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return NULL;
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}
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@ -6606,7 +6606,7 @@ flatpak_dir_remote_has_deploys (FlatpakDir *self,
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return FALSE;
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}
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gint
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static gint
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cmp_remote (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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@ -497,7 +497,7 @@ flatpak_context_set_system_bus_policy (FlatpakContext *context,
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g_hash_table_insert (context->system_bus_policy, g_strdup (name), GINT_TO_POINTER (policy));
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}
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void
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static void
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flatpak_context_apply_generic_policy (FlatpakContext *context,
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const char *key,
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const char *value)
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@ -2075,7 +2075,7 @@ create_proxy_socket (char *template)
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return g_steal_pointer (&proxy_socket);
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}
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gboolean
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static gboolean
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flatpak_run_add_system_dbus_args (FlatpakContext *context,
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char ***envp_p,
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GPtrArray *argv_array,
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@ -2127,7 +2127,7 @@ flatpak_run_add_system_dbus_args (FlatpakContext *context,
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return FALSE;
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}
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gboolean
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static gboolean
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flatpak_run_add_session_dbus_args (GPtrArray *argv_array,
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char ***envp_p,
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GPtrArray *dbus_proxy_argv,
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@ -3487,7 +3487,7 @@ add_document_portal_args (GPtrArray *argv_array,
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}
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}
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gchar *
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static gchar *
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join_args (GPtrArray *argv_array, gsize *len_out)
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{
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gchar *string;
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@ -285,7 +285,7 @@ flatpak_path_match_prefix (const char *pattern,
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return NULL; /* Should not be reached */
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}
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const char *
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static const char *
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flatpak_get_kernel_arch (void)
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{
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static struct utsname buf;
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@ -858,7 +858,7 @@ flatpak_kinds_from_bools (gboolean app, gboolean runtime)
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return kinds;
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}
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gboolean
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static gboolean
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_flatpak_split_partial_ref_arg (const char *partial_ref,
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gboolean validate,
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FlatpakKinds default_kinds,
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@ -4695,9 +4695,13 @@ flatpak_yes_no_prompt (const char *prompt, ...)
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va_list var_args;
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gchar *s;
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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va_start (var_args, prompt);
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s = g_strdup_vprintf (prompt, var_args);
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va_end (var_args);
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#pragma GCC diagnostic pop
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while (TRUE)
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{
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@ -5098,9 +5102,12 @@ flatpak_complete_word (FlatpakCompletion *completion,
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g_return_if_fail (format != NULL);
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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va_start (args, format);
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string = g_strdup_vprintf (format, args);
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va_end (args);
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#pragma GCC diagnostic pop
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if (!g_str_has_prefix (string, completion->cur))
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return;
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@ -5144,7 +5151,7 @@ flatpak_complete_ref (FlatpakCompletion *completion,
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}
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}
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int
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static int
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find_current_element (const char *str)
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{
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int count = 0;
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@ -579,8 +579,8 @@ gboolean flatpak_allocate_tmpdir (int tmpdir_dfd,
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GError **error);
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gboolean flatpak_yes_no_prompt (const char *prompt, ...);
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long flatpak_number_prompt (int min, int max, const char *prompt, ...);
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gboolean flatpak_yes_no_prompt (const char *prompt, ...) G_GNUC_PRINTF(1, 2);
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long flatpak_number_prompt (int min, int max, const char *prompt, ...) G_GNUC_PRINTF(3, 4);
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typedef void (*FlatpakLoadUriProgress) (guint64 downloaded_bytes,
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gpointer user_data);
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@ -621,7 +621,7 @@ FlatpakCompletion *flatpak_completion_new (const char *arg_line,
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const char *arg_cur);
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void flatpak_complete_word (FlatpakCompletion *completion,
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char *format,
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...);
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...) G_GNUC_PRINTF(2,3);
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void flatpak_complete_ref (FlatpakCompletion *completion,
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OstreeRepo *repo);
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void flatpak_complete_partial_ref (FlatpakCompletion *completion,
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26
configure.ac
26
configure.ac
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@ -55,12 +55,26 @@ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, "$PACKAGE", [gettext domain])
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AM_SILENT_RULES([yes])
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AM_MAINTAINER_MODE([enable])
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if test "x$GCC" = "xyes"; then
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case " $CFLAGS " in
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*[[\ \ ]]-Wall[[\ \ ]]*) ;;
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*) CFLAGS="$CFLAGS -Wall" ;;
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esac
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fi
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dnl This list is shared with https://github.com/ostreedev/ostree
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CC_CHECK_FLAGS_APPEND([WARN_CFLAGS], [CFLAGS], [\
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-pipe \
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-Wall \
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-Werror=empty-body \
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-Werror=strict-prototypes \
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-Werror=missing-prototypes \
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-Werror=implicit-function-declaration \
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"-Werror=format=2 -Werror=format-security -Werror=format-nonliteral" \
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-Werror=pointer-arith -Werror=init-self \
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-Werror=missing-declarations \
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-Werror=return-type \
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-Werror=overflow \
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-Werror=int-conversion \
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-Werror=parenthesis \
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-Werror=incompatible-pointer-types \
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-Werror=misleading-indentation \
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-Werror=missing-include-dirs -Werror=aggregate-return \
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])
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AC_SUBST(WARN_CFLAGS)
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AX_VALGRIND_CHECK
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@ -24,6 +24,7 @@
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#include "flatpak-utils.h"
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#include "flatpak-installed-ref.h"
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#include "flatpak-installed-ref-private.h"
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#include "flatpak-enum-types.h"
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/**
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@ -24,6 +24,7 @@
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#include "flatpak-utils.h"
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#include "flatpak-related-ref.h"
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#include "flatpak-related-ref-private.h"
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#include "flatpak-enum-types.h"
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/**
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@ -0,0 +1,292 @@
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dnl Macros to check the presence of generic (non-typed) symbols.
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dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
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dnl Copyright (c) 2006-2008 xine project
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dnl Copyright (c) 2012 Lucas De Marchi <lucas.de.marchi@gmail.com>
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dnl
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 2, or (at your option)
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dnl any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
|
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dnl along with this program; if not, write to the Free Software
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dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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dnl 02110-1301, USA.
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dnl
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dnl As a special exception, the copyright owners of the
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dnl macro gives unlimited permission to copy, distribute and modify the
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dnl configure scripts that are the output of Autoconf when processing the
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dnl Macro. You need not follow the terms of the GNU General Public
|
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dnl License when using or distributing such scripts, even though portions
|
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dnl of the text of the Macro appear in them. The GNU General Public
|
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dnl License (GPL) does govern all other use of the material that
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dnl constitutes the Autoconf Macro.
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dnl
|
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dnl This special exception to the GPL applies to versions of the
|
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dnl Autoconf Macro released by this project. When you make and
|
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dnl distribute a modified version of the Autoconf Macro, you may extend
|
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dnl this special exception to the GPL to apply to your modified version as
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dnl well.
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dnl Check if FLAG in ENV-VAR is supported by compiler and append it
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dnl to WHERE-TO-APPEND variable. Note that we invert -Wno-* checks to
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dnl -W* as gcc cannot test for negated warnings. If a C snippet is passed,
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dnl use it, otherwise use a simple main() definition that just returns 0.
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dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG], [C-SNIPPET])
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AC_DEFUN([CC_CHECK_FLAG_APPEND], [
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AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
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AS_TR_SH([cc_cv_$2_$3]),
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[eval "AS_TR_SH([cc_save_$2])='${$2}'"
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eval "AS_TR_SH([$2])='${cc_save_$2} -Werror `echo "$3" | sed 's/^-Wno-/-W/'`'"
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AC_LINK_IFELSE([AC_LANG_SOURCE(ifelse([$4], [],
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[int main(void) { return 0; } ],
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[$4]))],
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[eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
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[eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
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eval "AS_TR_SH([$2])='$cc_save_$2'"])
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AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
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[eval "$1='${$1} $3'"])
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])
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dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2], [C-SNIPPET])
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AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
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for flag in [$3]; do
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CC_CHECK_FLAG_APPEND([$1], [$2], $flag, [$4])
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done
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])
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dnl Check if the flag is supported by linker (cacheable)
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dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
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AC_DEFUN([CC_CHECK_LDFLAGS], [
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AC_CACHE_CHECK([if $CC supports $1 flag],
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AS_TR_SH([cc_cv_ldflags_$1]),
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[ac_save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS $1"
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AC_LINK_IFELSE([int main() { return 1; }],
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[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
|
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[eval "AS_TR_SH([cc_cv_ldflags_$1])="])
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LDFLAGS="$ac_save_LDFLAGS"
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])
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AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
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[$2], [$3])
|
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])
|
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|
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dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for
|
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dnl the current linker to avoid undefined references in a shared object.
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AC_DEFUN([CC_NOUNDEFINED], [
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dnl We check $host for which systems to enable this for.
|
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AC_REQUIRE([AC_CANONICAL_HOST])
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|
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case $host in
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dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads
|
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dnl are requested, as different implementations are present; to avoid problems
|
||||
dnl use -Wl,-z,defs only for those platform not behaving this way.
|
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*-freebsd* | *-openbsd*) ;;
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*)
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||||
dnl First of all check for the --no-undefined variant of GNU ld. This allows
|
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dnl for a much more readable command line, so that people can understand what
|
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dnl it does without going to look for what the heck -z defs does.
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for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
|
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CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
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break
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||||
done
|
||||
;;
|
||||
esac
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||||
|
||||
AC_SUBST([LDFLAGS_NOUNDEFINED])
|
||||
])
|
||||
|
||||
dnl Check for a -Werror flag or equivalent. -Werror is the GCC
|
||||
dnl and ICC flag that tells the compiler to treat all the warnings
|
||||
dnl as fatal. We usually need this option to make sure that some
|
||||
dnl constructs (like attributes) are not simply ignored.
|
||||
dnl
|
||||
dnl Other compilers don't support -Werror per se, but they support
|
||||
dnl an equivalent flag:
|
||||
dnl - Sun Studio compiler supports -errwarn=%all
|
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AC_DEFUN([CC_CHECK_WERROR], [
|
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AC_CACHE_CHECK(
|
||||
[for $CC way to treat warnings as errors],
|
||||
[cc_cv_werror],
|
||||
[CC_CHECK_CFLAGS_SILENT([-Werror], [cc_cv_werror=-Werror],
|
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[CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all])])
|
||||
])
|
||||
])
|
||||
|
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AC_DEFUN([CC_CHECK_ATTRIBUTE], [
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AC_REQUIRE([CC_CHECK_WERROR])
|
||||
AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))],
|
||||
AS_TR_SH([cc_cv_attribute_$1]),
|
||||
[ac_save_CFLAGS="$CFLAGS"
|
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CFLAGS="$CFLAGS $cc_cv_werror"
|
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([$3])],
|
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[eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
|
||||
[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
|
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CFLAGS="$ac_save_CFLAGS"
|
||||
])
|
||||
|
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AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
|
||||
[AC_DEFINE(
|
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AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
|
||||
[Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
|
||||
)
|
||||
$4],
|
||||
[$5])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
|
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CC_CHECK_ATTRIBUTE(
|
||||
[constructor],,
|
||||
[void __attribute__((constructor)) ctor() { int a; }],
|
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[$1], [$2])
|
||||
])
|
||||
|
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AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
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CC_CHECK_ATTRIBUTE(
|
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[format], [format(printf, n, n)],
|
||||
[void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
|
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[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[format_arg], [format_arg(printf)],
|
||||
[char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[visibility_$1], [visibility("$1")],
|
||||
[void __attribute__((visibility("$1"))) $1_function() { }],
|
||||
[$2], [$3])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[nonnull], [nonnull()],
|
||||
[void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[unused], ,
|
||||
[void some_function(void *foo, __attribute__((unused)) void *bar);],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[sentinel], ,
|
||||
[void some_function(void *foo, ...) __attribute__((sentinel));],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[deprecated], ,
|
||||
[void some_function(void *foo, ...) __attribute__((deprecated));],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[alias], [weak, alias],
|
||||
[void other_function(void *foo) { }
|
||||
void some_function(void *foo) __attribute__((weak, alias("other_function")));],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[malloc], ,
|
||||
[void * __attribute__((malloc)) my_alloc(int n);],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_PACKED], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[packed], ,
|
||||
[struct astructure { char a; int b; long c; void *d; } __attribute__((packed));],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_CONST], [
|
||||
CC_CHECK_ATTRIBUTE(
|
||||
[const], ,
|
||||
[int __attribute__((const)) twopow(int n) { return 1 << n; } ],
|
||||
[$1], [$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_FLAG_VISIBILITY], [
|
||||
AC_REQUIRE([CC_CHECK_WERROR])
|
||||
AC_CACHE_CHECK([if $CC supports -fvisibility=hidden],
|
||||
[cc_cv_flag_visibility],
|
||||
[cc_flag_visibility_save_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $cc_cv_werror"
|
||||
CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
|
||||
cc_cv_flag_visibility='yes',
|
||||
cc_cv_flag_visibility='no')
|
||||
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
|
||||
|
||||
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
|
||||
[AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
|
||||
[Define this if the compiler supports the -fvisibility flag])
|
||||
$1],
|
||||
[$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_FUNC_EXPECT], [
|
||||
AC_REQUIRE([CC_CHECK_WERROR])
|
||||
AC_CACHE_CHECK([if compiler has __builtin_expect function],
|
||||
[cc_cv_func_expect],
|
||||
[ac_save_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $cc_cv_werror"
|
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE(
|
||||
[int some_function() {
|
||||
int a = 3;
|
||||
return (int)__builtin_expect(a, 3);
|
||||
}])],
|
||||
[cc_cv_func_expect=yes],
|
||||
[cc_cv_func_expect=no])
|
||||
CFLAGS="$ac_save_CFLAGS"
|
||||
])
|
||||
|
||||
AS_IF([test "x$cc_cv_func_expect" = "xyes"],
|
||||
[AC_DEFINE([SUPPORT__BUILTIN_EXPECT], 1,
|
||||
[Define this if the compiler supports __builtin_expect() function])
|
||||
$1],
|
||||
[$2])
|
||||
])
|
||||
|
||||
AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
|
||||
AC_REQUIRE([CC_CHECK_WERROR])
|
||||
AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
|
||||
[cc_cv_attribute_aligned],
|
||||
[ac_save_CFLAGS="$CFLAGS"
|
||||
CFLAGS="$CFLAGS $cc_cv_werror"
|
||||
for cc_attribute_align_try in 64 32 16 8 4 2; do
|
||||
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
|
||||
int main() {
|
||||
static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
|
||||
return c;
|
||||
}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
|
||||
done
|
||||
CFLAGS="$ac_save_CFLAGS"
|
||||
])
|
||||
|
||||
if test "x$cc_cv_attribute_aligned" != "x"; then
|
||||
AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned],
|
||||
[Define the highest alignment supported])
|
||||
fi
|
||||
])
|
||||
Loading…
Reference in New Issue