We might want to belt-and-braces this by backporting the fix to LLVM too?  
https://github.com/llvm/llvm-project/issues/6057

Ross

> On 19 Oct 2023, at 18:44, Khem Raj via lists.openembedded.org 
> <raj.khem=gmail....@lists.openembedded.org> wrote:
> 
> Clang finds it, gcc does not.
> 
> Signed-off-by: Khem Raj <raj.k...@gmail.com>
> ---
> v2: Some more warnings fixed with clang
> .../0001-Fix-literal-as-per-c-11.patch        | 279 ++++++++++++++++++
> ...001-Fix-string-literal-concatenation.patch |  39 +++
> .../shared-mime-info/shared-mime-info_git.bb  |   5 +-
> 3 files changed, 322 insertions(+), 1 deletion(-)
> create mode 100644 
> meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-literal-as-per-c-11.patch
> create mode 100644 
> meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-string-literal-concatenation.patch
> 
> diff --git 
> a/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-literal-as-per-c-11.patch
>  
> b/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-literal-as-per-c-11.patch
> new file mode 100644
> index 00000000000..25f409c206e
> --- /dev/null
> +++ 
> b/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-literal-as-per-c-11.patch
> @@ -0,0 +1,279 @@
> +From 157c16b09f54741aefbc4be6a3507455f0378389 Mon Sep 17 00:00:00 2001
> +From: Biswapriyo Nath <nathbap...@gmail.com>
> +Date: Sun, 8 Oct 2023 13:26:43 +0000
> +Subject: [PATCH] Fix missing sentinel warning with clang
> +
> +This fixes the compiler warnings similar as following.
> +
> +../src/update-mime-database.cpp:393:50: warning: missing sentinel in 
> function call [-Wsentinel]
> +  393 |                         g_strconcat(namespaceURI, " ", localName, 
> NULL),
> +      |                                                                      
>  ^
> +      |                                                                      
>  , nullptr
> +
> +Upstream-Status: Backport 
> [https://gitlab.freedesktop.org/xdg/shared-mime-info/-/commit/157c16b09f54741aefbc4be6a3507455f0378389]
> +Signed-off-by: Khem Raj <raj.k...@gmail.com>
> +---
> + src/update-mime-database.cpp | 58 ++++++++++++++++++------------------
> + 1 file changed, 29 insertions(+), 29 deletions(-)
> +
> +--- a/src/update-mime-database.cpp
> ++++ b/src/update-mime-database.cpp
> +@@ -390,7 +390,7 @@ static void add_namespace(Type *type, co
> + }
> + 
> + g_hash_table_insert(namespace_hash,
> +- g_strconcat(namespaceURI, " ", localName, NULL),
> ++ g_strconcat(namespaceURI, " ", localName, nullptr),
> + type);
> + }
> + 
> +@@ -1023,7 +1023,7 @@ static void write_out_type(gpointer key,
> + char *lower;
> + 
> + lower = g_ascii_strdown(type->media, -1);
> +- media = g_strconcat(mime_dir, "/", lower, NULL);
> ++ media = g_strconcat(mime_dir, "/", lower, nullptr);
> + g_free(lower);
> + #ifdef _WIN32
> + fs::create_directory(media);
> +@@ -1032,7 +1032,7 @@ static void write_out_type(gpointer key,
> + #endif
> + 
> + lower = g_ascii_strdown(type->subtype, -1);
> +- filename = g_strconcat(media, "/", lower, ".xml.new", NULL);
> ++ filename = g_strconcat(media, "/", lower, ".xml.new", nullptr);
> + g_free(lower);
> + g_free(media);
> + media = NULL;
> +@@ -1622,7 +1622,7 @@ static Magic *magic_new(xmlNode *node, T
> + magic_free(magic);
> + magic = NULL;
> + (*error)->message = g_strconcat(
> +- _("Error in <match> element: "), old, NULL);
> ++ _("Error in <match> element: "), old, nullptr);
> + g_free(old);
> + } else if (magic->matches == NULL) {
> + magic_free(magic);
> +@@ -1843,7 +1843,7 @@ static TreeMagic *tree_magic_new(xmlNode
> + tree_magic_free(magic);
> + magic = NULL;
> + (*error)->message = g_strconcat(
> +- _("Error in <treematch> element: "), old, NULL);
> ++ _("Error in <treematch> element: "), old, nullptr);
> + g_free(old);
> + }
> + }
> +@@ -1960,7 +1960,7 @@ static void delete_old_types(const gchar
> + 
> + for (i = 0; i < G_N_ELEMENTS(media_types); i++)
> + {
> +- const fs::path media_dir = g_strconcat(mime_dir, "/", media_types[i], 
> NULL);
> ++ const fs::path media_dir = g_strconcat(mime_dir, "/", media_types[i], 
> nullptr);
> + 
> + if (!fs::is_directory(fs::status(media_dir)))
> + continue;
> +@@ -1973,13 +1973,13 @@ static void delete_old_types(const gchar
> + continue;
> + 
> + char *type_name = g_strconcat(media_types[i], "/",
> +- dir_entry.path().filename().string().c_str(), NULL);
> ++ dir_entry.path().filename().string().c_str(), nullptr);
> + type_name[strlen(type_name) - 4] = '\0';
> + if (!g_hash_table_lookup(types, type_name))
> + {
> + char *path;
> + path = g_strconcat(mime_dir, "/",
> +- type_name, ".xml", NULL);
> ++ type_name, ".xml", nullptr);
> + #if 0
> + g_warning("Removing old info for type %s",
> + path);
> +@@ -2002,7 +2002,7 @@ static void add_ns(gpointer key, gpointe
> + Type *type = (Type *) value;
> + 
> + g_ptr_array_add(lines, g_strconcat(ns, " ", type->media,
> +-   "/", type->subtype, "\n", NULL));
> ++   "/", type->subtype, "\n", nullptr));
> + }
> + 
> + /* Write all the collected namespace rules to 'XMLnamespaces' */
> +@@ -2038,7 +2038,7 @@ static void write_subclass(gpointer key,
> + 
> + for (l = list; l; l = l->next)
> + {
> +- line = g_strconcat (static_cast<const gchar *>(key), " ", l->data, "\n", 
> NULL);
> ++ line = g_strconcat (static_cast<const gchar *>(key), " ", l->data, "\n", 
> nullptr);
> + fwrite(line, 1, strlen(line), stream);
> + g_free (line);
> + }
> +@@ -2061,7 +2061,7 @@ static void add_alias(gpointer key, gpoi
> + 
> + g_ptr_array_add(lines, g_strconcat(alias, " ", type->media,
> +   "/", type->subtype, "\n", 
> +-   NULL));
> ++   nullptr));
> + }
> + 
> + /* Write all the collected aliases */
> +@@ -2092,7 +2092,7 @@ static void add_type(gpointer key, gpoin
> + {
> + GPtrArray *lines = (GPtrArray *) data;
> + 
> +- g_ptr_array_add(lines, g_strconcat((char *)key, "\n", NULL));
> ++ g_ptr_array_add(lines, g_strconcat((char *)key, "\n", nullptr));
> + }
> + 
> + /* Write all the collected types */
> +@@ -2127,7 +2127,7 @@ static void write_one_icon(gpointer key,
> + FILE *stream = (FILE *)data;
> + char *line;
> + 
> +- line = g_strconcat (mimetype, ":", iconname, "\n", NULL);
> ++ line = g_strconcat (mimetype, ":", iconname, "\n", nullptr);
> + fwrite(line, 1, strlen(line), stream);
> + g_free (line);
> + }
> +@@ -2168,7 +2168,7 @@ static void check_in_path_xdg_data(const
> + dirs[n] = g_strdup(env);
> + else
> + dirs[n] = g_build_filename(g_get_home_dir(), ".local",
> +- "share", NULL);
> ++ "share", nullptr);
> + n++;
> + 
> + for (i = 0; i < n; i++)
> +@@ -3588,7 +3588,7 @@ newest_mtime(const char *packagedir)
> + while ((name = g_dir_read_name(dir))) {
> + char *path;
> + 
> +- path = g_build_filename(packagedir, name, NULL);
> ++ path = g_build_filename(packagedir, name, nullptr);
> + retval = g_stat(path, &statbuf);
> + g_free(path);
> + if (retval < 0)
> +@@ -3609,7 +3609,7 @@ is_cache_up_to_date (const char *mimedir
> + char *mimeversion;
> + int retval;
> + 
> +- mimeversion = g_build_filename(mimedir, "/version", NULL);
> ++ mimeversion = g_build_filename(mimedir, "/version", nullptr);
> + retval = g_stat(mimeversion, &version_stat);
> + g_free(mimeversion);
> + if (retval < 0)
> +@@ -3694,7 +3694,7 @@ int main(int argc, char **argv)
> + }
> + }
> + 
> +- package_dir = g_strconcat(mime_dir, "/packages", NULL);
> ++ package_dir = g_strconcat(mime_dir, "/packages", nullptr);
> + 
> + if (!fs::exists(mime_dir) && !fs::is_directory(fs::status(mime_dir)))
> + {
> +@@ -3747,7 +3747,7 @@ int main(int argc, char **argv)
> + 
> + g_hash_table_foreach(globs_hash, collect_glob2, &glob_list);
> + glob_list = g_list_sort(glob_list, (GCompareFunc)compare_glob_by_weight);
> +- globs_path = g_strconcat(mime_dir, "/globs.new", NULL);
> ++ globs_path = g_strconcat(mime_dir, "/globs.new", nullptr);
> + globs = fopen_gerror(globs_path, error);
> + if (!globs)
> + goto out;
> +@@ -3761,7 +3761,7 @@ int main(int argc, char **argv)
> + goto out;
> + g_free(globs_path);
> + 
> +- globs_path = g_strconcat(mime_dir, "/globs2.new", NULL);
> ++ globs_path = g_strconcat(mime_dir, "/globs2.new", nullptr);
> + globs = fopen_gerror(globs_path, error);
> + if (!globs)
> + goto out;
> +@@ -3782,7 +3782,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *magic_path;
> + int i;
> +- magic_path = g_strconcat(mime_dir, "/magic.new", NULL);
> ++ magic_path = g_strconcat(mime_dir, "/magic.new", nullptr);
> + stream = fopen_gerror(magic_path, error);
> + if (!stream)
> + goto out;
> +@@ -3807,7 +3807,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *ns_path;
> + 
> +- ns_path = g_strconcat(mime_dir, "/XMLnamespaces.new", NULL);
> ++ ns_path = g_strconcat(mime_dir, "/XMLnamespaces.new", nullptr);
> + stream = fopen_gerror(ns_path, error);
> + if (!stream)
> + goto out;
> +@@ -3823,7 +3823,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + 
> +- path = g_strconcat(mime_dir, "/subclasses.new", NULL);
> ++ path = g_strconcat(mime_dir, "/subclasses.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> +@@ -3839,7 +3839,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + 
> +- path = g_strconcat(mime_dir, "/aliases.new", NULL);
> ++ path = g_strconcat(mime_dir, "/aliases.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> +@@ -3855,7 +3855,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + 
> +- path = g_strconcat(mime_dir, "/types.new", NULL);
> ++ path = g_strconcat(mime_dir, "/types.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> +@@ -3871,7 +3871,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *icon_path;
> + 
> +- icon_path = g_strconcat(mime_dir, "/generic-icons.new", NULL);
> ++ icon_path = g_strconcat(mime_dir, "/generic-icons.new", nullptr);
> + stream = fopen_gerror(icon_path, error);
> + if (!stream)
> + goto out;
> +@@ -3887,7 +3887,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *icon_path;
> + 
> +- icon_path = g_strconcat(mime_dir, "/icons.new", NULL);
> ++ icon_path = g_strconcat(mime_dir, "/icons.new", nullptr);
> + stream = fopen_gerror(icon_path, error);
> + if (!stream)
> + goto out;
> +@@ -3903,7 +3903,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + int i;
> +- path = g_strconcat(mime_dir, "/treemagic.new", NULL);
> ++ path = g_strconcat(mime_dir, "/treemagic.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> +@@ -3928,7 +3928,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + 
> +- path = g_strconcat(mime_dir, "/mime.cache.new", NULL);
> ++ path = g_strconcat(mime_dir, "/mime.cache.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> +@@ -3944,7 +3944,7 @@ int main(int argc, char **argv)
> + FILE *stream;
> + char *path;
> + 
> +- path = g_strconcat(mime_dir, "/version.new", NULL);
> ++ path = g_strconcat(mime_dir, "/version.new", nullptr);
> + stream = fopen_gerror(path, error);
> + if (!stream)
> + goto out;
> diff --git 
> a/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-string-literal-concatenation.patch
>  
> b/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-string-literal-concatenation.patch
> new file mode 100644
> index 00000000000..7825c39312b
> --- /dev/null
> +++ 
> b/meta/recipes-support/shared-mime-info/shared-mime-info/0001-Fix-string-literal-concatenation.patch
> @@ -0,0 +1,39 @@
> +From ccf704a606625bc62e70dbe815b309c22a0bda05 Mon Sep 17 00:00:00 2001
> +From: Tobias Mayer <to...@fastmail.fm>
> +Date: Sun, 8 Oct 2023 00:11:49 +0200
> +Subject: [PATCH] Fix string literal concatenation
> +
> +Clang is not able to disambiguate between multiple string literatals
> +and C++11 user defined literals. Spaces help.
> +
> +Upstream-Status: Backport 
> [https://gitlab.freedesktop.org/xdg/shared-mime-info/-/commit/12a3a6b1141c704fc594379af1808bb9008d588c]
> +Signed-off-by: Khem Raj <raj.k...@gmail.com>
> +---
> + src/update-mime-database.cpp | 4 ++--
> + 1 file changed, 2 insertions(+), 2 deletions(-)
> +
> +diff --git a/src/update-mime-database.cpp b/src/update-mime-database.cpp
> +index 733ba06..29d82a9 100644
> +--- a/src/update-mime-database.cpp
> ++++ b/src/update-mime-database.cpp
> +@@ -2158,7 +2158,7 @@ static void check_in_path_xdg_data(const char 
> *mime_path)
> + 
> + env = getenv("XDG_DATA_DIRS");
> + if (!env)
> +- env = "/usr/local/share/"PATH_SEPARATOR"/usr/share/";
> ++ env = "/usr/local/share/" PATH_SEPARATOR "/usr/share/";
> + dirs = g_strsplit(env, PATH_SEPARATOR, 0);
> + g_return_if_fail(dirs != NULL);
> + for (n = 0; dirs[n]; n++)
> +@@ -2170,7 +2170,7 @@ static void check_in_path_xdg_data(const char 
> *mime_path)
> + dirs[n] = g_build_filename(g_get_home_dir(), ".local",
> + "share", NULL);
> + n++;
> +- 
> ++
> + for (i = 0; i < n; i++)
> + {
> + if (stat(dirs[i], &dir_info) == 0 &&
> +-- 
> +2.42.0
> +
> diff --git a/meta/recipes-support/shared-mime-info/shared-mime-info_git.bb 
> b/meta/recipes-support/shared-mime-info/shared-mime-info_git.bb
> index 81a9259d7b5..cae00643332 100644
> --- a/meta/recipes-support/shared-mime-info/shared-mime-info_git.bb
> +++ b/meta/recipes-support/shared-mime-info/shared-mime-info_git.bb
> @@ -8,7 +8,10 @@ LIC_FILES_CHKSUM = 
> "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263"
> 
> DEPENDS = "libxml2 itstool-native glib-2.0 shared-mime-info-native 
> xmlto-native"
> 
> -SRC_URI = 
> "git://gitlab.freedesktop.org/xdg/shared-mime-info.git;protocol=https;branch=master"
> +SRC_URI = 
> "git://gitlab.freedesktop.org/xdg/shared-mime-info.git;protocol=https;branch=master
>  \
> +           file://0001-Fix-string-literal-concatenation.patch \
> +           file://0001-Fix-literal-as-per-c-11.patch \
> +           "
> SRCREV = "8e80a317f5c61a7f410330abea441e0b0b9280b5"
> PV = "2.3"
> S = "${WORKDIR}/git"
> -- 
> 2.42.0
> 
> 
> 
> 

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