compiler: add 'force_align_arg_pointer' function attribute

docs/markdown/Reference-tables.md

@@ -198,49 +198,50 @@ These values are supported using the GCC style `__attribute__` annotations,
 which are supported by GCC, Clang, and other compilers.
 
 
-| Name                 |
-|----------------------|
-| alias                |
-| aligned              |
-| alloc_size           |
-| always_inline        |
-| artificial           |
-| cold                 |
-| const                |
-| constructor          |
-| constructor_priority |
-| deprecated           |
-| destructor           |
-| error                |
-| externally_visible   |
-| fallthrough          |
-| flatten              |
-| format               |
-| format_arg           |
-| gnu_inline           |
-| hot                  |
-| ifunc                |
-| malloc               |
-| noclone              |
-| noinline             |
-| nonnull              |
-| noreturn             |
-| nothrow              |
-| optimize             |
-| packed               |
-| pure                 |
-| returns_nonnull      |
-| unused               |
-| used                 |
-| visibility*          |
-| visibility:default†  |
-| visibility:hidden†   |
-| visibility:internal† |
-| visibility:protected†|
-| warning              |
-| warn_unused_result   |
-| weak                 |
-| weakreaf             |
+| Name                     |
+|--------------------------|
+| alias                    |
+| aligned                  |
+| alloc_size               |
+| always_inline            |
+| artificial               |
+| cold                     |
+| const                    |
+| constructor              |
+| constructor_priority     |
+| deprecated               |
+| destructor               |
+| error                    |
+| externally_visible       |
+| fallthrough              |
+| flatten                  |
+| format                   |
+| format_arg               |
+| force_align_arg_pointer³ |
+| gnu_inline               |
+| hot                      |
+| ifunc                    |
+| malloc                   |
+| noclone                  |
+| noinline                 |
+| nonnull                  |
+| noreturn                 |
+| nothrow                  |
+| optimize                 |
+| packed                   |
+| pure                     |
+| returns_nonnull          |
+| unused                   |
+| used                     |
+| visibility*              |
+| visibility:default†      |
+| visibility:hidden†       |
+| visibility:internal†     |
+| visibility:protected†    |
+| warning                  |
+| warn_unused_result       |
+| weak                     |
+| weakreaf                 |
 
 \* *Changed in 0.52.0* the "visibility" target no longer includes
 "protected", which is not present in Apple's clang.
@@ -248,6 +249,8 @@ which are supported by GCC, Clang, and other compilers.
 † *New in 0.52.0* These split visibility attributes are preferred to the plain
 "visibility" as they provide narrower checks.
 
+³ *New in 0.55.0*
+
 ### MSVC __declspec
 
 These values are supported using the MSVC style `__declspec` annotation,

mesonbuild/compilers/c_function_attributes.py

@@ -56,6 +56,8 @@ C_FUNC_ATTRIBUTES = {
         'int foo(const char * p, ...) __attribute__((format(printf, 1, 2)));',
     'format_arg':
         'char * foo(const char * p) __attribute__((format_arg(1)));',
+    'force_align_arg_pointer':
+        '__attribute__((force_align_arg_pointer)) int foo(void) { return 0; }',
     'gnu_inline':
         'inline __attribute__((gnu_inline)) int foo(void) { return 0; }',
     'hot':