Patch upb for clang-16 (#183)

bazel/patches/upb.patch

@@ -0,0 +1,29 @@
+diff --git a/bazel/build_defs.bzl b/bazel/build_defs.bzl
+index b5bc64f0..dc30a75f 100644
+--- a/bazel/build_defs.bzl
++++ b/bazel/build_defs.bzl
+@@ -38,7 +38,7 @@ _DEFAULT_CPPOPTS.extend([
+     "-Wno-long-long",
+ ])
+ _DEFAULT_COPTS.extend([
+-    "-std=c99",
++    "-std=c11",
+     "-pedantic",
+     "-Werror=pedantic",
+     "-Wall",
+diff --git a/upb/port_def.inc b/upb/port_def.inc
+index 92e4bf24..e355ace7 100644
+--- a/upb/port_def.inc
++++ b/upb/port_def.inc
+@@ -92,7 +92,11 @@
+ #define UPB_ALIGN_UP(size, align) (((size) + (align) - 1) / (align) * (align))
+ #define UPB_ALIGN_DOWN(size, align) ((size) / (align) * (align))
+ #define UPB_ALIGN_MALLOC(size) UPB_ALIGN_UP(size, UPB_MALLOC_ALIGN)
++#ifdef __clang__
++#define UPB_ALIGN_OF(type) _Alignof(type)
++#else
+ #define UPB_ALIGN_OF(type) offsetof (struct { char c; type member; }, member)
++#endif
+
+ /* Hints to the compiler about likely/unlikely branches. */
+ #if defined (__GNUC__) || defined(__clang__)

bazel/repositories.bzl

@@ -93,6 +93,10 @@ def _upb():
             "https://storage.googleapis.com/grpc-bazel-mirror/github.com/protocolbuffers/upb/archive/e4635f223e7d36dfbea3b722a4ca4807a7e882e2.tar.gz",
             "https://github.com/protocolbuffers/upb/archive/e4635f223e7d36dfbea3b722a4ca4807a7e882e2.tar.gz",
         ],
+        patch_args = ["-p1"],
+        patches = [
+            "@psi//bazel:patches/upb.patch",
+        ],
     )
 
 def _com_github_emptoolkit_emp_tool():