Adjust Makefile for LLVM trunk (19) as of 2024-06-20 (#509)

llvm/llvm-project@41c6e43

Makefile

@@ -871,6 +871,7 @@ check-symbols: startup_files libc
  @# TODO: Filter out __FLT128_* that are new to clang 18.
  @# TODO: Filter out __MEMORY_SCOPE_* that are new to clang 18.
  @# TODO: Filter out __GCC_(CON|DE)STRUCTIVE_SIZE that are new to clang 19.
+ @# TODO: Filter out __STDC_EMBED_* that are new to clang 19.
  @# TODO: clang defined __FLT_EVAL_METHOD__ until clang 15, so we force-undefine it
  @# for older versions.
  @# TODO: Undefine __wasm_mutable_globals__ and __wasm_sign_ext__, that are new to
@@ -910,6 +911,7 @@ check-symbols: startup_files libc
  | grep -v '^#define __FLT128_' \
  | grep -v '^#define __MEMORY_SCOPE_' \
  | grep -v '^#define __GCC_\(CON\|DE\)STRUCTIVE_SIZE' \
+ | grep -v '^#define __STDC_EMBED_' \
  | grep -v '^#define NDEBUG' \
  | grep -v '^#define __OPTIMIZE__' \
  | grep -v '^#define assert' \