fix

Makefile

@@ -13,14 +13,14 @@ check-deps:
 ifeq (, $(shell which cargo))
 	$(error "The cargo command could not be found in your PATH, please install Rust: https://www.rust-lang.org/tools/install")
 endif
-ifndef LLVM_SYS_190_PREFIX
-	$(error Could not find a suitable LLVM 18 toolchain, please set LLVM_SYS_190_PREFIX env pointing to the LLVM 18 dir)
+ifndef LLVM_SYS_191_PREFIX
+	$(error Could not find a suitable LLVM 19 toolchain, please set LLVM_SYS_190_PREFIX env pointing to the LLVM 19 dir)
 endif
 ifndef MLIR_SYS_190_PREFIX
-	$(error Could not find a suitable LLVM 18 toolchain (mlir), please set MLIR_SYS_190_PREFIX env pointing to the LLVM 18 dir)
+	$(error Could not find a suitable LLVM 19 toolchain (mlir), please set MLIR_SYS_190_PREFIX env pointing to the LLVM 19 dir)
 endif
 ifndef TABLEGEN_190_PREFIX
-	$(error Could not find a suitable LLVM 18 toolchain (tablegen), please set TABLEGEN_190_PREFIX env pointing to the LLVM 18 dir)
+	$(error Could not find a suitable LLVM 19 toolchain (tablegen), please set TABLEGEN_190_PREFIX env pointing to the LLVM 19 dir)
 endif
 	@echo "[make] LLVM is correctly set at $(MLIR_SYS_190_PREFIX)."