fix linking issue

ggml/src/ggml-cpu/CMakeLists.txt

@@ -441,9 +441,9 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
     elseif (GGML_SYSTEM_ARCH STREQUAL "riscv64")
         message(STATUS "riscv64 detected")
         list(APPEND GGML_CPU_SOURCES
+            ggml-cpu/arch/riscv/dispatch.cpp
             ggml-cpu/arch/riscv/quants.c
             ggml-cpu/arch/riscv/repack.cpp
-            ggml-cpu/arch/riscv/dispatch.cpp
             )
         if (GGML_CPU_RISCV64_SPACEMIT)
             target_compile_definitions(${GGML_CPU_NAME} PRIVATE GGML_USE_CPU_RISCV64_SPACEMIT ${RISCV64_SPACEMIT_IME_SPEC})

ggml/src/ggml-cpu/arch/riscv/dispatch.cpp

@@ -4,7 +4,10 @@
 
 #include "ggml-cpu.h"
 #include "quants.h"
+
+extern "C" {
 #include "kernels.inc"
+}
 
 #if defined(__riscv_v)