internal/build:compile with c mode,when c file

runtime/internal/clite/bitcast/_cast/cast.c

@@ -6,8 +6,6 @@ typedef union
     long long ll;
 } castUnion;
 
-extern "C" { 
-
 double llgoToFloat64(long long v)
 {
     castUnion k;
@@ -35,5 +33,3 @@ int llgoFromFloat32(float v)
     k.f = v;
     return k.v;
 }
-
-}

runtime/internal/clite/bitcast/bitcast.go

@@ -19,7 +19,7 @@ package bitcast
 import _ "unsafe"
 
 const (
-	LLGoFiles   = "_cast/cast.cpp"
+	LLGoFiles   = "_cast/cast.c"
 	LLGoPackage = "link"
 )
 

runtime/internal/clite/debug/_wrap/debug.c

@@ -9,8 +9,6 @@
 #include <dlfcn.h>
 #include <libunwind.h>
 
-extern "C" {
-
 void *llgo_address() {
     return __builtin_return_address(0);
 }
@@ -40,6 +38,4 @@ void llgo_stacktrace(int skip, void *ctx, int (*fn)(void *ctx, void *pc, void *o
             }
         }
     }
-}
-
-}
+}

runtime/internal/clite/debug/debug.go

@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	LLGoFiles = "$(llvm-config --cflags): _wrap/debug.cpp"
+	LLGoFiles = "$(llvm-config --cflags): _wrap/debug.c"
 )
 
 type Info struct {

runtime/internal/clite/ffi/_wrap/libffi.c

@@ -1,9 +1,5 @@
 #include <ffi.h>
 
-extern "C" {
-
 void *llog_ffi_closure_alloc(void **code) {
     return ffi_closure_alloc(sizeof(ffi_closure), code);
 }
-
-}

runtime/internal/clite/ffi/ffi_other.go

@@ -10,7 +10,7 @@ import (
 
 const (
 	LLGoPackage = "link: $(pkg-config --libs libffi); -lffi"
-	LLGoFiles   = "$(pkg-config --cflags libffi): _wrap/libffi.cpp"
+	LLGoFiles   = "$(pkg-config --cflags libffi): _wrap/libffi.c"
 )
 
 /*

runtime/internal/clite/libuv/_wrap/libuv.c

@@ -1,9 +1,5 @@
 #include <uv.h>
 
-extern "C" {
-  
 int uv_tcp_get_io_watcher_fd (uv_tcp_t* handle) {
   return handle->io_watcher.fd;
-}
-
-}
+}

runtime/internal/clite/libuv/libuv.go

@@ -9,7 +9,7 @@ import (
 
 const (
 	LLGoPackage = "link: $(pkg-config --libs libuv); -luv"
-	LLGoFiles   = "$(pkg-config --cflags libuv): _wrap/libuv.cpp"
+	LLGoFiles   = "$(pkg-config --cflags libuv): _wrap/libuv.c"
 )
 
 // ----------------------------------------------

runtime/internal/clite/openssl/_wrap/openssl.c

@@ -1,9 +1,5 @@
 #include <openssl/crypto.h>
 
-extern "C" {
-
 void opensslFree(void *ptr) {
     OPENSSL_free(ptr);
 }
-
-}

runtime/internal/clite/openssl/openssl.go

@@ -25,7 +25,7 @@ import (
 // -----------------------------------------------------------------------------
 
 const (
-	LLGoFiles   = "$(pkg-config --cflags openssl): _wrap/openssl.cpp"
+	LLGoFiles   = "$(pkg-config --cflags openssl): _wrap/openssl.c"
 	LLGoPackage = "link: $(pkg-config --libs openssl); -lssl -lcrypto"
 )
 

runtime/internal/clite/os/_os/os.c

@@ -1,8 +1,6 @@
 #include <stdlib.h>
 #include <errno.h>
 
-extern "C" {
-
 int cliteClearenv()
 {
 	extern char **environ;
@@ -14,5 +12,3 @@ int cliteClearenv()
 }
 
 int cliteErrno() { return errno; }
-
-}

runtime/internal/clite/os/os_darwin.go

@@ -23,7 +23,7 @@ import (
 )
 
 const (
-	LLGoFiles   = "_os/os.cpp"
+	LLGoFiles   = "_os/os.c"
 	LLGoPackage = "link"
 )
 

runtime/internal/clite/os/os_other.go

@@ -25,7 +25,7 @@ import (
 )
 
 const (
-	LLGoFiles   = "_os/os.cpp"
+	LLGoFiles   = "_os/os.c"
 	LLGoPackage = "link"
 )