fix: CreateProcess 替代 system() 调 ld.lld，消除 shell 转义问题

src/driver/main.c

@@ -20,7 +20,9 @@
 static void get_exe_dir(char* buf, size_t size) {
 #ifdef _WIN32
     GetModuleFileNameA(NULL, buf, (DWORD)size);
-    char* last = strrchr(buf, '\\');
+    // 反斜杠 → 正斜杠（兼容 MSYS2 和 cmd.exe）
+    for (char* p = buf; *p; p++) if (*p == '\\') *p = '/';
+    char* last = strrchr(buf, '/');
     if (last) *last = '\0';
 #else
     buf[0] = '.'; buf[1] = '\0';
@@ -152,29 +154,61 @@ int main(int argc, char** argv) {
             return 1;
         }
 
-        // 链接：优先安装包自带的 ld.lld + MinGW 库，fallback clang/gcc
-        char cmd[2048];
+        // 链接：优先安装包自带的 ld.lld + MinGW 库，fallback gcc
         int ret = -1;
         char exe_dir[512];
         get_exe_dir(exe_dir, sizeof(exe_dir));
 
-        // 1) 优先: 安装包自带的 ld.lld + 自带 MinGW 库（完全自包含）
-        snprintf(cmd, sizeof(cmd),
-            "\"%s/ld.lld.exe\" -m i386pep "
-            "\"%s/mingw_lib/crt2.o\" \"%s/mingw_lib/crtbegin.o\" "
-            "\"%s\" "
-            "-L \"%s/mingw_lib\" "
-            "-lmingw32 -lmcfgthread -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt "
-            "-ladvapi32 -lshell32 -luser32 -lkernel32 -lntdll "
-            "\"%s/mingw_lib/crtend.o\" "
-            "-o \"%s\"",
-            exe_dir, exe_dir, exe_dir,
-            obj_path, exe_dir,
-            exe_dir, output);
-        ret = system(cmd);
+        // 1) 优先: 安装包自带的 ld.lld + MinGW 库（CreateProcess 避免 shell 转义）
+        {
+            char ld_path[512], crt2[512], crtbegin[512], crtend[512];
+            char lib_dir[512], out_path[512];
+            snprintf(ld_path, sizeof(ld_path), "%s/ld.lld.exe", exe_dir);
+            snprintf(crt2, sizeof(crt2), "%s/mingw_lib/crt2.o", exe_dir);
+            snprintf(crtbegin, sizeof(crtbegin), "%s/mingw_lib/crtbegin.o", exe_dir);
+            snprintf(crtend, sizeof(crtend), "%s/mingw_lib/crtend.o", exe_dir);
+            snprintf(lib_dir, sizeof(lib_dir), "-L%s/mingw_lib", exe_dir);
+            snprintf(out_path, sizeof(out_path), "-o%s", output);
+
+            const char* ld_args[] = {
+                ld_path, "-m", "i386pep",
+                crt2, crtbegin, obj_path,
+                lib_dir,
+                "-lmingw32", "-lmcfgthread", "-lgcc", "-lgcc_eh",
+                "-lmoldname", "-lmingwex", "-lmsvcrt",
+                "-ladvapi32", "-lshell32", "-luser32", "-lkernel32", "-lntdll",
+                crtend, out_path, NULL
+            };
+            int nargs = sizeof(ld_args) / sizeof(ld_args[0]) - 1;
+
+            // 拼成命令行（CreateProcess 需要）
+            char cmd_line[4096] = {0};
+            char* p = cmd_line;
+            for (int i = 0; i < nargs; i++) {
+                if (i > 0) *p++ = ' ';
+                // 路径含空格则加引号
+                bool has_space = strchr(ld_args[i], ' ') != NULL;
+                if (has_space) *p++ = '"';
+                p += strlen(strcpy(p, ld_args[i]));
+                if (has_space) *p++ = '"';
+            }
+
+            STARTUPINFOA si = { sizeof(si) };
+            PROCESS_INFORMATION pi = {0};
+            if (CreateProcessA(NULL, cmd_line, NULL, NULL, FALSE,
+                               CREATE_NO_WINDOW, NULL, NULL, &si, &pi)) {
+                WaitForSingleObject(pi.hProcess, INFINITE);
+                DWORD exit_code;
+                GetExitCodeProcess(pi.hProcess, &exit_code);
+                ret = (int)exit_code;
+                CloseHandle(pi.hProcess);
+                CloseHandle(pi.hThread);
+            }
+        }
 
         // 2) 最后 fallback: gcc（开发机有 MinGW 时）
         if (ret != 0) {
+            char cmd[1024];
             snprintf(cmd, sizeof(cmd),
                 "gcc \"%s\" -o \"%s\"",
                 obj_path, output);