Enable the semantic version mechanism for WAMR (#1374)

Use the semantic versioning (https://semver.org) to replace the current date
versioning system, which is more general and is requested by some developers,
e.g. issue #1357.

There are three parts in the new version string:
- major. Any incompatible modification on ABIs and APIs will lead to an increment
  in the value of major, which mainly includes: AOT calling conventions, AOT file
  format, wasm_export.h, wasm_c_api.h, and so on.
- minor. It represents new features, including MVP/POST-MVP features, libraries,
  WAMR private ones, and so one.
- patch. It represents patches.

The new version will start from 1.0.0. Update the help info and version showing for
iwasm and wamrc.

product-mini/platforms/linux-sgx/enclave-sample/App/App.cpp

@@ -232,6 +232,7 @@ print_help()
     printf("                         for example:\n");
     printf("                           --addr-pool=1.2.3.4/15,2.3.4.5/16\n");
     printf("  --max-threads=n        Set maximum thread number per cluster, default is 4\n");
+    printf("  --version              Show version information\n");
     return 1;
 }
 /* clang-format on */
@@ -292,6 +293,7 @@ typedef enum EcallCmd {
     CMD_DESTROY_RUNTIME,      /* wasm_runtime_destroy() */
     CMD_SET_WASI_ARGS,        /* wasm_runtime_set_wasi_args() */
     CMD_SET_LOG_LEVEL,        /* bh_log_set_verbose_level() */
+    CMD_GET_VERSION,          /* wasm_runtime_get_version() */
 } EcallCmd;
 
 static void
@@ -580,6 +582,23 @@ set_wasi_args(void *wasm_module, const char **dir_list, uint32_t dir_list_size,
     return (bool)ecall_args[0];
 }
 
+static void
+get_version(uint64_t *major, uint64_t *minor, uint64_t *patch)
+{
+    uint64_t ecall_args[3] = { 0 };
+
+    if (SGX_SUCCESS
+        != ecall_handle_command(g_eid, CMD_GET_VERSION, (uint8_t *)ecall_args,
+                                sizeof(ecall_args))) {
+        printf("Call ecall_handle_command() failed.\n");
+        return;
+    }
+
+    *major = ecall_args[0];
+    *minor = ecall_args[1];
+    *patch = ecall_args[2];
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -700,6 +719,12 @@ main(int argc, char *argv[])
                 return print_help();
             max_thread_num = atoi(argv[0] + 14);
         }
+        else if (!strncmp(argv[0], "--version", 9)) {
+            uint64_t major = 0, minor = 0, patch = 0;
+            get_version(&major, &minor, &patch);
+            printf("iwasm %lu.%lu.%lu\n", major, minor, patch);
+            return 0;
+        }
         else
             return print_help();
     }

product-mini/platforms/linux-sgx/enclave-sample/Enclave/Enclave.cpp

@@ -44,6 +44,7 @@ typedef enum EcallCmd {
     CMD_DESTROY_RUNTIME,      /* wasm_runtime_destroy() */
     CMD_SET_WASI_ARGS,        /* wasm_runtime_set_wasi_args() */
     CMD_SET_LOG_LEVEL,        /* bh_log_set_verbose_level() */
+    CMD_GET_VERSION,          /* wasm_runtime_get_version() */
 } EcallCmd;
 
 typedef struct EnclaveModule {
@@ -522,6 +523,18 @@ handle_cmd_set_wasi_args(uint64 *args, int32 argc)
 }
 #endif /* end of SGX_DISABLE_WASI */
 
+static void
+handle_cmd_get_version(uint64 *args, uint32 argc)
+{
+    uint32 major, minor, patch;
+    bh_assert(argc == 3);
+
+    wasm_runtime_get_version(&major, &minor, &patch);
+    args[0] = major;
+    args[1] = minor;
+    args[2] = patch;
+}
+
 void
 ecall_handle_command(unsigned cmd, unsigned char *cmd_buf,
                      unsigned cmd_buf_size)
@@ -569,6 +582,9 @@ ecall_handle_command(unsigned cmd, unsigned char *cmd_buf,
         case CMD_SET_LOG_LEVEL:
             handle_cmd_set_log_level(args, argc);
             break;
+        case CMD_GET_VERSION:
+            handle_cmd_get_version(args, argc);
+            break;
         default:
             LOG_ERROR("Unknown command %d\n", cmd);
             break;

product-mini/platforms/posix/main.c

@@ -68,6 +68,7 @@ print_help()
     printf("  -g=ip:port             Set the debug sever address, default is debug disabled\n");
     printf("                           if port is 0, then a random port will be used\n");
 #endif
+    printf("  --version              Show version information\n");
     return 1;
 }
 /* clang-format on */
@@ -461,6 +462,12 @@ main(int argc, char *argv[])
             ip_addr = argv[0] + 3;
         }
 #endif
+        else if (!strncmp(argv[0], "--version", 9)) {
+            uint32 major, minor, patch;
+            wasm_runtime_get_version(&major, &minor, &patch);
+            printf("iwasm %u.%u.%u\n", major, minor, patch);
+            return 0;
+        }
         else
             return print_help();
     }

product-mini/platforms/windows/main.c

@@ -50,6 +50,7 @@ print_help()
     printf("  -g=ip:port             Set the debug sever address, default is debug disabled\n");
     printf("                           if port is 0, then a random port will be used\n");
 #endif
+    printf("  --version              Show version information\n");
     return 1;
 }
 /* clang-format on */
@@ -339,6 +340,12 @@ main(int argc, char *argv[])
             ip_addr = argv[0] + 3;
         }
 #endif
+        else if (!strncmp(argv[0], "--version", 9)) {
+            uint32 major, minor, patch;
+            wasm_runtime_get_version(&major, &minor, &patch);
+            printf("iwasm %u.%u.%u\n", major, minor, patch);
+            return 0;
+        }
         else
             return print_help();
     }