在C++应用程序中编译嵌入式spidermonkey javascript引擎
compiling an embedded spidermonkey javascript engine in C++ application
我使用1.8.5版本下载了SpiderMonkey源代码。然后,我通过执行以下命令成功构建了包含文件和静态库:
autoconf2.13
./configure
make
make install
现在我尝试使用命令g++编译以下代码
/* Include the JSAPI header file to get access to SpiderMonkey. */
#include "jsapi.h"
/* The class of the global object. */
static JSClass global_class = {
"global", JSCLASS_GLOBAL_FLAGS,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
JSCLASS_NO_OPTIONAL_MEMBERS
};
/* The error reporter callback. */
void reportError(JSContext *cx, const char *message, JSErrorReport *report)
{
fprintf(stderr, "%s:%u:%s'n",
report->filename ? report->filename : "<no filename='"filename'">",
(unsigned int) report->lineno,
message);
}
int main(int argc, const char *argv[])
{
/* JSAPI variables. */
JSRuntime *rt;
JSContext *cx;
JSObject *global;
/* Create a JS runtime. You always need at least one runtime per process. */
rt = JS_NewRuntime(8 * 1024 * 1024);
if (rt == NULL)
return 1;
/*
* Create a context. You always need a context per thread.
* Note that this program is not multi-threaded.
*/
cx = JS_NewContext(rt, 8192);
if (cx == NULL)
return 1;
JS_SetOptions(cx, JSOPTION_VAROBJFIX | JSOPTION_JIT | JSOPTION_METHODJIT);
JS_SetVersion(cx, JSVERSION_LATEST);
JS_SetErrorReporter(cx, reportError);
/*
* Create the global object in a new compartment.
* You always need a global object per context.
*/
global = JS_NewCompartmentAndGlobalObject(cx, &global_class, NULL);
if (global == NULL)
return 1;
/*
* Populate the global object with the standard JavaScript
* function and object classes, such as Object, Array, Date.
*/
if (!JS_InitStandardClasses(cx, global))
return 1;
/* Your application code here. This may include JSAPI calls
* to create your own custom JavaScript objects and to run scripts.
*
* The following example code creates a literal JavaScript script,
* evaluates it, and prints the result to stdout.
*
* Errors are conventionally saved in a JSBool variable named ok.
*/
const char *script = "'Hello ' + 'World!'";
jsval rval;
JSString *str;
JSBool ok;
const char *filename = "noname";
uintN lineno = 0;
ok = JS_EvaluateScript(cx, global, script, strlen(script),
filename, lineno, &rval);
if (rval == JS_NULL | rval == JS_FALSE)
return 1;
str = JS_ValueToString(cx, rval);
printf("%s'n", JS_EncodeString(cx, str));
/* End of your application code */
/* Clean things up and shut down SpiderMonkey. */
JS_DestroyContext(cx);
JS_DestroyRuntime(rt);
JS_ShutDown();
return 0;
}
我使用的命令
" g++ -Ihome/SpiderMonkey/js-1.8.5/js/src/dist/include
-Lhome/SpiderMonkey/js1.8.5/js/src/dist/bin -lmozjs185 helloworld.cpp -o helloworld "
错误是:
In function `main':
helloworld.cpp:(.text+0x6e): undefined reference to `JS_Init'
helloworld.cpp:(.text+0x94): undefined reference to `JS_NewContext'
helloworld.cpp:(.text+0xba): undefined reference to `JS_SetOptions'
helloworld.cpp:(.text+0xcb): undefined reference to `JS_SetVersion'
helloworld.cpp:(.text+0xdc): undefined reference to `JS_SetErrorReporter'
helloworld.cpp:(.text+0xf2): undefined reference to `JS_NewCompartmentAndGlobalObject'
helloworld.cpp:(.text+0x11a): undefined reference to `JS_InitStandardClasses'
helloworld.cpp:(.text+0x191): undefined reference to `JS_EvaluateScript'
helloworld.cpp:(.text+0x1c8): undefined reference to `JS_ValueToString'
helloworld.cpp:(.text+0x1df): undefined reference to `JS_EncodeString'
helloworld.cpp:(.text+0x1f3): undefined reference to `JS_DestroyContext'
helloworld.cpp:(.text+0x1ff): undefined reference to `JS_Finish'
helloworld.cpp:(.text+0x204): undefined reference to `JS_ShutDown'
/tmp/ccUU9may.o:(.data+0x10): undefined reference to `JS_PropertyStub'
/tmp/ccUU9may.o:(.data+0x18): undefined reference to `JS_PropertyStub'
/tmp/ccUU9may.o:(.data+0x20): undefined reference to `JS_PropertyStub'
/tmp/ccUU9may.o:(.data+0x28): undefined reference to `JS_StrictPropertyStub'
/tmp/ccUU9may.o:(.data+0x30): undefined reference to `JS_EnumerateStub'
/tmp/ccUU9may.o:(.data+0x38): undefined reference to `JS_ResolveStub'
/tmp/ccUU9may.o:(.data+0x40): undefined reference to `JS_ConvertStub'
/tmp/ccUU9may.o:(.data+0x48): undefined reference to `JS_FinalizeStub'
collect2: ld returned 1 exit status
我解决了这个问题,所以我想为其他面临同样问题的人发布答案。在编译hellowold.cpp时,必须在命令中使用的库(如)之前编写helloworld
g++ hellowrold.cpp -o helloworld -I/your_path_of_include_folder/include/ -L/your_path_of_shared_libraries/lib -lmozjs185
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