[游戏开发]opengl glGetAttribLocation返回-1

glGetAttribLocation返回-1，检查着色器是否编译成功，若编译不成功，打印原因

static int loadShader(int shaderType, const char* code){
    int shader = glCreateShader(shaderType);
    glShaderSource(shader, 1, &code, 0);
    glCompileShader(shader);

    // 获取着色器编译结果
    GLint compiled = 0;
    glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);

    // 若编译失败，获取编译日志
    if (!compiled)
    {
        // 获取编译日志的长度
        GLint infoLen = 0;
        glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
        if (infoLen)
        {
            // 获取编译日志
            char* buf = (char*) malloc((size_t)infoLen);
            if (buf)
            {
                glGetShaderInfoLog(shader, infoLen, NULL, buf);
                LOGD("GLUtils::LoadShader Could not compile shader %d:\n%s\n", shaderType, buf);
                free(buf);
            }
            glDeleteShader(shader);
            shader = 0;
        }
    }
    return shader;
}