Question

如何在bazel中包含特定于平台的标志？

假设我们有一个我们想要更改定义的跨平台库。

我们可以这样做：

<?php
session_start(); 

//your connection
$link = mysqli_connect("localhost","root","","dbname") or die("Couldn't make connection.");

//assuming $userID is user id of logged in user
$userID = $_SESSION['userid'];

//table of user who has logged in
$query_loguser = mysqli_query($link,"SELECT * FROM `user` WHERE userid = '$userID'");
$row_loguser = mysqli_fetch_assoc($query_loguser);

//department of logged in user
$department = $row_loguser['department'];

//users from same department as logged in user
$query_depuser = mysqli_query($link,"SELECT * FROM `user` WHERE `department` = '$department'");
$row_depuser = mysqli_fetch_assoc($query_depuser);


?>

<?php do { ?>

<?php echo $row_depuser['userName']; //list all users who are from same department as logged in user ?><br />

<?php } while ($row_depuser = mysqli_fetch_assoc($query_depuser));   ?>

另请注意，此概念可以应用于其他内容，例如包含，cflags，源代码，标题等。

Answer 1

有两种选择。首先是使用select function。使用select，您可以根据当前配置有条件地设置属性的值。

第二个选项是调整CROSSTOOL配置文件，根据工具链放置一个会发出不同标志的特定feature。然后，您可以在features属性中的cc_library中启用该功能。

第一个选项更简单，第二个选项更健壮，封装更多。

Bazel平台特定的C ++定义

1 个答案: