环境描述：：我使用的是RAD Studio 10.2.3 Tokyo，已安装所有修补程序，XCode 9.4.1，macOS High Sierra 10.13.6，iOS SDK 11.4，PAServer 10.3.1.10。 / p>
问题：：当我尝试为32位iOS编译空白应用程序时，该应用程序成功运行，并且该应用程序在我的设备上运行。但是，如果我包含- (void)processError:(NSError **) error {
NSError *unzippingError = nil; // error value which will be assigned inside `@autoreleasepool` block
NSError *err = nil; // it will hold the copy of error outside block
@autoreleasepool {
unzippingError = [NSError errorWithDomain:@"Domain" code:-1
userInfo:@{NSLocalizedDescriptionKey:@"Error message"}];
//copy the error in another variable to keep reference after @autoreleasepool block
err = [unzippingError copy];
}
if (error) {
* error = err;
}
}
，则在编译期间会出现以下错误：
<cmath>我正在搜索有关内容，发现了这一点：
https://forums.developer.apple.com/thread/87814
这是相同的错误，这是由于“如果您将isssroot和isystem结合使用”
以同样的方式，我在SO中找到了一个相关主题：
Missing/wrong headers iOS 11.3 SDK
我想知道，如何解决此问题？建议的答案是不要同时使用 isysroot和isystem ，而是在编译过程中由IDE自动生成命令选项。因此，如果您有解决此问题的修复程序或解决方法，请告诉我。
最小且可验证的代码：只需在C ++ Builder中创建一个空白应用程序，并将[bcciosarm Error] cmath(313): no member named 'signbit' in the global namespace
[bcciosarm Error] cmath(314): no member named 'fpclassify' in the global namespace
[bcciosarm Error] cmath(315): no member named 'isfinite' in the global namespace
[bcciosarm Error] cmath(316): no member named 'isinf' in the global namespace
[bcciosarm Error] cmath(317): no member named 'isnan' in the global namespace
[bcciosarm Error] cmath(318): no member named 'isnormal' in the global namespace
[bcciosarm Error] cmath(319): no member named 'isgreater' in the global namespace
[bcciosarm Error] cmath(320): no member named 'isgreaterequal' in the global namespace
[bcciosarm Error] cmath(321): no member named 'isless' in the global namespace
[bcciosarm Error] cmath(322): no member named 'islessequal' in the global namespace
[bcciosarm Error] cmath(323): no member named 'islessgreater' in the global namespace
[bcciosarm Error] cmath(324): no member named 'isunordered' in the global namespace
[bcciosarm Error] cmath(325): no member named 'isunordered' in the global namespace
标头包含在<cmath>中即可。