gcc编译标志 [英] gcc compilation flag
问题描述
任何人都可以解释为什么我们在gcc中使用-m标志?
我运行man gcc命令的结果是相当不清楚的任何机构可以解释我在汇编中的这个标志的作用吗?
如何使用-m标记正确的语法?
i需要它,因为我通过make命令运行了一个自动生成的makefile,但它显示了以下错误:
cc1:错误:无法识别的命令行选项-m
任何人都可以解释这是什么?
-m
总是跟着一个 machine-option
,这通常是机器相关的。常见的例子是 -m32
和 -m64
,用于在支持两者的体系结构上选择32位和64位版本。 p>
听起来您在某处有空或未初始化的makefile变量。
can any body explain me why we use -m flag in gcc ? I run man gcc command result are quite unclear can any body explain me role of this flag in compilation? how to use -m flag its proper syntax? i need it because i'm running a auto generated makefile through make command but it shows an error which is following: cc1: error: unrecognized command line option "-m" can anybody explain what is that ?
-m
is always followed by a machine-option
, which will typically be machine-dependent. Common examples are -m32
and -m64
for selecting 32 bit and 64 bit builds on architectures which support both.
It sounds like you have an empty or uninitialised makefile variable somewhere.
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