什么是前导"@"?在makefile的配方 [英] What is the leading "@" at the recipe of a makefile

问题描述

在由eclipse生成的makefile中，我看到以下规则:

In a makefile that is generated by eclipse, I see the following rules:

./Cores/$(TARGET).core.3.srec : ../$(TARGET).core.3/Debug/$(TARGET).core.3.elf
        @mkdir -p ./Cores/
        @e-objcopy --srec-forceS3 --output-target srec "$<" "$@".temp
        @echo Creating srec file for CoreID\<0x826\>
        @head --lines=1 "$@".temp  | sed 's/0000/0826/' > "$@"
        @tail --lines=+2 "$@".temp >> "$@"

在食谱行开头的" @ "的作用是什么?

What is the purpose of the "@" at the beginning of the recipe lines?

通读GNU Make用户手册时，找不到使用@的引用.然后，我假设它实际上是按原样转移到Shell的.

Reading through the GNU Make user's manual I could not find a reference to this use of @. I then assumed that it is actually transferred as-is to the shell.

因此，阅读BASH手册后，与设置相关的唯一用途是设置extglob选项时的命令替换.但是，在命令行中尝试此操作会给我一个错误.

So, reading the BASH manual, the only place I could relate to this use is in command substitution when the extglob option is set. However, trying this in the command line gave me an error.

推荐答案

@前缀使make静默运行命令.参见 GNU制作手册的本部分.

The @ prefix causes make to run the command silently. See this section of the GNU make manual.

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