英文:
what is the rule file matching of command `rm` in makefile?
问题
I was required to run a makefile on mint, I input the option 'clean' about:
clean:
I type this order in shells rm -f test_{a,b}.o, and it do delete the file test_a.o and test_b.o, but it doesn't work on Mint OS, but it work on CentOS7.
I want to find the reason for this problem. now I use rm -f test_a.o test_b.o instead temporarily.
英文:
I was required to run a makefile on mint, I input the option 'clean' about:
clean:
<tab> rm -f test_{a,b}.o
I type this order in shells rm -f test_{a,b}.o, and it do delete the file test_a.o and test_b.o, but it doesn't work on Mint OS, but it work on CentOS7.
I want to find the reason for this problem. now I use rm -f test_a.o test_b.o instead temporarily.
答案1
得分: 1
这取决于shell：大括号扩展在Bash中受支持，但例如在dash中不受支持，dash是Ubuntu上的默认/bin/sh shell；而/bin/sh是Makefile中的默认shell。您可以通过以下方式在Makefile 中切换所使用的shell：
SHELL = /bin/bash
英文:
This depends on the shell: brace expansion is supported by Bash, but for example not by dash, which is the default /bin/sh shell on Ubuntu; and /bin/sh is the default shell in Makefiles. You could switch the shell used in the Makefile with
SHELL = /bin/bash
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