I have a simple Makefile that just contains this one target. It looks like this:
SHELL:=/bin/bash
clean:
rm !(*.tex|Makefile|*.pdf)
When I run this command in bash it works fine, i.e. it gives no errors and it removes the desired files. However when I run make clean
it gives the following errors:
$ make clean
rm !(*.tex|Makefile|*.pdf)
/bin/bash: -c: line 0: syntax error near unexpected token `('
/bin/bash: -c: line 0: `rm !(*.tex|Makefile|*.pdf)'
make: *** [clean] Error 1
Has anybody got an idea what I'm doing wrong? Thanks.
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