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Editorial Team
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Asked: 2026-05-20T00:23:08+00:00

This is the install part of my Makefile: install: for e in $(EXEC); do

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This is the install part of my Makefile:

install:
    for e in $(EXEC); do \
        sudo cp --remove-destination ${CURDIR}/$$e /usr/local/bin; done
    sudo cp ${CURDIR}/bin/stage2.d /etc/bash_completion.d/stage2
    . /etc/bash_completion

Where “stage2” is the name of my executable.

The last line is what provides the issue. After adding a file into bash_completion.d directory I want to source the bash_completion. But calling source or . yields:

. /etc/bash_completion
/etc/bash_completion: 32: [[: not found
/etc/bash_completion: 38: [[: not found
/etc/bash_completion: 50: Bad substitution
make: *** [install] Error 2
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1 Answer

  1. Editorial Team

    Make uses /bin/sh by default. you have to force it to use bash since [[ is not supported by normal sh.

    gnu make lets you set SHELL variable [in the makefile] to force it to use bash. So you would need to add a line

    SHELL=/bin/bash

    at the top of your makefile

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