FS#3809 - v21.02.0-rc1 reports false missing "which" on fedora 34

[openwrt-bot]

damnms:

i use fedora 34, installed the required software and “which” is available on the command line

[oli@lucy openwrt]$ which which | grep which
which ()

eval ${which_declare} ) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"
but when i run “./scripts/feeds update -a” i get:
hecking ‘perl’... ok.
Checking ‘python2-cleanup’... ok.
Checking ‘python’... ok.
Checking ‘python3’... ok.
Checking ‘git’... ok.
Checking ‘file’... ok.
Checking ‘rsync’... ok.
Checking ‘which’... failed.
Checking ‘ldconfig-stub’... ok.

Build dependency: Please install ‘which’

Prerequisite check failed. Use FORCE=1 to override.
gmake: *** [/home/oli/openwrt/include/toplevel.mk:180: staging_dir/host/.prereq-build] Fehler 1

[oli@lucy ~]$ rpm -qa | grep which
which-2.21-26.fc34.x86_64

corrected the meta infos of this ticket and copied it from https://bugs.openwrt.org/index.php?do=details&task_id=3805

[openwrt-bot]

plntyk:

replicated it on my Fedora 34 Install

Hack: changing which to /usr/bin/which fixes it ( changes in include/prereq.mk)

seems to be a case of shell builtin vs. external program ?

[openwrt-bot]

plntyk:

further investigated this

Fedora 30: OK
Fedora 31: OK
Fedora 32: OK
Fedora 33: OK
Fedora 34-LiveCD: OK
Fedora 34 (installed & updated: FAIL

Package
which 2.24-24 is ok (vanilla live iso: Fedora-Workstation-Live-x86_64-34-1.2.iso=
which 2.24-26 fails (updating live iso , open new bash to enable new environment then fails)

fails (which 2.24-26):
env |grep -i which
which_declare=declare -f
BASH_FUNC_which%%=() { ( alias;
eval ${which_declare} ) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"

works (2.24-24)
env |grep -i which
BASH_FUNC_which%%=() { ( alias;
eval ${_declare} ) | /usr/bin/which --tty-only --read-alias --read-functions --show-tilde --show-dot "$@"

maybe file a bug against Fedora ? (bugzilla.redhat.com)

[openwrt-bot]

fda:

Quickfix: Run "unset which" before "make" or put it in .profile file