[Buildroot] [git commit] Revert "support/dependencies: don't check for `which'"

[Yann E. MORIN]

commit: https://git.buildroot.net/buildroot/commit/?id=6cddc00399759296ab64fad4956380d89cd71609
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

This reverts commit a95c353a46247db036862ad839c095ca9ae4f690.

Switching to using 'command -v' instead of 'which', opened a can of
worms that is hard to fix in a timely manner:

  - recursive call to 'make' from a post-build, post-iamge script, fails
    because of a redefinition of HOSTCC_NOCCACHE (a bug on its own that
    needs a separate fix anyway) [0];

  - 'make' believeing it can call "simple" commands with execve() et al.
    instead of passing them through a shell via system(), and thus
    failing to find 'command' in the PATH [1].

[0] https://lore.kernel.org/buildroot/20211001175329.GA1973888@lbrmn-mmayer.ric.broadcom.net/T/#m95c17eb8374e4e3dd6eee700d397aa12cca0739e
[1] https://lore.kernel.org/buildroot/20211001180304.GV1504958@scaer/T/#m3a8f36bd76ec7d8e5038a6c8932bb6ffe23ea268

Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
---
 support/dependencies/dependencies.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index a3e0b3ecc4..c5dcb86231 100755
--- a/support/dependencies/dependencies.sh
+++ b/support/dependencies/dependencies.sh
@@ -65,6 +65,8 @@ check_prog_host()
 	fi
 }
 
+# Verify that which is installed
+check_prog_host "which"
 # Verify that sed is installed
 check_prog_host "sed"