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build: add which command to build requirements

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`which` utility is not shipped by default for example on recent Arch
Linux and then any steps relying on its presence fails, like for example
following Python3 prereq build check:

 $ python3 --version
 Python 3.9.1

 $ make
 /bin/sh: line 1: which: command not found
 ...
 Checking 'python3'... failed.

So make `which` utility host build requirement.

References: PR#3820 FS#3525
Signed-off-by: Petr Štetiar <ynezz@true.cz>
This commit is contained in:
Petr Štetiar 2021-03-03 19:48:55 +01:00
parent 1f5e722486
commit 13069b1a1d
2 changed files with 4 additions and 1 deletions
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2
README.md
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@ -26,7 +26,7 @@ documentation.
```
gcc-6+ binutils bzip2 flex python3 perl make4.1+ find grep diff unzip gawk getopt
subversion libz-dev libc-dev rsync
subversion libz-dev libc-dev rsync which
```
### Quickstart

3
include/prereq-build.mk
View File

@ -166,6 +166,9 @@ $(eval $(call SetupHostCommand,file,Please install the 'file' package, \
$(eval $(call SetupHostCommand,rsync,Please install 'rsync', \
rsync --version </dev/null))
$(eval $(call SetupHostCommand,which,Please install 'which', \
which which | grep which))
$(STAGING_DIR_HOST)/bin/mkhash: $(SCRIPT_DIR)/mkhash.c
mkdir -p $(dir $@)
$(CC) -O2 -I$(TOPDIR)/tools/include -o $@ $<