[openwrt/openwrt] Extend checks on build prerequisites for building OpenWRT core

[LEDE Commits]

zorun pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/567ad2d434a464f80c278800050fb3a9b9c49c9a

commit 567ad2d434a464f80c278800050fb3a9b9c49c9a
Author: Bas Mevissen <abuse at basmevissen.nl>
AuthorDate: Tue Apr 20 01:08:19 2021 +0200

    Extend checks on build prerequisites for building OpenWRT core
    
    OpenWRT requires a number of Perl modules to be installed. It wasn't checking on all of them.
    This patch adds checks for Perl FindBin, File::Copy, File::Compare and Thread::Queue modules.
    
    Failing to install these, will have the build break at some point. By adding these to the
    prereq-build.mk script, they are checked on forehand.
    
    Tested on a Fedora 33 and 34 (beta) that was freshly installed. Fedora appears to
    break up Perl modules into small packages that need to be installed for the build to succeed.
    
    Signed-off-by: Bas Mevissen <abuse at basmevissen.nl>
    (cherry picked from commit f68c9474acf9a65b5a9538db8e45c173462487e3)
---
 include/prereq-build.mk | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 86c22f7c95..cb3dcc51e3 100644
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -65,11 +65,22 @@ $(eval $(call TestHostCommand,perl-data-dumper, \
 	Please install the Perl Data::Dumper module, \
 	perl -MData::Dumper -e 1))
 
+$(eval $(call TestHostCommand,perl-findbin, \
+	Please install the Perl FindBin module, \
+	perl -MFindBin -e 1))
+
+$(eval $(call TestHostCommand,perl-file-copy, \
+	Please install the Perl File::Copy module, \
+	perl -MFile::Copy -e 1))
+
+$(eval $(call TestHostCommand,perl-file-compare, \
+	Please install the Perl File::Compare module, \
+	perl -MFile::Compare -e 1))
+
 $(eval $(call TestHostCommand,perl-thread-queue, \
 	Please install the Perl Thread::Queue module, \
 	perl -MThread::Queue -e 1))
 
-
 $(eval $(call SetupHostCommand,tar,Please install GNU 'tar', \
 	gtar --version 2>&1 | grep GNU, \
 	gnutar --version 2>&1 | grep GNU, \