[openwrt/openwrt] build/prereq: require make 4.1 or later

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/6dba010157f2ac6485bb3dee6a5ed4450fb09463

commit 6dba010157f2ac6485bb3dee6a5ed4450fb09463
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Sat Dec 12 20:57:21 2020 -1000

    build/prereq: require make 4.1 or later
    
    FS#2086 "IS_TTY in the makefile is broken" reports flawed detection of
    stdout piping to a file. The issue describes how e.g. terminal color
    codes and up in log files if running make like `make > log.txt`.
    
    The proposed solution uses the make variable "MAKE_TERMOUT", which was
    introduced in make 4.1. All major distributions seem to updated to 4.1
    or later, so this ideally dosen't break anything.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 README.md               | 2 +-
 include/prereq-build.mk | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 21acbf4b80..b30819205b 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ the [Build System Setup](https://openwrt.org/docs/guide-developer/build-system/i
 documentation.
 
 ```
-gcc binutils bzip2 flex python3 perl make find grep diff unzip gawk getopt
+gcc binutils bzip2 flex python3 perl make4.1+ find grep diff unzip gawk getopt
 subversion libz-dev libc-dev rsync
 ```
 
diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 6dce11cba2..f88e853b52 100644
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -11,8 +11,8 @@ PKG_NAME:=Build dependency
 
 # Required for the toolchain
 $(eval $(call TestHostCommand,working-make, \
-	Please install GNU make v3.82 or later. (This version has bugs), \
-	$(MAKE) -v | grep -E 'Make (3\.8[2-9]|3\.9[0-9]|[4-9]\.)'))
+	Please install GNU make v4.1 or later., \
+	$(MAKE) -v | grep -E 'Make (4\.[1-9]|[5-9]\.)'))
 
 $(eval $(call TestHostCommand,case-sensitive-fs, \
 	OpenWrt can only be built on a case-sensitive filesystem, \