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@aparcar.org>
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		| @@ -25,7 +25,7 @@ the [Build System Setup](https://openwrt.org/docs/guide-developer/build-system/i | |||||||
| documentation. | 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 | subversion libz-dev libc-dev rsync | ||||||
| ``` | ``` | ||||||
|  |  | ||||||
|   | |||||||
| @@ -11,8 +11,8 @@ PKG_NAME:=Build dependency | |||||||
|  |  | ||||||
| # Required for the toolchain | # Required for the toolchain | ||||||
| $(eval $(call TestHostCommand,working-make, \ | $(eval $(call TestHostCommand,working-make, \ | ||||||
| 	Please install GNU make v3.82 or later. (This version has bugs), \ | 	Please install GNU make v4.1 or later., \ | ||||||
| 	$(MAKE) -v | grep -E 'Make (3\.8[2-9]|3\.9[0-9]|[4-9]\.)')) | 	$(MAKE) -v | grep -E 'Make (4\.[1-9]|[5-9]\.)')) | ||||||
|  |  | ||||||
| $(eval $(call TestHostCommand,case-sensitive-fs, \ | $(eval $(call TestHostCommand,case-sensitive-fs, \ | ||||||
| 	OpenWrt can only be built on a case-sensitive filesystem, \ | 	OpenWrt can only be built on a case-sensitive filesystem, \ | ||||||
|   | |||||||
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