>>> libinput 1.12.5 Downloading
--2019-01-10 15:24:02--  http://www.freedesktop.org/software/libinput/libinput-1.12.5.tar.xz
Resolving www.freedesktop.org (www.freedesktop.org)... 131.252.210.176, 2610:10:20:722:a800:ff:feda:470f
Connecting to www.freedesktop.org (www.freedesktop.org)|131.252.210.176|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://www.freedesktop.org/software/libinput/libinput-1.12.5.tar.xz [following]
--2019-01-10 15:25:07--  https://www.freedesktop.org/software/libinput/libinput-1.12.5.tar.xz
Connecting to www.freedesktop.org (www.freedesktop.org)|131.252.210.176|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 518612 (506K) [application/x-xz]
Saving to: '/home/buildroot/buildroot-test/instance-1/output/build/.libinput-1.12.5.tar.xz.aSbAeT/output'

     0K .......... .......... .......... .......... ..........  9%  157K 3s
    50K .......... .......... .......... .......... .......... 19%  327K 2s
   100K .......... .......... .......... .......... .......... 29% 7.33M 1s
   150K .......... .......... .......... .......... .......... 39% 8.99M 1s
   200K .......... .......... .......... .......... .......... 49%  331K 1s
   250K .......... .......... .......... .......... .......... 59% 8.62M 0s
   300K .......... .......... .......... .......... .......... 69% 11.2M 0s
   350K .......... .......... .......... .......... .......... 78% 9.52M 0s
   400K .......... .......... .......... .......... .......... 88%  364K 0s
   450K .......... .......... .......... .......... .......... 98% 10.3M 0s
   500K ......                                                100%  166M=0.8s

2019-01-10 15:25:11 (639 KB/s) - '/home/buildroot/buildroot-test/instance-1/output/build/.libinput-1.12.5.tar.xz.aSbAeT/output' saved [518612/518612]

libinput-1.12.5.tar.xz: OK (md5: 40dcc044443c9314537f605b6f30bf17)
libinput-1.12.5.tar.xz: OK (sha1: 7c0b75e8cf2f1747fb8ae69300acabd46f7a7f0d)
libinput-1.12.5.tar.xz: OK (sha256: 7d4b6831010ef3bf69df4b41170047fa4325edef8ff5d2d28e78281af0687123)
libinput-1.12.5.tar.xz: OK (sha512: 9365b91b3ac2c4ff0f9927913242afac7677979682dd7b541001b13d09d7982acd854f6d348101cfa4b0854c6a92b4c683f62593a97870e32ae3d607eaeae3ff)
>>> libinput 1.12.5 Extracting
xzcat /home/buildroot/buildroot-test/instance-1/dl/libinput/libinput-1.12.5.tar.xz | tar --strip-components=1 -C /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5   -xf -
>>> libinput 1.12.5 Patching
>>> libinput 1.12.5 Configuring
rm -rf /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5//build
mkdir -p /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5//build
PATH="/home/buildroot/buildroot-test/instance-1/output/host/bin:/home/buildroot/buildroot-test/instance-1/output/host/sbin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"  PYTHONNOUSERSITE=y /home/buildroot/buildroot-test/instance-1/output/host/bin/meson --prefix=/usr --libdir=lib --default-library=shared --buildtype=release --cross-file=/home/buildroot/buildroot-test/instance-1/output/host/etc/meson/cross-compilation.conf -Dtests=false -Dlibwacom=false -Ddocumentation=false -Ddebug-gui=false /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5/ /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5//build
The Meson build system
Version: 0.49.0
Source dir: /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5
Build dir: /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5/build
Build type: cross build
Project name: libinput
Project version: 1.12.5
Native C compiler: cc (gcc 4.8.4 "cc (Ubuntu 4.8.4-2ubuntu1~14.04.4) 4.8.4")
Cross C compiler: /home/buildroot/buildroot-test/instance-1/output/host/bin/riscv64-buildroot-linux-gnu-gcc (gcc 7.4.0)

meson.build:1:0: ERROR:  Unknown compiler(s): [['/home/buildroot/buildroot-test/instance-1/output/host/bin/riscv64-buildroot-linux-gnu-g++']]
The follow exceptions were encountered:
Running "/home/buildroot/buildroot-test/instance-1/output/host/bin/riscv64-buildroot-linux-gnu-g++ --version" gave "[Errno 2] No such file or directory: '/home/buildroot/buildroot-test/instance-1/output/host/bin/riscv64-buildroot-linux-gnu-g++': '/home/buildroot/buildroot-test/instance-1/output/host/bin/riscv64-buildroot-linux-gnu-g++'"

A full log can be found at /home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5/build/meson-logs/meson-log.txt
make: *** [/home/buildroot/buildroot-test/instance-1/output/build/libinput-1.12.5/.stamp_configured] Error 1
make: Leaving directory `/home/buildroot/buildroot-test/instance-1/buildroot'