Cannot compile a minimal program. The toolchain or QMakeSpec is broken

I get this message when the script tries to build Qt5:

This is the Qt Open Source Edition.
You have already accepted the terms of the Open Source license.

Running configuration tests...
Checking for gold linker... yes
Checking for machine tuple... yes
Checking for valid makespec... Note: Also available for Linux: linux-clang linux-icc

ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.

Check config.log for details.

Here the config.log output:

Command line: -release -opengl es2 -device linux-rasp-pi-g++ -qpa eglfs -no-libinput -no-linuxfb -no-xcb -no-kms -no-gbm -no-gtk -no-widgets -no-compile-examples -no-sql-tds -device-option CROSS_COMPILE=/home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/arm-linux-gnueabihf- -sysroot /home/mark/opt/rpi-ramdisk/sysroot/sysroot -opensource -confirm-license -make libs -strip -optimize-size -prefix /opt/qt -extprefix /home/mark/opt/rpi-ramdisk/packages/qt/stage//opt/qt -hostprefix /home/mark/opt/rpi-ramdisk/packages/qt/qt-host
executing config test use_gold_linker
+ cd /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/config.tests && /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/arm-linux-gnueabihf-g++ -pipe -marm -mfpu=vfp -mtune=arm1176jzf-s -march=armv6zk -mabi=aapcs-linux -mfloat-abi=hard -fuse-ld=gold -o conftest-out conftest.cpp
test config.qtbase.tests.use_gold_linker succeeded
executing config test machineTuple
+ /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/arm-linux-gnueabihf-g++ -dumpmachine
> arm-linux-gnueabihf
test config.qtbase.tests.machineTuple succeeded
executing config test verifyspec
+ cd /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/config.tests/verifyspec && /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared use_gold_linker warn_off console single_arch" "QMAKE_CFLAGS += --sysroot=/home/mark/opt/rpi-ramdisk/sysroot/sysroot" "QMAKE_CXXFLAGS += --sysroot=/home/mark/opt/rpi-ramdisk/sysroot/sysroot" "QMAKE_LFLAGS += --sysroot=/home/mark/opt/rpi-ramdisk/sysroot/sysroot" -early "CONFIG += cross_compile" /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/config.tests/verifyspec
> Info: creating stash file /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/config.tests/.qmake.stash
+ cd /home/mark/opt/rpi-ramdisk/packages/qt/qtbase/config.tests/verifyspec && MAKEFLAGS= /usr/bin/make
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/arm-linux-gnueabihf-g++ -c -pipe -marm -mfpu=vfp -mtune=arm1176jzf-s -march=armv6zk -mabi=aapcs-linux -mfloat-abi=hard --sysroot=/home/mark/opt/rpi-ramdisk/sysroot/sysroot -O2 -w -fPIC  -I. -I/home/mark/opt/rpi-ramdisk/packages/qt/qtbase/mkspecs/devices/linux-rasp-pi-g++ -o verifyspec.o verifyspec.cpp
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/arm-linux-gnueabihf-g++ -mfloat-abi=hard --sysroot=/home/mark/opt/rpi-ramdisk/sysroot/sysroot -Wl,-O1 -fuse-ld=gold -Wl,-rpath-link,/home/mark/opt/rpi-ramdisk/sysroot/sysroot/opt/vc/lib -Wl,-rpath-link,/home/mark/opt/rpi-ramdisk/sysroot/sysroot/usr/lib/arm-linux-gnueabihf -Wl,-rpath-link,/home/mark/opt/rpi-ramdisk/sysroot/sysroot/lib/arm-linux-gnueabihf -o verifyspec verifyspec.o      
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/../lib/gcc/arm-linux-gnueabihf/6.4.1/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot open crt1.o: File o directory non esistente
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/../lib/gcc/arm-linux-gnueabihf/6.4.1/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot open crti.o: File o directory non esistente
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/../lib/gcc/arm-linux-gnueabihf/6.4.1/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot open crtn.o: File o directory non esistente
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/../lib/gcc/arm-linux-gnueabihf/6.4.1/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot find -lm
> /home/mark/opt/rpi-ramdisk/sysroot/toolchain/bin/../lib/gcc/arm-linux-gnueabihf/6.4.1/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot find -lc
> collect2: error: ld returned 1 exit status
> make: *** [Makefile:66: verifyspec] Error 1

if the linker searches for cross-compiler libs they are in:

/home/mark/opt/rpi-ramdisk/sysroot/toolchain/arm-linux-gnueabihf/libc/usr/lib/

so it should find them.
Any idea?

I don't know if it's the right way fix but I've issued:

cp -r sysroot/toolchain/arm-linux-gnueabihf/libc/ sysroot/sysroot/

and it was able to continue configuration.