On Olimex-Lime2 board gcc is automatically compiled using soft-float convention. For that reason /usr/include/arm-linux-gnueabihf/ is not part of gcc include path and causes the following failure :

INFO     /srv/slapgrid/slappart9/srv/runner/shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b__compile__/gcc-8.4.0/host-armv7l-unknown-linux-gnueabihf/gcc/xgcc -B/srv/slapgrid/slappart9/srv/runner/shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b__compile__/gcc-8.4.0/host-armv7l-unknown-linux-gnueabihf/gcc/ -B/srv/slapgrid/slappart9/srv//runner//shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b/armv7l-unknown-linux-gnueabihf/bin/ -B/srv/slapgrid/slappart9/srv//runner//shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b/armv7l-unknown-linux-gnueabihf/lib/ -isystem /srv/slapgrid/slappart9/srv//runner//shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b/armv7l-unknown-linux-gnueabihf/include -isystem /srv/slapgrid/slappart9/srv//runner//shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b/armv7l-unknown-linux-gnueabihf/sys-include    -g -O2 -O2  -g -O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include   -fPIC -fno-inline -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -fPIC -fno-inline -I. -I. -I../../host-armv7l-unknown-linux-gnueabihf/gcc -I../.././libgcc -I../.././libgcc/. -I../.././libgcc/../gcc -I../.././libgcc/../include  -DHAVE_CC_TLS  -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c ../.././libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
INFO     In file included from ../.././libgcc/../gcc/tsystem.h:87,
INFO                      from ../.././libgcc/libgcc2.c:27:
INFO     /usr/include/stdio.h:27:10: fatal error: bits/libc-header-start.h: No such file or directory
INFO      #include <bits/libc-header-start.h>
INFO               ^~~~~~~~~~~~~~~~~~~~~~~~~~
INFO     compilation terminated.
INFO     make[2]: *** [Makefile:494: _muldi3.o] Error 1
INFO     make[2]: Leaving directory '/srv/slapgrid/slappart9/srv/runner/shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b__compile__/gcc-8.4.0/armv7l-unknown-linux-gnueabihf/libgcc'
INFO     make[1]: *** [Makefile:13083: all-target-libgcc] Error 2
INFO     make[1]: Leaving directory '/srv/slapgrid/slappart9/srv/runner/shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b__compile__/gcc-8.4.0'
INFO     make: *** [Makefile:906: all] Error 2
INFO     gcc-8.4: Command 'set -e;make ' returned non-zero exit status 2
INFO     gcc-8.4: Compilation error. The package is left as is at /srv/slapgrid/slappart9/srv/runner/shared/gcc-8.4/d1d1b17343c3970af0b76d5044f88d0b__compile__/gcc-8.4.0 where you can inspect what went wrong.