To enable serial port tests, use:
	perl Makefile.PL TESTPORT=<DEVICE>
where <DEVICE> is a specific port or 'auto' to autodetect.
Running ./configure ...
configure: loading site script /builder/shared-workdir/build/sdk/include/site/mips
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for gcc option to accept ISO C99... none needed
checking for gcc option to accept ISO Standard C... (cached) none needed
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /builder/shared-workdir/build/sdk/staging_dir/host/bin/grep
checking for egrep... /builder/shared-workdir/build/sdk/staging_dir/host/bin/grep -E
checking for ANSI C header files... yes
checking for library containing strerror... none required
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
checking for sys/ioctl.h... yes
checking termios.h usability... yes
checking termios.h presence... yes
checking for termios.h... yes
checking sys/termiox.h usability... no
checking sys/termiox.h presence... no
checking for sys/termiox.h... no
checking sys/termios.h usability... yes
checking sys/termios.h presence... yes
checking for sys/termios.h... yes
checking sys/ttycom.h usability... no
checking sys/ttycom.h presence... no
checking for sys/ttycom.h... no
checking sys/modem.h usability... no
checking sys/modem.h presence... no
checking for sys/modem.h... no
checking IOKit/serial/ioss.h usability... no
checking IOKit/serial/ioss.h presence... no
checking for IOKit/serial/ioss.h... no
checking definition of _SC_CLK_TCK... found
checking definition of TIOCMBIS... found
checking definition of TIOCMBIC... found
checking definition of TIOCMGET... found
checking definition of CRTSCTS... found
checking definition of OCRNL... found
checking definition of ONLCR... found
checking definition of ECHOKE... found
checking definition of ECHOCTL... found
checking definition of TIOCM_CAR... found
checking definition of TIOCM_CD... found
checking definition of TIOCM_RNG... found
checking definition of TIOCM_RI... found
checking definition of TIOCM_CTS... found
checking definition of TIOCM_DSR... found
checking definition of TIOCMIWAIT... found
checking definition of TIOCGICOUNT... found
checking definition of TIOCINQ... found
checking definition of FIONREAD... found
checking definition of TIOCOUTQ... found
checking definition of TIOCSER_TEMT... found
checking definition of TIOCM_LE... found
checking definition of TIOCSERGETLSR... found
checking definition of TIOCSDTR... missing
checking definition of TIOCCDTR... missing
checking definition of TIOCM_RTS... found
checking definition of TIOCM_DTR... found
checking definition of CTSXON... missing
checking definition of RTSXOFF... missing
checking definition of TCGETX... found
checking definition of TCSETX... found
checking definition of IOSSIOSPEED... missing
checking definition of B0... found
checking definition of B50... found
checking definition of B75... found
checking definition of B110... found
checking definition of B134... found
checking definition of B150... found
checking definition of B200... found
checking definition of B300... found
checking definition of B600... found
checking definition of B1200... found
checking definition of B1800... found
checking definition of B2400... found
checking definition of B4800... found
checking definition of B9600... found
checking definition of B19200... found
checking definition of B38400... found
checking definition of B57600... found
checking definition of B115200... found
checking definition of B230400... found
checking definition of B460800... found
checking definition of B500000... found
checking definition of B576000... found
checking definition of B921600... found
checking definition of B1000000... found
checking definition of B1152000... found
checking definition of B1500000... found
checking definition of B2000000... found
checking definition of B2500000... found
checking definition of B3000000... found
checking definition of B3500000... found
checking definition of B4000000... found
checking serial control via ioctl... yes
checking read/write of RTS signal... yes
checking read/write of DTR signal... yes
checking read access to modem lines... yes
checking read access to buffer status... yes
checking read access to serial line status... yes
checking normal CTS/RTS flow control... yes
configure: creating ./config.status
config.status: creating config.h
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for Device::SerialPort
Writing MYMETA.yml and MYMETA.json

You're ready to run 'make' now...
make[4]: Entering directory '/builder/shared-workdir/build/sdk/build_dir/target-mips_24kc_musl/perl/Device-SerialPort-1.04'
cp SerialPort.pm blib/lib/Device/SerialPort.pm
Running Mkbootstrap for SerialPort ()
chmod 644 "SerialPort.bs"
"/builder/shared-workdir/build/sdk/staging_dir/hostpkg/usr/bin/perl5.28.1" -MExtUtils::Command::MM -e 'cp_nonempty' -- SerialPort.bs blib/arch/auto/Device/SerialPort/SerialPort.bs 644
"/builder/shared-workdir/build/sdk/staging_dir/hostpkg/usr/bin/perl5.28.1" "/builder/shared-workdir/build/sdk/staging_dir/hostpkg/usr/lib/perl5/5.28.1/ExtUtils/xsubpp"  -typemap '/builder/shared-workdir/build/sdk/staging_dir/hostpkg/usr/lib/perl5/5.28.1/ExtUtils/typemap'  SerialPort.xs > SerialPort.xsc
mv SerialPort.xsc SerialPort.c
mips-openwrt-linux-gcc -c  -I. -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -fhonour-copts -msoft-float -ffile-prefix-map=/builder/shared-workdir/build/sdk/build_dir/target-mips_24kc_musl/perl/Device-SerialPort-1.04=Device-SerialPort-1.04 -mips16 -minterlink-mips16 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-mips_24kc_gcc-12.3.0_musl/usr/include -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-mips_24kc_gcc-12.3.0_musl/include/fortify -I/builder/shared-workdir/build/sdk/staging_dir/toolchain-mips_24kc_gcc-12.3.0_musl/include -D_REENTRANT -D_GNU_SOURCE -O2   -DVERSION=\"1.04\" -DXS_VERSION=\"1.04\" -fPIC "-I/builder/shared-workdir/build/sdk/staging_dir/target-mips_24kc_musl/usr/lib/perl5/5.28/CORE/"   SerialPort.c
SerialPort.xs:1:10: fatal error: EXTERN.h: No such file or directory
    1 | #include "EXTERN.h"
      |          ^~~~~~~~~~
compilation terminated.
make[4]: *** [Makefile:337: SerialPort.o] Error 1
make[4]: Leaving directory '/builder/shared-workdir/build/sdk/build_dir/target-mips_24kc_musl/perl/Device-SerialPort-1.04'
make[3]: *** [Makefile:70: /builder/shared-workdir/build/sdk/build_dir/target-mips_24kc_musl/perl/Device-SerialPort-1.04/.built] Error 2
time: package/feeds/packages/perl-device-serialport/compile#7.32#4.43#18.32