Problem Description 
====================== 
sysstat build failed when add lm-sensors to the rootfs



Expected Behavior 
====================== 
 sysstat should build successfully!


Observed Behavior 
====================== 
| a - common.o
| a - ioconf.o
| i686-wrs-linux-gnu-gcc   -m64 -Wl,-O1 -Wl,--hash-style=gnu
--sysroot=/buildarea2/fli/intel-xeon-core/bitbake_build/tmp/sysroots/intel-xeon-core -o sadc -O2 -pipe -g -feliminate-unused-debug-types -Wall -Wstrict-prototypes -pipe -O2 sadc.o act_sadc.o sa_wrap.o sa_common.o librdstats.a librdsensors.a libsyscom.a
| sadc.o: In function `main':
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/sadc.c:987: undefined reference to `sensors_init'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/sadc.c:1143: undefined reference to `sensors_cleanup'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/sadc.c:989: undefined reference to `sensors_strerror'
| librdsensors.a(rd_sensors.o): In function `read_fan':
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:66: undefined reference to `sensors_get_detected_chips'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:68: undefined reference to `sensors_get_features'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:72: undefined reference to `sensors_snprintf_chip_name'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:74: undefined reference to `sensors_get_all_subfeatures'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:82: undefined reference to `sensors_get_value'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:77: undefined reference to `sensors_get_value'
| librdsensors.a(rd_sensors.o): In function `read_temp':
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:120: undefined reference to `sensors_get_detected_chips'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:122: undefined reference to `sensors_get_features'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:126: undefined reference to `sensors_snprintf_chip_name'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:128: undefined reference to `sensors_get_all_subfeatures'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:141: undefined reference to `sensors_get_value'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:131: undefined reference to `sensors_get_value'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:136: undefined reference to `sensors_get_value'
| librdsensors.a(rd_sensors.o): In function `read_in':
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:179: undefined reference to `sensors_get_detected_chips'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:181: undefined reference to `sensors_get_features'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:185: undefined reference to `sensors_snprintf_chip_name'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:187: undefined reference to `sensors_get_all_subfeatures'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:190: undefined reference to `sensors_get_value'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:200: undefined reference to `sensors_get_value'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:195: undefined reference to `sensors_get_value'
| librdsensors.a(rd_sensors.o): In function `get_sensors_nr':
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:231: undefined reference to `sensors_get_detected_chips'
| /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/sysstat-10.0.3/rd_sensors.c:233: undefined reference to `sensors_get_features'
| collect2: ld returned 1 exit status
| make: *** [sadc] Error 1
| ERROR: oe_runmake failed
| ERROR: Function failed: do_compile
(see /buildarea2/fli/intel-xeon-core/bitbake_build/tmp/work/x86_64-wrs-linux/sysstat-10.0.3-r1/temp/do_compile/log.do_compile.19161 for further information)
NOTE: package sysstat-10.0.3-r1: task do_compile: Failed
ERROR: Task 4
(/buildarea2/fli/intel-xeon-core/layers/oe-core/meta/recipes-extended/sysstat/sysstat_10.0.3.bb, do_compile) failed with exit code '1'
NOTE: Tasks Summary: Attempted 181 tasks of which 176 didn't need to
be rerun and 1 failed.

Summary: 1 task failed:
  /buildarea2/fli/intel-xeon-core/layers/oe-core/meta/recipes-extended/sysstat/sysstat_10.0.3.bb, do_compile
Summary: There was 1 ERROR message shown, returning a non-zero exit
code.
make: *** [sysstat.compile] Error 1
make: Leaving directory `/buildarea2/fli/intel-xeon-core/build'


Misc Info 
====================== 
when added the lm-sensors to the rootfs, sysstat will detect the
sensors existing, and would compile sadc
with sensors lib, but in the sysstat.inc file, it set 
EXTRA_OEMAKE += 'LFLAGS=""'
this empty LFLAGS will pass to sysstat Makefile and rm the sensors
lib, so that this cause errors


Steps to Reproduce 
======================
configure
--enable-board=intel-xeon-core --enable-rootfs=glibc_std
--enable-kernel=standard --with-layer=<wrll-runtime-testing>/userspace
 --with-template=feature/userspace-base

make -C build lm-sensors.addpkg
make -C build sysstat