Issue compiling under Ubuntu 18.04

[fpiraneo]

Hi, trying to compile under ubuntu 18.04 following indications, this is the result:

gcc -mtune=amdfam10 -O3 -ffast-math -mabm -msse4a -pipe -pthread -o minerd minerd-cpu-miner.o minerd-util.o minerd-sha2.o minerd-sha2-arm.o minerd-sha2-x86.o minerd-sha2-x64.o minerd-scrypt.o minerd-scrypt-arm.o minerd-scrypt-x86.o minerd-scrypt-x64.o minerd-aes_helper.o minerd-luffa_for_sse2.o minerd-shavite.o minerd-cubehash_sse2.o minerd-nist.o minerd-vector.o minerd-echo.o minerd-xcoin.o -lcurl -ljansson -lpthread
/usr/bin/x86_64-linux-gnu-ld: minerd-xcoin.o: relocation R_X86_64_32S against symbol ``grsoT0' can not be used when making a PIE object; recompile with -fPIC
/usr/bin/x86_64-linux-gnu-ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
Makefile:476: recipe for target 'minerd' failed
make[2]: *** [minerd] Error 1
make[2]: Leaving directory '/root/darkcoin-cpuminer-1.2c-master'
Makefile:791: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/root/darkcoin-cpuminer-1.2c-master'
Makefile:380: recipe for target 'all' failed
make: *** [all] Error 2

Any help is strongly appreciated.

Thank you.

Side notes
I'm compiling for this CPU:

cpu family : 16
model : 8
model name : Six-Core AMD Opteron(tm) Processor 8439 SE
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate vmmcall npt lbrv svm_lock nrip_save pausefilter
bugs : tlb_mmatch fxsave_leak sysret_ss_attrs null_seg amd_e400 spectre_v1 spectre_v2
power management: ts ttp tm stc 100mhzsteps hwpstate

On a forum I've found these flags for AMD CPUs:

CFLAGS="-mtune=amdfam10 -O3 -ffast-math -mabm -msse4a -pipe"

Note that same issue as above is present when compiling with just:

CFLAGS="-O3"