Background: I tried to compile gdrive since the provided 386-binary crashed on my embedded platform.
When I tried with go from any go1.x.x.linux-386.tar.gz archives I found that this already crashes exactly the same way; then tried same go1.x.x.linux-386.tar.gz on same 32-bit Linux distro but with a 64-bit-capable processor (Pentium D Dualcore) and it works without crash. 1st I thought it might be an issue with AMD processors, but just also tested a Pentium 3 which is classified as i686 but crashes too:

root@voyage:~# go
SIGILL: illegal instruction
PC=0x81f4ea9

goroutine 1 [running, locked to thread]:
math.init·1()
/usr/local/go/src/math/pow10.go:34 +0x19 fp=0x1872df4c sp=0x1872df48
math.init()
/usr/local/go/src/math/unsafe.go:21 +0x3f fp=0x1872df50 sp=0x1872df4c
strconv.init()
/usr/local/go/src/strconv/quote.go:455 +0x45 fp=0x1872df6c sp=0x1872df50
go/parser.init()
/usr/local/go/src/go/parser/parser.go:2462 +0x4a fp=0x1872df78 sp=0x1872df6c
main.init()
/usr/local/go/src/cmd/go/zdefaultcc.go:6 +0x45 fp=0x1872dfcc sp=0x1872df78
runtime.main()
/usr/local/go/src/runtime/proc.go:58 +0xbd fp=0x1872dff0 sp=0x1872dfcc
runtime.goexit()
/usr/local/go/src/runtime/asm_386.s:2287 +0x1 fp=0x1872dff4 sp=0x1872dff0

goroutine 2 [runnable]:
runtime.forcegchelper()
/usr/local/go/src/runtime/proc.go:90
runtime.goexit()
/usr/local/go/src/runtime/asm_386.s:2287 +0x1

goroutine 3 [runnable]:
runtime.bgsweep()
/usr/local/go/src/runtime/mgc0.go:82
runtime.goexit()
/usr/local/go/src/runtime/asm_386.s:2287 +0x1

eax 0x187360a0
ebx 0x8570650
ecx 0x187000a0
edx 0x42ba5bf3
edi 0x7
esi 0x2af0
ebp 0x187360a0
esp 0x1872df48
eip 0x81f4ea9
eflags 0x10206
cs 0x73
fs 0x0
gs 0x33

root@voyage:# uname -a
Linux voyage 3.16.7-ckt9-voyage #1 SMP Thu Apr 23 11:10:44 HKT 2015 i686 GNU/Linux
root@voyage:# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 3
cpu MHz : 701.588
cache size : 256 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pse36 mmx fxsr sse
bogomips : 1403.17
clflush size : 32
cache_alignment : 32
address sizes : 36 bits physical, 32 bits virtual
power management:

root@voyage:# uname -a
Linux voyage 3.16.7-ckt9-voyage #1 SMP Thu Apr 23 11:10:44 HKT 2015 i586 GNU/Linux
root@voyage:# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 400.907
cache size : 64 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr cx8 pge mmx syscall 3dnow k6_mtrr vmmcall
bogomips : 801.81
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management:

root@voyage:# uname -a
Linux voyage 3.16.7-ckt9-voyage #1 SMP Thu Apr 23 11:10:44 HKT 2015 i586 GNU/Linux
root@voyage:# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 10
model name : Geode(TM) Integrated Processor by AMD PCS
stepping : 2
cpu MHz : 498.061
cache size : 128 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de pse tsc msr cx8 sep pge cmov clflush mmx mmxext 3dnowext 3dnow vmmcall
bogomips : 996.12
clflush size : 32
cache_alignment : 32
address sizes : 32 bits physical, 32 bits virtual
power management:

Finally I was able to create a gdrive binary which works with all 3 processors above when I use gccgo (on the Pentium D box):
go build -compiler gccgo -gccgoflags '-static-libgo' drive.go

It seems to me that probably something with the toolchain wrongly uses 64-bit instructions (asm stuff?) when using gc ...