Raspberry Pi 32bit build failure - OpenCV

[peardox]

Compilation test using Oracle JDK 8

debug.opencv.log.gz

This appears to be the error in question...

opencv/target/native/org/bytedeco/opencv/linux-armhf/jniopencv_core.cpp:124812:1: internal compiler error: Segmentation fault

A nice specific error this time with -X -e

[saudet]

That just looks like it's running out of memory. Make sure that's not happening by monitoring memory usage with top.

[peardox]

Yep - tried it again while running a free -m every second

For Tensorflow a native Pi build you have to alter a build script to limit Java's memory use with -J-Xmx500M or similar. Can I try something like that with Maven + if so add what switches + where

      date     time           total        used        free      shared  buff/cache   available
2019-10-16 17:37:17            3906         203        1359          60        2343        3494
2019-10-16 17:37:18            3906         203        1359          60        2343        3494
...
2019-10-16 18:08:06            3906        1468          96          60        2341        2229
2019-10-16 18:08:07            3906        1492          71          60        2341        2205
2019-10-16 18:08:08            3906        1497          66          60        2341        2200
2019-10-16 18:08:09            3906        1502          61          60        2341        2194
2019-10-16 18:08:10            3906        1508          56          60        2341        2189
2019-10-16 18:08:11            3906        1515          84          60        2305        2181

Lots of usage too

18:08:00 up 7 days, 23:15,  4 users,  load average: 1.92, 1.61, 1.27

[saudet]

GCC is the issue, not Maven. I'm not aware of any such switch for GCC. Try to add more swap space.

[peardox]

I'm using 8G Swap on a 4G 32 bit Pi.

A potential problem is the 4G address space on 32 but OSes as it gets much further on my 64 bit Nano.

I'll mess around a bit and see what I can come up with...

[saudet]

Right, it won't be able to get much higher than 2 or 3 GB... Disabling things like compiler optimizations usually reduces memory usage.

[peardox]

I just gave it another do with swappiness set to 90 - still failed

Next idea - try compiling it on 64 bit with a -m32 switch - it compiles fine on arm64, If this works then all the cppbuild.sh scripts are going to need thee -32 - worry about that if test works

While it's not an ideal solution it's an acceptable one IMHO as it only requires a 64 bit OS to build (I hope)

[peardox]

Something nice - gcc-multilib-arm-linux-gnueabihf includes arm-linux-gnueabihf-gcc on 64-bit so no changes required to cppbuild.sh, it appears

JavaCPP compiled correctly

[peardox]

Oh well - too much to hope for I guess. It's trying to compile some 64 bit ASM

This is openblas...

Invoked with

mvn install -Djavacpp.platform=linux-armhf -Dmaven.javadoc.skip=true -DVERBOSE=1

make[1]: warning: -jN forced in submake: disabling jobserver mode. make[1]: *** No rule to make target '../kernel/arm64/amin.S', needed by 'samin_k.o'. Stop. make[1]: *** Waiting for unfinished jobs.... ../kernel/arm64/amax.S: Assembler messages: ../kernel/arm64/amax.S:162: Error: ARM register expected -- cmp x0,xzr'
../kernel/arm64/amax.S:164: Error: ARM register expected -- cmp x2,xzr' ../kernel/arm64/amax.S:167: Error: ARM register expected -- cmp x2,#1'
../kernel/arm64/amax.S:172: Error: ARM register expected -- asr x5,x0,#2' ../kernel/arm64/amax.S:173: Error: ARM register expected -- cmp x5,xzr'
../kernel/arm64/amax.S:176: Error: bad instruction ld1 {v0.4s},[x1],#16' ../kernel/arm64/amax.S:176: Error: bad instruction fabs v0.4s,v0.4s'
../kernel/arm64/amax.S:176: Error: bad instruction fmaxv s0,v0.4s' ../kernel/arm64/amax.S:177: Error: ARM register expected -- subs x5,x5,#1'
../kernel/arm64/amax.S:182: Error: bad instruction ld1 {v1.4s},[x1],#16' ../kernel/arm64/amax.S:182: Error: bad instruction fabs v1.4s,v1.4s'
../kernel/arm64/amax.S:182: Error: bad instruction fmaxv s1,v1.4s' ../kernel/arm64/amax.S:182: Error: bad instruction fcmp s0,s1'
../kernel/arm64/amax.S:182: Error: bad instruction fcsel s0,s0,s1,ge' ../kernel/arm64/amax.S:184: Error: ARM register expected -- subs x5,x5,#1'
../kernel/arm64/amax.S:189: Error: ARM register expected -- ands x5,x0,#3' ../kernel/arm64/amax.S:194: Error: ARM register expected -- ldr s1,[x1],#4'
../kernel/arm64/amax.S:194: Error: bad instruction fabs s1,s1' ../kernel/arm64/amax.S:194: Error: bad instruction fcmp s0,s1'
../kernel/arm64/amax.S:194: Error: bad instruction fcsel s0,s0,s1,ge' ../kernel/arm64/amax.S:196: Error: ARM register expected -- subs x5,x5,#1'
../kernel/arm64/amax.S:199: Error: bad instruction ret' ../kernel/arm64/amax.S:203: Error: ARM register expected -- ldr s0,[x1],#4'
../kernel/arm64/amax.S:203: Error: bad instruction fabs s0,s0' ../kernel/arm64/amax.S:204: Error: ARM register expected -- subs x0,x0,#1'
../kernel/arm64/amax.S:209: Error: ARM register expected -- lsl x2,x2,#2' ../kernel/arm64/amax.S:209: Error: bad instruction ld1 {v0.s}[0],[x1],x2'
../kernel/arm64/amax.S:209: Error: bad instruction fabs s0,s0' ../kernel/arm64/amax.S:211: Error: ARM register expected -- subs x0,x0,#1'
../kernel/arm64/amax.S:214: Error: ARM register expected -- asr x5,x0,#2' ../kernel/arm64/amax.S:215: Error: ARM register expected -- cmp x5,xzr'
../kernel/arm64/amax.S:220: Error: bad instruction ld1 {v1.s}[0],[x1],x2' ../kernel/arm64/amax.S:220: Error: bad instruction fabs s1,s1'
../kernel/arm64/amax.S:220: Error: bad instruction fcmp s0,s1' ../kernel/arm64/amax.S:220: Error: bad instruction fcsel s0,s0,s1,ge'
../kernel/arm64/amax.S:221: Error: bad instruction ld1 {v1.s}[0],[x1],x2' ../kernel/arm64/amax.S:221: Error: bad instruction fabs s1,s1'
../kernel/arm64/amax.S:221: Error: bad instruction fcmp s0,s1' ../kernel/arm64/amax.S:221: Error: bad instruction fcsel s0,s0,s1,ge'
../kernel/arm64/amax.S:222: Error: bad instruction ld1 {v1.s}[0],[x1],x2' ../kernel/arm64/amax.S:222: Error: bad instruction fabs s1,s1'
../kernel/arm64/amax.S:222: Error: bad instruction fcmp s0,s1' ../kernel/arm64/amax.S:222: Error: bad instruction fcsel s0,s0,s1,ge'
../kernel/arm64/amax.S:223: Error: bad instruction ld1 {v1.s}[0],[x1],x2' ../kernel/arm64/amax.S:223: Error: bad instruction fabs s1,s1'
../kernel/arm64/amax.S:223: Error: bad instruction fcmp s0,s1' ../kernel/arm64/amax.S:223: Error: bad instruction fcsel s0,s0,s1,ge'
../kernel/arm64/amax.S:225: Error: ARM register expected -- subs x5,x5,#1' ../kernel/arm64/amax.S:230: Error: ARM register expected -- ands x5,x0,#3'
../kernel/arm64/amax.S:235: Error: bad instruction ld1 {v1.s}[0],[x1],x2' ../kernel/arm64/amax.S:235: Error: bad instruction fabs s1,s1'
../kernel/arm64/amax.S:235: Error: bad instruction fcmp s0,s1' ../kernel/arm64/amax.S:235: Error: bad instruction fcsel s0,s0,s1,ge'
../kernel/arm64/amax.S:237: Error: ARM register expected -- subs x5,x5,#1' ../kernel/arm64/amax.S:242: Error: bad instruction ret'
../kernel/arm64/amax.S:246: Error: bad instruction fmov s0,wzr' ../kernel/arm64/amax.S:247: Error: bad instruction ret'
Makefile.L1:525: recipe for target 'samax_k.o' failed
make[1]: *** [samax_k.o] Error 1
Makefile:149: recipe for target 'libs' failed
make: *** [libs] Error 1
`