Steps to Reproduce:
osc co Factory/pocl && cd $_
osc build --no-service --vm-type=kvm --build-opt=--vm-custom-opt="-cpu qemu64"
+compare result to one without build-opt using
/usr/lib/build/pkg-diff.sh $rpm1 $rpm2


Was previously solved with
https://build.opensuse.org/request/show/626138


/usr/lib64/libpocl.so.2.2.0 differs in assembler output
--- /tmp/tmp.3iZr1DZRz5/tmp.MomrQD5u2D  2018-09-26 04:41:09.682694138 +0000
+++ /tmp/tmp.3iZr1DZRz5/tmp.3XC0iGKeQV  2018-09-26 04:41:09.750694493 +0000
@@ -93827,10 +93827,10 @@
        lea    offset(%rsp),%rdi
        lea    offset(%rsp),%rsi
        callq 
<_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_assignERKS4_@plt>
-       mov    %r12,%rax
-       sub    offset(%rsp),%rax
-       cmp    $something,%rax
-       jbe    <_ZL14kernel_libraryP13_cl_device_id + ofs>
+       mov    offset(%rsp),%rax
+       or     $something,%rax
+       cmp    %r12,%rax
+       je     <_ZL14kernel_libraryP13_cl_device_id + ofs>
        lea    offset(%rip),%rsi        #   <supported_image_formats + ofs>


In the build-root I can see:

/home/abuild/rpmbuild/BUILD/pocl-1.2/build/CMakeCache.txt      2033-10-28
17:46:42.015636815 +0000
@@ -411,7 +411,7 @@
 LINK_COMMAND:FILEPATH=/usr/bin/ld

 //The Host CPU to use with llc
-LLC_HOST_CPU:STRING=haswell
+LLC_HOST_CPU:STRING=pentium2

 //LLVM assembler
 LLVM_AS:FILEPATH=/usr/bin/llvm-as
@@ -837,7 +837,7 @@
 Hwloc_hwloc_PREFIX:INTERNAL=
 Hwloc_hwloc_VERSION:INTERNAL=
 //Autodetected CPU
-LLC_HOST_CPU_AUTO:INTERNAL=haswell
+LLC_HOST_CPU_AUTO:INTERNAL=pentium2


might be an upstream pocl bug, where the result of CPU detection
accidentally gets used during build