Just built hwloc-1.11.7 on Solaris 11.3 & SPARC T7-2.  Should finding
cache & pci info work?   Not sure if I missed some build flags as I just did a 
vanilla build.
Poked around in the mailist user and devel archives but didnt’ find anything.

Build script
#!/bin/sh
export CC=/opt/developerstudio12.5/bin/cc
export CFLAGS="-m64 -O3"

./configure 2>&1 | tee build.out
make install 2>&1 | tee -a build.out


bash-4.3$ HWLOC_COMPONENTS_VERBOSE=1 /usr/local/bin/hwloc-info -v
Registered cpu discovery component `no_os' with priority 40 (statically build)
Registered global discovery component `xml' with priority 30 (statically build)
Registered global discovery component `synthetic' with priority 30 (statically 
build)
Registered global discovery component `custom' with priority 30 (statically 
build)
Registered cpu discovery component `solaris' with priority 50 (statically build)
Registered misc discovery component `pci' with priority 20 (statically build)
Enabling cpu discovery component `solaris'
Enabling cpu discovery component `no_os'
Excluding global discovery component `xml', conflicts with excludes 0x2
Excluding global discovery component `synthetic', conflicts with excludes 0x2
Excluding global discovery component `custom', conflicts with excludes 0x2
Enabling misc discovery component `pci'
Final list of enabled discovery components: solaris,no_os,pci
depth 0:        1 Machine (type #1)
 depth 1:       2 NUMANode (type #2)
  depth 2:      2 Package (type #3)
   depth 3:     64 Core (type #5)
    depth 4:    512 PU (type #6)
Disabling cpu discovery component `solaris'
Disabling cpu discovery component `no_os'
Disabling misc discovery component `pci’

bash-4.3$ /usr/sbin/prtpicl -v -c cpu | grep -i cache-size | sort | uniq
  :l1-dcache-size        16384 
  :l1-icache-size        16384 
  :l2-dcache-size        262144 
  :l2-icache-size        262144 
  :l3-cache-size         8388608 


TIA-
—maureen
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