Hi all, Am trying to use crash to analyse a dump file produced on an ARM-32. (Actually, it's on a Qemu-emulated ARM Vexpress-CA9 platform). Have succeeded in setting up and building a custom kernel with KEXEC, etc enabled, done the kexec of the dump kernel, triggered a crash (via /proc/sysrq-trigger). The system then 'reboots' successfully into the dump kernel (same zImage btw), and I can see and copy the /proc/vmcore kdump file. All fine there. The issue is in analysing the same using the crash utility on my x86_64 (Ubuntu 17.04) host. I realize: "... On an x86 or x86_64 host, a 32-bit x86 binary that can be used to analyze 32-bit arm dumpfiles may be built by typing "make target=ARM". ..." But the build fails, pl see output below: git clone https://github.com/crash-utility/crash.git cd crash make target=ARM TARGET: ARM CRASH: 7.1.9++ GDB: 7.6 --snip-- <lots of o/p> gcc -m32 -static-libstdc++ -static-libgcc \ -o ../../crash ../../crashlib.a arm-tdep.o arm-linux-tdep.o glibc-tdep.o solib-svr4.o symfile-mem.o linux-tdep.o ser-base.o ser-unix.o ser-pipe.o ser-tcp.o remote.o dcache.o tracepoint.o ax-general.o ax-gdb.o remote-fileio.o remote-notif.o cli-dump.o cli-decode.o cli-script.o cli-cmds.o cli-setshow.o cli-logging.o cli-interp.o cli-utils.o mi-out.o mi-console.o mi-cmds.o mi-cmd-catch.o mi-cmd-env.o mi-cmd-var.o mi-cmd-break.o mi-cmd-stack.o mi-cmd-file.o mi-cmd-disas.o mi-symbol-cmds.o mi-cmd-target.o mi-cmd-info.o mi-interp.o mi-main.o mi-parse.o mi-getopt.o tui-command.o tui-data.o tui-disasm.o tui-file.o tui-hooks.o tui-interp.o tui-io.o tui-layout.o tui-out.o tui-regs.o tui-source.o tui-stack.o tui-win.o tui-windata.o tui-wingeneral.o tui-winsource.o tui.o python.o py-value.o py-prettyprint.o py-auto-load.o elfread.o stap-probe.o posix-hdep.o c-exp.o cp-name-parser.o ada-exp.o jv-exp.o f-exp.o go-exp.o m2-exp.o p-exp.o version.o annotate.o addrmap.o auto-load.o auxv.o agent.o bfd-target.o blockframe.o breakpoint.o break-catch-sig.o findvar.o regcache.o cleanups.o charset.o continuations.o corelow.o disasm.o dummy-frame.o dfp.o source.o value.o eval.o valops.o valarith.o valprint.o printcmd.o block.o symtab.o psymtab.o symfile.o symmisc.o linespec.o dictionary.o infcall.o infcmd.o infrun.o expprint.o environ.o stack.o thread.o exceptions.o filesystem.o inf-child.o interps.o minidebug.o main.o macrotab.o macrocmd.o macroexp.o macroscope.o mi-common.o event-loop.o event-top.o inf-loop.o completer.o gdbarch.o arch-utils.o gdbtypes.o gdb_bfd.o gdb_obstack.o osabi.o copying.o memattr.o mem-break.o target.o parse.o language.o buildsym.o findcmd.o std-regs.o signals.o exec.o reverse.o bcache.o objfiles.o observer.o minsyms.o maint.o demangle.o dbxread.o coffread.o coff-pe-read.o dwarf2read.o mipsread.o stabsread.o corefile.o dwarf2expr.o dwarf2loc.o dwarf2-frame.o dwarf2-frame-tailcall.o ada-lang.o c-lang.o d-lang.o f-lang.o objc-lang.o ada-tasks.o ada-varobj.o ui-out.o cli-out.o varobj.o vec.o go-lang.o go-valprint.o go-typeprint.o jv-lang.o jv-valprint.o jv-typeprint.o m2-lang.o opencl-lang.o p-lang.o p-typeprint.o p-valprint.o sentinel-frame.o complaints.o typeprint.o ada-typeprint.o c-typeprint.o f-typeprint.o m2-typeprint.o ada-valprint.o c-valprint.o cp-valprint.o d-valprint.o f-valprint.o m2-valprint.o serial.o mdebugread.o top.o utils.o ui-file.o user-regs.o frame.o frame-unwind.o doublest.o frame-base.o inline-frame.o gnu-v2-abi.o gnu-v3-abi.o cp-abi.o cp-support.o cp-namespace.o reggroups.o regset.o trad-frame.o tramp-frame.o solib.o solib-target.o prologue-value.o memory-map.o memrange.o xml-support.o xml-syscall.o xml-utils.o target-descriptions.o target-memory.o xml-tdesc.o xml-builtin.o inferior.o osdata.o gdb_usleep.o record.o record-full.o gcore.o gdb_vecs.o jit.o progspace.o skip.o probe.o common-utils.o buffer.o ptid.o gdb-dlfcn.o common-agent.o format.o registry.o btrace.o record-btrace.o inflow.o init.o \ ../readline/libreadline.a ../opcodes/libopcodes.a ../bfd/libbfd.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a -ldl -lncurses -lm ../libiberty/libiberty.a build-gnulib/import/libgnu.a -lz -ldl -rdynamic /usr/bin/ld: cannot find -lz collect2: error: ld returned 1 exit status Makefile:1174: recipe for target 'gdb' failed make[3]: *** [gdb] Error 1 Makefile:244: recipe for target 'rebuild' failed make[2]: *** [rebuild] Error 2 Makefile:229: recipe for target 'gdb_merge' failed make[1]: *** [gdb_merge] Error 2 Makefile:224: recipe for target 'all' failed make: *** [all] Error 2 $ Looks to me like it fails with /usr/bin/ld: cannot find -lz So, I did the usual checks; i have these 'libz' libs installed on the box: $ dpkg -l |grep "libz.*comp" ii libzstd-dev 1.1.2-1 amd64 fast lossless compression algorithm -- development files ii libzstd1 1.1.2-1 amd64 fast lossless compression algorithm $ What package(s) do I need to install to overcome this issue? / what am i doing wrong? Any help appreciated, tia! Regards, Kaiwan.