gistfile1.txt

checking for __linux__... yes
checking for -lrt... yes
checking for stdatomic.h... yes
creating Makefile

current directory: /usr/local/bundle/gems/scout_apm-3.0.0.pre25/ext/stacks
make "DESTDIR=" clean

current directory: /usr/local/bundle/gems/scout_apm-3.0.0.pre25/ext/stacks
make "DESTDIR="
compiling stacks.c
stacks.c: In function 'init_thread_vars':
stacks.c:306:23: error: 'SIGEV_THREAD_ID' undeclared (first use in this
function)
   _sev.sigev_notify = SIGEV_THREAD_ID;
                       ^
stacks.c:306:23: note: each undeclared identifier is reported only once for each
function it appears in
stacks.c:308:7: error: 'struct sigevent' has no member named '_sigev_un'
   _sev.sigev_notify_thread_id = syscall(SYS_gettid);
       ^
stacks.c: At top level:
cc1: warning: unrecognized command line option '-Wno-self-assign'
cc1: warning: unrecognized command line option '-Wno-constant-logical-operand'
cc1: warning: unrecognized command line option '-Wno-parentheses-equality'
cc1: warning: unrecognized command line option '-Wno-tautological-compare'
Makefile:241: recipe for target 'stacks.o' failed
make: *** [stacks.o] Error 1

make failed, exit code 2

Gem files will remain installed in /usr/local/bundle/gems/scout_apm-3.0.0.pre25
for inspection.
Results logged to
/usr/local/bundle/extensions/x86_64-linux/2.4.0/scout_apm-3.0.0.pre25/gem_make.out