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@dequis I’ll indeed try to contact directly upstream maintainers. Thank you for your help!

@pmderodat irc.mozilla.org #rr You might want to ask there or file an issue in the github issue tracker, I personally have no idea. At least the mentioned -Werror issue should be fixed in git, though. Downgrading gcc-multilib and gcc-libs-multilib to 5.x may also help. FWIW, here's my built package: http://dequis.org/rr-4.2.0-1-x86_64.pkg.tar.xz There's also a prebuilt .tar.gz available in https://github.com/mozilla/rr/releases/tag/4.2.0

@dequis @SilverOne Thanks for your answers! Yes, same problem in the rr-git package as well. @dequis: where did you get the info about it fixed upstream?

@dequis I get the same problem in the rr-git package.

@pmderodat Apparently this stuff is fixed in the master branch, try the rr-git package.

Hello, I just tried to build this package and get the following error: [ 42%] Building CXX object CMakeFiles/rr.dir/src/record_signal.cc.o In file included from /home/pmderodat/misc/rr/src/rr-4.2.0/src/AutoRemoteSyscalls.h:10:0, from /home/pmderodat/misc/rr/src/rr-4.2.0/src/record_signal.cc:18: /home/pmderodat/misc/rr/src/rr-4.2.0/src/Registers.h: In instantiation of ‘void Registers::set_arg(T) [with int Index = 3; T = std::nullptr_t]’: /home/pmderodat/misc/rr/src/rr-4.2.0/src/AutoRemoteSyscalls.h:224:30: recursively required from ‘void AutoRemoteSyscalls::syscall_helper(int, Registers&, T, Rest ...) [with int Index = 2; T = long unsigned int; Rest = {std::nullptr_t, long unsigned int}]’ /home/pmderodat/misc/rr/src/rr-4.2.0/src/AutoRemoteSyscalls.h:224:30: required from ‘void AutoRemoteSyscalls::syscall_helper(int, Registers&, T, Rest ...) [with int Index = 1; T = int; Rest = {long unsigned int, std::nullptr_t, long unsigned int}]’ /home/pmderodat/misc/rr/src/rr-4.2.0/src/AutoRemoteSyscalls.h:155:5: required from ‘long int AutoRemoteSyscalls::infallible_syscall(int, Rest ...) [with Rest = {int, long unsigned int, std::nullptr_t, long unsigned int}]’ /home/pmderodat/misc/rr/src/rr-4.2.0/src/record_signal.cc:54:67: required from here /home/pmderodat/misc/rr/src/rr-4.2.0/src/Registers.h:238:51: error: parameter ‘value’ set but not used [-Werror=unused-but-set-paramete] template <int Index, typename T> void set_arg(T value) { ^~~~~ cc1plus: all warnings being treated as errors CMakeFiles/rr.dir/build.make:846: recipe for target 'CMakeFiles/rr.dir/src/record_signal.cc.o' failed make[2]: *** [CMakeFiles/rr.dir/src/record_signal.cc.o] Error 1 CMakeFiles/Makefile2:11117: recipe for target 'CMakeFiles/rr.dir/all' failed make[1]: *** [CMakeFiles/rr.dir/all] Error 2 Makefile:160: recipe for target 'all' failed make: *** [all] Error 2 ==> ERROR: A failure occurred in build(). Aborting... I’m surprised that rr uses -Werror for production builds as this may break the build with toolchain upgrades. Actually even if I patch the root CMakeLists.txt file to remove the -Werror flag, I get a build error for missing math.h include: [ 50%] Building CXX object CMakeFiles/rr.dir/src/Scheduler.cc.o /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc: In function ‘void sleep_time(double)’: /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc:262:30: error: ‘floor’ was not declared in this scope ts.tv_sec = (time_t)floor(t); ^ /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc: In member function ‘void Scheduler::maybe_reset_high_priority_only_intervals(double)’: /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc:293:65: error: ‘pow’ was not declared in this scope pow(high_priority_only_duration_step_factor, duration_step); ^ /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc: In member function ‘bool Scheduler::in_high_priority_only_interval(double)’: /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc:313:56: error: ‘fmod’ was not declared in this scope high_priority_only_intervals_period); ^ /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc: In member function ‘double Scheduler::interrupt_after_elapsed_time() const’: /home/pmderodat/misc/rr/src/rr-4.2.0/src/Scheduler.cc:484:53: error: ‘floor’ was not declared in this scope high_priority_only_intervals_period) + ^ CMakeFiles/rr.dir/build.make:1038: recipe for target 'CMakeFiles/rr.dir/src/Scheduler.cc.o' failed Can anyone reproduce these?

The dependencies libpfm4 and libdisasm are not required, the python2-pexpect dependency should be under checkdepends and there should a check() function that runs the tests. I've updated your pkgbuild here: https://gist.github.com/SShrike/e9670f8d1e0994b70b61

Done. Also updated to 4.0.1. (I actually had the /usr thing staged locally and forgot to commit it. Welp.)

Please install rr to /usr instead of /usr/local cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr .. And add a dependency on gcc-multilib.

@vale have you tried installing gcc-multilib?