$ gem install io-event
Building native extensions. This could take a while...
ERROR: Error installing io-event: ERROR: Failed to build gem native extension.
current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.4.0/gems/io-event-1.14.2/ext
/data/data/com.termux/files/usr/bin/ruby extconf.rb
checking for whether -Wall is accepted as CFLAGS... no checking for whether -Wno-unknown-pragmas is accepted as CFLAGS... no
checking for whether -std=c99 is accepted as CFLAGS... no checking for rb_ext_ractor_safe()... yes
checking for &rb_fiber_transfer()... yes
checking for -luring... no
checking for sys/epoll.h... yes checking for sys/event.h... no
checking for sys/wait.h... yes
checking for sys/eventfd.h... yes checking for rb_io_descriptor()... yes
checking for &rb_process_status_wait()... yes
checking for rb_fiber_current()... yes
checking for &rb_fiber_raise()... yes
checking for epoll_pwait2()... yes
checking for ruby/io/buffer.h... yes
checking for rb_fiber_scheduler_blocking_operation_extract()... no
creating extconf.h
creating Makefile
current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.4.0/gems/io-event-1.14.2/ext
make -j9 DESTDIR\= sitearchdir\=./.gem.20260125-28006-d7jozu sitelibdir\=./.gem.20260125-28006-d7jozu clean
current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.4.0/gems/io-event-1.14.2/ext
make -j9 DESTDIR\= sitearchdir\=./.gem.20260125-28006-d7jozu sitelibdir\=./.gem.20260125-28006-d7jozu
compiling ./io/event/event.c
compiling ./io/event/time.c
compiling ./io/event/fiber.c
compiling ./io/event/selector/selector.c
compiling ./io/event/selector/epoll.c
compiling ./io/event/interrupt.c
In file included from ./io/event/time.c:4:
In file included from ./io/event/time.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
In file included from ./io/event/event.c:4:
In file included from ./io/event/event.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
In file included from ./io/event/fiber.c:4:
In file included from ./io/event/fiber.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
In file included from ./io/event/selector/epoll.c:4:
In file included from ./io/event/selector/epoll.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
1 warning generated.
1 warning generated.
1 warning generated.
In file included from ./io/event/selector/selector.c:4:
In file included from ./io/event/selector/selector.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
In file included from ./io/event/selector/epoll.c:13:
./io/event/selector/pidfd.c:20:9: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
20 | return syscall(__NR_pidfd_open, pid, flags);
| ~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./io/event/selector/epoll.c:835:34: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
835 | return (timeout->tv_sec * 1000) + (timeout->tv_nsec / 1000000);
| ~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./io/event/selector/epoll.c:852:21: error: call to undeclared function 'epoll_pwait2'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
852 | arguments->count = epoll_pwait2(arguments->selector->descriptor, arguments->events, EPOLL_MAX_EVENTS, arguments->timeout, NULL);
| ^
./io/event/selector/epoll.c:852:21: note: did you mean 'epoll_pwait'?
/data/data/com.termux/files/usr/include/sys/epoll.h:84:5: note: 'epoll_pwait' declared here
84 | int epoll_pwait(int __epoll_fd, struct epoll_event* _Nonnull __events, int __event_count, int __timeout_ms, const sigset_t* _Nullable __mask);
| ^
In file included from ./io/event/interrupt.c:4:
In file included from ./io/event/interrupt.h:6:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby.h:38:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/ruby.h:28:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic.h:24:
In file included from /data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/arithmetic/char.h:29:
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rstring.h:398:24: warning: default initialization of an object of type 'struct RString' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
398 | struct RString retval;
| ^
/data/data/com.termux/files/usr/include/ruby-3.4.0/ruby/internal/core/rbasic.h:86:17: note: member 'klass' declared 'const' here
86 | const VALUE klass;
| ^
3 warnings and 1 error generated.
make: *** [Makefile:250: epoll.o] Error 1
make: *** Waiting for unfinished jobs....
1 warning generated.
1 warning generated.
make failed, exit code 2
Gem files will remain installed in /data/data/com.termux/files/usr/lib/ruby/gems/3.4.0/gems/io-event-1.14.2 for inspection.
Results logged to /data/data/com.termux/files/usr/lib/ruby/gems/3.4.0/extensions/aarch64-linux-android/3.4.0/io-event-1.14.2/gem_make.out
$ clang --version
clang version 21.1.8
Target: aarch64-unknown-linux-android24
Thread model: posix
InstalledDir: /data/data/com.termux/files/usr/bin
$ ruby --version
ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [aarch64-linux-android]
Termux Variables:
TERMUX_API_VERSION=0.53.0
TERMUX_APK_RELEASE=F_DROID
TERMUX_APP_PACKAGE_MANAGER=apt
TERMUX_APP_PID=32411
TERMUX_APP__DATA_DIR=/data/user/0/com.termux
TERMUX_APP__LEGACY_DATA_DIR=/data/data/com.termux
TERMUX_APP__SE_FILE_CONTEXT=u:object_r:app_data_file:s0:c197,c256,c512,c768
TERMUX_APP__SE_INFO=default:targetSdkVersion=28:complete
TERMUX_IS_DEBUGGABLE_BUILD=0
TERMUX_MAIN_PACKAGE_FORMAT=debian
TERMUX_VERSION=0.118.3
TERMUX__HOME=/data/data/com.termux/files/home
TERMUX__PREFIX=/data/data/com.termux/files/usr
TERMUX__ROOTFS_DIR=/data/data/com.termux/files
TERMUX__SE_PROCESS_CONTEXT=u:r:untrusted_app_27:s0:c197,c256,c512,c768
TERMUX__USER_ID=0
Packages CPU architecture:
aarch64
Subscribed repositories:
# sources.list
deb https://termux.cdn.lumito.net/termux-main stable main
# root-repo (sources.list.d/root.list)
deb https://termux.cdn.lumito.net/termux-root root stable
# x11-repo (sources.list.d/x11.list)
deb https://termux.cdn.lumito.net/termux-x11 x11 main
Updatable packages:
command-not-found/stable 3.2-14 aarch64 [upgradable from: 3.2-13]
harfbuzz/stable 12.3.2 aarch64 [upgradable from: 12.3.1]
qpdf/stable 12.3.2 aarch64 [upgradable from: 12.3.1]
svt-av1/stable 4.0.0 aarch64 [upgradable from: 3.1.2]
termux-tools version:
1.45.0
Android version:
16
Kernel build information:
Linux localhost 6.1.155-ga09a435bbfee #1 SMP PREEMPT Thu Nov 6 12:14:10 CET 2025 aarch64 Android
Device manufacturer:
Fairphone
Device model:
Fairphone 6
Supported ABIs:
SUPPORTED_ABIS: arm64-v8a
SUPPORTED_32_BIT_ABIS:
SUPPORTED_64_BIT_ABIS: arm64-v8a
LD Variables:
LD_LIBRARY_PATH=
LD_PRELOAD=/data/data/com.termux/files/usr/lib/libtermux-exec-ld-preload.so
Installed termux plugins:
com.termux.api versionCode:1002
com.termux.gui versionCode:7
