Opened PR for this: #297

from nio4r.

I've run into the same problem while trying to install nio4r for Ruby 2.7.4 on M1 macs.

@tsimnujhawj Did your fix actually address the installation issue?

I would have expected the failure to come from the error at this line:

selector.c:301:26: error: incompatible function pointer types passing 'VALUE (*)(VALUE *)' (aka 'unsigned long (*)(unsigned long *)') to parameter of type 'VALUE (*)(VALUE)' (aka 'unsigned long (*)(unsigned long)') [-Wincompatible-function-pointer-types]
        return rb_ensure(func, (VALUE)args, NIO_Selector_unlock, self);
                         ^~~~
/Users/<USER>/.rbenv/versions/3.0.6/include/ruby-3.0.0/ruby/internal/iterator.h:53:24: note: passing argument to parameter here
VALUE rb_ensure(VALUE(*)(VALUE),VALUE,VALUE(*)(VALUE),VALUE);
                       ^
1 error generated.

Warnings should not cause the compilation to fail.

I have tried to set the C compiler flag as a workaround, like:

bundle config build.nio4r -- --with-cflags="-std=c11"

But that didn't fix it. Any pointers as to how this can be fixed or worked around?

from nio4r.

Looks like this error has showed up before: #290

Turns out bundler is trying to install v2.5.8, while this bug was already fixed in v2.5.9. Please ignore my message above in that case :)

from nio4r.

the same
~/beef $ gem install nio4r -v '2.5.7' --source 'https://rubygems.org/'
Building native extensions. This could take a while...
ERROR: Error installing nio4r:
ERROR: Failed to build gem native extension.

current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.2.0/gems/nio4r-2.5.7/ext/nio4r

/data/data/com.termux/files/usr/bin/ruby extconf.rb
checking for unistd.h... yes
checking for linux/aio_abi.h... yes
checking for linux/io_uring.h... yes
checking for sys/select.h... yes
checking for port_event_t in poll.h... no
checking for sys/epoll.h... yes
checking for sys/event.h... no
checking for port_event_t in port.h... no
checking for sys/resource.h... yes
creating Makefile

current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.2.0/gems/nio4r-2.5.7/ext/nio4r
make DESTDIR= sitearchdir=./.gem.20230914-22187-qozyu4 sitelibdir=./.gem.20230914-22187-qozyu4 clean

current directory: /data/data/com.termux/files/usr/lib/ruby/gems/3.2.0/gems/nio4r-2.5.7/ext/nio4r
make DESTDIR= sitearchdir=./.gem.20230914-22187-qozyu4 sitelibdir=./.gem.20230914-22187-qozyu4
compiling bytebuffer.c
bytebuffer.c:308:20: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
return INT2NUM(bytes_read);
~~~~~~~ ^~~~~~~~~~
bytebuffer.c:338:20: warning: implicit conversion loses integer precision: 'ssize_t' (aka 'long') to 'int' [-Wshorten-64-to-32]
return INT2NUM(bytes_written);
~~~~~~~ ^~~~~~~~~~~~~
2 warnings generated.
compiling monitor.c
monitor.c:185:40: warning: implicit conversion loses integer precision: 'VALUE' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
NIO_Monitor_update_interests(self, interest);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~
monitor.c:196:40: warning: implicit conversion loses integer precision: 'VALUE' (aka 'unsigned long') to 'int' [-Wshorten-64-to-32]
NIO_Monitor_update_interests(self, interest);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~~
2 warnings generated.
compiling nio4r_ext.c
In file included from nio4r_ext.c:6:
./../libev/ev.c:234:5: warning: 'EV_NO_THREADS' is not defined, evaluates to 0 [-Wundef]
#if EV_NO_THREADS
^
./../libev/ev.c:240:5: warning: 'EV_NO_SMP' is not defined, evaluates to 0 [-Wundef]
#if EV_NO_SMP
^
./../libev/ev.c:292:17: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && GLIBC == 2 && GLIBC_MINOR < 17

            ^

./../libev/ev.c:321:6: warning: '_POSIX_C_SOURCE' is not defined, evaluates to 0 [-Wundef]

if _POSIX_C_SOURCE >= 199309L

 ^

./../libev/ev.c:365:18: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 4))

             ^

./../libev/ev.c:365:36: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 4))

                               ^

./../libev/ev.c:381:18: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 7))

             ^

./../libev/ev.c:381:36: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 7))

                               ^

./../libev/ev.c:389:18: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 7))

             ^

./../libev/ev.c:389:36: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 7))

                               ^

./../libev/ev.c:397:18: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 8))

             ^

./../libev/ev.c:397:36: warning: 'GLIBC' is not defined, evaluates to 0 [-Wundef]

if __linux && (GLIBC > 2 || (GLIBC == 2 && GLIBC_MINOR >= 8))

                               ^

./../libev/ev.c:573:48: warning: '/' within block comment [-Wcomment]
/#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
^
./../libev/ev.c:691:7: warning: 'OPTIMIZE_SIZE' is not defined, evaluates to 0 [-Wundef]
#if OPTIMIZE_SIZE
^
./../libev/ev.c:699:5: warning: '__amd64' is not defined, evaluates to 0 [-Wundef]
#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
^
./../libev/ev.c:687:24: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:699:5: warning: 'amd64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:35: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:699:5: warning: '__x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:48: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:699:5: warning: 'x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:60: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:699:22: warning: '_M_AMD64' is not defined, evaluates to 0 [-Wundef]
#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
^
./../libev/ev.c:688:25: note: expanded from macro 'ECB_MSVC_AMD64'
#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
^
./../libev/ev.c:699:22: warning: '_M_X64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:688:37: note: expanded from macro 'ECB_MSVC_AMD64'
#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
^
./../libev/ev.c:739:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:751:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:766:5: warning: 'ECB_NO_THREADS' is not defined, evaluates to 0 [-Wundef]
#if ECB_NO_THREADS
^
./../libev/ev.c:770:5: warning: 'ECB_NO_SMP' is not defined, evaluates to 0 [-Wundef]
#if ECB_NO_SMP
^
./../libev/ev.c:775:5: warning: 'xlC' is not defined, evaluates to 0 [-Wundef]
#if xlC && ECB_CPP
^
./../libev/ev.c:779:13: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
#if 1400 <= _MSC_VER
^
./../libev/ev.c:786:9: warning: '__i386' is not defined, evaluates to 0 [-Wundef]
#if __i386 || i386
^
./../libev/ev.c:786:19: warning: 'i386' is not defined, evaluates to 0 [-Wundef]
#if __i386 || i386
^
./../libev/ev.c:790:11: warning: '__amd64' is not defined, evaluates to 0 [-Wundef]
#elif ECB_GCC_AMD64
^
./../libev/ev.c:687:24: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:790:11: warning: 'amd64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:35: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:790:11: warning: '__x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:48: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:790:11: warning: 'x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:60: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:794:11: warning: 'powerpc' is not defined, evaluates to 0 [-Wundef]
#elif powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:794:26: warning: 'ppc' is not defined, evaluates to 0 [-Wundef]
#elif powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:794:37: warning: 'powerpc64' is not defined, evaluates to 0 [-Wundef]
#elif powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:794:54: warning: 'ppc64' is not defined, evaluates to 0 [-Wundef]
#elif powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:924:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:981:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP11
^
./../libev/ev.c:735:20: note: expanded from macro 'ECB_CPP11'
#define ECB_CPP11 (__cplusplus >= 201103L)
^
./../libev/ev.c:989:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
#if _MSC_VER >= 1300
^
./../libev/ev.c:995:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
#if _MSC_VER >= 1500
^
./../libev/ev.c:1003:5: warning: '_MSC_VER' is not defined, evaluates to 0 [-Wundef]
#if _MSC_VER >= 1400
^
./../libev/ev.c:1192:26: warning: implicit conversion loses integer precision: 'uint64_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
~~~~~~~~~~~~~~~~^~
./../libev/ev.c:1054:49: note: expanded from macro 'ecb_popcount32'
#define ecb_popcount32(x) __builtin_popcount (x)
~~~~~~~~~~~~~~~~~~ ^
./../libev/ev.c:1213:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:1335:108: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
ecb_inline uint_fast32_t ecb_be_u32_to_host (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
~~~~~~~~~~~~~^~
./../libev/ev.c:1257:46: note: expanded from macro 'ecb_bswap32'
#define ecb_bswap32(x) __builtin_bswap32 (x)
~~~~~~~~~~~~~~~~~ ^
./../libev/ev.c:1339:108: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
ecb_inline uint_fast32_t ecb_le_u32_to_host (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
~~~~~~~~~~~~~^~
./../libev/ev.c:1257:46: note: expanded from macro 'ecb_bswap32'
#define ecb_bswap32(x) __builtin_bswap32 (x)
~~~~~~~~~~~~~~~~~ ^
./../libev/ev.c:1355:108: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
ecb_inline uint_fast32_t ecb_host_to_be_u32 (uint_fast32_t v) { return ecb_little_endian () ? ecb_bswap32 (v) : v; }
~~~~~~~~~~~~~^~
./../libev/ev.c:1257:46: note: expanded from macro 'ecb_bswap32'
#define ecb_bswap32(x) __builtin_bswap32 (x)
~~~~~~~~~~~~~~~~~ ^
./../libev/ev.c:1359:108: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32]
ecb_inline uint_fast32_t ecb_host_to_le_u32 (uint_fast32_t v) { return ecb_big_endian () ? ecb_bswap32 (v) : v; }
~~~~~~~~~~~~~^~
./../libev/ev.c:1257:46: note: expanded from macro 'ecb_bswap32'
#define ecb_bswap32(x) __builtin_bswap32 (x)
~~~~~~~~~~~~~~~~~ ^
./../libev/ev.c:1367:87: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'uint32_t' (aka 'unsigned int') [-Wshorten-64-to-32]
ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); }
~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1371:87: warning: implicit conversion loses integer precision: 'uint_fast32_t' (aka 'unsigned long') to 'uint32_t' (aka 'unsigned int') [-Wshorten-64-to-32]
ecb_inline void ecb_poke_le_u32_u (void ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); }
~~~~~~~~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1374:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:1409:5: warning: '__cplusplus' is not defined, evaluates to 0 [-Wundef]
#if ECB_CPP
^
./../libev/ev.c:734:20: note: expanded from macro 'ECB_CPP'
#define ECB_CPP (__cplusplus+0)
^
./../libev/ev.c:1425:5: warning: 'ecb_cplusplus_does_not_suck' is not defined, evaluates to 0 [-Wundef]
#if ecb_cplusplus_does_not_suck
^
./../libev/ev.c:1540:8: warning: '__i386' is not defined, evaluates to 0 [-Wundef]
|| __i386 || i386
^
./../libev/ev.c:1540:18: warning: 'i386' is not defined, evaluates to 0 [-Wundef]
|| __i386 || i386
^
./../libev/ev.c:1541:8: warning: '__amd64' is not defined, evaluates to 0 [-Wundef]
|| ECB_GCC_AMD64
^
./../libev/ev.c:687:24: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:1541:8: warning: 'amd64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:35: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:1541:8: warning: '__x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:48: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:1541:8: warning: 'x86_64' is not defined, evaluates to 0 [-Wundef]
./../libev/ev.c:687:60: note: expanded from macro 'ECB_GCC_AMD64'
#define ECB_GCC_AMD64 (__amd64 || amd64 || __x86_64 || x86_64)
^
./../libev/ev.c:1542:8: warning: 'powerpc' is not defined, evaluates to 0 [-Wundef]
|| powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:1542:23: warning: 'ppc' is not defined, evaluates to 0 [-Wundef]
|| powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:1542:34: warning: 'powerpc64' is not defined, evaluates to 0 [-Wundef]
|| powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:1542:51: warning: 'ppc64' is not defined, evaluates to 0 [-Wundef]
|| powerpc || ppc || powerpc64 || ppc64
^
./../libev/ev.c:1510:13: warning: comparison of integers of different signs: 'unsigned int' and 'int' [-Wsign-compare]
if (e < (14 - 24)) / might not be sharp, but is good enough */
~ ^ ~~~~~~~
./../libev/ev.c:1746:5: warning: 'ECB_MEMORY_FENCE_NEEDS_PTHREADS' is not defined, evaluates to 0 [-Wundef]
#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
^
./../libev/ev.c:1786:28: warning: 'ECB_AMD64' is not defined, evaluates to 0 [-Wundef]
#if GNUC && __linux && ECB_AMD64 && !EV_FEATURE_CODE
^
./../libev/ev.c:1976:5: warning: 'EV_AVOID_STDIO' is not defined, evaluates to 0 [-Wundef]
#if EV_AVOID_STDIO
^
./../libev/ev.c:2005:5: warning: 'EV_AVOID_STDIO' is not defined, evaluates to 0 [-Wundef]
#if EV_AVOID_STDIO
^
./../libev/ev.c:2050:5: warning: 'EV_AVOID_STDIO' is not defined, evaluates to 0 [-Wundef]
#if EV_AVOID_STDIO
^
./../libev/ev.c:2080:5: warning: 'EV_SELECT_IS_WINSOCKET' is not defined, evaluates to 0 [-Wundef]
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
^
./../libev/ev.c:2080:31: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
^
./../libev/ev.c:2083:5: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP
^
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:2130:
./../libev/ev_vars.h:83:22: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_SELECT || EV_GENWRAP
^
./../libev/ev_vars.h:150:22: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_KQUEUE || EV_GENWRAP
^
./../libev/ev_vars.h:159:20: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_PORT || EV_GENWRAP
^
./../libev/ev_vars.h:164:5: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP || EV_GENWRAP
^
./../libev/ev_vars.h:164:20: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP || EV_GENWRAP
^
./../libev/ev_vars.h:216:23: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_INOTIFY || EV_GENWRAP
^
./../libev/ev_vars.h:224:24: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_SIGNALFD || EV_GENWRAP
^
./../libev/ev_vars.h:230:23: warning: 'EV_GENWRAP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_TIMERFD || EV_GENWRAP
^
In file included from nio4r_ext.c:6:
./../libev/ev.c:2136:31: warning: 'extern' variable has an initializer [-Wextern-initializer]
EV_API_DECL struct ev_loop ev_default_loop_ptr = 0; / needs to be initialised to make it a definition despite extern */
^
./../libev/ev.c:2249:19: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare]
if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:2402:5: warning: 'EV_SELECT_IS_WINSOCKET' is not defined, evaluates to 0 [-Wundef]
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
^
./../libev/ev.c:2402:31: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
^
./../libev/ev.c:2619:18: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
k = minpos - heap;
~ ~~~~~~~^~~~~~
./../libev/ev.c:3073:5: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP
^
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3086:
./../libev/ev_linuxaio.c:125:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
return ev_syscall2 (SYS_io_setup, nr_events, ctx_idp);

./../libev/ev.c:1826:57: note: expanded from macro 'ev_syscall2'
#define ev_syscall2(nr,arg1,arg2)                     syscall (nr, arg1, arg2)
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~                                                In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3086:
./../libev/ev_linuxaio.c:132:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]       return ev_syscall1 (SYS_io_destroy, ctx_id);                    ~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                   ./../libev/ev.c:1825:57: note: expanded from macro 'ev_syscall1'
#define ev_syscall1(nr,arg1)                          syscall (nr, arg1)
                                                      ^~~~~~~~~~~~~~~~~~                                                      In file included from nio4r_ext.c:6:                            In file included from ./../libev/ev.c:3086:                     ./../libev/ev_linuxaio.c:139:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]       return ev_syscall3 (SYS_io_submit, ctx_id, nr, cbp);
~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1827:57: note: expanded from macro 'ev_syscall3'
#define ev_syscall3(nr,arg1,arg2,arg3)                syscall (nr, arg1, arg2, arg3)
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                                          In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3086:                     ./../libev/ev_linuxaio.c:146:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
return ev_syscall3 (SYS_io_cancel, ctx_id, cbp, result);        ~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~       ./../libev/ev.c:1827:57: note: expanded from macro 'ev_syscall3'
#define ev_syscall3(nr,arg1,arg2,arg3)                syscall (nr, arg1, arg2, arg3)                                                                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3086:
./../libev/ev_linuxaio.c:153:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
return ev_syscall5 (SYS_io_getevents, ctx_id, min_nr, nr, events, timeout);
~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1829:57: note: expanded from macro 'ev_syscall5'
#define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5)      syscall (nr, arg1, arg2, arg3, arg4, arg5)
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3086:
./../libev/ev_linuxaio.c:310:26: warning: implicit conversion loses integer precision: '__s64' (aka 'long long') to 'int' [-Wshorten-64-to-32]
    int res      = ev->res;
        ~~~        ~~~~^~~
./../libev/ev_linuxaio.c:483:9: warning: add explicit braces to avoid dangling else [-Wdangling-else]
      else if (errno == EAGAIN)
      ^
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3089:
./../libev/ev_iouring.c:205:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
return ev_syscall2 (SYS_io_uring_setup, entries, params);
~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1826:57: note: expanded from macro 'ev_syscall2'
#define ev_syscall2(nr,arg1,arg2)                     syscall (nr, arg1, arg2)
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3089:
./../libev/ev_iouring.c:212:10: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
return ev_syscall6 (SYS_io_uring_enter, fd, to_submit, min_complete, flags, sig, sigsz);
~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./../libev/ev.c:1830:57: note: expanded from macro 'ev_syscall6'
#define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from nio4r_ext.c:6:
In file included from ./../libev/ev.c:3089:
./../libev/ev_iouring.c:298:31: warning: '/*' within block comment [-Wcomment]
/*ECB_MEMORY_FENCE_RELEASE; /* for the time being we assume this is not needed */
                            ^
./../libev/ev_iouring.c:293:22: warning: implicit conversion loses integer precision: 'long' to 'unsigned int' [-Wshorten-64-to-32]
unsigned idx = sqe - EV_SQES;
         ~~~   ~~~~^~~~~~~~~
./../libev/ev_iouring.c:300:1: warning: non-void function does not return a value [-Wreturn-type]                               }
^
./../libev/ev_iouring.c:331:1: warning: non-void function does not return a value [-Wreturn-type]
}
^                                                               ./../libev/ev_iouring.c:359:5: warning: 'TODO' is not defined, evaluates to 0 [-Wundef]
#if TODO
  ^
In file included from nio4r_ext.c:6:
./../libev/ev.c:3318:5: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP
  ^
./../libev/ev.c:3409:5: warning: 'EV_USE_IOCP' is not defined, evaluates to 0 [-Wundef]
#if EV_USE_IOCP
  ^
./../libev/ev.c:4417:34: warning: '&' within '|' [-Wbitwise-op-parentheses]
fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
                     ~~~~~~~~~~^~~~~~~~~~~~~ ~
./../libev/ev.c:4417:34: note: place parentheses around the '&' expression to silence this warning
fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
                               ^
                     (                      )
102 warnings generated.
compiling selector.c
selector.c:301:26: error: incompatible function pointer types passing 'VALUE (*)(VALUE *)' (aka 'unsigned long (*)(unsigned long *)') to parameter of type 'VALUE (*)(VALUE)' (aka 'unsigned long (*)(unsigned long)') [-Wincompatible-function-pointer-types]
      return rb_ensure(func, (VALUE)args, NIO_Selector_unlock, self);
                       ^~~~
/data/data/com.termux/files/usr/include/ruby-3.2.0/ruby/internal/iterator.h:425:25: note: passing argument to parameter 'b_proc' here
VALUE rb_ensure(VALUE (*b_proc)(VALUE), VALUE data1, VALUE (*e_proc)(VALUE), VALUE data2);
                      ^
1 error generated.
make: *** [Makefile:248: selector.o] Error 1

make failed, exit code 2

Gem files will remain installed in /data/data/com.termux/files/usr/lib/ruby/gems/3.2.0/gems/nio4r-2.5.7 for inspection.
Results logged to /data/data/com.termux/files/usr/lib/ruby/gems/3.2.0/extensions/aarch64-linux-android/3.2.0/nio4r-2.5.7/gem_make.out

from nio4r.

@Vladislav25565 why are you deliberately installing an old version?

from nio4r.

@Vladislav25565 You're installing version 2.5.7, please install the latest version:
gem install nio4r -v '2.5.9'

If your other gems depend on nio4r version 2.5.7, you might consider upgrading those other gems first.

I will also add that switching my ruby version manager from rbenv to asdf has resolved many of my gem compiling issues on my M1 machine.

from nio4r.

Please try using v2.6.1 it should fix the issue.

from nio4r.