* [ruby-core:124848] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2
@ 2026-02-18 19:52 mhashizume (Michael Hashizume) via ruby-core
2026-02-19 0:29 ` [ruby-core:124849] " nobu (Nobuyoshi Nakada) via ruby-core
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: mhashizume (Michael Hashizume) via ruby-core @ 2026-02-18 19:52 UTC (permalink / raw)
To: ruby-core; +Cc: mhashizume (Michael Hashizume)
Issue #21917 has been reported by mhashizume (Michael Hashizume).
----------------------------------------
Bug #21917: Unable to build 4.0.1 on AIX 7.2
https://bugs.ruby-lang.org/issues/21917
* Author: mhashizume (Michael Hashizume)
* Status: Open
* ruby -v: 4.0.1
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN
----------------------------------------
I'm attempting to build Ruby 4.0.1 on AIX 7.2. We have had successful builds of previous versions of Ruby on this platform, but are starting to see an issue when using miniruby to build Ruby:
``` shell
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./powerpc64-aix7.2.0.0-fake ./tool/rbinstall.rb --make="gmake" --dest-dir="" --extout=".ext" --ext-build-dir="./ext" --mflags="-j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --make-flags=" -j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="man" --install=all --exclude=doc
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImplementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
I'm not sure where the NotImplementedError is coming from, and when looking at the `truss` output from miniruby, I see a ENOTTY when miniruby attempts to load monitor.so:
```shell
accessx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0, 0) = 0
statx("/", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFA680, 176, 011) = 0
__ksetjmp(0x0000000110019F88, 0x09000000026845A8, 2, 0x000000011001A1D8, 0x0FFFFFFFFFFFB790, 0x0000000022242202, 0x000000011011A658, 0x09000
00000260348) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFB800, 176, 0) = 0
kioctl(2, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImpl
ementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
monitor.so is present in the path that miniruby is looking for it.
Any pointers on where to start debugging this further or what changes in more recent versions of Ruby could have caused this would be greatly appreciated.
Thank you!
--
https://bugs.ruby-lang.org/
______________________________________________
ruby-core mailing list -- ruby-core@ml.ruby-lang.org
To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/
^ permalink raw reply [flat|nested] 4+ messages in thread
* [ruby-core:124849] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2
2026-02-18 19:52 [ruby-core:124848] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2 mhashizume (Michael Hashizume) via ruby-core
@ 2026-02-19 0:29 ` nobu (Nobuyoshi Nakada) via ruby-core
2026-02-19 2:08 ` [ruby-core:124850] " nobu (Nobuyoshi Nakada) via ruby-core
2026-02-19 22:20 ` [ruby-core:124852] " mhashizume (Michael Hashizume) via ruby-core
2 siblings, 0 replies; 4+ messages in thread
From: nobu (Nobuyoshi Nakada) via ruby-core @ 2026-02-19 0:29 UTC (permalink / raw)
To: ruby-core; +Cc: nobu (Nobuyoshi Nakada)
Issue #21917 has been updated by nobu (Nobuyoshi Nakada).
Probably this may help:
```diff
diff --git a/dln.c b/dln.c
index 2549f031835..01dfccd0534 100644
--- a/dln.c
+++ b/dln.c
@@ -506,6 +506,7 @@ static void *
dln_load_and_init(const char *file, const char *init_fct_name)
{
#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
+# define DLN_IMPLEMENTED 1
void *handle = dln_open(file);
#ifdef RUBY_DLN_CHECK_ABI
@@ -523,6 +524,7 @@ dln_load_and_init(const char *file, const char *init_fct_name)
return handle;
#elif defined(_AIX)
+# define DLN_IMPLEMENTED 1
{
void (*init_fct)(void);
@@ -547,7 +549,7 @@ dln_load_and_init(const char *file, const char *init_fct_name)
void *
dln_load(const char *file)
{
-#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
+#ifdef DLN_IMPLEMENTED
char *init_fct_name;
init_funcname(&init_fct_name, file);
return dln_load_and_init(file, init_fct_name);
@@ -560,7 +562,7 @@ dln_load(const char *file)
void *
dln_load_feature(const char *file, const char *fname)
{
-#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
+#ifdef DLN_IMPLEMENTED
char *init_fct_name;
init_funcname(&init_fct_name, fname);
return dln_load_and_init(file, init_fct_name);
```
----------------------------------------
Bug #21917: Unable to build 4.0.1 on AIX 7.2
https://bugs.ruby-lang.org/issues/21917#change-116503
* Author: mhashizume (Michael Hashizume)
* Status: Open
* ruby -v: 4.0.1
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN
----------------------------------------
I'm attempting to build Ruby 4.0.1 on AIX 7.2. We have had successful builds of previous versions of Ruby on this platform, but are starting to see an issue when using miniruby to build Ruby:
``` shell
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./powerpc64-aix7.2.0.0-fake ./tool/rbinstall.rb --make="gmake" --dest-dir="" --extout=".ext" --ext-build-dir="./ext" --mflags="-j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --make-flags=" -j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="man" --install=all --exclude=doc
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImplementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
I'm not sure where the NotImplementedError is coming from, and when looking at the `truss` output from miniruby, I see a ENOTTY when miniruby attempts to load monitor.so:
```shell
accessx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0, 0) = 0
statx("/", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFA680, 176, 011) = 0
__ksetjmp(0x0000000110019F88, 0x09000000026845A8, 2, 0x000000011001A1D8, 0x0FFFFFFFFFFFB790, 0x0000000022242202, 0x000000011011A658, 0x09000
00000260348) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFB800, 176, 0) = 0
kioctl(2, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImpl
ementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
monitor.so is present in the path that miniruby is looking for it.
Any pointers on where to start debugging this further or what changes in more recent versions of Ruby could have caused this would be greatly appreciated.
Thank you!
--
https://bugs.ruby-lang.org/
______________________________________________
ruby-core mailing list -- ruby-core@ml.ruby-lang.org
To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [ruby-core:124850] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2
2026-02-18 19:52 [ruby-core:124848] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2 mhashizume (Michael Hashizume) via ruby-core
2026-02-19 0:29 ` [ruby-core:124849] " nobu (Nobuyoshi Nakada) via ruby-core
@ 2026-02-19 2:08 ` nobu (Nobuyoshi Nakada) via ruby-core
2026-02-19 22:20 ` [ruby-core:124852] " mhashizume (Michael Hashizume) via ruby-core
2 siblings, 0 replies; 4+ messages in thread
From: nobu (Nobuyoshi Nakada) via ruby-core @ 2026-02-19 2:08 UTC (permalink / raw)
To: ruby-core; +Cc: nobu (Nobuyoshi Nakada)
Issue #21917 has been updated by nobu (Nobuyoshi Nakada).
Backport changed from 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN to 3.2: DONTNEED, 3.3: DONTNEED, 3.4: DONTNEED, 4.0: REQUIRED
Or, more simply:
```diff
diff --git a/dln.c b/dln.c
index 2549f031835..3725b95fbb7 100644
--- a/dln.c
+++ b/dln.c
@@ -89,7 +89,7 @@ dln_loaderror(const char *format, ...)
}
#endif
-#if defined(HAVE_DLOPEN) && !defined(_AIX) && !defined(_UNICOSMP)
+#if defined(HAVE_DLOPEN) && !defined(_UNICOSMP)
/* dynamic load with dlopen() */
# define USE_DLN_DLOPEN
#endif
```
----------------------------------------
Bug #21917: Unable to build 4.0.1 on AIX 7.2
https://bugs.ruby-lang.org/issues/21917#change-116504
* Author: mhashizume (Michael Hashizume)
* Status: Open
* ruby -v: 4.0.1
* Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: DONTNEED, 4.0: REQUIRED
----------------------------------------
I'm attempting to build Ruby 4.0.1 on AIX 7.2. We have had successful builds of previous versions of Ruby on this platform, but are starting to see an issue when using miniruby to build Ruby:
``` shell
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./powerpc64-aix7.2.0.0-fake ./tool/rbinstall.rb --make="gmake" --dest-dir="" --extout=".ext" --ext-build-dir="./ext" --mflags="-j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --make-flags=" -j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="man" --install=all --exclude=doc
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImplementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
I'm not sure where the NotImplementedError is coming from, and when looking at the `truss` output from miniruby, I see a ENOTTY when miniruby attempts to load monitor.so:
```shell
accessx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0, 0) = 0
statx("/", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFA680, 176, 011) = 0
__ksetjmp(0x0000000110019F88, 0x09000000026845A8, 2, 0x000000011001A1D8, 0x0FFFFFFFFFFFB790, 0x0000000022242202, 0x000000011011A658, 0x09000
00000260348) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFB800, 176, 0) = 0
kioctl(2, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImpl
ementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
monitor.so is present in the path that miniruby is looking for it.
Any pointers on where to start debugging this further or what changes in more recent versions of Ruby could have caused this would be greatly appreciated.
Thank you!
--
https://bugs.ruby-lang.org/
______________________________________________
ruby-core mailing list -- ruby-core@ml.ruby-lang.org
To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [ruby-core:124852] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2
2026-02-18 19:52 [ruby-core:124848] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2 mhashizume (Michael Hashizume) via ruby-core
2026-02-19 0:29 ` [ruby-core:124849] " nobu (Nobuyoshi Nakada) via ruby-core
2026-02-19 2:08 ` [ruby-core:124850] " nobu (Nobuyoshi Nakada) via ruby-core
@ 2026-02-19 22:20 ` mhashizume (Michael Hashizume) via ruby-core
2 siblings, 0 replies; 4+ messages in thread
From: mhashizume (Michael Hashizume) via ruby-core @ 2026-02-19 22:20 UTC (permalink / raw)
To: ruby-core; +Cc: mhashizume (Michael Hashizume)
Issue #21917 has been updated by mhashizume (Michael Hashizume).
Thanks for the quick reply. Your second, more simple patch in https://bugs.ruby-lang.org/issues/21917#note-2 worked to resolve my build issue.
I also tried your commit 361644c0cce3235e9cc6724994c6b5711deb10b8 but the build fails with a different issue:
```shell
compiling strscan.c
installing default strscan libraries
strscan.c:621:1: error: static declaration of 'rb_reg_onig_match' follows non-static declaration
621 | rb_reg_onig_match(VALUE re, VALUE str,
| ^~~~~~~~~~~~~~~~~
In file included from strscan.c:12:
../.././include/ruby/re.h:149:14: note: previous declaration of 'rb_reg_onig_match' was here
149 | OnigPosition rb_reg_onig_match(VALUE re, VALUE str,
| ^~~~~~~~~~~~~~~~~
gmake[3]: Leaving directory '/var/tmp/tmp.DXpB2u0vTN/ruby-4.0.1/ext/strscan'
gmake[3]: *** [Makefile:269: strscan.o] Error 1
gmake[2]: *** [exts.mk:322: ext/strscan/all] Error 2
gmake[2]: *** Waiting for unfinished jobs....
linking shared-object stringio.so
gmake[3]: Leaving directory '/var/tmp/tmp.DXpB2u0vTN/ruby-4.0.1/ext/stringio'
linking shared-object ripper.so
```
----------------------------------------
Bug #21917: Unable to build 4.0.1 on AIX 7.2
https://bugs.ruby-lang.org/issues/21917#change-116506
* Author: mhashizume (Michael Hashizume)
* Status: Closed
* ruby -v: 4.0.1
* Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: DONTNEED, 4.0: REQUIRED
----------------------------------------
I'm attempting to build Ruby 4.0.1 on AIX 7.2. We have had successful builds of previous versions of Ruby on this platform, but are starting to see an issue when using miniruby to build Ruby:
``` shell
./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -- --disable-gems -r./powerpc64-aix7.2.0.0-fake ./tool/rbinstall.rb --make="gmake" --dest-dir="" --extout=".ext" --ext-build-dir="./ext" --mflags="-j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --make-flags=" -j3 --jobserver-auth=fifo:/tmp//GMfifo9306586" --data-mode=0644 --prog-mode=0755 --installed-list .installed.list --mantype="man" --install=all --exclude=doc
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImplementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
I'm not sure where the NotImplementedError is coming from, and when looking at the `truss` output from miniruby, I see a ENOTTY when miniruby attempts to load monitor.so:
```shell
accessx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0, 0) = 0
statx("/", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0", 0x0FFFFFFFFFFFA680, 176, 011) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFA680, 176, 011) = 0
__ksetjmp(0x0000000110019F88, 0x09000000026845A8, 2, 0x000000011001A1D8, 0x0FFFFFFFFFFFB790, 0x0000000022242202, 0x000000011011A658, 0x09000
00000260348) = 0
statx("/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/powerpc64-aix7.2.0.0/monitor.so", 0x0FFFFFFFFFFFB800, 176, 0) = 0
kioctl(2, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
/var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in 'Kernel#require': false() function is unimplemented on this machine (NotImpl
ementedError)
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/.ext/common/monitor.rb:10:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in 'Kernel#eval'
from /var/tmp/tmp.INfzUXAeGi/ruby-4.0.1/lib/rubygems.rb:1452:in '<top (required)>'
from ./tool/rbinstall.rb:25:in 'Kernel#require'
from ./tool/rbinstall.rb:25:in '<main>'
```
monitor.so is present in the path that miniruby is looking for it.
Any pointers on where to start debugging this further or what changes in more recent versions of Ruby could have caused this would be greatly appreciated.
Thank you!
--
https://bugs.ruby-lang.org/
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2026-02-18 19:52 [ruby-core:124848] [Ruby Bug#21917] Unable to build 4.0.1 on AIX 7.2 mhashizume (Michael Hashizume) via ruby-core
2026-02-19 0:29 ` [ruby-core:124849] " nobu (Nobuyoshi Nakada) via ruby-core
2026-02-19 2:08 ` [ruby-core:124850] " nobu (Nobuyoshi Nakada) via ruby-core
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