gem install snappy breaks on Ubuntu jammy / aarch64

[libweirdness]

this is my learning-programming environment:
aarch64/Android/Termux/Ubuntu server, Jammy, aka 22.04 LTS
Ruby 3.0.2
( I tried the git version of rbenv,
and discovered that NO version of Ruby can be compiled on this system except 3.1.2,
for some reason.
I reported that to bugs.ruby-lang, and they closed it almost immediately,
saying it was an ssl bug? )

Anyways, the bug looks simple, for a change...

stderr recorded this:

1 ERROR:  Error installing snappy:
  2    ERROR: Failed to build gem native extension.
  3                                                                                                 
 4     current directory: /var/lib/gems/3.0.0/gems/snappy-0.3.0/ext                                
 5 /usr/bin/ruby3.0 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20220609-23120-u8yna8.rb extconf.rb  
 6 checking for -lsnappy... yes                                                                    
 7 creating Makefile                                                                               
 8                                                                                                 
 9 current directory: /var/lib/gems/3.0.0/gems/snappy-0.3.0/ext                                    
10 make DESTDIR\= clean                                                                            
11                                                                                                 
12 current directory: /var/lib/gems/3.0.0/gems/snappy-0.3.0/ext                                    
13 make DESTDIR\=                                                                                  
14 compiling api.c                                                                                 
15 linking shared-object snappy_ext.so                                                             
16                                                                                                 
17 current directory: /var/lib/gems/3.0.0/gems/snappy-0.3.0/ext                                    
18 make DESTDIR\= install                                                                          
19 make: /usr/bin/mkdir: No such file or directory                                                 
20 make: *** [Makefile:202: .sitearchdir.time] Error 127                                           
21                                                                                                 22 make install failed, exit code 2                                                                23                                                                                                 24 Gem files will remain installed in /var/lib/gems/3.0.0/gems/snappy-0.3.0 for inspection.        
25 Results logged to /var/lib/gems/3.0.0/extensions/aarch64-linux/3.0.0/snappy-0.3.0/gem_make.out

I checked: the ONLY mkdir is in /bin not in /usr/bin
( and offhand, I don't recall any recent version of Linux having those under /usr?
is it searching for a special version?
one that includes the attr capabilities or something? )

Anyways, I hope this is a bug as easy to fix as my beginner-at-programming eyes thinks it is.

Salut, Namaste, & Kaizen!

( :

[libweirdness]

I just discovered the sha3 gem failed for the same reason!

This suggests there is some building-tool that both of youse are using,
that is the actual culprit!

Ha!

[miyucy]

Could you try below command?

ruby -v -rrbconfig -e "puts RbConfig::CONFIG['MAKEDIRS']"

👇 In my env.

ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-darwin21]
/usr/local/bin/gmkdir -p

And, this command.

grep -A 3 -B 3 mkdir $(gem env gemdir)/gems/snappy-0.3.0/ext/Makefile 

👇 In my env.

RM = rm -f
RM_RF = rm -fr
RMDIRS = rmdir -p
MAKEDIRS = /usr/local/bin/gmkdir -p
INSTALL = /usr/local/bin/ginstall -c
INSTALL_PROG = $(INSTALL) -m 0755
INSTALL_DATA = $(INSTALL) -m 644

---

mkmf https://github.com/ruby/ruby/blob/75223433512d46f94fba5c0cb6f585fff5e9eee7/lib/mkmf.rb#L2084

[miyucy]

Could you try one more command? (If you builded ruby from source with rbenv/ruby-build.)

grep -i mkdir ~/.rbenv/sources/3.1.2/ruby-3.1.2/config.status 

(please replace path with your using ruby version before run)

👇 In my env.

  mkdir conf$$.dir 2>/dev/null
# as_fn_mkdir_p
as_fn_mkdir_p ()
  test -d "$as_dir" || eval $as_mkdir_p || {
    test -z "$as_dirs" || eval "mkdir $as_dirs"
} # as_fn_mkdir_p
if mkdir -p . 2>/dev/null; then
  as_mkdir_p='mkdir -p "$as_dir"'
  as_mkdir_p=false
MKDIR_P='/usr/local/bin/gmkdir -p'
  (umask 077 && mkdir "$tmp")
S["MAKEDIRS"]="/usr/local/bin/gmkdir -p"
S["MKDIR_P"]="/usr/local/bin/gmkdir -p"
  as_dir="$ac_dir"; as_fn_mkdir_p
  ac_MKDIR_P=$MKDIR_P
  case $MKDIR_P in
  */*) ac_MKDIR_P=$ac_top_build_prefix$MKDIR_P ;;
s&@MKDIR_P@&$ac_MKDIR_P&;t t

[libweirdness]

I think you've got it!

$ ruby -v -rrbconfig -e "puts RbConfig::CONFIG['MAKEDIRS']"
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [aarch64-linux-gnu]
/usr/bin/mkdir -p

But there IS no mkdir, there!

That needs to get upstream to someone
( meaning you, who actually know what you're doing,
needs to get that to someone : )

---

$ grep -A 3 -B 3 mkdir $(gem env gemdir)/gems/snappy-0.3.0/ext/Makefile
RM = rm -f
RM_RF = $(RUBY) -run -e rm -- -rf
RMDIRS = rmdir --ignore-fail-on-non-empty -p
MAKEDIRS = /usr/bin/mkdir -p
INSTALL = /usr/bin/install -c
INSTALL_PROG = $(INSTALL) -m 0755
INSTALL_DATA = $(INSTALL) -m 644

again!

---

While I did build 3.1.2 from source,
it wasn't my goal:
I wanted Ruby 2.5.x, so I could have the same generation of Ruby as my
"The Well Grounded Rubyist, 3rd edition" book is using,
and 2.5.x never built, using apt installed rbenv,
so I tried the git rbenv, to see if ANY could be built,
& ended up with the newest, but all others failed...

I tried your search for config.status,
but there is no config.status under .rbenv,
according to find...

Awesome-quick insight, from you, tho!

I'm going to tell the sha3 issue tracker of this stuff you realized!

Kaizen, eh?

( :

[miyucy]

ah, you need install with -k option.

rbenv install --help                                     
Usage: rbenv install [-f|-s] [-kpv] <version>
       rbenv install [-f|-s] [-kpv] <definition-file>
       rbenv install -l|--list
       rbenv install --version

  -l/--list          List latest stable versions for each Ruby
  -L/--list-all      List all local versions
  -f/--force         Install even if the version appears to be installed already
  -s/--skip-existing Skip if the version appears to be installed already

  ruby-build options:

  -k/--keep          Keep source tree in $RBENV_BUILD_ROOT after installation
                     (defaults to $RBENV_ROOT/sources)
: 

(I'm always use -k option.)

[miyucy]

MAKEDIRS = /usr/bin/mkdir -p

I don't know why /usr/bin/mkdir...

docker run --rm ruby:3.1.2 ruby -v -rrbconfig -e 'puts RbConfig::CONFIG["MAKEDIRS"]'
Unable to find image 'ruby:3.1.2' locally
3.1.2: Pulling from library/ruby
Digest: sha256:af018e85cfae54a8d4c803640663e26232f49f31bfbe8b876e678e5365bc13ff
Status: Downloaded newer image for ruby:3.1.2
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]
/bin/mkdir -p

I think that value is /bin/mkdir typically...

[libweirdness]

that I recall, mkdir was in /bin back in 1996-8 or thereabouts:

hard-drives were so cramped, slow, & expensive,
that linux needed to be able to work in single-user mode without /usr partition even mounted,
( was much more common, back then, now only OpenBSD does it that way, I think ),
and you can't fix much without things like bash, ls, cp, rm, mkdir, rmdir, etc, can you?

After scrubbing my Ubuntu install, again,
I'll try rbenv with the -k option,
but I have no use for space-eating sources,
especially while trying to build-up my ultimate learning-programming environment in this machine!

It may take a couple of days,
but you'll get your info.

( :