Can't install Ruby with jemalloc on macOS Catalina 10.15.1

[ndbroadbent]

Hello,

I just set up a new mac, and now RUBY_CONFIGURE_OPTS=--with-jemalloc rbenv install 2.6.5 is failing with this error:

checking for utime.h... yes
checking gmp.h usability... no
checking gmp.h presence... no
checking for gmp.h... no
checking for library containing malloc_conf... no
checking jemalloc/jemalloc.h usability... no
checking jemalloc/jemalloc.h presence... no
checking for jemalloc/jemalloc.h... no
checking for jemalloc with JEMALLOC_MANGLE... no
configure: error: jemalloc requested but not found

I ran brew install rbenv jemalloc to install rbenv 1.1.2 and jemalloc 5.2.1.

How can I fix this issue? Thanks!

[mislav]

Hi thank you for reporting! I have no experience with jemalloc, and I haven't seen this error before. For me it works, but my mac is far from a pristine state.

Can you double check that jemalloc is linked into your /usr/local/bin? I.e. you can check whether running jemalloc-config --bindir works

[ndbroadbent]

Hello, here is the output:

$ jemalloc-config --bindir
/usr/local/Cellar/jemalloc/5.2.1/bin

$ ls -l /usr/local/bin/ | grep jemall
lrwxr-xr-x  1 ndbroadbent  admin        44 Dec  4 12:35 jemalloc-config -> ../Cellar/jemalloc/5.2.1/bin/jemalloc-config
lrwxr-xr-x  1 ndbroadbent  admin        40 Dec  4 12:35 jemalloc.sh -> ../Cellar/jemalloc/5.2.1/bin/jemalloc.sh
lrwxr-xr-x  1 ndbroadbent  admin        35 Dec  4 12:35 jeprof -> ../Cellar/jemalloc/5.2.1/bin/jeprof

Thanks for your help!

[mislav]

Well, I'm stumped. https://github.com/ruby/ruby/blob/v2_6_5/configure.ac#L1123-L1131

Not sure what is different in your environment vs mine.

[paulcsmith]

@ndbroadbent I occasionally run into this as well and end up having to uninstall homebrew and reinstall from scratch because I haven't figured out any other way to resolve it. Any tips?

[jaydorsey]

I'm seeing the same/similar behavior on Big Sur (m1) & Catalina (intel). I've tried a bunch of things to resolve this.

• I've tried RUBY_CONFIGURE_OPTS="--with-jemalloc-dir=($brew --prefix jemalloc)" (build succeeds, but i don't see jemalloc in RbConfig::CONFIG['MAINLIBS'])

• When I pass in --with-jemalloc (no directory) the build fails (same as OP)

• jemalloc-config --bindir works (returns a valid path/values)

• I have no jemalloc in /opt/homebrew/bin (but there is a jemalloc.sh symlink). that folder is exposed/available in my $path

• I'm using ruby-build via asdf-ruby for my version manager, but i've also tried directly with ruby-build

  export RUBY_CONFIGURE_OPTS="--with-jemalloc-dir=$(brew --prefix jemalloc) --with-readline-dir=($(brew --prefix readline)"
  ruby-build 3.0.0 ruby-3.0.0
  

• This was a pretty vanilla install on both machines (both new computers that I installed from scratch). Both running newer versions of homebrew. Force reinstalling jemalloc via homebrew doesn't resolve it

• I also completely re-installed homebrew from scratch after removing it

Everything looks normal to me, but it won't build with jemalloc on macOS. As far as I can tell, it hasn't for a while (I assumed it was, because it definitely did at one point). I went back and checked some older versions on another machine I had installed.

Similar-ish output from my intel as well (latest versions of nearly everything)

I feel like this isn't even limited to jemalloc, because I see similar behavior with gmp (I have it, ruby-build can't detect it, but i see linux builds using it) but the cause might be the same. it's like nothing is getting picked up as a configure option

using zsh/asdf (not sure if those matter, also tried ruby-build)

happy to setup a time to pair/screenshare

Update: I followed some of the config docs for readline, with same/similar path settings for jemalloc:

export LDFLAGS="-L$HOMEBREW_PREFIX/opt/openssl@1.1/lib -L$HOMEBREW_PREFIX/opt/readline/lib -L$HOMEBREW_PREFIX/opt/jemalloc/lib"
export CPPFLAGS="-I$HOMEBREW_PREFIX/opt/openssl@1.1/include -I$HOMEBREW_PREFIX/opt/readline/include -I$HOMEBREW_PREFIX/opt/jemalloc/include"

With those changes, RUBY_CONFIGURE_OPTS=--with-jemalloc asdf install ruby 3.0.0 build fine & ruby -e "puts RbConfig::CONFIG['MAINLIBS']" shows -ljemalloc as expected now

Also, I noticed some inconsistencies with the way configure/build flags behave so maybe I'm just doing this wrong now. --with-jemalloc works if i have the right *FLAGS, but --with-jemalloc-dir appears to do nothing. And it's the inverse for gmp; once i pass in --with-gmp-dir it works but --with-gmp doesn't

[mostlyobvious]

Update: I followed some of the config docs for readline, with same/similar path settings for jemalloc:

This worked for me (in fish shell):

set -gx HOMEBREW_PREFIX "/opt/homebrew";
set -gx CPPFLAGS "$CPPFLAGS -I $HOMEBREW_PREFIX/include"
set -gx LDFLAGS "$LDFLAGS -L $HOMEBREW_PREFIX/lib"