[ruby-core:90747] [Ruby trunk Bug#15470] Getting Jemalloc to work with 2.6.0

Issue #15470 has been updated by mseneadza (Michael Seneadza).


I ran into this the other day.  Try:
~~~
irb(main):002:0> puts RbConfig::CONFIG['MAINLIBS']
-lpthread -ljemalloc -ldl -lobjc
~~~

----------------------------------------
Bug #15470: Getting Jemalloc to work with 2.6.0
https://bugs.ruby-lang.org/issues/15470#change-75923

* Author: kaspergrubbe (Kasper Grubbe)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.0p0 (2018-12-25 revision 66547) [x86_64-linux]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
I have a install script that installs all build requirements for Ruby together with libjemalloc, it then configures Ruby with the --with-jemalloc flag, they were all run on Debian 9 which installs jemalloc 3.6.0 from the Debian repositories.

When I run my script with Ruby 2.5, I get the following output from irb:

~~~ ruby
puts RbConfig::CONFIG['LIBS']
# -lpthread -ljemalloc -ldl -lcrypt -lm
~~~

However, if I build Ruby 2.6 in the exact same way, I do not see -ljemalloc flag:

~~~ ruby
puts RbConfig::CONFIG['LIBS']
# -lm
~~~

I've attached the output from the configure and make steps to this.

Did something change? Or do I need to change the way I do jemalloc detection with Ruby 2.6?



---Files--------------------------------
2-6.log (71.1 KB)
2-5.log (62.8 KB)
rubyinstall.sh (1.97 KB)


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