ruby "config.h" header in wrong location

Number:rdar://46465917 Date Originated:2018-12-04
Status: Resolved:
Product:macOS Product Version:10.14.1
Classification:Serious Bug Reproducible:Always
Summary:  According to `uname -a`, the architecture target of macOS 10.14.1 is "darwin18".  This is the architecture value that ruby uses when generating Makefiles for native extensions.  However, this causes those Makefiles to refer to:


Which is a path which does not exist on the system.  Instead, the ruby config.h file is located at:


Note the "universal-darwin17" in the path, which suggests this is for an older version of macOS.

Steps to Reproduce:

From the Terminal, run the command `sudo gem install redcarpet`

Expected Results:

The installation to complete successfully.

Actual Results:

The installation fails with the error:

make: *** No rule to make target `/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/include/ruby-2.3.0/universal-darwin18/ruby/config.h', needed by `autolink.o'.  Stop.


macOS 10.14.1, builtin ruby ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-darwin18]


See attached sysdiagnose.


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