From: nobu@...
Date: 2015-06-01T09:46:27+00:00
Subject: [ruby-core:69424] [Ruby trunk - Bug #11201] pkg_config NoMethodError when finding other -config program

Issue #11201 has been updated by Nobuyoshi Nakada.


Thank you, does this patch work?

~~~diff
diff --git i/lib/mkmf.rb w/lib/mkmf.rb
index be9b06c..615e2dc 100644
--- i/lib/mkmf.rb
+++ w/lib/mkmf.rb
@@ -1818,11 +1818,15 @@ SRC
         cflags = get['cflags']
       end
       libs = get['libs-only-l']
-      ldflags = (Shellwords.shellwords(ldflags) - Shellwords.shellwords(libs)).quote.join(" ")
-      $CFLAGS += " " << cflags
-      $CXXFLAGS += " " << cflags
+      if cflags
+        $CFLAGS += " " << cflags
+        $CXXFLAGS += " " << cflags
+      end
+      if libs
+        ldflags = (Shellwords.shellwords(ldflags) - Shellwords.shellwords(libs)).quote.join(" ")
+        $libs += " " << libs
+      end
       $LDFLAGS = [orig_ldflags, ldflags].join(' ')
-      $libs += " " << libs
       Logging::message "package configuration for %s\n", pkg
       Logging::message "cflags: %s\nldflags: %s\nlibs: %s\n\n",
                        cflags, ldflags, libs
~~~

----------------------------------------
Bug #11201: pkg_config NoMethodError when finding other -config program
https://bugs.ruby-lang.org/issues/11201#change-52696

* Author: Hans Mackowiak
* Status: Feedback
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.0dev (2015-05-28 trunk 50658) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
----------------------------------------

where it does work (existing package)

~~~ruby
pkg_config("gtk+-x11-2.0") #  => ["-pthread", "", "-lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype"] 
pkg_config("gtk+-x11-2.0", "version") # => "0.28" 
~~~

where it does work (non-existing package)

~~~ruby
pkg_config("wx-bla", "version") # => nil 
pkg_config("wx-bla") #  => nil 
~~~

where it maybe not work (other (pkg)-config program)

~~~ruby
pkg_config("wx", "version") # => "3.1.0" 

pkg_config("wx") #either should try to return the same stuff as pkg_config("gtk+-x11-2.0") if possible, or if not return nil
~~~
~~~
NoMethodError: undefined method `scan' for nil:NilClass
	from /usr/local/rvm/rubies/ruby-head/lib/ruby/2.3.0/shellwords.rb:73:in `shellsplit'
	from /usr/local/rvm/rubies/ruby-head/lib/ruby/2.3.0/mkmf.rb:1819:in `pkg_config'
	from (irb):11
	from /usr/local/rvm/rubies/ruby-head/bin/irb:11:in `<main>'
~~~



-- 
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