We can know whether the system OpenSSL library is usable or not only after a miniruby is built, which is probably too late for such an option to be useful.
However I agree there are rooms for improvement. Here is the message shown when ext/*/extconf.rb fails:
configuring openssl
<snip...>
*** Following extensions failed to configure:
../.././ext/openssl/extconf.rb:0: Failed to configure openssl. It will not be installed.
*** Fix the problems, then remove these directories and try again if you want.
This is not informative about what exactly caused the failure. Actually, everything is logged to ext/*/mkmf.log, but people would never find this without googling. Maybe a change to ext/extmk.rb something like this would make it better?
From 2048a2fcb63952201f2bab404c6d01a99159449a Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Mon, 13 Mar 2017 20:47:19 +0900
Subject: [PATCH] ext/extmk.rb: mention ext/*/mkmf.log if configuring
extensions fails
---
ext/extmk.rb | 39 ++++++++++++++++++++-------------------
1 file changed, 20 insertions(+), 19 deletions(-)
diff --git a/ext/extmk.rb b/ext/extmk.rb
index 4317a2a8a333..931242a31d5b 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -222,7 +222,6 @@ def extmake(target, basedir = 'ext', maybestatic = true)
rescue SystemExit
# ignore
rescue => error
- lineno = error.backtrace_locations[0].lineno
ok = false
ensure
rm_f "conftest*"
@@ -238,18 +237,16 @@ def extmake(target, basedir = 'ext', maybestatic = true)
return true if !error and target.start_with?("-")
- if parent
- message = "Failed to configure #{target}. It will not be installed."
- else
- message = "Skipped to configure #{target}. Its parent is not configured."
- end
- if Logging.log_opened?
- Logging::message(error.to_s) if error
- Logging::message(message)
+ message = nil
+ if error
+ bl = error.backtrace_locations[0]
+ message = "#{bl.absolute_path}:#{bl.lineno}: #{error.message}"
+ if Logging.log_opened?
+ Logging::message("#{message}\n\t#{error.backtrace.join("\n\t")}\n")
+ end
end
- message = error.message if error
- return parent ? [conf, lineno||0, message] : true
+ return [parent, message]
end
args = $mflags
unless $destdir.to_s.empty? or $mflags.defined?("DESTDIR")
@@ -560,7 +557,7 @@ def create_makefile(*args, &block)
if !$nodynamic or $static
result = extmake(d, ext_prefix, !@gemname) or abort
extso |= $extso
- fails << result unless result == true
+ fails << [d, result] unless result == true
end
end
@@ -719,15 +716,19 @@ def mf.macro(name, values, max = 70)
mf.puts "\n""note:\n"
unless fails.empty?
- mf.puts %Q<\t@echo "*** Following extensions failed to configure:">
- fails.each do |d, n, err|
- d = "#{d}:#{n}:"
- if err
- err.scan(/.+/) do |ee|
- mf.puts %Q<\t@echo "#{d} #{ee.gsub(/["`$^]/, '\\\\\\&')}">
+ mf.puts %Q<\t@echo "*** Following extensions are not compiled:">
+ fails.each do |ext, (parent, err)|
+ mf.puts %Q<\t@echo "#{ext}:">
+ if parent
+ mf.puts %Q<\t@echo "\tCould not be configured. It will not be installed.">
+ if err
+ err&.scan(/.+/) do |ee|
+ mf.puts %Q<\t@echo "\t#{ee.gsub(/["`$^]/, '\\\\\\&')}">
+ end
end
+ mf.puts %Q<\t@echo "\tCheck #{ext_prefix}/#{ext}/mkmf.log for more details.">
else
- mf.puts %Q<\t@echo "#{d}">
+ mf.puts %Q<\t@echo "\tSkipped because its parent was not configured.">
end
end
mf.puts %Q<\t@echo "*** Fix the problems, then remove these directories and try again if you want.">
--
2.12.0.248.g76c07830f945.dirty
By the way, which directories does "*** Fix the problems, then remove these directories and try again if you want." refer to?
Updated by 
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Updated by Anonymous