Issue #6391 has been reported by raylinn / gmail.com (ray linn).

----------------------------------------
Bug #6391: Segment Fault while execute make_encmake.rb for Ruby 1.9.3 P194 ( MinGW64)
https://bugs.ruby-lang.org/issues/6391

Author: raylinn / gmail.com (ray linn)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.3p194 (2012-04-20) [x64-mingw32]


The Ruby is compiled by MinGW64 (GCC 4.7.0 ), configure script is :

./configure --build=x86_64-w64-mingw32 CFLAGS="-O2 -mieee-fp -I/usr/local/include" LDFLAGS="-L/usr/local/include"

when miniruby executing, error occurs with the following message:


        CC = gcc
        LD = ld
        LDSHARED = gcc -shared
        CFLAGS = -O2 -mieee-fp -I/usr/local/include
        XCFLAGS = -include ruby/config.h -include ruby/missing.h -fvisibility=hi
dden -DRUBY_EXPORT
        CPPFLAGS =   -I. -I.ext/include/x64-mingw32 -I./include -I.
        DLDFLAGS = -Wl,--enable-auto-image-base,--enable-auto-import -Wl,--out-i
mplib=libx64-msvcrt-ruby191.dll.a x64-msvcrt-ruby191.def
        SOLIBS = x64-msvcrt-ruby191.res.o -lshell32 -lws2_32 -limagehlp
generating enc.mk
C:/msys/1.0/home/beta/ruby-1.9.3-p194/lib/mkmf.rb:5: [BUG] Segmentation fault
ruby 1.9.3p194 (2012-04-20) [x64-mingw32]

-- Control frame information -----------------------------------------------
c:td p:---- s:td b:td l:td d:td CFUNC  :require
c:td p:td s:td b:td l:td d:td TOP    C:/msys/1.0/home/beta/ruby-1.9.3-p194/lib/m
kmf.rb:5
c:td p:---- s:td b:td l:td d:td FINISH
c:td p:---- s:td b:td l:td d:td CFUNC  :load
c:td p:td s:td b:td l:tx d:tx EVAL   ./enc/make_encmake.rb:8
c:td p:---- s:td b:td l:td d:td FINISH
c:td p:td s:td b:td l:tx d:tx TOP

-- Ruby level backtrace information ----------------------------------------
./enc/make_encmake.rb:8:in `<main>'
./enc/make_encmake.rb:8:in `load'
C:/msys/1.0/home/beta/ruby-1.9.3-p194/lib/mkmf.rb:5:in `<top (required)>'
C:/msys/1.0/home/beta/ruby-1.9.3-p194/lib/mkmf.rb:5:in `require'

-- C level backtrace information -------------------------------------------
C:\windows\SYSTEM32\ntdll.dll(NtWaitForSingleObject+0xa) [0x0000000076EE135A]
C:\windows\system32\KERNELBASE.dll(WaitForSingleObjectEx+0x9c) [0x000007FEFD5710
DC]
 [0x000000000051FA34]
 [0x000000000042EBD7]
 [0x000000000042F076]
 [0x00000000004C3BD4]
 [0x0000000000533F25]
C:\windows\SYSTEM32\ntdll.dll(_C_specific_handler+0x9c) [0x0000000076EA85A8]
C:\windows\SYSTEM32\ntdll.dll(RtlDecodePointer+0xbd) [0x0000000076EB9D0D]
C:\windows\SYSTEM32\ntdll.dll(RtlUnwindEx+0xbbf) [0x0000000076EA91AF]
C:\windows\SYSTEM32\ntdll.dll(KiUserExceptionDispatcher+0x2e) [0x0000000076EE127
8]
 [0x0000000000441810]
 [0x0000000000441713]
 [0x0000000000507685]
 [0x00000000004412FA]
 [0x0000000000441713]
 [0x0000000000507685]
 [0x00000000004412FA]
 [0x0000000000441713]
 [0x0000000000507685]
 [0x00000000004412FA]
 [0x000000000050D095]
 [0x00000000004412FA]
 [0x000000000050BB59]
 [0x00000000004CB35E]
 [0x000000000050BC3A]
 [0x00000000004412FA]
 [0x000000000044305D]
 [0x0000000000443AFF]
 [0x00000000004CE7D1]
 [0x00000000004D04AE]
 [0x0000000000477792]
 [0x0000000000486445]
 [0x000000000048E5F5]
 [0x0000000000521068]
 [0x0000000000525890]
 [0x000000000047BFB2]
 [0x00000000004C218B]
 [0x0000000000432D67]
 [0x00000000004C294B]
 [0x0000000000434556]
 [0x000000000043574C]
 [0x000000000051B50A]
 [0x0000000000510F7F]
 [0x0000000000515EA0]
 [0x000000000051DABC]
 [0x00000000004345C0]
 [0x00000000004346D1]
 [0x000000000051B50A]
 [0x0000000000510F7F]
 [0x0000000000515EA0]
 [0x000000000051DB88]
 [0x0000000000431AF7]
 [0x00000000004325AD]
 [0x0000000000433F50]
 [0x0000000000538627]
 [0x00000000004013C9]
 [0x00000000004014E8]
C:\windows\system32\kernel32.dll(BaseThreadInitThunk+0xd) [0x0000000076C2652D]

-- Other runtime information -----------------------------------------------

* Loaded script: ./enc/make_encmake.rb

* Loaded features:

    0 enumerator.so
    1 mkmf.rb

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html


This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
make: *** [enc.mk] Error 3


-----------------------------------------------------------------------------------

Once changed the "-O2" to "-Ofast -fno-finite-math-only" , issue disappeared. 


-- 
http://bugs.ruby-lang.org/