Re: [Boost-users] question on boost::regex expression(query);

2 Oct 2007


      Same problem during link and runtime with only dll. The static choice should 
avoid
dll problems so maybe I'll give that another look. Thanks again.


$ make boostd_rules_annotater
g++ -Wall  -ggdb -mthreads -msse -O3  -I .  \
-o rules_annotater  boost_rules_annotater.o \
-lpthread -L./boost -lmyboost -L./boost/lib -L. 
-lcygboost_regex-gcc-mt-1_33_1
-L./greta -lmygreta -ljpeg -lm -Lgreta bio_lo_level_string.o
Info: resolving vtable for boost::regex_errorby linking to 
__imp___ZTVN5boost11r
egex_errorE (auto-import)

Administrator@TESTBED01 /cygdrive/c/mydocs/scripts/cc/affx
$ /cygdrive/e/new/exp/brew/msbin/DUMPBIN /EXPORTS 
cygboost_regex-gcc-mt-1_33_1.
dll | grep regex_error
         33   20 0001B2E0 
_ZN5boost11regex_errorC1ENS_15regex_constants10error_t
ypeE
         34   21 0001AE60 
_ZN5boost11regex_errorC1ERKSsNS_15regex_constants10err
or_typeEi
         35   22 0001B450 
_ZN5boost11regex_errorC2ENS_15regex_constants10error_t
ypeE
         36   23 0001AE20 
_ZN5boost11regex_errorC2ERKSsNS_15regex_constants10err
or_typeEi
         37   24 0001AEE0 _ZN5boost11regex_errorD0Ev
         38   25 0001AEC0 _ZN5boost11regex_errorD1Ev
         39   26 0001AEA0 _ZN5boost11regex_errorD2Ev
        444  1BB 0001B1F0 _ZNK5boost11regex_error5raiseEv
        545  220 00093950 _ZTIN5boost11regex_errorE
        558  22D 00093DA8 _ZTSN5boost11regex_errorE
        571  23A 00094868 _ZTVN5boost11regex_errorE
$ cygcheck rules_annotater.exe
Found: c:\mydocs\scripts\cc\affx\rules_annotater.exe
c:/mydocs/scripts/cc/affx/rules_annotater.exe
  C:\WINNT\cygwin1.dll
    C:\WINNT\system32\ADVAPI32.DLL
      C:\WINNT\system32\KERNEL32.dll
        C:\WINNT\system32\ntdll.dll
      C:\WINNT\system32\RPCRT4.dll
  c:\mydocs\scripts\cc\affx\cygboost_regex-gcc-mt-1_33_1.dll


http://www.cygwin.com/ml/cygwin/2004-08/msg00753.html


--enable-auto-import
     Do sophisticated linking  of  _symbol  to  __imp__symbol  for  DATA
     imports  from  DLLs, and create the necessary thunking symbols when
     building the import libraries with those DATA exports. Note: Use of
     the  'auto-import'  extension  will  cause  the text section of the
     image file to be made  writable.  This  does  not  conform  to  the
     PE-COFF format specification published by Microsoft.

     Using 'auto-import' generally will 'just work' -- but sometimes you
     may see this message:

     "variable  '<var>'  can't  be  auto-imported.   Please   read   the
     documentation for ld's --enable-auto-import for details."

     This  message  occurs when some (sub)expression accesses an address
     ultimately given by the sum of two constants (Win32  import  tables
     only  allow  one).  Instances where this may occur include accesses
     to member fields of struct variables imported from a DLL,  as  well
     as  using  a  constant index into an array variable imported from a
     DLL.  Any multiword variable (arrays, structs, long long, etc)  may
     trigger  this  error  condition.   However, regardless of the exact
     data type of the offending exported variable, ld will always detect
     it, issue the warning, and exit.

     There  are  several  ways to address this difficulty, regardless of
     the data type of the exported variable:
...
From: "John Maddock" 
Reply-To: boost-users@lists.boost.org
To: 
Subject: Re: [Boost-users] question on boost::regex expression(query);
Date: Tue, 2 Oct 2007 18:45:30 +0100
Mike Marchywka wrote:
...
...
Well, I wanted a static build but couldn't get that to work and then
I realized
it needed a dll only when I tried to run in different location.
These are the lib's I have.
$ ls ./boost/lib | grep regex
libboost_regex-gcc-mt-1_33_1.a
libboost_regex-gcc-mt-s-1_33_1.a
libboost_regex-gcc-mt-s.a
libboost_regex-gcc-mt.a
Linking against the static produced undefines such as
./boost/lib/libboost_regex-gcc-mt-s-1_33_1.a(cpp_regex_traits.o):cpp_regex_trait
...
s.cpp:(.text+0x4cf): undefined reference to
`__gnu_cxx::__exchange_and_add(int v
olatile*, int)'
Looks like you need -lpthread or maybe -rt (I can't remember which symbols
are in which cygwin dll).
...
...
so it looked like the non-static was working.
It probably should as long as you're only linking to *one* regex library 
:-)
John.
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