Problems creating "-mno-cygwin" DLLs with libtool HACK.
Vladius
boxforsr@inbox.ru
Tue Feb 1 17:15:00 GMT 2005
Vladius wrote:
> I have problems compiling DLLs with -mno-cygwin flag, using libtool.
>
> Command is: libtool --mode=link --tag=CXX g++ -rpath
> /Projects/Tests/libtool -mno-cygwin -no-undefined -o libcommon.la
> common.lo
> Output:
> rm -fr .libs/libcommon.a .libs/libcommon.la .libs/libcommon.lai
> g++ -shared -nostdlib
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/crtbegin.o .libs/common.o
> -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3
> -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/../../.. -lstdc++ -lgcc
> -lcygwin -luser32 -lkernel32 -ladvapi32 -lshell32 -lgcc
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/crtend.o -mno-cygwin -o
> .libs/cygcommon-0.dll -Wl,--image-base=0x10000000
> -Wl,--out-implib,.libs/libcommon.dll.a
> ar cru .libs/libcommon.a common.o
> ranlib .libs/libcommon.a
> creating libcommon.la
> (cd .libs && rm -f libcommon.la && ln -s ../libcommon.la libcommon.la)
>
> As U can see... it automatically passes -lcygwin flag to the
> linker(g++). When cygcheck'ing resulting DLL it lists cygwin DLL as
> one of its dependencies.
> I heard somewhere that cygwin is requierd for DLL initialisation, is
> it true?
> The interesting thing is that linking against resulting DLL with
> so-called "-mno-cygwin -lcygwin" mix results in program startup
> failure(no errors, it just hangs).
> Any ideas on how to create cygwin independent DLL with libtool?
I have found a solution to hack this issue.
1.Goto usr/autotool/devel/bin/
2.Open "libtool" file with a text editor(vim).
3.Search for "postdeps" initialisation. ("postdeps=" string)
4.Remove "-lcygwin" initialisation literal string to the right.
5.Check out next variable assignment - "compiler_lib_search_path=".
6.change "i*86-pc-cygwin" to "i*86-pc-mingw" in all of its occurences to
the right of varable assignment.
The resulting library created with libtool no longer depends on cygwin DLL.
Does anyone have a better solution? Maybe I just missed smth allready
known or implemented. Please, let me know.
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
More information about the Cygwin
mailing list