[Scons-users] SharedLibrary + SHLIBVERSION and cygwin

[Bill Deegan]

Looks like you are using the mingw tools and not native cygwin compiler?

-Bill

On Tue, Aug 18, 2015 at 8:58 AM, Paweł Tomulik <ptomulik at meil.pw.edu.pl>
wrote:

> Hi all,
>
> I just started experimenting with SCons on cygwing trying to port one of
> my projects to cygwin. Looks like I'm unlucky with the SharedLibrary
> builder or just misunderstand how stuff works.
>
> At the moment I'm trying to build a minimal project with one executable
> and one shared library. The following is build report from that simple
> project (attached) on cygwin, SCons 2.3.4, python 2.7.10:
>
> ptomulik at mwnotebook:$ scons --tree=all
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Building targets ...
> g++ -o cygfoo-0-1-2.dll -Wl,-no-undefined -shared -Wl,-Bsymbolic
> -Wl,--out-implib,cygfoo-0-1-2.a -Wl,--out-implib=libfoo-0-1-2.dll.a
> -Wl,--export-all-symbols -Wl,--enable-auto-import -Wl,--whole-archive
> foo.os -Wl,--no-whole-archive -L.
> g++ -o main.exe -Wl,-no-undefined main.o -L. -lfoo
> /bin/ld: cannot find -lfoo
> collect2: error: ld returned 1 exit status
> scons: *** [main.exe] Error 1
> +-.
>   +-cygfoo-0-1-2.dll
>   | +-cygfoo-0-1-2.dll
>   |   +-foo.os
>   |     +-foo.cpp
>   |     +-/bin/g++
>   +-cygfoo-0-1-2.dll
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-foo.cpp
>   +-foo.hpp
>   +-foo.os
>   | +-foo.cpp
>   | +-/bin/g++
>   +-libfoo-0-1-2.dll.a
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-main.cpp
>   +-main.exe
>   | +-main.o
>   | | +-main.cpp
>   | | +-foo.hpp
>   | | +-/bin/g++
>   | +-/bin/g++
>   | +-cygfoo-0-1-2.dll
>   |   +-foo.os
>   |     +-foo.cpp
>   |     +-/bin/g++
>   +-main.o
>   | +-main.cpp
>   | +-foo.hpp
>   | +-/bin/g++
>   +-SConstruct
> scons: building terminated because of errors.
>
>
>
> This is for SCons 2.3.5:
>
> ptomulik at mwnotebook:$ scons --tree=all
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Building targets ...
> g++ -o foo.os -c -I. foo.cpp
> g++ -o cygfoo-0-1-2.dll -Wl,-no-undefined -shared -Wl,-Bsymbolic
> -Wl,--out-implib,cygfoo-0-1-2.a -Wl,--out-implib=libfoo-0-1-2.dll.a
> -Wl,--export-all-symbols -Wl,--enable-auto-import -Wl,--whole-archive
> foo.os -Wl,--no-whole-archive -L.
> g++ -o main.o -c -I. main.cpp
> g++ -o main.exe -Wl,-no-undefined main.o -L. -lfoo
> /bin/ld: cannot find -lfoo
> collect2: error: ld returned 1 exit status
> scons: *** [main.exe] Error 1
> +-.
>   +-cygfoo-0-1-2.dll
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-cygfoo.dll
>   +-foo.cpp
>   +-foo.hpp
>   +-foo.os
>   | +-foo.cpp
>   | +-/bin/g++
>   +-libfoo-0-1-2.dll.a
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-main.cpp
>   +-main.exe
>   | +-main.o
>   | | +-main.cpp
>   | | +-foo.hpp
>   | | +-/bin/g++
>   | +-/bin/g++
>   +-main.o
>   | +-main.cpp
>   | +-foo.hpp
>   | +-/bin/g++
>   +-SConstruct
> scons: building terminated because of errors.
>
>
>
> This is for SCons 2.3.6:
>
>
> ptomulik at mwnotebook:$ scons --tree=all
> scons: Reading SConscript files ...
> scons: done reading SConscript files.
> scons: Building targets ...
> g++ -o foo.os -c -I. foo.cpp
> g++ -o cygfoo-0-1-2.dll -Wl,-no-undefined -shared -Wl,-Bsymbolic
> -Wl,--out-implib,cygfoo-0-1-2.a -Wl,--out-implib=libfoo-0-1-2.dll.a
> -Wl,--export-all-symbols -Wl,--enable-auto-import -Wl,--whole-archive
> foo.os -Wl,--no-whole-archive -L.
> g++ -o main.o -c -I. main.cpp
> g++ -o main.exe -Wl,-no-undefined main.o -L. -lfoo
> /bin/ld: cannot find -lfoo
> collect2: error: ld returned 1 exit status
> scons: *** [main.exe] Error 1
> +-.
>   +-cygfoo-0-1-2.dll
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-cygfoo.dll
>   +-foo.cpp
>   +-foo.hpp
>   +-foo.os
>   | +-foo.cpp
>   | +-/bin/g++
>   +-libfoo-0-1-2.dll.a
>   | +-foo.os
>   |   +-foo.cpp
>   |   +-/bin/g++
>   +-main.cpp
>   +-main.exe
>   | +-main.o
>   | | +-main.cpp
>   | | +-foo.hpp
>   | | +-/bin/g++
>   | +-/bin/g++
>   +-main.o
>   | +-main.cpp
>   | +-foo.hpp
>   | +-/bin/g++
>   +-SConstruct
> scons: building terminated because of errors.
>
> Could someone help me pls? What is the proper way to write a portable
> SConstruct file, such that the attached project could build on Most
> platforms? Do I need a versioned shared libs at all on cygwin? It seems
> like the SONAME stuff does not apply here?
>
> --
> Paweł Tomulik
>
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