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using cdt eclipse and cygwin to create .so shared object on windows 7 [message #990484]

Wed, 12 December 2012 11:30

Greg Mort
Messages: 2
Registered: December 2012

Junior Member

I have Eclipse CDT installed (juno) on my windows 7 computer I have cygwin installed (able to manually create a makefile and create a .so)

I want to use the cygwin compiler in eclipse to create a .so

I created a new shared library project in eclipse told it to use the cygwin c++ compiler

do a ctrl-b and it creates a .dll

how do I get it to make a .so?

this is using windows 7

11:13:05 **** Build of configuration Debug for project cygwinc++ ****
make all 
Building file: ../main.cpp
Invoking: Cygwin C++ Compiler
g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -o "main.o" "../main.cpp"
cygwin warning:
  MS-DOS style path detected: C:\Users\EAIGREG\workspace\cygwinc++\Debug
  Preferred POSIX equivalent is: /cygdrive/c/Users/EAIGREG/workspace/cygwinc++/Debug
  CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Finished building: ../main.cpp

Building target: cygwinc++.dll
Invoking: Cygwin C++ Linker
g++ -shared -o "cygwinc++.dll"  ./main.o   
cygwin warning:
  MS-DOS style path detected: C:\Users\EAIGREG\workspace\cygwinc++\Debug
  Preferred POSIX equivalent is: /cygdrive/c/Users/EAIGREG/workspace/cygwinc++/Debug
  CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Finished building target: cygwinc++.dll


11:13:06 Build Finished (took 390ms)

clearly this is using the wrong compiler... i know that my cygwin can create SO so how to i tell it to use the "linux" c++ compiler?

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Re: using cdt eclipse and cygwin to create .so shared object on windows 7 [message #990553 is a reply to message #990484]

Thu, 13 December 2012 01:00

Eclipse hates me !
Messages: 9
Registered: September 2012

Junior Member

You need a Windows->Linux cross-compiler to build a .so on Windows, see http://stackoverflow.com/questions/4769968/c-cross-compiler-from-windows-to-linux

But I'd rather setup a Linux VM in e.g. VirtualBox and build there, that seems like much less pain.

[Updated on: Thu, 13 December 2012 01:04]

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Re: using cdt eclipse and cygwin to create .so shared object on windows 7 [message #990612 is a reply to message #990553]

Thu, 13 December 2012 07:43

Greg Mort
Messages: 2
Registered: December 2012

Junior Member

Well its for a Android build ndk, so dont see a need to have a new OS just to build part of the project...

Isn't this the point of cygwin, I can manually createa a makefile and build a so with cygwin, I just want to use that as my cross compiler, seems unneccasary to go out and find a different one when cygwin can build .so

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