From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Charles S. Wilson" To: Patrick Reuter Cc: cygwin@sources.redhat.com Subject: Re: Build libraries with gcc Date: Mon, 12 Feb 2001 08:23:00 -0000 Message-id: <3A880E1B.2461E7F5@ece.gatech.edu> References: <3A880D73.341264A5@uni-hohenheim.de> X-SW-Source: 2001-02/msg00602.html g++ -shared doesn't do what you think. It doesn't build unix-style shared libraries. It builds windows DLL's, which *MUST* end in .dll if you want the windows loader to load them into memory for your linked app. If you want a static lib, leave out the -shared. If you want a DLL, you probably need to do a mailing list search on "building a DLL"; it is likely that you will need to modify the source code (hint: __declspec(dllexport) and __declspec(dllimport) decorations). Take a look at the source code and Makefiles in the ncurses-5.2-4-src.tar.gz packge (especially in the c++/ directory). --Chuck Patrick Reuter wrote: > > Hello, > > I have a question building libraries using gcc under cygwin. > > When compiling in Linux/Unix, I have no error message. When compiling > under Windows, I get the following error message with any of my > libraries: > > g++ -shared -pg -o libGIF.so main.o readGIF.o writeGif.o > > Cannot export _bss_end__: symbol not defined > Cannot export _bss_start__: symbol not defined > Cannot export _data_end__: symbol not defined > Cannot export _data_start__: symbol not defined > Cannot export _monstartup: symbol not defined > main.o(.text+0x31):main.c: undefined reference to `_monstartup' > collect2: ld returned 1 exit status > > Tank you for any help!! > > Patrick > > -- > Want to unsubscribe from this list? > Check out: http://cygwin.com/ml/#unsubscribe-simple -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple