Message-Id: <200006091641.MAA22408@delorie.com> Mailing-List: contact cygwin-developers-help AT sourceware DOT cygnus DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-developers-owner AT sourceware DOT cygnus DOT com Delivered-To: mailing list cygwin-developers AT sourceware DOT cygnus DOT com From: "Parker, Ron" To: Chris Faylor , cygwin-apps AT sourceware DOT cygnus DOT com, cygwin-developers AT sourceware DOT cygnus DOT com Subject: RE: [cet AT carlthompson DOT net: Re: Extreme newbie here...] Date: Fri, 9 Jun 2000 11:39:34 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2448.0) Content-Type: multipart/mixed; boundary="----_=_NextPart_000_01BFD231.5A8F7126" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_000_01BFD231.5A8F7126 Content-Type: text/plain; charset="windows-1252" > Is cygwin really "broken in recent releases"? Does anyone know why? EXECUTIVE SUMMARY: Somewhat. MORE REALISTIC SUMMARY: From what I have determined exception handling with -mno-cygwin is definately broken. But that is obvious if you look at the excpt.h. Paul Baxter actually sent a good email about that to the main list, cf. http://sourceware.cygnus.com/ml/cygwin/2000-06/msg00346.html. The other thing that is "broken" is the handling of lib[mc] with g++ which I have previously mentioned, created a patch to correct, and emailed the new executable to those that needed it. As a side note, I finally tracked down what was needed to release a new gcc w/o the i686-pc-cygwin directory, but will not be able to do so ... you got it ... until I get home this evening. BTW, Chris you should add "gcc_tooldir=/usr" and "gcc_tooldir=$inst/usr" to the appropriate make commands in the script from which you mailed excerpts yesterday. There may also be a problem of -mno-cygwin picking up the cygwin header files in some cases. I am looking into this. I can say that at least the following trivial program works both when compiled as C with gcc and as C++ with my modified g++. <--- hello.c ---> #include int APIENTRY WinMain(HINSTANCE a1,HINSTANCE a2,LPSTR a3,int a4) { MessageBox(NULL, "Hello, world!", NULL, MB_OK); return 0; } <--- End hello.c ---> However adding the simplest exception handling construct as in the following code creates a link error. <--- eh_hello.cpp ---> #include class foo { }; int APIENTRY WinMain(HINSTANCE a1,HINSTANCE a2,LPSTR a3,int a4) { try { throw foo(); } catch (foo& f) { MessageBox(NULL, "Hello, world!", NULL, MB_OK); } return 0; } <--- End eh_hello.cpp ---> Link error: bash-2.04$ g++ -mno-cygwin -fno-rtti hello.cpp -o hello /usr/lib/gcc-lib/i686-pc-cygwin/2.95.2/libgcc.a(_eh.o): In function `_eh_rtime_match': /home/src/gcc-2.95.2/gcc/./libgcc2.c(.text+0x389): undefined reference to `_impure_ptr' collect2: ld returned 1 exit status If your source code will compile with -fno-exceptions, it should work in most cases. 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