OK, Ray, I'll post it there. Thanks for your help --- Paulo Caetano
On Mon, Sep 7, 2015 at 9:08 PM, Ray Donnelly <[email protected]> wrote: > Hi Paulo, > > On Sun, Sep 6, 2015 at 6:13 PM, Paulo Caetano > <[email protected]> wrote: > > Hello. > > > > I've been experimenting building GCC with --enable-libstdcxx-debug. > > > > I'm stopping the process after make install (on the function build()), to > > better understand what's being built, but there's one thing I'm not sure > of > > and I wonder if you could help me understand it. > > > > GCC docs say that configuring GCC with --enable-libstdcxx-debug will > build > > debug libraries "in addition to what is normally built", i.e., in > addition > > to the optimized libraries. > > > > I've tested this on Linux (Fedora 22, gcc 5.2.0), and it works as > expected. > > It builds two versions of libstdc++.a and a libstdc++.so > > (libstdc++.so.6.0.21), which are installed in > > <prefix>/lib/gcc/x86_64-redhat-linux/5.2.0 (optimized version, or "what > is > > normally built"), and in <prefix>/lib/gcc/x86_64-redhat-linux/5.2.0/debug > > (debug version). > > > > However, using --enable-libstdcxx-debug on MSYS2 gives me a different > > result. I got a single libstdc++.dll, in <prefix>/bin, and two versions > of > > libstdc++.a, one in <prefix>/lib/gcc/x86_64-w64-mingw32/5.2.0 and > another in > > <prefix>/lib/gcc/x86_64-w64-mingw32/5.2.0/debug. > > > > My first hypothesis was that --enable-libstdcxx-debug on MSYS2 was not > > creating the debug DLL (which I expected to find in > > <prefix>/lib/gcc/x86_64-w64-mingw32/5.2.0/debug). However, when I > compared > > the versions of libstdc++.dll created using --enable-libstdcxx-debug vs. > > --disable-libstdcxx-debug, I noticed they were different. > > > > So, my conclusion, so far, is that --disable-libstdcxx-debug acts > similar on > > Linux and MSYS2, and that --enable-libstdcxx-debug, on MSYS2, has the > > following behaviour: > > - Does not create the libstdc++.dll that is "normally built", i.e., the > > optimized version. > > - Creates the debug version of libstdc++.dll and installs it in > > <prefix>/bin. > > - Creates the debug version of libstdc++.a and installs it in > > <prefix>/lib/gcc/x86_64-w64-mingw32/5.2.0/debug. > > - Created the libstdc++.a that is "normally built", i.e., the optimized > > version, and installs it in <prefix>lib/gcc/x86_64-w64-mingw32/5.2.0. > > > > Is my reasoning correct, or am I missing something? > > While I have some ideas about this, MSYS2 sticks to a fairly vanilla > MinGW-w64/GCC setup. Therefore, this post is more appropriate on the > MinGW-w64 mailinglist. There Kai, JonY and many other MinGW-w64 > developers and users can aid the discussion. Can I ask that you post > it there instead please? > > Best regards, > > Ray. > > > > > Thanks for your help. > > --- > > Paulo Caetano > > http://cidebycide.blogspot.pt/ > > > > > ------------------------------------------------------------------------------ > > > > _______________________________________________ > > Msys2-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/msys2-users > > >
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