Hello. First of all, sorry for the late reply. I ran into a bit of a problem last week, and learned the hard way that having backups is not enough, you need to test them every now and then.
Anyway, I've just checked the build tree for the last build I performed (with --enable-libstdcxx-debug), and you are correct, there are two different versions of libstdc++.dll 14484098 ./prev-x86_64-w64-mingw32/libstdc++-v3/src/.libs/libstdc++-6.dll 16576791 ./prev-x86_64-w64-mingw32/libstdc++-v3/src/debug/.libs/libstdc++-6.dll 14484098 ./stage1-x86_64-w64-mingw32/libstdc++-v3/src/.libs/libstdc++-6.dll 16576791 ./stage1-x86_64-w64-mingw32/libstdc++-v3/src/debug/.libs/libstdc++-6.dll 14484098 ./x86_64-w64-mingw32/libstdc++-v3/src/.libs/libstdc++-6.dll 16576791 ./x86_64-w64-mingw32/libstdc++-v3/src/debug/.libs/libstdc++-6.dll Unfortunately, I've lost the install trees of my previous builds, but I'll be running them again in the next days. I'll post back here, when I have more info. Thanks, again, for your help. --- Paulo Caetano http://cidebycide.blogspot.pt/ On Tue, Sep 8, 2015 at 4:03 PM, koala01 <koal...@free.fr> wrote: > Le 07/09/2015 23:23, Paulo Caetano a écrit : > > Hello. > > > > I've been experimenting building GCC with --enable-libstdcxx-debug, > > both on Linux and MSYS2, and 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. <http://5.2.0.0/> > > > > Is my reasoning correct, or am I missing something? > > > > Thanks for your help. > > --- > > Paulo Caetano > > http://cidebycide.blogspot.pt/ > Hello, > > If i'm right (and i'm not sure to be :P) the problem comes from the Gcc > install script which doesn't make special directories for dll. > > I've experienced this problem in many occasions when compiling a > multilib version of Gcc (but with older Gcc versions), and the better > way i've found now is to manually create a separate directory for one > kind of dlls (will say : 32bits version ... should be debug version in > your special case) and to manually copy each dll to them correct place. > > Hope it helps ;) > > > ------------------------------------------------------------------------------ > _______________________________________________ > Mingw-w64-public mailing list > Mingw-w64-public@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mingw-w64-public >
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