Hi Everyone, First of all, thankyou Oscar for having a look at my earlier pacman issues - I did not have time to further investigate, and have simply bypassed its installation for the time being.
My motivation to use MinGW64 is to build a custom GCC cross compiler toolchain for a custom architecture. However, before I do this, I would like to try installing a straightforward-as-possible native GCC toolchain, just to make sure that I understand the differences. I am currently having some difficulty doing this and would appreciate some pointers. The GCC source is a git clone of the upstream git repo, with the "releases/gcc-9.3.0" tag checked out. First of all, I install the native GCC through pacman base-devel. I then do $ gcc -v in order to retrieve the default configuration options. I decided, if I use the same options as the pacman version, I have maximum chance of everything working OK. * I then change --enable-bootstrap to --disable-bootstrap, to save time. This hopefully isn't known to cause problems? * also add CFLAGS='-ggdb3 -O0' CXXFLAGS='-ggdb3 -O0' to set everything up for debugging (I plan on debugging the custom arch compiler in the future) * I also changed the --with-pkgversion to "built by Maxim" for disambiguation (as seen in later logs) Then I decided to change the --prefix to a directory on my filesystem "C:\Users\Maxim\Documents\prj\mingw64\install". However I quickly realised this screws with a lot of things, since during compilation GCC fails to find `/lib/cpp` directory, and some other stuff. So instead I decided to leave --prefix to the default '/mingw64', and configure and make. The configuration stage goes OK, and so does the build. However I still would like to install my toolchain to a separate prefix, so I tried using the advice from the following StackOverflow thread: https://stackoverflow.com/questions/11307465/destdir-and-prefix-of-make $ make install prefix=C:\Users\Maxim\Documents\prj\mingw64\install The install process *almost* finishes, but fails at the following step: /bin/sh ../../gcc/gcc/../mkinstalldirs /c/Users/Maxim/Documents/prj/mingw64/install/lib/gcc/x86_64-w64-mingw32/9.3.0/plugin /usr/bin/install -c -m 644 cc1.exe.a //c/Users/Maxim/Documents/prj/mingw64/install/lib/gcc/x86_64-w64-mingw32/9.3.0/plugin/cc1.exe.a /usr/bin/install: cannot create regular file '//c/Users/Maxim/Documents/prj/mingw64/install/lib/gcc/x86_64-w64-mingw32/9.3.0/plugin/cc1.exe.a': No such file or directory make[2]: *** [../../gcc/gcc/c/Make-lang.in:165: c.install-plugin] Error 1 make[2]: Leaving directory '/c/Users/Maxim/Documents/prj/mingw64/build/gcc' make[1]: *** [Makefile:4416: install-gcc] Error 2 make[1]: Leaving directory '/c/Users/Maxim/Documents/prj/mingw64/build' make: *** [Makefile:2346: install] Error 2 Still, I do get g++.exe and gcc.exe in my C:\Users\Maxim\Documents\prj\mingw64\install\bin directory. When I invoke them with $ gcc -v I get Using built-in specs. COLLECT_GCC=C:\Users\Maxim\Documents\prj\mingw64\install\bin\gcc.exe Target: x86_64-w64-mingw32 Configured with: ../gcc/configure --prefix=/mingw64 --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include --libexecdir=/mingw64/lib --disable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++ --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --enable-plugin --with-libiconv --with-system-zlib --with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 --with-pkgversion='Built by Maxim' --with-bugurl= https://sourceforge.net/projects/msys2 --with-gnu-as --with-gnu-ld CFLAGS='-ggdb3 -O0' CXXFLAGS='-ggdb3 -O0' Thread model: posix gcc version 9.3.0 (Built by Maxim) But if i try to build something I get $ gcc -o hello hello.c gcc.exe: fatal error: cannot execute 'cc1': CreateProcess: No such file or directory compilation terminated. In more detail: $ gcc -v -o hello hello.c Using built-in specs. COLLECT_GCC=C:\Users\Maxim\Documents\prj\mingw64\install\bin\gcc.exe Target: x86_64-w64-mingw32 Configured with: ../gcc/configure --prefix=/mingw64 --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include --libexecdir=/mingw64/lib --disable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++ --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --enable-plugin --with-libiconv --with-system-zlib --with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 --with-pkgversion='Built by Maxim' --with-bugurl= https://sourceforge.net/projects/msys2 --with-gnu-as --with-gnu-ld CFLAGS='-ggdb3 -O0' CXXFLAGS='-ggdb3 -O0' Thread model: posix gcc version 9.3.0 (Built by Maxim) COLLECT_GCC_OPTIONS='-v' '-o' 'hello.exe' '-mtune=generic' '-march=x86-64' cc1 -quiet -v -iprefix c:\users\maxim\documents\prj\mingw64\install\bin\../lib/gcc/x86_64-w64-mingw32/9.3.0/ -D_REENTRANT hello.c -quiet -dumpbase hello.c -mtune=generic -march=x86-64 -auxbase hello -version -o C:\msys64\tmp\ccFyGqWi.s gcc.exe: fatal error: cannot execute 'cc1': CreateProcess: No such file or directory compilation terminated. One other thing I found worying, is that the -print-prog-name argument didn't seem to find anything: $ gcc -print-prog-name cc1 cc1 Compared with the pacman-installed mingw64 gcc: $ gcc -print-prog-name cc1 C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/9.3.0/cc1.exe And a native Ubuntu: /usr/lib/gcc/x86_64-linux-gnu/7/cc1 Ultimately what I would like to do is get a 100% clean build and install into a directory of my choice. I anticipate that the --with-prefix, --with-bindir, --with-libdir, --with-sysroot, --with-native-system-headers, etc, will require very fine cherry-picking to get gcc to pick up just the right set of native headers vs the newly-built libstdc++ headers, so I will try experimenting with these configure flags. But mingw64 world is very new to me. Will greatly appreciate any pointers what so ever, Maxim
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