mingw32-gcc-9.2.1-i686-posix-sjlj-20190904-8ba5c53

gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=d:/msys/mingw32/bin/../libexec/gcc/i686-w64-mingw32/9.2.1/lto-wrapper.exe
Target: i686-w64-mingw32
Configured with: ../gcc-9-20190904-8ba5c53/configure --prefix=/mingw32 --with-local-prefix=/mingw32 --build=i686-w64-mingw32 --host=i686-w64-mingw32 --target=i686-w64-mingw32 --with-native-system-header-dir=/mingw32/i686-w64-mingw32/include --libexecdir=/mingw32/libexec --enable-checking=release --enable-fully-dynamic-string --enable-graphite --enable-languages=c,lto,c++ --enable-libatomic --enable-libgomp --enable-libstdcxx-time=yes --enable-lto --enable-sjlj-exceptions --enable-shared --enable-static --enable-threads=posix --disable-64bit --disable-bootstrap --disable-isl-version-check --disable-libssp --disable-libstdcxx-debug --disable-libstdcxx-pch --disable-multilib --disable-nls --disable-rpath --disable-symvers --disable-werror --disable-win32-registry --with-arch=i686 --with-gmp=/usr/local --with-gnu-as --with-gnu-ld --with-isl=/usr/local --with-libiconv --with-mpc=/usr/local --with-mpfr=/usr/local --with-system-zlib --with-tune=generic --with-pkgversion=‘i686-posix-sjlj-20190904-8ba5c53, Built by NLSoft‘ --with-bugurl=http://www.cnblogs.com/nlsoft
Thread model: posix
gcc version 9.2.1 20190904 (i686-posix-sjlj-20190904-8ba5c53, Built by NLSoft)

-------------------------------------------------------------------------------
gcc version 9 20190904-8ba5c53 --enable-sjlj-exceptions 
-------------------------------------------------------------------------------
export CPP=/mingw/bin/cpp export LD_LIBRARY_PATH=/usr/local/lib export LIBS= export   CFLAGS=‘-O2 -pipe -fno-ident -I/usr/local/include -I/usr/mingw/i686-w64-mingw32/include‘ export CPPFLAGS=‘-O2 -pipe -fno-ident -I/usr/local/include -I/usr/mingw/i686-w64-mingw32/include‘ export CXXFLAGS=‘-O2 -pipe -fno-ident -I/usr/local/include -I/usr/mingw/i686-w64-mingw32/include‘ export  LDFLAGS=‘-pipe -fno-ident -L/usr/local/lib  -L/usr/mingw/i686-w64-mingw32/lib -Wl,--large-address-aware‘ 

mkdir gccbuild
cd gccbuild

../gcc-9-20190904-8ba5c53/configure --prefix=/mingw32 --with-local-prefix=/mingw32 --build=i686-w64-mingw32 --host=i686-w64-mingw32 --target=i686-w64-mingw32 --with-native-system-header-dir=/mingw32/i686-w64-mingw32/include --libexecdir=/mingw32/libexec --enable-checking=release --enable-fully-dynamic-string --enable-graphite --enable-languages=c,lto,c++ --enable-libatomic --enable-libgomp --enable-libstdcxx-time=yes --enable-lto --enable-sjlj-exceptions --enable-shared --enable-static --enable-threads=posix --disable-64bit --disable-bootstrap --disable-isl-version-check --disable-libssp --disable-libstdcxx-debug --disable-libstdcxx-pch --disable-multilib --disable-nls --disable-rpath --disable-symvers --disable-werror --disable-win32-registry --with-arch=i686 --with-gmp=/usr/local --with-gnu-as --with-gnu-ld --with-isl=/usr/local --with-libiconv --with-mpc=/usr/local --with-mpfr=/usr/local --with-system-zlib --with-tune=generic --with-pkgversion=‘i686-posix-sjlj-20190904-8ba5c53, Built by NLSoft‘ --with-bugurl=http://www.cnblogs.com/nlsoft

make -j4 && echo -------------.install.-------------------------- && make install