MinGW-w64-GCC has been built statically beforehand, and it should be rebuilt to support dynamic linking. This section will be dedicated to finishing the MinGW-w64 toolchain.
![[Note]](../images/note.png)
This may take a while to build. Feel free to do something else while this is building.
Since you are targetting a triplet different from the host, running make install is generally safe, unlike a standard installation of a compiler which if it has been built wrong can brick the toolchain entirely.
Install x86_64 MinGW-w64-GCC by running the following commands:
mkdir build-x86_64-mingw-w64 &&
cd build-x86_64-mingw-w64 &&
../configure --prefix=/usr \
--target=x86_64-w64-mingw32 \
--enable-threads=posix \
--enable-shared \
--disable-multilib \
--enable-languages=c,c++ &&
make
Now, as the root user:
make install &&
cd .. &&
ln -sfv x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-cc &&
strip /usr/libexec/gcc/x86_64-w64-mingw32/15.1.0/{cc1*,collect2,lto*}
Install i686 MinGW-w64-GCC by running the following commands:
mkdir build-i686-mingw-w64 &&
cd build-i686-mingw-w64 &&
../configure --prefix=/usr \
--target=i686-w64-mingw32 \
--enable-shared \
--enable-threads=posix \
--disable-multilib \
--enable-languages=c,c++ &&
make
Now, as the root user:
make install &&
ln -sfv i686-w64-mingw32-gcc /usr/bin/i686-w64-mingw32-cc &&
strip /usr/libexec/gcc/i686-w64-mingw32/15.1.0/{cc1*,collect2,lto*}
Now that the MinGW-w64 cross toolchain has been fully installed, it is time to test the installation to make sure everything is working as expected.
Confirm that the regular C and C++ compilers are working correctly:
echo "int main(){}" >> main.c &&
cp -v main.c main.cpp &&
gcc main.c &&
./a.out &&
rm -v a.out &&
g++ main.cpp &&
./a.out &&
rm -v a.out main.{c,cpp}
If you're doing multilib:
echo "int main(){}" >> main.c &&
cp -v main.c main.cpp &&
gcc -m32 main.c &&
./a.out &&
rm -v a.out &&
g++ -m32 main.cpp &&
./a.out &&
rm -v a.out main.{c,cpp}
Now test the MinGW-w64 cross compiler.
For x86_64:
cat >> main.c << "EOF" &&
#include <stdio.h>
int main(){}
EOF
cp main.{c,cpp} &&
sed -i 's/stdio.h/iostream/g' main.cpp &&
x86_64-w64-mingw32-gcc main.c &&
rm -v a.exe &&
x86_64-w64-mingw32-g++ main.cpp &&
rm -v a.exe main.{c,cpp}
For i686:
cat >> main.c << "EOF" &&
#include <stdio.h>
int main(){}
EOF
cp main.{c,cpp} &&
sed -i 's/stdio.h/iostream/g' main.cpp &&
i686-w64-mingw32-gcc main.c &&
rm -v a.exe &&
i686-w64-mingw32-g++ main.cpp &&
rm -v a.exe main.{c,cpp}
The commands above should have no errors, otherwise something went wrong with the installation.
Run ../configure --help for a full list of options.
mkdir build; cd build: The GCC documentation recommends building the package in a dedicated build directory.
--enable-shared: This
option enables building shared libraries.
--enable-threads=posix:
This option enables support for POSIX threads via the winpthreads
library.
--disable-multilib: This
option ensures that files are created for the specific architecture
of your computer.
--enable-languages=c,c++:
This command builds support for C and C++. Refer to https://www.linuxfromscratch.org/blfs/view/svn/general/gcc.html
to find what other languages are supported.
make -k check: This command runs the test suite without stopping if any errors are encountered.
../contrib/test_summary: This command will produce a summary of the test suite results. You can append | grep -A7 Summ to the command to produce an even more condensed version of the summary. You may also wish to redirect the output to a file for review and comparison later on.
There are no binaries specific to this package besides the format the compilers are targetting, and thus are prefixed with the architecture triplet, such as x86_64-w64-mingw32-gcc. For in-depth descriptions, read https://www.linuxfromscratch.org/lfs/view/development/chapter08/gcc.html#contents-gcc.