MinGW-w64 builds of GCC/Binutils for Windows

These packages contain both 32-bit and 64-bit compilers/binutils, and the mingw-w64 runtime headers/libraries.

The latest version includes:
- gcc 11.2
- gmp 6.2.1
- mpfr 4.1.0
- mpc 1.2.1
- isl 0.18
- binutils 2.36.1
- mingw-w64 9.0.0

Additionally, following libraries are included:
- pthreads-w32 2.9.1
- zlib 1.2.11
- bzip2 1.0.8

An alternate build is also available starting with r35 which supports the full POSIX thread model in GCC,
enabling eg. C++ std::threads to fully function, using mingw-w64 winpthreads instead of pthreads-w32.

This toolchain should be complemented with a MSYS environment for a full build-system.

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Version History:
r35a - 2021-08-16
    Using POSIX thread model with mingw-w64 winpthreads
r35 - 2021-08-15
    Updated to GCC 11.2, mingw-w64 9.0.0
r34 - 2021-07-13
    Updated to GCC 10.3, mingw-w64 8.0.2
r33 - 2021-02-27
    Updated to GCC 10.2, binutils 2.36.1, mingw-w64 8.0.0
r32 - 2020-04-30
    Updated to GCC  9.3, binutils 2.34, mingw-w64 7.0.0
r31 - 2019-10-14
    Updated to GCC 9.2, binutils 2.32, mingw-w64 6.0.0
r30 - 2019-02-27
    Updated to GCC 8.3, mpfr 4.0.2
r29 - 2018-11-01
    Updated to GCC 8.2, binutils 2.31.1, mingw-w64 5.0.4
r28 - 2018-02-07
    Updated to GCC 7.3, binutils 2.29.1, mingw-w64 5.0.3
r27 - 2017-08-16
    Updated to GCC 7.2, binutils 2.29
r26 - 2017-06-02
    Updated to GCC 7.1, binutils 2.28, mingw-w64 5.0.2, zlib 1.2.11
r25 - 2017-02-20
    Updated to mingw-w64 5.0.1+1 (9602ef1)
r24 - 2017-02-15
    Updated to mingw-w64 5.0.1
r23 - 2016-12-29
    Updated to mingw-w64 5.0.0
r22 - 2016-12-29
    Updated to GCC 6.3
r21 - 2016-09-27
    Updated to GCC 6.2, binutils 2.27
r20 - 2016-06-14
    Updated to GCC 6.1
r19 - 2016-06-14
    Updated to GCC 5.4, mingw-w64 4.0.6, isl 0.16.1, mpfr 3.1.4
r18 - 2015-12-05
    Updated to GCC 5.3, gmp 6.1.0, isl 0.15
r17 - 2015-12-01
    Updated to mingw-w64 4.0.4, binutils 2.25.1
r16 - 2015-07-20
    Updated to GCC 5.2
r15 - 2015-07-01
    Updated to GCC 5.1
r14 - 2015-06-30
    Updated to GCC 4.9.3, mingw-w64 4.0.2, mpfr 3.1.3
r13 - 2014-11-10
    Updated to GCC 4.9.2, mingw-w64 3.3.0
r12 - 2014-07-30
    Updated to GCC 4.9.1, GMP 6.0.0a
r11 - 2014-05-22
    Updated to GCC 4.8.3, mingw-w64 3.1.0, binutils 2.24
r10 - 2013-11-17
    Repackaged with proper pthreads 64-bit library
r9 - 2013-10-20
    Updated to GCC 4.8.2 and mingw-w64 3.0.0
r8 - 2013-06-01
    Updated GCC to 4.8.1, gmp to 5.1.2 and zlib to 1.2.8
    Using mingw-w64 trunk r5876
r7 - 2013-04-13
    Updated GCC to 4.8.0 and all libraries to match
    Using MinGW-w64 trunk, required for GCC 4.8
r6 - 2013-04-13
    Updated to GCC 4.7.3, mingw-w64 2.0.8
r5 - 2012-11-04
    Replaced experimental winpthreads with pthreads-w32 2.9.1
    Updated mpc to 1.0
r4 - 2012-10-27
    Updated scripts to Zeranoe's Script 3.0.6
    Updated to GCC 4.7.2 and mingw-w64 v2.0.7
r3 - 2012-07-14
    Updated to mpfr 3.1.1
    Updated to mingw-w64 stable/v2.x r5214
r2 - 2012-06-23
    Switched to MinGW-w64 stable/v2.x branch and clean build scripts
r1 - 2012-06-20
    Initial Version based on MinGW-w64 with GCC 4.7.1
