tools: add mingw update script

Author: ypsvlq

tools/update_mingw.sh

@@ -0,0 +1,76 @@
+#!/bin/sh -e
+
+if [ $# != 2 ]; then
+    echo "usage: $0 <zig-lib-dir> <mingw-w64-dir>"
+    exit 1
+fi
+
+: ${MAKE:=make -j$(nproc)}
+ZIG="$(realpath $1)"
+set -x
+cd $2
+
+cd mingw-w64-headers
+./configure --prefix= --includedir=/ --with-widl --with-default-win32-winnt=0x0A00 --with-default-msvcrt=ucrt
+$MAKE
+rm -r "$ZIG/libc/include/any-windows-any"
+$MAKE install DESTDIR="$ZIG/libc/include/any-windows-any"
+cd ..
+
+cd mingw-w64-crt
+rm -r build-aux libce math/DFP math/softmath profile testcases
+rm .gitignore ChangeLog* Makefile.* aclocal.m4 config.h.in configure*
+rm gdtoa/README* lib*/Makefile.am lib*/ChangeLog*
+rm cfguard/mingw_cfguard_loadcfg.S
+rm crt/binmode.c crt/crtbegin.c crt/crtend.c crt/CRT_fp8.c crt/CRT_glob.c crt/CRT_noglob.c crt/txtmode.c crt/ucrtexe.c
+rm lib32/res.rc lib32/test.c
+rm mingw/mingwthrd.def mingw/mthr_stub.c
+for f in agtctl_i agtsvr_i cdoex_i cdoexm_i cdosys_i emostore_i iisext_i mtsadmin_i mtxadmin_i scardssp_i scardssp_p tsuserex_i; do
+    mv libsrc/$f.c "$ZIG/libc/include/any-windows-any"
+done
+for f in COPYING include/config.h; do
+    cp "$ZIG/libc/mingw/$f" $f;
+done
+rm -r "$ZIG/libc/mingw"
+cp -r . "$ZIG/libc/mingw"
+
+set +x
+
+echo
+echo 'Processing MRI files...'
+cd "$ZIG/libc/mingw"
+
+first_arg() {
+    echo $1
+}
+
+for f in lib*/*.mri; do
+    out=${f%.mri}.zri
+    while read line; do
+        case $line in
+            ADDLIB\ lib*.a)
+                lib=${line#ADDLIB lib}
+                lib=${lib%.a}
+                case $lib in
+                    *_extra|*_def|msvcrt_common) ;;
+                    *)
+                        case $(first_arg lib*/$lib.def*) in
+                            lib\**) echo "warning: $out: def file for $lib not found"
+                        esac
+                        echo $lib >>$out
+                esac
+                ;;
+            \;*|CREATE*|SAVE|END) ;;
+            *)
+                echo "error: unsupported line in $f: $line"
+                exit 1
+        esac
+    done <$f
+    rm $f
+done
+
+echo
+echo 'Done.'
+echo
+echo 'If there were changes to mingw-w64-crt/Makefile.am since the last release,'
+echo 'edit src/mingw.zig to reflect them.'