PostgreSQL 10 and MSYS2 MINGW64 and Windows 10

[AndreMikulec]

CurrentUser@MACHINE MINGW64 /c/PG-10._/pgxnclient/pgxnclient/Scripts
$ python pgxnclient-script.py install semver
INFO: best version: semver 0.17.0
INFO: saving c:\msys64\tmp\tmpjrgug2\semver-0.17.0.zip
INFO: unpacking: c:\msys64\tmp\tmpjrgug2\semver-0.17.0.zip
INFO: building extension
x86_64-w64-mingw32-gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2  -I. -I./ -IC:/PG-10._/include/server -IC:/PG-10._/include/internal  -I../source_pg.10.0_High_Performance.wide.LangPython/src/include/port/win32 -DEXEC_BACKEND  -I/w/zlib-1.2.8-win32-x86_64/include -IC:/PG-10._/include/server/port/win32  -c -o src/semver.o src/semver.c -MMD -MP -MF .deps/semver.Po
src/semver.c: In function 'tail_cmp':
src/semver.c:440:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
   char *dot = ".";
   ^~~~
x86_64-w64-mingw32-gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -O2  -shared -static-libgcc -o src/semver.dll src/semver.o -Wl,--export-all-symbols -LC:/PG-10._/lib -Wl,--allow-multiple-definition -Wl,--disable-auto-import  -L/w/zlib-1.2.8-win32-x86_64/bin -L/w/zlib-1.2.8-win32-x86_64/lib -Wl,--as-needed  -LC:/PG-10._/lib -lpostgres
cp sql/semver.sql sql/semver--0.17.0.sql
INFO: installing extension
/usr/bin/mkdir -p 'C:/PG-10._/share/extension'
/usr/bin/mkdir -p 'C:/PG-10._/share/extension'
/usr/bin/mkdir -p 'C:/PG-10._/lib'
/usr/bin/mkdir -p 'C:/PG-10._/share/doc/extension'
/usr/bin/install -c -m 644 .//semver.control 'C:/PG-10._/share/extension/'
/usr/bin/install -c -m 644 .//sql/semver--0.15.0--0.16.0.sql .//sql/semver--0.17.0--0.17.0.sql .//sql/semver--0.10.0--0.11.0.sql .//sql/semver--0.5.0--0.10.0.sql .//sql/semver--0.2.1--0.2.4.sql .//sql/semver--0.2.4--0.3.0.sql .//sql/semver--0.11.0--0.12.0.sql .//sql/semver--0.13.0--0.15.0.sql .//sql/semver--0.3.0--0.4.0.sql .//sql/semver--0.17.0.sql .//sql/semver--0.12.0--0.13.0.sql .//sql/semver--unpackaged--0.2.1.sql  'C:/PG-10._/share/extension/'
/usr/bin/install -c -m 755  src/semver.dll 'C:/PG-10._/lib/'
/usr/bin/install -c -m 644 .//doc/semver.mmd 'C:/PG-10._/share/doc/extension/'