Path64

Path64 was a commercial Compiler named EkoPath 4 now made open source under the GPLv3 License.
(Even though it is named Path64 it can't (yet) compile wine64 due to missing support for some gcc extensions.)

Homepage: http://www.path64.org/
Changelog (sometimes not available): https://github.com/path64/compiler/commits/master
BUG-Tracker: https://github.com/path64/compiler/issues

Build Path64

Get the source: git clone https://github.com/path64/compiler.git
run its configure
you may need to adjust the Makefile by turning \n\t into a linebreak and a tab
run make

Build Wine with Path64

 export PATH=$PATH:/path/to/path64/build/bin/
 CC=pathcc ./configure
 make

As of Wine 1.3.23 and Path64 commit 61a6ac1b96098c5007bbaaa433b136ee10e0b30d

You will see a lot of warnings like:

Warning: variable foo in bar might be used uninitialized

ignore them for now

This sometimes fails when winebuild runs ld in d3dx9_36:

/usr/bin/ld: Dwarf Error: Could not find abbrev number 117.
/usr/bin/ld: Dwarf Error: mangled line number section (bad file number).
pathcc INTERNAL ERROR: /usr/bin/ld died due to signal 11
winegcc: pathcc failed
- As Path64 depends on libdwarf it may be my version of it: 20091012-1 (reported to work with 20100214-1)

Using gcc as a workaround to compile this dll lets us get further.

Next failure while compiling dlls/msvcp90/exception.c:

/tmp/pathcc-s-74b0dc51.s: Assembler messages:
/tmp/pathcc-s-74b0dc51.s:494: Error: attempt to move .org backwards
- here i found a .org 0x0
/tmp/pathcc-s-74b0dc51.s:505: Error: attempt to move .org backwards
- here i found a .org 0x10

Using gcc as a workaround to compile this dll lets us get further building.

then the same for much more files like dlls/msvcrt/cpp.c

Next failure is with winebuild trying to create ntdll.dll.so: