switch appveyor to use cygwin instead of msys2

this will match what the buildbots use to make binaries
(gcc 5 pthreads, c++11 abi instead of gcc 4 win32 threads, old abi)

use cygpath_w around llvm-size call for make build-stats

Makefile

@@ -622,7 +622,9 @@ LLVM_SIZE := $(build_depsbindir)/llvm-size$(EXE)
 endif
 build-stats:
  @echo $(JULCOLOR)' ==> ./julia binary sizes'$(ENDCOLOR)
- $(call spawn,$(LLVM_SIZE) -A $(build_private_libdir)/sys.$(SHLIB_EXT) $(build_shlibdir)/libjulia.$(SHLIB_EXT) $(build_bindir)/julia$(EXE))
+ $(call spawn,$(LLVM_SIZE) -A $(call cygpath_w,$(build_private_libdir)/sys.$(SHLIB_EXT)) \
+ $(call cygpath_w,$(build_shlibdir)/libjulia.$(SHLIB_EXT)) \
+ $(call cygpath_w,$(build_bindir)/julia$(EXE)))
  @echo $(JULCOLOR)' ==> ./julia launch speedtest'$(ENDCOLOR)
  @time $(call spawn,$(build_bindir)/julia$(EXE) -e '')
  @time $(call spawn,$(build_bindir)/julia$(EXE) -e '')

appveyor.yml

@@ -31,8 +31,7 @@ init:
 
 cache:
 # Cache large downloads to avoid network unreliability
- - i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z
- - x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z
+ - C:\cygdownloads
  - llvm-3.9.1-i686-w64-mingw32-juliadeps-r06.7z
  - llvm-3.9.1-x86_64-w64-mingw32-juliadeps-r06.7z
  - usr/bin/busybox.exe
@@ -46,11 +45,11 @@ build_script:
 # Remove C:\MinGW\bin from the path, the version of MinGW installed on
 # AppVeyor is not compatible with the cross-compiled Julia Windows binaries
  - set PATH=%PATH:C:\MinGW\bin;=%
-# Remove C:\Perl\bin from the path, otherwise it breaks shasum with an error
-# Unable to find Digest::SHA or Digest::SHA::PurePerl
- - set PATH=%PATH:C:\Perl\bin;=%
+# Remove git's msys2 from path, since it conflicts with cygwin1.dll
+ - set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
+ - ps: contrib/windows/install-cygwin.ps1
 # - '"%VS120COMNTOOLS%\..\..\VC\vcvarsall.bat" x86_amd64'
- - C:\msys64\usr\bin\sh.exe --login /c/projects/julia/contrib/windows/msys_build.sh
+ - C:\cygwin-%ARCH%\bin\sh.exe --login /cygdrive/c/projects/julia/contrib/windows/appveyor_build.sh
 
 test_script:
  - usr\bin\julia -e "versioninfo()"

contrib/windows/msys_build.sh → contrib/windows/appveyor_build.sh

@@ -67,8 +67,7 @@ case $(uname) in
  if [ -z "`which gcc 2>/dev/null`" ]; then
  echo 'override HOSTCC = $(CROSS_COMPILE)gcc' >> Make.user
  fi
- make win-extras >> get-deps.log
- SEVENZIP="dist-extras/7z"
+ SEVENZIP="7z"
  ;;
  Linux)
  if [ -z "$XC_HOST" ]; then
@@ -93,6 +92,7 @@ if ! [ -e julia-installer.exe ]; then
  echo "Extracting $f"
  $SEVENZIP x -y $f >> get-deps.log
 fi
+mkdir -p usr
 for i in bin/*.dll; do
  $SEVENZIP e -y julia-installer.exe "$i" \
  -ousr\\`dirname $i | sed -e 's|/julia||' -e 's|/|\\\\|g'` >> get-deps.log
@@ -111,7 +111,7 @@ rm -f usr/bin/libssp-0.dll
 rm -f usr/bin/libstdc++-6.dll
 
 if [ -z "$USEMSVC" ]; then
- if [ -z "`which ${CROSS_COMPILE}gcc 2>/dev/null`" -o -n "$APPVEYOR" ]; then
+ if [ -z "`which ${CROSS_COMPILE}gcc 2>/dev/null`" ]; then
  f=$ARCH-4.9.2-release-win32-$exc-rt_v4-rev3.7z
  checksum_download \
  "$f" "https://bintray.com/artifact/download/tkelman/generic/$f"
@@ -164,6 +164,7 @@ if ! [ -e usr/bin/busybox.exe ]; then
  echo "Downloading $f"
  $curlflags -o usr/bin/busybox.exe https://frippery.org/files/busybox/$f
 fi
+chmod +x usr/bin/* usr/tools/*
 
 for lib in SUITESPARSE ARPACK BLAS LAPACK \
  GMP MPFR PCRE LIBUNWIND OPENSPECFUN; do

contrib/windows/install-cygwin.ps1

@@ -0,0 +1,9 @@
+$setup = "setup-$env:ARCH.exe".Replace("i686", "x86")
+
+mkdir -Force C:\cygdownloads | Out-Null
+(new-object net.webclient).DownloadFile(
+ "https://cygwin.com/$setup", "C:\cygdownloads\$setup")
+& "C:\cygdownloads\$setup" -q -n -R C:\cygwin-$env:ARCH `
+ -l C:\cygdownloads -s http://mirrors.mit.edu/cygwin -g -I `
+ -P "make,curl,time,p7zip,mingw64-$env:ARCH-gcc-g++,mingw64-$env:ARCH-gcc-fortran" | Where-Object `
+ -FilterScript {$_ -notlike "Installing file *"} | Write-Output