Add Visual Studio 2008 support

This will allow outputting builds of the libraries for building lxml for
Python 2.6 or Python 2.7.

Author: TBBle

appveyor.yml

@@ -1,18 +1,35 @@
 environment:
   matrix:
   - Architecture: x86
+    Compiler: vs2015
   - Architecture: x64
+    Compiler: vs2015
+  - Architecture: x86
+    Compiler: vs2008
+  - Architecture: x64
+    Compiler: vs2008
+    PYTHON_ARCH: 64
+    PATCH_VS2008: True
 install:
 - cmd: git submodule update --init --recursive
 - ps: install-module pscx -scope CurrentUser
+- ps: >-
+    if ($env:PATCH_VS2008 -eq 'True') {
+        # http://scikit-ci-addons.readthedocs.io/en/latest/addons.html#patch-vs2008-py
+        C:\Python27\python -m pip install scikit-ci-addons
+        C:\Python27\python -m ci_addons appveyor/patch_vs2008
+        # http://help.appveyor.com/discussions/kb/38-visual-studio-2008-64-bit-builds
+        Copy-Item "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\vcvars64.bat" "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\amd64\vcvarsamd64.bat"
+    }
 build: off
 build_script:
 - ps: >-
-    if ($env:Architecture -eq 'x64') {
-       .\build.ps1 -x64
-    } else {
-       .\build.ps1
-    }
+    $x64param = if ($env:Architecture -eq 'x64') { $true } else { $false }
+
+    $vs2008param = if ($env:Compiler -eq 'vs2008') { $true } else { $false }
+
+    .\build.ps1 -x64:$x64param -vs2008:$vs2008param
+
 test: off
 test_script:
 - ps: Get-ChildItem dist\*.zip | % { Push-AppveyorArtifact $_.FullName -FileName $_.Name }

build.ps1

@@ -1,25 +1,32 @@
 <#
 This script builds libiconv,libxml2 and libxslt
 #>
-Param([switch]$x64)
+Param(
+    [switch]$x64,
+    [switch]$vs2008
+)
 
 $ErrorActionPreference = "Stop"
 Import-Module Pscx
 
 $x64Dir = If($x64) { "\x64" } Else { "" }
 $distname = If($x64) { "win64" } Else { "win32" }
+If($vs2008) { $distname = "vs2008.$distname" }
+$vcvarsarch = If($x64) { "amd64" } Else { "x86" }
+$vsver = If($vs2008) { "90" } Else { "140" }
 
 Set-Location $PSScriptRoot
 
-# Change theset two lines to change VS version
-if($x64) {
-    Import-VisualStudioVars -VisualStudioVersion 140 -Architecture x64
+Import-VisualStudioVars -VisualStudioVersion $vsver -Architecture $vcvarsarch
+
+if($vs2008) {
+    Set-Location .\libiconv\MSVC9
+    $vcarch = If($x64) { "x64" } Else {"Win32"}
+    vcbuild libiconv_static\libiconv_static.vcproj "Release|$vcarch"
 } else {
-    Import-VisualStudioVars -VisualStudioVersion 140 -Architecture x86
+    Set-Location .\libiconv\MSVC14
+    msbuild libiconv.sln /p:Configuration=Release /t:libiconv_static
 }
-
-Set-Location .\libiconv\MSVC14
-msbuild libiconv.sln /p:Configuration=Release /t:libiconv_static
 $iconvLib = Join-Path (pwd) libiconv_static$x64Dir\Release
 $iconvInc = Join-Path (pwd) ..\source\include
 Set-Location ..\..