config.h not found

[gvanem]

Hello Ruski.

Since the official iconv build method suck so hard for Windows/MSVC, I came across your package.
You write:

and add it to the system/build variables:
INCLUDE = C:\git\iconv-for-windows\include

But while building it too? It should at least find it' own files while building itself IMHO.
On the cmd-line in <iconv-for-windows-root>, I did:

msbuild -p:Configuration=Release LibIconv.sln

which errors:

ClCompile:
  f:\gv\VC_2015\bin\CL.exe /c /Zi /nologo /W3 /WX- /O2 /Oi /Oy- /GL /D WIN32 /D NDEBUG 
/D _WINDOWS /D _USRDLL /D BUILDI NG_LIBICONV /D BUILDING_LIBCHARSET /D LIBICONV_EXPORTS /D _WINDLL /D _UNICODE /D UNICODE /GF /Gm- /EHsc /MT /GS /Gy /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /Fo"F:\MingW32\src\libiconv-for-windows\obj\libiconv\Release_Win32\\"
  /Fd"F:\MingW32\src\libiconv-for-windows\obj\libiconv\Release_Win32\vc140.pdb" /Gd /TC /analyze- /errorReport:queue iconv.c localcharset.c relocatable.c iconv.c
iconv.c(25): fatal error C1083: Cannot open include file: 'config.h': No such file or directory 

I tried to fix it in libiconv\libiconv.vcxproj, but failed (*.vcxproj suck equally much as auto-tools...)

EDIT:

This works though:

set INCLUDE=%INCLUDE%;F:\MingW32\src\libiconv-for-windows\include & ^
   msbuild -p:Configuration=Release LibIconv.sln

(realising that msbuild does a cd inside itself. Yuk!).

But I don't like it. As I said, a package should find it's own files w/o setting INCLUDE etc.