Compiling Inkscape on Windows 64-bit
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Get MinGW 64-bit from here: MinGW-w64 on Sourceforge, taking the package from the Mingw-builds Project.
The version you need is POSIX with SJLJ exception handling, because inkscape-devlibs64 has been compiled with SJLJ exception handling, and POSIX is needed for C++11 thread capabilities.
Direct link to what I got: x86_64-4.9.0-release-posix-sjlj-rt_v3-rev1.7z
Checkout lp:inkscape-devlibs64 into, e.g., c:\devlibs64.
Also see: Inkscape Devlibs 64-bit
set the paths correctly in mingwenv.bat! Specifically, I have:
IF "%DEVLIBS_PATH%"=="" set DEVLIBS_PATH=c:\devlibs64 IF "%MINGW_PATH%"=="" set MINGW_PATH=C:\mingw64\mingw64_posix
build using buildtool as usual, but with build-x64.xml:
btool -file build-x64.xml
For now a small fixup is needed. In the inkscape folder created after the build (where you build is installed), you have to remove the \share\icons\hicolor folder.