You need the below two lines to your mozconfig to get a 64-bit build. ac_add_options --host=x86_64-pc-mingw32 ac_add_options --target=x86_64-pc-mingw32
This is documented on the below page, albeit not very well. In general, that page could probably use some cleanup to reflect the new reality. https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Windows_Prerequisites#Common_problems_hints_and_restrictions -Ryan On Tue, Jun 20, 2017 at 12:15 PM, Benjamin Smedberg <benja...@smedbergs.us> wrote: > Sorry, my question wasn't clear. > > How does one set in a mozconfig whether they want a 32-bit or 64-bit > build? In the past I've always done that by launching the appropriate > start-shell-msvc2015-x64 batch file. > > --BDS > > On Tue, Jun 20, 2017 at 12:12 PM, Ryan VanderMeulen < > rvandermeu...@mozilla.com> wrote: > >> The build system will automatically use the MSVC 64-bit cross-compile >> toolchain (amd64_x86) when building 32-bit. The logic for this lives in the >> get_vc_paths function in build/moz.configure/toolchain.configure. So >> yeah, things should Just Work depending on whether you have mozconfig set >> to build 32-bit or 64-bit. I'm also going to want to note when this goes >> final that the build system supports detection of both MSVC 2015 and 2017 >> at this point, defaulting to the latter if both are found. It can be >> manually specified via the --with-visual-studio-version option, however. >> >> -Ryan >> >> On Tue, Jun 20, 2017 at 11:47 AM, Benjamin Smedberg < >> benja...@smedbergs.us> wrote: >> >>> >>> >>> On Tue, Jun 20, 2017 at 11:35 AM, Ryan VanderMeulen < >>> rvandermeu...@mozilla.com> wrote: >>> >>>> After a lot of local testing and help from others, I think MozillaBuild >>>> 3.0 is ready to be considered a release candidate. If I don't hear of any >>>> late-breaking blockers, I intend to get this signed and released on Friday. >>>> >>>> Major updates since 2.2.0: >>>> * Windows 7+ 64-bit is officially required to install. >>>> * A number of components were updated to their 64-bit versions, Python >>>> included. >>>> * nodejs and python3 were added. >>>> * NSIS was updated to version 3.01 and older versions were removed. >>>> * start-shell-msvc*.bat were removed in favor of using only >>>> start-shell.bat. The build system handles all compiler and platform SDK >>>> detection now. >>>> >>> >>> As a person who didn't know about start-shell.bat before today: how do I >>> configure a 64-bit or 32-bit build in this new setup? Is this something >>> that would now be in the mozconfig? >>> >>> --BDS >>> >>> >>> >> >
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