README.MSVC.md: Update build instructions

Make some necessary updates for building against SpiderMonkey 102.x.

1 files changed, 15 insertions, 3 deletions

diff --git a/README.MSVC.md b/README.MSVC.md
index df640ce4..ffb356d4 100644
--- a/README.MSVC.md
+++ b/README.MSVC.md
@@ -59,7 +59,6 @@ sources.  A sample content of the .mozconfig file can be added as follows:
 ```

 ac_add_options --enable-application=js

 mk_add_options MOZ_MAKE_FLAGS=-j12

-mk_add_options JS_STANDALONE=1

 ac_add_options --target=x86_64-pc-mingw32

 ac_add_options --host=x86_64-pc-mingw32

 ac_add_options --disable-tests

@@ -72,7 +71,6 @@ ac_add_options --prefix=c:/software.b/mozjs102.bin
 An explanation of the lines above:

 *  `ac_add_options --enable-application=js`: This line is absolutely required, to build SpiderMonkey standalone

 *  `mk_add_options MOZ_MAKE_FLAGS=-j12`:  MOZ_MAKE_FLAGS=-jX means X number of parallel processes for the build

-*  `mk_add_options JS_STANDALONE=1`: Enforce building SpiderMonkey standalone (could be optional)

 *  `ac_add_options --target=x86_64-pc-mingw32`: Target architecture, replace `x86_64` with `aarch64` for ARM64 builds, and with `i686` for 32-bit x86 builds.

 *  `ac_add_options --host=x86_64-pc-mingw32`: Use this as-is, unless building on a 32-bit compiler (replace `x86_64` with `i686`; not recommended)

 *  `ac_add_options --disable-tests`: Save some build time

@@ -85,7 +83,10 @@ If your GJS build crashes upon launch, use Dependency Walker to ensure that
 mozjs-102.dll does not depend on mozglue.dll!  If it does, or if GJS fails to

 link with missing arena_malloc() and friends symbols, you have built SpiderMoney

 incorrectly and will need to rebuild SpiderMonkey (with the build options as

-noted above) and retry the build.

+noted above) and retry the build.  Because SpiderMonkey needs to be built

+without jemalloc, enclose the entire `DllMain()` implementation in 

+`$(srcroot)/js/src/jsapi.cpp` with `#if 0` ... `#endif`, otherwise 

+SpiderMonkey will fail to link.

 

 Please also check that `--enable-optimize` is *not* used with `--enable-debug`.

 You should explicitly enable one and disable the other, as `--enable-debug`

@@ -122,6 +123,17 @@ $(buildroot)/dist/bin, and you will need to look for the following .lib files:
 -mozjs-102.lib

 -js_static.lib (optional)

 

+Due to some bugs that are not yet resolved in upstream SpiderMonkey 102.x,

+you may need to do the following after running `./mach build install` and

+before attempting to build GJS itself:

+

+* Copy `$(builddir)/dist/include/js/ProfilingCategoryList.h` to

+  `$(PREFIX)\include\mozjs-102\js`.

+

+* Change `$(PREFIX)\include\mozjs-102\mozilla\EnumSet.h` and change line

+  329 from `static constexpr size_t kMaxBits = EnumSet().MaxBits();`

+  to `size_t kMaxBits = EnumSet().MaxBits();`.

+

 You may want to put the .lib's and DLLs/EXEs into $(PREFIX)\lib and 

 $(PREFIX)\bin respectively, and put the headers into

 $(PREFIX)\include\mozjs-102 for convenience.