The latest release of Visual Studio 2022 version 17.6.3 prints the following error when compiling WebKit on Windows for the gradle task ':web:compileNativeWin':

  fmtable.cpp(59): error C2666: 'icu_73::Measure::operator ==':
  overloaded functions have similar conversions

The build fails due to the error.

SYSTEM / OS / JAVA RUNTIME INFORMATION

The following build tools were used:

- CMake version 3.26.4
- Visual Studio Community 2022 version 17.6.3, build number 17.6.33801.468
- OpenJDK Runtime Environment (build 19.0.2+7-44)
- Apache Ant(TM) version 1.10.13 compiled on January 4 2023

STEPS TO REPRODUCE

Build a simulated release of JavaFX as follows:

$ bash gradlew --no-daemon -PCONF=Release -PPROMOTED_BUILD_NUMBER=12 \
  -PHUDSON_BUILD_NUMBER=101 -PHUDSON_JOB_NAME=jfx -PCOMPILE_WEBKIT=true \
  -PCOMPILE_MEDIA=true -PBUILD_LIBAV_STUBS=true sdk jmods javadoc

EXPECTED RESULTS

The build should succeed.

ACTUAL RESULT

The build fails with the messages:

----------
> Task :web:compileNativeWin FAILED

FAILURE: Build failed with an exception.

* Where:
Build file 'C:\cygwin64\home\john\src\jfx\build.gradle' line: 3655

* What went wrong:
Execution failed for task ':web:compileNativeWin'.
> Process 'command 'perl'' finished with non-zero exit value 1

  ...

BUILD FAILED in 9m 43s
65 actionable tasks: 65 executed
----------

See the attached log file for details.

SOURCE CODE FOR AN EXECUTABLE TEST CASE

None.

WORKAROUND

One workaround is to downgrade to Visual Studio Build Tools 2022 version 17.5.5, build number 17.5.33627.172, which builds the WebKit library without errors. This version is available on the following page in the table entry dated May 1, 2023:

Visual Studio 2022 Release History: Fixed version bootstrappers
https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-history#fixed-version-bootstrappers