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gh-141926 : Add --enable-cross-run configure option to avoid clearing RUNSHARED on cross-compile #141927

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gh-141926 : Add --enable-cross-run configure option to avoid clearing RUNSHARED on cross-compile #141927

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14 changes: 14 additions & 0 deletions Doc/using/configure.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1210,6 +1210,20 @@ the version of the cross compiled host Python.

.. versionadded:: 3.11

.. option:: --enable-cross-run

Enable running the target CPython binary on the build host during
cross-compilation.

By default, the build system assumes that target binaries cannot be executed
on the build host when cross-compiling which can disable optimizations such
as PGO.

When `--enable-cross-run` is used, the build system may attempt to execute
the target binaries, which is appropriate for situations where emulated
execution is transparently available.

.. versionadded:: 3.15

Cross compiling example::

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Build/2025-11-24-17-01-16.gh-issue-141926.Rcxj2J.rst
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@@ -0,0 +1,2 @@
Add ```--enable-cross-run`` to allow execution of the target binary (e.g.,
for PGO) during cross-compilation.
27 changes: 26 additions & 1 deletion configure
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13 changes: 12 additions & 1 deletion configure.ac
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Expand Up @@ -1630,8 +1630,19 @@ else # shared is disabled
fi
AC_MSG_RESULT([$LDLIBRARY])

# Check for --enable-cross-run
AC_ARG_ENABLE([cross-run],
[AS_HELP_STRING([--enable-cross-run],
[allow running target binaries during cross-compilation (default is no)])],
[],
[enable_cross_run=no])

if test "$cross_compiling" = yes; then
RUNSHARED=
AC_MSG_CHECKING([whether to keep RUNSHARED for cross build])
AS_IF([test "$enable_cross_run" = yes],
[AC_MSG_RESULT([yes (--enable-cross-run)])],
[RUNSHARED=
AC_MSG_RESULT([no])])
fi

# HOSTRUNNER - Program to run CPython for the host platform
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