https://github.com/python/cpython/commit/bde12919522b0c40fd9eaa2b2681695166497aba
commit: bde12919522b0c40fd9eaa2b2681695166497aba
branch: main
author: Brett Cannon <[email protected]>
committer: brettcannon <[email protected]>
date: 2025-09-05T15:48:16-07:00
summary:
GH-95952: Require setting `HOSTRUNNER` when cross compiling for WASI (#138203)
macOS by default doesn't have the requisite CLI tools to make a default value
easy. Plus Tools/wasm/wasi takes care of setting HOSTRUNNER.
files:
A Misc/NEWS.d/next/Build/2025-08-27-11-32-02.gh-issue-95952.KSymc7.rst
M configure
M configure.ac
diff --git
a/Misc/NEWS.d/next/Build/2025-08-27-11-32-02.gh-issue-95952.KSymc7.rst
b/Misc/NEWS.d/next/Build/2025-08-27-11-32-02.gh-issue-95952.KSymc7.rst
new file mode 100644
index 00000000000000..0e4b4615342b24
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2025-08-27-11-32-02.gh-issue-95952.KSymc7.rst
@@ -0,0 +1,5 @@
+When cross-compiling for WASI, require that the HOSTRUNNER environment
+variable be explicitly set.
+
+This was needed as macOS lacks the appropriate CLI tools to set a reasonable
+default.
diff --git a/configure b/configure
index bdeab8a6d126a3..7dd333690a3a2c 100755
--- a/configure
+++ b/configure
@@ -7903,8 +7903,10 @@ then :
as_fn_append HOSTRUNNER " --experimental-wasm-memory64"
fi
;; #(
- WASI) :
- HOSTRUNNER='wasmtime run --wasm max-wasm-stack=16777216 --wasi preview2=n
--env PYTHONPATH=/$(shell realpath --relative-to $(abs_srcdir)
$(abs_builddir))/$(shell cat pybuilddir.txt):/Lib --dir $(srcdir)::/' ;; #(
+ WASI) :
+
+ as_fn_error $? "HOSTRUNNER must be set when cross-compiling to WASI"
"$LINENO" 5
+ ;; #(
*) :
HOSTRUNNER=''
;;
diff --git a/configure.ac b/configure.ac
index 991fa40746be78..8fc8f1eced20cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1636,10 +1636,9 @@ then
HOSTRUNNER="$NODE"
AS_VAR_IF([host_cpu], [wasm64], [AS_VAR_APPEND([HOSTRUNNER], ["
--experimental-wasm-memory64"])])
],
- dnl TODO: support other WASI runtimes
- dnl wasmtime starts the process with "/" as CWD. For OOT builds add the
- dnl directory containing _sysconfigdata to PYTHONPATH.
- [WASI], [HOSTRUNNER='wasmtime run --wasm max-wasm-stack=16777216 --wasi
preview2=n --env PYTHONPATH=/$(shell realpath --relative-to $(abs_srcdir)
$(abs_builddir))/$(shell cat pybuilddir.txt):/Lib --dir $(srcdir)::/'],
+ [WASI], [
+ AC_MSG_ERROR([HOSTRUNNER must be set when cross-compiling to WASI])
+ ],
[HOSTRUNNER='']
)
fi
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