From: Zanie Blue <contact@zanie.dev>
Date: Fri, 5 Dec 2025 02:15:04 +0000 (-0600)
Subject: gh-141926: Do not unset `RUNSHARED` when cross-compiling (#141958)
X-Git-Tag: v3.15.0a3~203
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=128d31637e8bf23f086d2a09081525adeeb1f65a;p=thirdparty%2FPython%2Fcpython.git

gh-141926: Do not unset `RUNSHARED` when cross-compiling (#141958)
---

diff --git a/Misc/NEWS.d/next/Build/2025-11-25-13-17-47.gh-issue-141926.KmuM2h.rst b/Misc/NEWS.d/next/Build/2025-11-25-13-17-47.gh-issue-141926.KmuM2h.rst
new file mode 100644
index 000000000000..dab79ba5cf94
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2025-11-25-13-17-47.gh-issue-141926.KmuM2h.rst
@@ -0,0 +1,4 @@
+``RUNSHARED`` is no longer cleared when cross-compiling. Previously,
+``RUNSHARED`` was cleared when cross-compiling, which breaks PGO when using
+``--enabled-shared`` on systems where the cross-compiled CPython is otherwise
+executable (e.g., via transparent emulation).
diff --git a/configure b/configure
index 620878bb1813..1561f7f4134a 100755
--- a/configure
+++ b/configure
@@ -7808,10 +7808,6 @@ fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LDLIBRARY" >&5
 printf "%s\n" "$LDLIBRARY" >&6; }
 
-if test "$cross_compiling" = yes; then
-  RUNSHARED=
-fi
-
 # HOSTRUNNER - Program to run CPython for the host platform
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking HOSTRUNNER" >&5
 printf %s "checking HOSTRUNNER... " >&6; }
diff --git a/configure.ac b/configure.ac
index 8ef479fe3203..f2a7319d22d2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1639,10 +1639,6 @@ else # shared is disabled
 fi
 AC_MSG_RESULT([$LDLIBRARY])
 
-if test "$cross_compiling" = yes; then
-  RUNSHARED=
-fi
-
 # HOSTRUNNER - Program to run CPython for the host platform
 AC_MSG_CHECKING([HOSTRUNNER])
 if test -z "$HOSTRUNNER"