From 09e30f3ee6a86bd9de6b82266ada3b1a263d2c02 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Fri, 14 May 2021 18:57:51 +0200
Subject: [PATCH] bpo-44133: Export Py_FrozenMain() symbol

The Python binary now builds the libpython static library using
"-Wl,--whole-archive" linker option to export all symbols exported by
object files. Previously, the "Py_FrozenMain" symbol was not
exported.
---
 Doc/whatsnew/3.11.rst                                        | 5 +++++
 Makefile.pre.in                                              | 2 +-
 .../next/Build/2021-05-14-19-02-04.bpo-44133.XnroKM.rst      | 4 ++++
 3 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Build/2021-05-14-19-02-04.bpo-44133.XnroKM.rst

diff --git a/Doc/whatsnew/3.11.rst b/Doc/whatsnew/3.11.rst
index 503688294072a3..22503f4540f058 100644
--- a/Doc/whatsnew/3.11.rst
+++ b/Doc/whatsnew/3.11.rst
@@ -103,6 +103,11 @@ Optimizations
 Build Changes
 =============
 
+* The Python binary now builds the libpython static library using
+  ``-Wl,--whole-archive`` linker option to export all symbols exported by
+  object files. Previously, the ``Py_FrozenMain`` symbol was not exported.
+  (Contributed by Victor Stinner in :issue:`44133`.)
+
 
 Deprecated
 ==========
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 080318bf454f6c..1eb227b3c5d7c9 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -587,7 +587,7 @@ clinic: check-clean-src $(srcdir)/Modules/_blake2/blake2s_impl.c
 
 # Build the interpreter
 $(BUILDPYTHON):	Programs/python.o $(LIBRARY_DEPS)
-	$(LINKCC) $(PY_CORE_LDFLAGS) $(LINKFORSHARED) -o $@ Programs/python.o $(BLDLIBRARY) $(LIBS) $(MODLIBS) $(SYSLIBS)
+	$(LINKCC) $(PY_CORE_LDFLAGS) $(LINKFORSHARED) -o $@ Programs/python.o -Wl,--whole-archive $(BLDLIBRARY) -Wl,--no-whole-archive $(LIBS) $(MODLIBS) $(SYSLIBS)
 
 platform: $(BUILDPYTHON) pybuilddir.txt
 	$(RUNSHARED) $(PYTHON_FOR_BUILD) -c 'import sys ; from sysconfig import get_platform ; print("%s-%d.%d" % (get_platform(), *sys.version_info[:2]))' >platform
diff --git a/Misc/NEWS.d/next/Build/2021-05-14-19-02-04.bpo-44133.XnroKM.rst b/Misc/NEWS.d/next/Build/2021-05-14-19-02-04.bpo-44133.XnroKM.rst
new file mode 100644
index 00000000000000..c1756cc7ac2d7f
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-05-14-19-02-04.bpo-44133.XnroKM.rst
@@ -0,0 +1,4 @@
+The Python binary now builds the libpython static library using
+``-Wl,--whole-archive`` linker option to export all symbols exported by
+object files. Previously, the ``Py_FrozenMain`` symbol was not exported.
+Patch by Victor Stinner.