https://github.com/python/cpython/commit/5918085bb6f4a3a48193cacb9bb99b044d4e0452
commit: 5918085bb6f4a3a48193cacb9bb99b044d4e0452
branch: main
author: Yaksh Bariya <[email protected]>
committer: freakboy3742 <[email protected]>
date: 2026-08-03T14:52:26+08:00
summary:

GH-138800: Fix variable substitution in python3.pc for Android (#144776)

Clarifies the difference between LIBPYTHON, which is the library name,
and the flags needed to build modules, which also need the linking path.

Co-authored-by: Ɓukasz Langa <[email protected]>
Co-authored-by: Malcolm Smith <[email protected]>

files:
A Misc/NEWS.d/next/Build/2026-03-07-02-09-57.gh-issue-138800.VD8qbz.rst
M Makefile.pre.in
M Modules/makesetup
M configure
M configure.ac

diff --git a/Makefile.pre.in b/Makefile.pre.in
index 465981f8fd4deda..46fa26e01572cc2 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -285,6 +285,7 @@ DIST=               $(DISTFILES) $(DISTDIRS)
 LIBRARY=       @LIBRARY@
 LDLIBRARY=      @LDLIBRARY@
 BLDLIBRARY=     @BLDLIBRARY@
+MODULE_LDFLAGS_SHARED=$(if $(LIBPYTHON),$(BLDLIBRARY))
 PY3LIBRARY=     @PY3LIBRARY@
 DLLLIBRARY=    @DLLLIBRARY@
 LDLIBRARYDIR=   @LDLIBRARYDIR@
diff --git 
a/Misc/NEWS.d/next/Build/2026-03-07-02-09-57.gh-issue-138800.VD8qbz.rst 
b/Misc/NEWS.d/next/Build/2026-03-07-02-09-57.gh-issue-138800.VD8qbz.rst
new file mode 100644
index 000000000000000..54b084d9d61277f
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2026-03-07-02-09-57.gh-issue-138800.VD8qbz.rst
@@ -0,0 +1 @@
+Fix library name in python3.pc on Android.
diff --git a/Modules/makesetup b/Modules/makesetup
index 104c824b846540e..8b28946608b5762 100755
--- a/Modules/makesetup
+++ b/Modules/makesetup
@@ -277,7 +277,7 @@ sed -e 's/[         ]*#.*//' -e '/^[        ]*$/d' |
                                ;;
                        esac
                        rule="$file: $objs \$(MODULE_${mods_upper}_LDEPS)"
-                       rule="$rule; \$(BLDSHARED) $objs $libs \$(LIBPYTHON) -o 
$file"
+                       rule="$rule; \$(BLDSHARED) $objs $libs 
\$(MODULE_LDFLAGS_SHARED) -o $file"
                        echo "$rule" >>$rulesf
                done
        done
diff --git a/configure b/configure
index 2c82da923f68d4a..836eb88e4cdb6e5 100755
--- a/configure
+++ b/configure
@@ -27990,18 +27990,21 @@ LDVERSION='$(VERSION)$(ABIFLAGS)'
 printf "%s\n" "$LDVERSION" >&6; }
 
 # Configure the flags and dependencies used when compiling shared modules.
-# Do not rename LIBPYTHON - it's accessed via sysconfig by package build
-# systems (e.g. Meson) to decide whether to link extension modules against
-# libpython.
 
 
 MODULE_DEPS_SHARED='$(MODULE_DEPS_STATIC) $(EXPORTSYMS)'
+
+# On most platforms, extension modules aren't linked against libpython, so
+# LIBPYTHON must be empty.
 LIBPYTHON=''
 
 # On Android and Cygwin the shared libraries must be linked with libpython.
+# LIBPYTHON is used by python-config, python3.pc, the commands for building the
+# stdlib's own extension modules, and external package build systems via
+# sysconfig, so its value must be suitable for all those contexts.
 if test "$PY_ENABLE_SHARED" = "1" && ( test -n "$ANDROID_API_LEVEL" || test 
"$MACHDEP" = "cygwin"); then
   MODULE_DEPS_SHARED="$MODULE_DEPS_SHARED \$(LDLIBRARY)"
-  LIBPYTHON="\$(BLDLIBRARY)"
+  LIBPYTHON="-lpython${VERSION}${ABIFLAGS}"
 fi
 
 # On iOS the shared libraries must be linked with the Python framework
diff --git a/configure.ac b/configure.ac
index 771260c76b7f094..3a9841b1e7d0747 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6669,18 +6669,21 @@ LDVERSION='$(VERSION)$(ABIFLAGS)'
 AC_MSG_RESULT([$LDVERSION])
 
 # Configure the flags and dependencies used when compiling shared modules.
-# Do not rename LIBPYTHON - it's accessed via sysconfig by package build
-# systems (e.g. Meson) to decide whether to link extension modules against
-# libpython.
 AC_SUBST([MODULE_DEPS_SHARED])
 AC_SUBST([LIBPYTHON])
 MODULE_DEPS_SHARED='$(MODULE_DEPS_STATIC) $(EXPORTSYMS)'
+
+# On most platforms, extension modules aren't linked against libpython, so
+# LIBPYTHON must be empty.
 LIBPYTHON=''
 
 # On Android and Cygwin the shared libraries must be linked with libpython.
+# LIBPYTHON is used by python-config, python3.pc, the commands for building the
+# stdlib's own extension modules, and external package build systems via
+# sysconfig, so its value must be suitable for all those contexts.
 if test "$PY_ENABLE_SHARED" = "1" && ( test -n "$ANDROID_API_LEVEL" || test 
"$MACHDEP" = "cygwin"); then
   MODULE_DEPS_SHARED="$MODULE_DEPS_SHARED \$(LDLIBRARY)"
-  LIBPYTHON="\$(BLDLIBRARY)"
+  LIBPYTHON="-lpython${VERSION}${ABIFLAGS}"
 fi
 
 # On iOS the shared libraries must be linked with the Python framework

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