Correct the install name for non-framework macOS libPython builds.

Makefile.pre.in

@@ -184,7 +184,7 @@ PYTHONFRAMEWORK=	@PYTHONFRAMEWORK@
 PYTHONFRAMEWORKDIR=	@PYTHONFRAMEWORKDIR@
 PYTHONFRAMEWORKPREFIX=	@PYTHONFRAMEWORKPREFIX@
 PYTHONFRAMEWORKINSTALLDIR= @PYTHONFRAMEWORKINSTALLDIR@
-PYTHONFRAMEWORKINSTALLNAMEPREFIX= @PYTHONFRAMEWORKINSTALLNAMEPREFIX@
+DYLIBINSTALLNAMEPREFIX= @DYLIBINSTALLNAMEPREFIX@
 RESSRCDIR= @RESSRCDIR@
 # Deployment target selected during configure, to be checked
 # by distutils. The export statement is needed to ensure that the
@@ -869,7 +869,7 @@ libpython3.so:	libpython$(LDVERSION).so
 	$(BLDSHARED) $(NO_AS_NEEDED) -o $@ -Wl,-h$@ $^
 
 libpython$(LDVERSION).dylib: $(LIBRARY_OBJS)
-	 $(CC) -dynamiclib $(PY_CORE_LDFLAGS) -undefined dynamic_lookup -Wl,-install_name,$(PYTHONFRAMEWORKINSTALLNAMEPREFIX)/lib/libpython$(LDVERSION).dylib -Wl,-compatibility_version,$(VERSION) -Wl,-current_version,$(VERSION) -o $@ $(LIBRARY_OBJS) $(DTRACE_OBJS) $(SHLIBS) $(LIBC) $(LIBM); \
+	 $(CC) -dynamiclib $(PY_CORE_LDFLAGS) -undefined dynamic_lookup -Wl,-install_name,$(DYLIBINSTALLNAMEPREFIX)/lib/libpython$(LDVERSION).dylib -Wl,-compatibility_version,$(VERSION) -Wl,-current_version,$(VERSION) -o $@ $(LIBRARY_OBJS) $(DTRACE_OBJS) $(SHLIBS) $(LIBC) $(LIBM); \
 
 
 libpython$(VERSION).sl: $(LIBRARY_OBJS)
@@ -900,7 +900,7 @@ $(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK): \
 	$(INSTALL) -d -m $(DIRMODE) $(PYTHONFRAMEWORKDIR)/Versions/$(VERSION)
 	$(CC) -o $(LDLIBRARY) $(PY_CORE_LDFLAGS) -dynamiclib \
 		-all_load $(LIBRARY) \
-		-install_name $(DESTDIR)$(PYTHONFRAMEWORKINSTALLNAMEPREFIX)/$(PYTHONFRAMEWORK) \
+		-install_name $(DESTDIR)$(DYLIBINSTALLNAMEPREFIX)/$(PYTHONFRAMEWORK) \
 		-compatibility_version $(VERSION) \
 		-current_version $(VERSION) \
 		-framework CoreFoundation $(LIBS);

Misc/NEWS.d/next/Build/2024-02-21-11-58-30.gh-issue-115737.dpNl2T.rst

@@ -0,0 +1,2 @@
+The install name for libPython is now correctly set for non-framework macOS
+builds.

configure.ac

@@ -492,7 +492,7 @@ AC_ARG_ENABLE([framework],
 		PYTHONFRAMEWORKDIR=no-framework
 		PYTHONFRAMEWORKPREFIX=
 		PYTHONFRAMEWORKINSTALLDIR=
-		PYTHONFRAMEWORKINSTALLNAMEPREFIX=
+		DYLIBINSTALLNAMEPREFIX=${prefix}
 		RESSRCDIR=
 		FRAMEWORKINSTALLFIRST=
 		FRAMEWORKINSTALLLAST=
@@ -564,7 +564,7 @@ AC_ARG_ENABLE([framework],
 				esac
 
 				prefix=$PYTHONFRAMEWORKINSTALLDIR/Versions/$VERSION
-				PYTHONFRAMEWORKINSTALLNAMEPREFIX=${prefix}
+				DYLIBINSTALLNAMEPREFIX=${prefix}
 				RESSRCDIR=Mac/Resources/framework
 
 				# Add files for Mac specific code to the list of output
@@ -584,7 +584,7 @@ AC_ARG_ENABLE([framework],
 	PYTHONFRAMEWORKDIR=no-framework
 	PYTHONFRAMEWORKPREFIX=
 	PYTHONFRAMEWORKINSTALLDIR=
-	PYTHONFRAMEWORKINSTALLNAMEPREFIX=
+	DYLIBINSTALLNAMEPREFIX=${prefix}
 	RESSRCDIR=
 	FRAMEWORKINSTALLFIRST=
 	FRAMEWORKINSTALLLAST=
@@ -605,7 +605,7 @@ AC_SUBST([PYTHONFRAMEWORKIDENTIFIER])
 AC_SUBST([PYTHONFRAMEWORKDIR])
 AC_SUBST([PYTHONFRAMEWORKPREFIX])
 AC_SUBST([PYTHONFRAMEWORKINSTALLDIR])
-AC_SUBST([PYTHONFRAMEWORKINSTALLNAMEPREFIX])
+AC_SUBST([DYLIBINSTALLNAMEPREFIX])
 AC_SUBST([RESSRCDIR])
 AC_SUBST([FRAMEWORKINSTALLFIRST])
 AC_SUBST([FRAMEWORKINSTALLLAST])