Issue #10656: Merge AIX build fix from 3.5

Makefile.pre.in

@@ -1421,7 +1421,7 @@ libainstall:	all python-config
 		$(INSTALL_SCRIPT) $(srcdir)/Modules/makexp_aix	\
 				$(DESTDIR)$(LIBPL)/makexp_aix;		\
 		echo "$(LIBPL)/makexp_aix";			\
-		$(INSTALL_SCRIPT) $(srcdir)/Modules/ld_so_aix	\
+		$(INSTALL_SCRIPT) Modules/ld_so_aix	\
 				$(DESTDIR)$(LIBPL)/ld_so_aix;		\
 		echo "$(LIBPL)/ld_so_aix";			\
 		echo; echo "See Misc/AIX-NOTES for details.";	\

Misc/ACKS

@@ -227,6 +227,7 @@ Arnaud Calmettes
 Daniel Calvelo
 Tony Campbell
 Brett Cannon
+Tristan Carel
 Mike Carlton
 Pierre Carrier
 Terry Carroll
@@ -581,6 +582,7 @@ Travis B. Hartwell
 Larry Hastings
 Tim Hatch
 Shane Hathaway
+Michael Haubenwallner
 Janko Hauser
 Rycharde Hawkes
 Ben Hayden

Misc/NEWS

@@ -90,6 +90,9 @@ Tests
 Build
 -----
 
+- Issue #10656: Fix out-of-tree building on AIX.  Patch by Tristan Carel and
+  Michael Haubenwallner.
+
 - Issue #26359: Rename --with-optimiations to --enable-optimizations.
 
 - Issue #28676: Prevent missing 'getentropy' declaration warning on macOS.

Modules/ld_so_aix.in

@@ -70,6 +70,7 @@ if test ! -n "$*"; then
 fi
 
 makexp=`dirname $0`/makexp_aix
+test -x "${makexp}" || makexp="@abs_srcdir@/makexp_aix"
 
 # Check for existence of compiler.
 CC=$1; shift

configure

@@ -9165,7 +9165,7 @@ if test -z "$LDSHARED"
 then
 	case $ac_sys_system/$ac_sys_release in
 	AIX*)
-		BLDSHARED="\$(srcdir)/Modules/ld_so_aix \$(CC) -bI:\$(srcdir)/Modules/python.exp"
+		BLDSHARED="Modules/ld_so_aix \$(CC) -bI:Modules/python.exp"
 		LDSHARED="\$(LIBPL)/ld_so_aix \$(CC) -bI:\$(LIBPL)/python.exp"
 		;;
 	IRIX/5*) LDSHARED="ld -shared";;

configure.ac

@@ -2409,7 +2409,7 @@ if test -z "$LDSHARED"
 then
 	case $ac_sys_system/$ac_sys_release in
 	AIX*)
-		BLDSHARED="\$(srcdir)/Modules/ld_so_aix \$(CC) -bI:\$(srcdir)/Modules/python.exp"
+		BLDSHARED="Modules/ld_so_aix \$(CC) -bI:Modules/python.exp"
 		LDSHARED="\$(LIBPL)/ld_so_aix \$(CC) -bI:\$(LIBPL)/python.exp"
 		;;
 	IRIX/5*) LDSHARED="ld -shared";;