bpo-45548: makesetup improvements (GH-29225)

* record which modules are build as shared extensions
* put object files in same directory as source files
* remove dependency on deleted _math.c

Signed-off-by: Christian Heimes <christian@python.org>

Author: tiran

Makefile.pre.in

@@ -21,6 +21,7 @@
 # === Variables set by makesetup ===
 
 MODBUILT_NAMES=    _MODBUILT_NAMES_
+MODSHARED_NAMES=   _MODSHARED_NAMES_
 MODDISABLED_NAMES= _MODDISABLED_NAMES_
 MODOBJS=           _MODOBJS_
 MODLIBS=           _MODLIBS_
@@ -2120,8 +2121,8 @@ Python/thread.o: @THREADHEADERS@ $(srcdir)/Python/condvar.h
 ##########################################################################
 # Module dependencies
 
-MODULE_CMATH_DEPS=$(srcdir)/Modules/_math.h $(srcdir)/Modules/_math.c
-MODULE_MATH_DEPS=$(srcdir)/Modules/_math.h $(srcdir)/Modules/_math.c
+MODULE_CMATH_DEPS=$(srcdir)/Modules/_math.h
+MODULE_MATH_DEPS=$(srcdir)/Modules/_math.h
 MODULE_PYEXPAT_DEPS=$(srcdir)/Modules/expat/ascii.h $(srcdir)/Modules/expat/asciitab.h $(srcdir)/Modules/expat/expat.h $(srcdir)/Modules/expat/expat_config.h $(srcdir)/Modules/expat/expat_external.h $(srcdir)/Modules/expat/internal.h $(srcdir)/Modules/expat/latin1tab.h $(srcdir)/Modules/expat/utf8tab.h $(srcdir)/Modules/expat/xmlrole.h $(srcdir)/Modules/expat/xmltok.h $(srcdir)/Modules/expat/xmltok_impl.h
 MODULE_UNICODEDATA_DEPS=$(srcdir)/Modules/unicodedata_db.h $(srcdir)/Modules/unicodename_db.h
 MODULE__BLAKE2_DEPS=$(srcdir)/Modules/_blake2/impl/blake2-config.h $(srcdir)/Modules/_blake2/impl/blake2-dispatch.c $(srcdir)/Modules/_blake2/impl/blake2-impl.h $(srcdir)/Modules/_blake2/impl/blake2-kat.h $(srcdir)/Modules/_blake2/impl/blake2.h $(srcdir)/Modules/_blake2/impl/blake2b-load-sse2.h $(srcdir)/Modules/_blake2/impl/blake2b-load-sse41.h $(srcdir)/Modules/_blake2/impl/blake2b-ref.c $(srcdir)/Modules/_blake2/impl/blake2b-round.h $(srcdir)/Modules/_blake2/impl/blake2b-test.c $(srcdir)/Modules/_blake2/impl/blake2b.c $(srcdir)/Modules/_blake2/impl/blake2bp-test.c $(srcdir)/Modules/_blake2/impl/blake2bp.c $(srcdir)/Modules/_blake2/impl/blake2s-load-sse2.h $(srcdir)/Modules/_blake2/impl/blake2s-load-sse41.h $(srcdir)/Modules/_blake2/impl/blake2s-load-xop.h $(srcdir)/Modules/_blake2/impl/blake2s-ref.c $(srcdir)/Modules/_blake2/impl/blake2s-round.h $(srcdir)/Modules/_blake2/impl/blake2s-test.c $(srcdir)/Modules/_blake2/impl/blake2s.c $(srcdir)/Modules/_blake2/impl/blake2sp-test.c $(srcdir)/Modules/_blake2/impl/blake2sp.c $(srcdir)/Modules/hashlib.h

Modules/makesetup

@@ -31,6 +31,7 @@
 # - insert an identifying comment at the start
 # - replace _MODBUILT_NAMES_ by the list of *static* and *shared* modules
 #   from Setup
+# - replace _MODBSHARED_NAMES_ by the list of *shared* modules from Setup
 # - replace _MODDISABLED_NAMES_ by the list of *disabled* modules from Setup
 # - replace _MODOBJS_ by the list of objects from Setup (except for
 #   Setup files after a -n option)
@@ -114,6 +115,7 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |
 " >$rulesf
 	DEFS=
 	BUILT=
+	BUILT_SHARED=
 	DISABLED=
 	MODS=
 	SHAREDMODS=
@@ -222,7 +224,10 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |
 			*.m)   obj=`basename $src .m`.o; cc='$(CC)';; # Obj-C
 			*)     continue;;
 			esac
-			obj="$srcdir/$obj"
+			case $src in
+			*/*) obj="$srcdir/`dirname $src`/$obj";;
+			*)   obj="$srcdir/$obj";;
+			esac
 			objs="$objs $obj"
 			case $src in
 			glmodule.c) ;;
@@ -246,7 +251,10 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |
 		do
 			file="$srcdir/$mod\$(EXT_SUFFIX)"
 			case $doconfig in
-			no)	SHAREDMODS="$SHAREDMODS $file";;
+			no)
+				SHAREDMODS="$SHAREDMODS $file"
+				BUILT_SHARED="$BUILT_SHARED $mod"
+				;;
 			esac
 			rule="$file: $objs"
 			rule="$rule; \$(BLDSHARED) $objs $libs $ExtraLibs -o $file"
@@ -296,6 +304,7 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |
 		str="# Generated automatically from $makepre by makesetup."
 		echo "$str" >>$sedf
 		echo "s%_MODBUILT_NAMES_%$BUILT%" >>$sedf
+		echo "s%_MODSHARED_NAMES_%$BUILT_SHARED%" >>$sedf
 		echo "s%_MODDISABLED_NAMES_%$DISABLED%" >>$sedf
 		echo "s%_MODOBJS_%$OBJS%" >>$sedf
 		echo "s%_MODLIBS_%$LIBS%" >>$sedf