Revert "bpo-26317: Support OBJC and OBJCXX configure command line variables (GH-20176)" (GH-20182)

This reverts commit 0da546665075aefbb476e192ed64122d340164f4.

The commit is causing make failures on a FreeBSD buildbot.
Due to the imminent 3.9.0b1 cutoff, revert this commit for
now pending further investigation.

10 files changed, 15 insertions, 670 deletions

diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
index 9e42e9d..66e7c64 100644
--- a/Doc/whatsnew/3.9.rst
+++ b/Doc/whatsnew/3.9.rst
@@ -892,14 +892,6 @@ Build Changes
   functions are now required to build Python.
   (Contributed by Victor Stinner in :issue:`39395`.)
 
-* The ``OBJC`` and ``OBJCXX`` standard command line options for the configure
-  script are now supported. This allows building fot macOS with a third-party
-  compiler, like GNU `gcc`, for everything except for the several
-  system-specific source files that need system headers that require the
-  Apple-supplied compile chain (e.g. the ``_scproxy`` helper module and
-  ``PythonLauncher.app``).
-  (Contributed by Jeffrey Kintscher in :issue:`26317`.)
-
 
 C API Changes
 =============
diff --git a/Mac/Makefile.in b/Mac/Makefile.in
index db59fc5..0b32673 100644
--- a/Mac/Makefile.in
+++ b/Mac/Makefile.in
@@ -21,7 +21,6 @@ PYTHONFRAMEWORK=@PYTHONFRAMEWORK@
 PYTHONFRAMEWORKIDENTIFIER=@PYTHONFRAMEWORKIDENTIFIER@
 LIPO_32BIT_FLAGS=@LIPO_32BIT_FLAGS@
 CC=@CC@
-OBJC=@OBJC@
 MACOSX_DEPLOYMENT_TARGET=@CONFIGURE_MACOSX_DEPLOYMENT_TARGET@
 export MACOSX_DEPLOYMENT_TARGET
 
diff --git a/Mac/PythonLauncher/Makefile.in b/Mac/PythonLauncher/Makefile.in
index 1553b75..4c05f26 100644
--- a/Mac/PythonLauncher/Makefile.in
+++ b/Mac/PythonLauncher/Makefile.in
@@ -1,7 +1,5 @@
 CC=@CC@
 LD=@CC@
-OBJC=@OBJC@
-OBJCFLAFS=@OBJCFLAGS@
 BASECFLAGS=@BASECFLAGS@
 OPT=@OPT@
 CFLAGS=@CFLAGS@ $(BASECFLAGS) $(OPT)
@@ -54,25 +52,25 @@ Python\ Launcher.app:  Info.plist \
 	cp -R $(srcdir)/English.lproj "Python Launcher.app/Contents/Resources"
 
 FileSettings.o: $(srcdir)/FileSettings.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/FileSettings.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/FileSettings.m
 
 MyAppDelegate.o: $(srcdir)/MyAppDelegate.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/MyAppDelegate.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/MyAppDelegate.m
 
 MyDocument.o: $(srcdir)/MyDocument.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/MyDocument.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/MyDocument.m
 
 PreferencesWindowController.o: $(srcdir)/PreferencesWindowController.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/PreferencesWindowController.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/PreferencesWindowController.m
 
 doscript.o: $(srcdir)/doscript.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/doscript.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/doscript.m
 
 main.o: $(srcdir)/main.m
-	$(OBJC) $(CFLAGS) -o $@ -c $(srcdir)/main.m
+	$(CC) $(CFLAGS) -o $@ -c $(srcdir)/main.m
 
 Python\ Launcher: $(OBJECTS)
-	$(OBJC) $(LDFLAGS) -o "Python Launcher" $(OBJECTS) -framework AppKit -framework Carbon
+	$(CC) $(LDFLAGS) -o "Python Launcher" $(OBJECTS) -framework AppKit -framework Carbon
 
 Info.plist: $(srcdir)/Info.plist.in
 	sed 's/%VERSION%/'"`$(RUNSHARED) $(BUILDPYTHON) -c 'import platform; print(platform.python_version())'`"'/g' < $(srcdir)/Info.plist.in > Info.plist
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 339cbfd..dbfd805 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -35,7 +35,6 @@ abs_builddir=	@abs_builddir@
 
 CC=		@CC@
 CXX=		@CXX@
-OBJC=		@OBJC@
 MAINCC=		@MAINCC@
 LINKCC=		@LINKCC@
 AR=		@AR@
@@ -614,22 +613,12 @@ $(srcdir)/Modules/_blake2/blake2s_impl.c: $(srcdir)/Modules/_blake2/blake2b_impl
 	$(PYTHON_FOR_REGEN) $(srcdir)/Modules/_blake2/blake2b2s.py
 	$(PYTHON_FOR_REGEN) $(srcdir)/Tools/clinic/clinic.py -f $@
 
-# _scproxy.o needs to be built outside of setup.py so that we can force
-# the use of the OBJC compiler when the CC compiler is different. For
-# example, it allows _scproxy.c to be compiled using the clang compiler
-# while the rest of the project uses the GNU C compiler.
-#
-# see issue #26317 for details
-@SCPROXY@Modules/_scproxy.o:	$(srcdir)/Modules/_scproxy.c $(srcdir)/Include/Python.h
-@SCPROXY@	$(OBJC) -c $(CCSHARED) $(PY_CORE_CFLAGS) -o $@ $<
-@NOSCPROXY@.PHONY:	Modules/_scproxy.o
-
 # Build the shared modules
 # Under GNU make, MAKEFLAGS are sorted and normalized; the 's' for
 # -s, --silent or --quiet is always the first char.
 # Under BSD make, MAKEFLAGS might be " -s -v x=y".
 # Ignore macros passed by GNU make, passed after --
-sharedmods: $(BUILDPYTHON) pybuilddir.txt Modules/_math.o Modules/_scproxy.o
+sharedmods: $(BUILDPYTHON) pybuilddir.txt Modules/_math.o
 	@case "`echo X $$MAKEFLAGS | sed 's/^X //;s/ -- .*//'`" in \
 	    *\ -s*|s*) quiet="-q";; \
 	    *) quiet="";; \
diff --git a/Misc/ACKS b/Misc/ACKS
index 86b687b..6511383 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -882,7 +882,6 @@ Sam Kimbrel
 Tomohiko Kinebuchi
 James King
 W. Trevor King
-Jeffrey Kintscher
 Paul Kippes
 Steve Kirsch
 Sebastian Kirsche
diff --git a/Misc/NEWS.d/next/Build/2019-05-14-05-35-14.bpo-26317.no8mw-.rst b/Misc/NEWS.d/next/Build/2019-05-14-05-35-14.bpo-26317.no8mw-.rst
deleted file mode 100644
index 4072a4a..0000000
--- a/Misc/NEWS.d/next/Build/2019-05-14-05-35-14.bpo-26317.no8mw-.rst
+++ /dev/null
@@ -1 +0,0 @@
-The OBJC and OBJCXX standard command line options for the configure script are now supported. This allows building fot macOS with a third-party compiler, like GNU gcc, for everything except for the several system-specific source files that need system headers that require the Apple-supplied compile chain (e.g. the _scproxy helper module and PythonLauncher.app).  Patch by Jeffrey Kintscher.
diff --git a/aclocal.m4 b/aclocal.m4
index 3b865c3..b5f9cb0 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -55,7 +55,7 @@ dnl
 dnl See the "Since" comment for each macro you use to see what version
 dnl of the macros you require.
 m4_defun([PKG_PREREQ],
-[m4_define([PKG_MACROS_VERSION], [0.29.2])
+[m4_define([PKG_MACROS_VERSION], [0.29.1])
 m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
     [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
 ])dnl PKG_PREREQ
@@ -156,7 +156,7 @@ AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
 
 pkg_failed=no
-AC_MSG_CHECKING([for $2])
+AC_MSG_CHECKING([for $1])
 
 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
@@ -166,11 +166,11 @@ and $1[]_LIBS to avoid the need to call pkg-config.
 See the pkg-config man page for more details.])
 
 if test $pkg_failed = yes; then
-        AC_MSG_RESULT([no])
+   	AC_MSG_RESULT([no])
         _PKG_SHORT_ERRORS_SUPPORTED
         if test $_pkg_short_errors_supported = yes; then
 	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
-        else
+        else 
 	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
         fi
 	# Put the nasty error message in config.log where it belongs
@@ -187,7 +187,7 @@ installed software in a non-standard prefix.
 _PKG_TEXT])[]dnl
         ])
 elif test $pkg_failed = untried; then
-        AC_MSG_RESULT([no])
+     	AC_MSG_RESULT([no])
 	m4_default([$4], [AC_MSG_FAILURE(
 [The pkg-config script could not be found or is too old.  Make sure it
 is in your PATH or set the PKG_CONFIG environment variable to the full
diff --git a/configure b/configure
index 4242d5c..56d66d0 100755
--- a/configure
+++ b/configure
@@ -716,14 +716,6 @@ MULTIARCH_CPPFLAGS
 PLATFORM_TRIPLET
 MULTIARCH
 ac_ct_CXX
-NOSCPROXY
-SCPROXY
-ac_ct_OBJCXX
-OBJCXXFLAGS
-OBJCXX
-ac_ct_OBJC
-OBJCFLAGS
-OBJC
 MAINCC
 CXX
 SED
@@ -868,10 +860,6 @@ LDFLAGS
 LIBS
 CPPFLAGS
 CPP
-OBJC
-OBJCFLAGS
-OBJCXX
-OBJCXXFLAGS
 PROFILE_TASK
 PKG_CONFIG
 PKG_CONFIG_PATH
@@ -1611,10 +1599,6 @@ Some influential environment variables:
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
   CPP         C preprocessor
-  OBJC        Objective C compiler command
-  OBJCFLAGS   Objective C compiler flags
-  OBJCXX      Objective C++ compiler command
-  OBJCXXFLAGS Objective C++ compiler flags
   PROFILE_TASK
               Python args for PGO generation task
   PKG_CONFIG  path to pkg-config utility
@@ -1778,82 +1762,6 @@ fi
 
 } # ac_fn_c_try_cpp
 
-# ac_fn_objc_try_compile LINENO
-# -----------------------------
-# Try to compile conftest.$ac_ext, and return whether this succeeded.
-ac_fn_objc_try_compile ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  rm -f conftest.$ac_objext
-  if { { ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compile") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && {
-	 test -z "$ac_objc_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_objc_try_compile
-
-# ac_fn_objcxx_try_compile LINENO
-# -------------------------------
-# Try to compile conftest.$ac_ext, and return whether this succeeded.
-ac_fn_objcxx_try_compile ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  rm -f conftest.$ac_objext
-  if { { ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compile") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && {
-	 test -z "$ac_objcxx_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_objcxx_try_compile
-
 # ac_fn_c_try_link LINENO
 # -----------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded.
@@ -4733,525 +4641,6 @@ $as_echo "$ac_cv_path_SED" >&6; }
 
 
 
-
-if test "$ac_sys_system" = "Darwin"
-then
-	# MacOSX requires an Objective C compiler to
-	# build some Mac-specific code.
-	ac_ext=m
-ac_cpp='$OBJCPP $CPPFLAGS'
-ac_compile='$OBJC -c $OBJCFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$OBJC -o conftest$ac_exeext $OBJCFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_objc_compiler_gnu
-if test -n "$ac_tool_prefix"; then
-  for ac_prog in gcc objcc objc cc CC
-  do
-    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
-set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_OBJC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$OBJC"; then
-  ac_cv_prog_OBJC="$OBJC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_OBJC="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-OBJC=$ac_cv_prog_OBJC
-if test -n "$OBJC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJC" >&5
-$as_echo "$OBJC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-    test -n "$OBJC" && break
-  done
-fi
-if test -z "$OBJC"; then
-  ac_ct_OBJC=$OBJC
-  for ac_prog in gcc objcc objc cc CC
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_OBJC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_OBJC"; then
-  ac_cv_prog_ac_ct_OBJC="$ac_ct_OBJC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_OBJC="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_OBJC=$ac_cv_prog_ac_ct_OBJC
-if test -n "$ac_ct_OBJC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJC" >&5
-$as_echo "$ac_ct_OBJC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$ac_ct_OBJC" && break
-done
-
-  if test "x$ac_ct_OBJC" = x; then
-    OBJC="gcc"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    OBJC=$ac_ct_OBJC
-  fi
-fi
-
-# Provide some information about the compiler.
-$as_echo "$as_me:${as_lineno-$LINENO}: checking for Objective C compiler version" >&5
-set X $ac_compile
-ac_compiler=$2
-for ac_option in --version -v -V -qversion; do
-  { { ac_try="$ac_compiler $ac_option >&5"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    sed '10a\
-... rest of stderr output deleted ...
-         10q' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-  fi
-  rm -f conftest.er1 conftest.err
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }
-done
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU Objective C compiler" >&5
-$as_echo_n "checking whether we are using the GNU Objective C compiler... " >&6; }
-if ${ac_cv_objc_compiler_gnu+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-#ifndef __GNUC__
-       choke me
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objc_try_compile "$LINENO"; then :
-  ac_compiler_gnu=yes
-else
-  ac_compiler_gnu=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-ac_cv_objc_compiler_gnu=$ac_compiler_gnu
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objc_compiler_gnu" >&5
-$as_echo "$ac_cv_objc_compiler_gnu" >&6; }
-if test $ac_compiler_gnu = yes; then
-  GOBJC=yes
-else
-  GOBJC=
-fi
-ac_test_OBJCFLAGS=${OBJCFLAGS+set}
-ac_save_OBJCFLAGS=$OBJCFLAGS
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $OBJC accepts -g" >&5
-$as_echo_n "checking whether $OBJC accepts -g... " >&6; }
-if ${ac_cv_prog_objc_g+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_save_objc_werror_flag=$ac_objc_werror_flag
-   ac_objc_werror_flag=yes
-   ac_cv_prog_objc_g=no
-   OBJCFLAGS="-g"
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objc_try_compile "$LINENO"; then :
-  ac_cv_prog_objc_g=yes
-else
-  OBJCFLAGS=""
-      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objc_try_compile "$LINENO"; then :
-
-else
-  ac_objc_werror_flag=$ac_save_objc_werror_flag
-	 OBJCFLAGS="-g"
-	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objc_try_compile "$LINENO"; then :
-  ac_cv_prog_objc_g=yes
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-   ac_objc_werror_flag=$ac_save_objc_werror_flag
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_objc_g" >&5
-$as_echo "$ac_cv_prog_objc_g" >&6; }
-if test "$ac_test_OBJCFLAGS" = set; then
-  OBJCFLAGS=$ac_save_OBJCFLAGS
-elif test $ac_cv_prog_objc_g = yes; then
-  if test "$GOBJC" = yes; then
-    OBJCFLAGS="-g -O2"
-  else
-    OBJCFLAGS="-g"
-  fi
-else
-  if test "$GOBJC" = yes; then
-    OBJCFLAGS="-O2"
-  else
-    OBJCFLAGS=
-  fi
-fi
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-	ac_ext=mm
-ac_cpp='$OBJCXXCPP $CPPFLAGS'
-ac_compile='$OBJCXX -c $OBJCXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$OBJCXX -o conftest$ac_exeext $OBJCXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_objcxx_compiler_gnu
-if test -n "$ac_tool_prefix"; then
-  for ac_prog in g++ objc++ objcxx c++ CXX
-  do
-    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
-set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_OBJCXX+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$OBJCXX"; then
-  ac_cv_prog_OBJCXX="$OBJCXX" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_OBJCXX="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-OBJCXX=$ac_cv_prog_OBJCXX
-if test -n "$OBJCXX"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $OBJCXX" >&5
-$as_echo "$OBJCXX" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-    test -n "$OBJCXX" && break
-  done
-fi
-if test -z "$OBJCXX"; then
-  ac_ct_OBJCXX=$OBJCXX
-  for ac_prog in g++ objc++ objcxx c++ CXX
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_OBJCXX+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_OBJCXX"; then
-  ac_cv_prog_ac_ct_OBJCXX="$ac_ct_OBJCXX" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_OBJCXX="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_OBJCXX=$ac_cv_prog_ac_ct_OBJCXX
-if test -n "$ac_ct_OBJCXX"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_OBJCXX" >&5
-$as_echo "$ac_ct_OBJCXX" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$ac_ct_OBJCXX" && break
-done
-
-  if test "x$ac_ct_OBJCXX" = x; then
-    OBJCXX="g++"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    OBJCXX=$ac_ct_OBJCXX
-  fi
-fi
-
-# Provide some information about the compiler.
-$as_echo "$as_me:${as_lineno-$LINENO}: checking for Objective C++ compiler version" >&5
-set X $ac_compile
-ac_compiler=$2
-for ac_option in --version -v -V -qversion; do
-  { { ac_try="$ac_compiler $ac_option >&5"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    sed '10a\
-... rest of stderr output deleted ...
-         10q' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-  fi
-  rm -f conftest.er1 conftest.err
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }
-done
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU Objective C++ compiler" >&5
-$as_echo_n "checking whether we are using the GNU Objective C++ compiler... " >&6; }
-if ${ac_cv_objcxx_compiler_gnu+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-#ifndef __GNUC__
-       choke me
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objcxx_try_compile "$LINENO"; then :
-  ac_compiler_gnu=yes
-else
-  ac_compiler_gnu=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-ac_cv_objcxx_compiler_gnu=$ac_compiler_gnu
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objcxx_compiler_gnu" >&5
-$as_echo "$ac_cv_objcxx_compiler_gnu" >&6; }
-if test $ac_compiler_gnu = yes; then
-  GOBJCXX=yes
-else
-  GOBJCXX=
-fi
-ac_test_OBJCXXFLAGS=${OBJCXXFLAGS+set}
-ac_save_OBJCXXFLAGS=$OBJCXXFLAGS
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $OBJCXX accepts -g" >&5
-$as_echo_n "checking whether $OBJCXX accepts -g... " >&6; }
-if ${ac_cv_prog_objcxx_g+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_save_objcxx_werror_flag=$ac_objcxx_werror_flag
-   ac_objcxx_werror_flag=yes
-   ac_cv_prog_objcxx_g=no
-   OBJCXXFLAGS="-g"
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objcxx_try_compile "$LINENO"; then :
-  ac_cv_prog_objcxx_g=yes
-else
-  OBJCXXFLAGS=""
-      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objcxx_try_compile "$LINENO"; then :
-
-else
-  ac_objcxx_werror_flag=$ac_save_objcxx_werror_flag
-	 OBJCXXFLAGS="-g"
-	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_objcxx_try_compile "$LINENO"; then :
-  ac_cv_prog_objcxx_g=yes
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-   ac_objcxx_werror_flag=$ac_save_objcx_werror_flag
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_objcxx_g" >&5
-$as_echo "$ac_cv_prog_objcxx_g" >&6; }
-if test "$ac_test_OBJCXXFLAGS" = set; then
-  OBJCXXFLAGS=$ac_save_OBJCXXFLAGS
-elif test $ac_cv_prog_objcxx_g = yes; then
-  if test "$GOBJCXX" = yes; then
-    OBJCXXFLAGS="-g -O2"
-  else
-    OBJCXXFLAGS="-g"
-  fi
-else
-  if test "$GOBJCXX" = yes; then
-    OBJCXXFLAGS="-O2"
-  else
-    OBJCXXFLAGS=
-  fi
-fi
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-
-
-	SCPROXY=
-	NOSCPROXY=#
-else
-	SCPROXY=#
-	NOSCPROXY=
-fi
-
-
-
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-cxx-main=<compiler>" >&5
 $as_echo_n "checking for --with-cxx-main=<compiler>... " >&6; }
 
diff --git a/configure.ac b/configure.ac
index d269c85..497d7c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -663,25 +663,6 @@ AC_PROG_SED
 
 AC_SUBST(CXX)
 AC_SUBST(MAINCC)
-
-if test "$ac_sys_system" = "Darwin"
-then
-	# MacOSX requires an Objective C compiler to
-	# build some Mac-specific code.
-	AC_PROG_OBJC
-	AC_PROG_OBJCXX
-	AC_SUBST(OBJC)
-	AC_SUBST(OBJCXX)
-	SCPROXY=
-	NOSCPROXY=#
-else
-	SCPROXY=#
-	NOSCPROXY=
-fi
-
-AC_SUBST(SCPROXY)
-AC_SUBST(NOSCPROXY)
-
 AC_MSG_CHECKING(for --with-cxx-main=<compiler>)
 AC_ARG_WITH(cxx_main,
             AS_HELP_STRING([--with-cxx-main@<:@=COMPILER@:>@],
diff --git a/setup.py b/setup.py
index 9b2cc7a..a220f366 100644
--- a/setup.py
+++ b/setup.py
@@ -1583,11 +1583,10 @@ class PyBuildExt(build_ext):
             self.missing.append('ossaudiodev')
 
         if MACOS:
-            self.add(Extension('_scproxy', [],
+            self.add(Extension('_scproxy', ['_scproxy.c'],
                                extra_link_args=[
                                    '-framework', 'SystemConfiguration',
-                                   '-framework', 'CoreFoundation'],
-                               extra_objects=['Modules/_scproxy.o']))
+                                   '-framework', 'CoreFoundation']))
 
     def detect_compress_exts(self):
         # Andrew Kuchling's zlib module.  Note that some versions of zlib