diff --git a/binutils/bfd/config.bfd b/binutils/bfd/config.bfd
index c3a7564154..fd98801568 100644
--- a/binutils/bfd/config.bfd
+++ b/binutils/bfd/config.bfd
@@ -1280,6 +1280,7 @@ case "${targ}" in
     targ_archs="$targ_archs bfd_i386_arch"
     ;;
   powerpc-*-macos*)
+    targ_cflags=-DAIX_WEAK_SUPPORT
     targ_selvecs=powerpc_xcoff_vec
     targ_defvec=powerpc_xcoff_vec
     ;;
diff --git a/binutils/binutils/configure b/binutils/binutils/configure
index 302cbd16d0..1611f7ff72 100755
--- a/binutils/binutils/configure
+++ b/binutils/binutils/configure
@@ -14466,7 +14466,8 @@ do
 	  ;;
 	powerpc*-aix5.[01])
 	  ;;
-	powerpc*-aix[5-9].*)
+	powerpc*-aix[5-9].* \
+	| powerpc-*-macos)
 	  OBJDUMP_DEFS="-DAIX_WEAK_SUPPORT"
 	  ;;
 	powerpc*-*-pe* | powerpc*-*-cygwin*)
diff --git a/binutils/binutils/configure.ac b/binutils/binutils/configure.ac
index e9813c5e1d..a3876d2047 100644
--- a/binutils/binutils/configure.ac
+++ b/binutils/binutils/configure.ac
@@ -351,8 +351,9 @@ changequote(,)dnl
 changequote([,])dnl
 	  ;;
 changequote(,)dnl
-	powerpc*-aix[5-9].*)
+	powerpc*-aix[5-9].* \
 changequote([,])dnl
+	| powerpc-*-macos)
 	  OBJDUMP_DEFS="-DAIX_WEAK_SUPPORT"
 	  ;;
 	powerpc*-*-pe* | powerpc*-*-cygwin*)
diff --git a/binutils/gas/configure b/binutils/gas/configure
index 6b619e020c..8267cba942 100755
--- a/binutils/gas/configure
+++ b/binutils/gas/configure
@@ -12075,7 +12075,8 @@ $as_echo "$as_me: WARNING: GAS support for ${generic_target} is preliminary and
       microblaze*)
         ;;
 
-      ppc-*-aix[5-9].*)
+      ppc-*-aix[5-9].* \
+      | ppc-*-macos*)
 
 $as_echo "#define AIX_WEAK_SUPPORT 1" >>confdefs.h
 
diff --git a/binutils/gas/configure.ac b/binutils/gas/configure.ac
index 371f7b387f..68d1b8e02b 100644
--- a/binutils/gas/configure.ac
+++ b/binutils/gas/configure.ac
@@ -163,8 +163,9 @@ for this_target in $target $canon_targets ; do
         ;;
 
 changequote(,)dnl
-      ppc-*-aix[5-9].*)
+      ppc-*-aix[5-9].* \
 changequote([,])dnl
+      | ppc-*-macos*)
 	AC_DEFINE(AIX_WEAK_SUPPORT, 1,
 		  [Define if using AIX 5.2 value for C_WEAKEXT.])
 	;;