Configure zlib with --enable-host-shared for shared bfd

When bfd is configured as a shared library, we need to configure zlib
with --enable-host-shared since zlib is used by bfd.

	PR ld/18355
	* Makefile.def: Add extra_configure_flags to host zlib.
	* configure.ac (extra_host_zlib_configure_flags): New.  Set
	to --enable-host-shared When bfd is to be built as shared
	library.  AC_SUBST.
	* Makefile.in: Regenerated.
	* configure: Likewise.

1 files changed, 10 insertions, 0 deletions

diff --git a/configure b/configure
index 97250fa..426eece 100755
--- a/configure
+++ b/configure
@@ -643,6 +643,7 @@ CXXFLAGS_FOR_TARGET
 CFLAGS_FOR_TARGET
 DEBUG_PREFIX_CFLAGS_FOR_TARGET
 SYSROOT_CFLAGS_FOR_TARGET
+extra_host_zlib_configure_flags
 extra_host_libiberty_configure_flags
 stage1_languages
 extra_linker_plugin_flags
@@ -6585,15 +6586,24 @@ fi
 
 # Sometimes we have special requirements for the host libiberty.
 extra_host_libiberty_configure_flags=
+extra_host_zlib_configure_flags=
 case " $configdirs " in
   *" lto-plugin "* | *" libcc1 "*)
     # When these are to be built as shared libraries, the same applies to
     # libiberty.
     extra_host_libiberty_configure_flags=--enable-shared
     ;;
+  *" bfd "*)
+    # When bfd is to be built as a shared library, the same applies to
+    # zlib.
+    if test "$enable_shared" = "yes"; then
+      extra_host_zlib_configure_flags=--enable-host-shared
+    fi
+    ;;
 esac
 
 
+
 # Produce a warning message for the subdirs we can't configure.
 # This isn't especially interesting in the Cygnus tree, but in the individual
 # FSF releases, it's important to let people know when their machine isn't