From 3d4f035971accd19235c75811291ce1f150798de Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Mon, 28 Mar 2011 11:44:25 +0000
Subject: set default MODULE_SCOPE=extern, in case no other value is determined

---
 unix/configure | 25 +++++++++++++++++++++----
 unix/tcl.m4    |  9 ++++++++-
 win/configure  |  5 +++++
 win/tcl.m4     |  1 +
 4 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/unix/configure b/unix/configure
index 7d41649..e44463a 100755
--- a/unix/configure
+++ b/unix/configure
@@ -4380,13 +4380,13 @@ echo "${ECHO_T}$tcl_cv_cc_visibility_hidden" >&6
 
 	CFLAGS="$CFLAGS -fvisibility=hidden"
 
-else
-
-
 cat >>confdefs.h <<\_ACEOF
-#define NO_VIZ
+#define MODULE_SCOPE extern
 _ACEOF
 
+
+else
+
 	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
 	cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
@@ -6001,6 +6001,7 @@ cat >>confdefs.h <<\_ACEOF
 #define MODULE_SCOPE __private_extern__
 _ACEOF
 
+		tcl_cv_cc_visibility_hidden=yes
 
 fi
 
@@ -6873,6 +6874,22 @@ fi
 fi
 
 
+    if test "$tcl_cv_cc_visibility_hidden" != yes; then
+
+
+cat >>confdefs.h <<\_ACEOF
+#define MODULE_SCOPE extern
+_ACEOF
+
+
+cat >>confdefs.h <<\_ACEOF
+#define NO_VIZ
+_ACEOF
+
+
+fi
+
+
     if test "$SHARED_LIB_SUFFIX" = ""; then
 
 	SHARED_LIB_SUFFIX='${VERSION}${SHLIB_SUFFIX}'
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 9e533f0..8c9eaf0 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -1055,8 +1055,8 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
     ])
     AS_IF([test $tcl_cv_cc_visibility_hidden = yes], [
 	CFLAGS="$CFLAGS -fvisibility=hidden"
+	AC_DEFINE(MODULE_SCOPE, [extern], [No need to mark inidividual symbols as hidden])
     ], [
-	AC_DEFINE(NO_VIZ, [], [No visibility attribute])
 	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
 	AC_TRY_LINK([
 	    extern __attribute__((__visibility__("hidden"))) void f(void);
@@ -1663,6 +1663,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 	    AS_IF([test "$tcl_cv_cc_visibility_hidden" != yes], [
 		AC_DEFINE(MODULE_SCOPE, [__private_extern__],
 		    [Compiler support for module scope symbols])
+		tcl_cv_cc_visibility_hidden=yes
 	    ])
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
@@ -2061,6 +2062,12 @@ dnl # preprocessing tests use only CPPFLAGS.
 	    *) SHLIB_CFLAGS="-fPIC" ;;
 	esac])
 
+    AS_IF([test "$tcl_cv_cc_visibility_hidden" != yes], [
+	AC_DEFINE(MODULE_SCOPE, [extern],
+	    [No Compiler support for module scope symbols])
+	AC_DEFINE(NO_VIZ, [], [No visibility attribute])
+    ])
+
     AS_IF([test "$SHARED_LIB_SUFFIX" = ""], [
 	SHARED_LIB_SUFFIX='${VERSION}${SHLIB_SUFFIX}'])
     AS_IF([test "$UNSHARED_LIB_SUFFIX" = ""], [
diff --git a/win/configure b/win/configure
index 271bc3a..8bc626f 100755
--- a/win/configure
+++ b/win/configure
@@ -3239,6 +3239,11 @@ echo "${ECHO_T}$CELIB_DIR" >&6
     # Set some defaults (may get changed below)
     EXTRA_CFLAGS=""
 
+cat >>confdefs.h <<\_ACEOF
+#define MODULE_SCOPE extern
+_ACEOF
+
+
     # Extract the first word of "cygpath", so it can be a program name with args.
 set dummy cygpath; ac_word=$2
 echo "$as_me:$LINENO: checking for $ac_word" >&5
diff --git a/win/tcl.m4 b/win/tcl.m4
index 51498d6..5b72e1b 100644
--- a/win/tcl.m4
+++ b/win/tcl.m4
@@ -402,6 +402,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 
     # Set some defaults (may get changed below)
     EXTRA_CFLAGS=""
+    AC_DEFINE(MODULE_SCOPE, [extern], [No need to mark inidividual symbols as hidden])
 
     AC_CHECK_PROG(CYGPATH, cygpath, cygpath -w, echo)
 
-- 
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