From da612d62260220618af9be428aa827d5d04f344f Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 1 Jun 2010 14:56:56 +0000
Subject: -retain-symbols-file is not what it seems. Update the makefiles and
 configury to use --version-script.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105271 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/configure.ac       |  4 ++--
 autoconf/m4/link_options.m4 | 23 +++++++++++++----------
 2 files changed, 15 insertions(+), 12 deletions(-)

(limited to 'autoconf')

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 8487d9403c..66f5383091 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1039,8 +1039,8 @@ AC_LINK_USE_R
 dnl Determine whether the linker supports the -export-dynamic option.
 AC_LINK_EXPORT_DYNAMIC
 
-dnl Determine whether the linker supports the -retain-symbols-file option.
-AC_LINK_RETAIN_SYMBOLS_FILE
+dnl Determine whether the linker supports the --version-script option.
+AC_LINK_VERSION_SCRIPT
 
 dnl Check for libtool and the library that has dlopen function (which must come
 dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with
diff --git a/autoconf/m4/link_options.m4 b/autoconf/m4/link_options.m4
index 697abab07d..251c8a4f50 100644
--- a/autoconf/m4/link_options.m4
+++ b/autoconf/m4/link_options.m4
@@ -40,14 +40,14 @@ if test "$llvm_cv_link_use_export_dynamic" = yes ; then
 ])
 
 #
-# Determine if the system can handle the -retain-symbols-file option being
+# Determine if the system can handle the --version-script option being
 # passed to the linker.
 #
 # This macro is specific to LLVM.
 #
-AC_DEFUN([AC_LINK_RETAIN_SYMBOLS_FILE],
-[AC_CACHE_CHECK([for compiler -Wl,-retain-symbols-file option],
-                [llvm_cv_link_use_retain_symbols_file],
+AC_DEFUN([AC_LINK_VERSION_SCRIPT],
+[AC_CACHE_CHECK([for compiler -Wl,--version-script option],
+                [llvm_cv_link_use_version_script],
 [ AC_LANG_PUSH([C])
   oldcflags="$CFLAGS"
 
@@ -67,18 +67,21 @@ AC_DEFUN([AC_LINK_RETAIN_SYMBOLS_FILE],
     (umask 077 && mkdir "$tmp")
   } || exit $?
 
-  echo "main" > "$tmp/exports"
+  echo "{" > "$tmp/export.map"
+  echo "  global: main;" >> "$tmp/export.map"
+  echo "  local: *;" >> "$tmp/export.map"
+  echo "};" >> "$tmp/export.map"
 
-  CFLAGS="$CFLAGS -Wl,-retain-symbols-file=$tmp/exports"
+  CFLAGS="$CFLAGS -Wl,--version-script=$tmp/export.map"
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[]])],
-    [llvm_cv_link_use_retain_symbols_file=yes],[llvm_cv_link_use_retain_symbols_file=no])
-  rm "$tmp/exports"
+    [llvm_cv_link_use_version_script=yes],[llvm_cv_link_version_script=no])
+  rm "$tmp/export.map"
   rmdir "$tmp"
   CFLAGS="$oldcflags"
   AC_LANG_POP([C])
 ])
-if test "$llvm_cv_link_use_retain_symbols_file" = yes ; then
-  AC_SUBST(HAVE_LINK_RETAIN_SYMBOLS_FILE,1)
+if test "$llvm_cv_link_use_version_script" = yes ; then
+  AC_SUBST(HAVE_LINK_VERSION_SCRIPT,1)
   fi
 ])
 
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