Support for response files with $NM.

* libltdl/m4/libtool.m4 (_LT_CMD_GLOBAL_SYMBOLS)
<nm_file_list_spec>: New tag variable. Set it to '@' if input
files can be passed to $NM in a file named with the '@' option.
* libltdl/config/ltmain.m4sh (func_mode_link): When
nm_file_list_spec is nonempty, use it to avoid skipped_export.
* doc/libtool.texi (libtool script contents): Document
new variable.

4 files changed, 43 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index f9bb7dc6..6c5f3ca0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2010-07-01  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+	    Peter Rosin  <peda@lysator.liu.se>
+
+	Support for response files with $NM.
+	* libltdl/m4/libtool.m4 (_LT_CMD_GLOBAL_SYMBOLS)
+	<nm_file_list_spec>: New tag variable. Set it to '@' if input
+	files can be passed to $NM in a file named with the '@' option.
+	* libltdl/config/ltmain.m4sh (func_mode_link): When
+	nm_file_list_spec is nonempty, use it to avoid skipped_export.
+	* doc/libtool.texi (libtool script contents): Document
+	new variable.
+
 2010-07-04  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
 	Fix ccache test for MSVC.
diff --git a/doc/libtool.texi b/doc/libtool.texi
index af6e13d3..914bd1d8 100644
--- a/doc/libtool.texi
+++ b/doc/libtool.texi
@@ -6171,6 +6171,10 @@ Whether files must be locked to prevent conflicts when compiling
 simultaneously.  Set to @samp{yes} or @samp{no}.
 @end defvar
 
+@defvar nm_file_list_spec
+Specify filename containing input files for @code{NM}.
+@end defvar
+
 @defvar no_builtin_flag
 Compiler flag to disable builtin functions that conflict with declaring
 external global symbols as @code{char}.
diff --git a/libltdl/config/ltmain.m4sh b/libltdl/config/ltmain.m4sh
index d2676f97..8cb82857 100644
--- a/libltdl/config/ltmain.m4sh
+++ b/libltdl/config/ltmain.m4sh
@@ -6719,14 +6719,30 @@ EOF
 	    $opt_dry_run || $RM $export_symbols
 	    cmds=$export_symbols_cmds
 	    save_ifs="$IFS"; IFS='~'
-	    for cmd in $cmds; do
+	    for cmd1 in $cmds; do
 	      IFS="$save_ifs"
-	      eval cmd=\"$cmd\"
+	      eval cmd=\"$cmd1\"
 	      func_len " $cmd"
 	      len=$func_len_result
 	      if test "$len" -lt "$max_cmd_len" || test "$max_cmd_len" -le -1; then
 		func_show_eval "$cmd" 'exit $?'
 		skipped_export=false
+	      elif test -n "$nm_file_list_spec"; then
+		output_la=`$ECHO "X$output" | $Xsed -e "$basename"`
+		save_libobjs=$libobjs
+		save_output=$output
+		output=${output_objdir}/${output_la}.nm
+		libobjs=$nm_file_list_spec$output
+		func_append delfiles " $output"
+		func_verbose "creating $NM input file list: $output"
+		for obj in $save_libobjs; do
+		  $ECHO "$obj"
+		done > "$output"
+		eval cmd=\"$cmd1\"
+		func_show_eval "$cmd" 'exit $?'
+		output=$save_output
+		libobjs=$save_libobjs
+		skipped_export=false
 	      else
 		# The command line is too long to execute in one step.
 		func_verbose "using reloadable object file for export list..."
diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 8475d4bc..bb6957ea 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -3615,6 +3615,13 @@ else
   AC_MSG_RESULT(ok)
 fi
 
+# Response file support.
+if test "$lt_cv_nm_interface" = "MS dumpbin"; then
+  nm_file_list_spec='@'
+elif $NM --help 2>/dev/null | grep '[[@]]FILE' >/dev/null; then
+  nm_file_list_spec='@'
+fi
+
 _LT_DECL([global_symbol_pipe], [lt_cv_sys_global_symbol_pipe], [1],
     [Take the output of nm and produce a listing of raw symbols and C names])
 _LT_DECL([global_symbol_to_cdecl], [lt_cv_sys_global_symbol_to_cdecl], [1],
@@ -3625,6 +3632,8 @@ _LT_DECL([global_symbol_to_c_name_address],
 _LT_DECL([global_symbol_to_c_name_address_lib_prefix],
     [lt_cv_sys_global_symbol_to_c_name_address_lib_prefix], [1],
     [Transform the output of nm in a C name address pair when lib prefix is needed])
+_LT_DECL([], [nm_file_list_spec], [1],
+    [Specify filename containing input files for $NM])
 ]) # _LT_CMD_GLOBAL_SYMBOLS