trace tag CC

[Alexandre Duret-Lutz]

The CC tags is preselected by libtool and _LT_LANG is not called
for it.  Therefore tracing LT_SUPPORTED_TAG does not report it,
and Automake does not use it.  This confused me when I wrote the
"Tags" node, as I though there were no CC tag at all.  

This patch corrects both the manual and the trace output,
although I was not sure where to add the LT_SUPPORTED_TAG([CC])
call.


2004-07-28  Alexandre Duret-Lutz  <address@hidden>

        * doc/libtool.texi (Tags): Document CC.
        * m4/libtool.m4 (_LT_SETUP): Register CC as supported tag so that
        Automake uses it.

Index: doc/libtool.texi
===================================================================
RCS file: /cvsroot/libtool/libtool/doc/libtool.texi,v
retrieving revision 1.165
diff -u -r1.165 libtool.texi
--- doc/libtool.texi    15 Jul 2004 12:37:13 -0000      1.165
+++ doc/libtool.texi    28 Jul 2004 19:43:59 -0000
@@ -2243,7 +2243,7 @@
 
 @multitable {Windows Resource} {Tag name}
 @item Language name    @tab Tag name
address@hidden C                @tab
address@hidden C                @tab CC
 @item C++              @tab CXX
 @item Java             @tab GCJ
 @item Fortran 77       @tab F77
@@ -2258,8 +2258,8 @@
 @address@hidden option (@pxref{Invoking libtool}).  It is a good
 idea to do so in @file{Makefile} rules, because that will allow users to
 substitute the compiler without relying on @command{libtool} inference
-heuristics.  Note that there is no tag for @code{C} because that is
-the default configuration.
+heuristics.  When no tag is specified, @command{libtool} will default
+to @code{CC}; this tag always exists.
 
 Finally, the set of tags available in a particular project can be
 retrieved by tracing for the @code{LT_SUPPORTED_TAG} macro (@pxref{Trace
Index: m4/libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/m4/libtool.m4,v
retrieving revision 1.81
diff -u -r1.81 libtool.m4
--- m4/libtool.m4       28 Jul 2004 14:57:28 -0000      1.81
+++ m4/libtool.m4       28 Jul 2004 19:44:01 -0000
@@ -191,6 +191,7 @@
 test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
 
 # Use C for the default configuration in the libtool script
+LT_SUPPORTED_TAG([CC])
 _LT_LANG_C_CONFIG
 _LT_LANG_DEFAULT_CONFIG
 _LT_CONFIG_COMMANDS

-- 
Alexandre Duret-Lutz