* README: --gc-sections and map files are now supported. Document

	some build requirements.

diff --git a/gold/ChangeLog b/gold/ChangeLog
index de4597ec872bc10d593ff99717e61b767f0cbf0d..cac34053e24965cd32fb364aa3b01d519c2c3406 100644 (file)
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,5 +1,8 @@
 2009-02-28  Ian Lance Taylor  <iant@google.com>
 
+       * README: --gc-sections and map files are now supported.  Document
+       some build requirements.
+
        PR 6992
        * symtab.cc (Symbol_table::sized_write_section_symbol): In a
        relocatable link set the value of the section symbol to zero.

diff --git a/gold/README b/gold/README
index 49de60ad872cd689ba7bb1e77e3dffe97030ea33..8891d624d65bbedb26e6c084c3c996504d66b650 100644 (file)
--- a/gold/README
+++ b/gold/README
@@ -17,9 +17,7 @@ omissions--features of the GNU linker not currently supported in
 gold--are:
   * MEMORY regions in linker scripts
   * MRI compatible linker scripts
-  * linker map files (-M, -Map)
   * cross-reference reports (--cref)
-  * linker garbage collection (--gc-sections)
   * position independent executables (-pie)
   * various other minor options
 
@@ -51,3 +49,16 @@ of work.  Task objects are stored on a single Workqueue object.  Tasks
 communicate via Task_token objects.  Task_token objects are only
 manipulated while holding the master Workqueue lock.  Relatively few
 mutexes are used.
+
+
+Build requirements
+==================
+
+The gold source code uses templates heavily.  Building it requires a
+recent version of g++.  g++ 4.0.3 is known to work.  g++ 3.2 and g++
+3.4.3 are known to fail.
+
+The linker script parser uses features which are only in newer
+versions of bison.  bison 2.3 is known to work.  bison 1.26 is known
+to fail.  If you are building gold from an official binutils release,
+the bison output should already be included.