[PATCH 1/2] Add support for --with-gdb-libdir (default: <prefix>/lib/gdb)

[Joel Brobecker <brobecker@adacore.com>]

This patch is adding a gdb_libdir path where we can store/install
gdb-specific library/object-code files... The default is lib/gdb.

2010-05-20  Joel Brobecker  <brobecker@adacore.com>

        * configure.ac: Add --with-gdb-libdir command-line option.
        * configure, config.in: Regenerate.
        * defs.h (gdb_libdir): Add declaration.
        * main.c (gdb_libdir): New global.
        (captured_main): Compute gdb_libdir.

Tested on x86_64-linux. No regression.

---
 gdb/config.in    |    7 +++++++
 gdb/configure    |   51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 gdb/configure.ac |    6 ++++++
 gdb/defs.h       |    3 +++
 gdb/main.c       |    6 ++++++
 5 files changed, 73 insertions(+), 0 deletions(-)

diff --git a/gdb/config.in b/gdb/config.in
index 5414b08..da098da 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -65,6 +65,13 @@
 /* Host long double floatformat */
 #undef GDB_HOST_LONG_DOUBLE_FORMAT
 
+/* look for global separate lib files in this path [LIBDIR/gdb] */
+#undef GDB_LIBDIR
+
+/* Define if the gdb-libdir directory should be relocated when GDB is moved.
+   */
+#undef GDB_LIBDIR_RELOCATABLE
+
 /* nativefile */
 #undef GDB_NM_FILE
 
diff --git a/gdb/configure b/gdb/configure
index 301394f..4432af1 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -676,6 +676,7 @@ REPORT_BUGS_TO
 PKGVERSION
 TARGET_OBS
 subdirs
+GDB_LIBDIR
 GDB_DATADIR
 DEBUGDIR
 am__fastdepCC_FALSE
@@ -884,6 +885,7 @@ enable_largefile
 enable_dependency_tracking
 with_separate_debug_dir
 with_gdb_datadir
+with_gdb_libdir
 with_relocated_sources
 enable_targets
 enable_64_bit_bfd
@@ -1584,6 +1586,8 @@ Optional Packages:
                           [LIBDIR/debug]
   --with-gdb-datadir=PATH look for global separate data files in this path
                           [DATADIR/gdb]
+  --with-gdb-libdir=PATH  look for global separate lib files in this path
+                          [LIBDIR/gdb]
   --with-relocated-sources=PATH
                           automatically relocate this path for source files
   --with-libunwind        use libunwind frame unwinding support
@@ -6847,6 +6851,53 @@ _ACEOF
 
 
 
+# GDB's libdir relocation
+
+
+
+# Check whether --with-gdb-libdir was given.
+if test "${with_gdb_libdir+set}" = set; then :
+  withval=$with_gdb_libdir;
+    GDB_LIBDIR=$withval
+else
+  GDB_LIBDIR=${libdir}/gdb
+fi
+
+
+  test "x$prefix" = xNONE && prefix="$ac_default_prefix"
+  test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+  ac_define_dir=`eval echo $GDB_LIBDIR`
+  ac_define_dir=`eval echo $ac_define_dir`
+
+cat >>confdefs.h <<_ACEOF
+#define GDB_LIBDIR "$ac_define_dir"
+_ACEOF
+
+
+
+  if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
+     if test "x$prefix" = xNONE; then
+     	test_prefix=/usr/local
+     else
+	test_prefix=$prefix
+     fi
+  else
+     test_prefix=$exec_prefix
+  fi
+  value=0
+  case ${ac_define_dir} in
+     "${test_prefix}"|"${test_prefix}/"*|\
+	'${exec_prefix}'|'${exec_prefix}/'*)
+     value=1
+     ;;
+  esac
+
+cat >>confdefs.h <<_ACEOF
+#define GDB_LIBDIR_RELOCATABLE $value
+_ACEOF
+
+
+
 
 # Check whether --with-relocated-sources was given.
 if test "${with_relocated_sources+set}" = set; then :
diff --git a/gdb/configure.ac b/gdb/configure.ac
index 4704a53..78eedde 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -101,6 +101,12 @@ GDB_AC_WITH_DIR(GDB_DATADIR, gdb-datadir,
     [look for global separate data files in this path @<:@DATADIR/gdb@:>@],
     [${datadir}/gdb])
 
+# GDB's libdir relocation
+
+GDB_AC_WITH_DIR(GDB_LIBDIR, gdb-libdir,
+    [look for global separate lib files in this path @<:@LIBDIR/gdb@:>@],
+    [${libdir}/gdb])
+
 AC_ARG_WITH(relocated-sources,
 AS_HELP_STRING([--with-relocated-sources=PATH], [automatically relocate this path for source files]),
 [reloc_srcdir="${withval}"
diff --git a/gdb/defs.h b/gdb/defs.h
index b18e03f..61fe7a3 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -157,6 +157,9 @@ extern char *gdb_sysroot;
 /* GDB datadir, used to store data files.  */
 extern char *gdb_datadir;
 
+/* GDB libdir, used to store lib files.  */
+extern char *gdb_libdir;
+
 /* Search path for separate debug files.  */
 extern char *debug_file_directory;
 
diff --git a/gdb/main.c b/gdb/main.c
index 254e74d..fab9012 100644
--- a/gdb/main.c
+++ b/gdb/main.c
@@ -68,6 +68,9 @@ char *gdb_sysroot = 0;
 /* GDB datadir, used to store data files.  */
 char *gdb_datadir = 0;
 
+/* GDB libdir, used to store lib files.  */
+char *gdb_libdir = 0;
+
 struct ui_file *gdb_stdout;
 struct ui_file *gdb_stderr;
 struct ui_file *gdb_stdlog;
@@ -351,6 +354,9 @@ captured_main (void *data)
   gdb_datadir = relocate_directory (argv[0], GDB_DATADIR,
 				    GDB_DATADIR_RELOCATABLE);
 
+  gdb_libdir = relocate_directory (argv[0], GDB_LIBDIR,
+				   GDB_LIBDIR_RELOCATABLE);
+
 #ifdef RELOC_SRCDIR
   add_substitute_path_rule (RELOC_SRCDIR,
 			    make_relative_prefix (argv[0], BINDIR,
-- 
1.7.1