Index: gdb/testsuite/gdb.base/prologue-gccbug49906.exp
===================================================================
RCS file: gdb/testsuite/gdb.base/prologue-gccbug49906.exp
diff -N gdb/testsuite/gdb.base/prologue-gccbug49906.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ gdb/testsuite/gdb.base/prologue-gccbug49906.exp	25 Oct 2011 17:29:12 -0000
@@ -0,0 +1,45 @@
+# Test for prologue skipping in minimal symbols with line info when
+# compiled with -O0.  Test workaround gcc bug 49906.
+# Copyright 2011 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set testfile "prologue"
+set srcfile ${testfile}.c
+set binfile ${objdir}/${subdir}/${testfile}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug optimize=-O0}] != "" } {
+     untested prologue.exp
+     return -1
+}
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+if ![runto_main] then {
+   fail "Can't run to main"
+   return 0
+}
+
+set loc_end_of_prologue_workaround [gdb_get_line_number "end of prologue workaround"]
+set loc_end_of_prologue_broken [gdb_get_line_number "end of prologue broken"]
+
+# Test less human-confusing breakpoint location in case weirdness is
+# encountered.
+gdb_test "break f_gccbug49906"\
+	"Breakpoint.*at.*file.*$srcfile,.*line.*$loc_end_of_prologue_workaround\\."\
+	"Workaround gcc bug 49906 worked"
+
Index: gdb/testsuite/gdb.base/prologue.c
===================================================================
RCS file: /cvs/src/src/gdb/testsuite/gdb.base/prologue.c,v
retrieving revision 1.6
diff -u -p -r1.6 prologue.c
--- gdb/testsuite/gdb.base/prologue.c	1 Jan 2011 15:33:42 -0000	1.6
+++ gdb/testsuite/gdb.base/prologue.c	25 Oct 2011 17:29:12 -0000
@@ -16,6 +16,15 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    */
 
+
+static int i;
+static void
+f_gccbug49906 (void)
+{  for (;;) /* end of prologue workaround  - Weird style intended! */
+     if (i++)
+       break;
+} /* end of prologue broken */
+
 int leaf (void)
 {
   return 1;
@@ -33,6 +42,7 @@ int main(void)
 {
   marker (0);
   marker (0);
+  f_gccbug49906 ();  /* set breakpoint here */
 
   return 0;
 }