--- /dev/null
+This patch is recived from Mark Hatle
+
+purpose: warn for uses of system directories when cross linking
+
+Signed-Off-By: Mark Hatle <mark.hatle@windriver.com>
+
+Code Merged from Sourcery G++ binutils 2.19 - 4.4-277\r
+\r
+2008-07-02 Joseph Myers <joseph@codesourcery.com>\r
+\r
+ ld/\r
+ * ld.h (args_type): Add error_poison_system_directories.\r
+ * ld.texinfo (--error-poison-system-directories): Document.\r
+ * ldfile.c (ldfile_add_library_path): Check\r
+ command_line.error_poison_system_directories.\r
+ * ldmain.c (main): Initialize\r
+ command_line.error_poison_system_directories.\r
+ * lexsup.c (enum option_values): Add\r
+ OPTION_ERROR_POISON_SYSTEM_DIRECTORIES.\r
+ (ld_options): Add --error-poison-system-directories.\r
+ (parse_args): Handle new option. \r
+\r
+2007-06-13 Joseph Myers <joseph@codesourcery.com>\r
+\r
+ ld/\r
+ * config.in: Regenerate.\r
+ * ld.h (args_type): Add poison_system_directories.\r
+ * ld.texinfo (--no-poison-system-directories): Document.\r
+ * ldfile.c (ldfile_add_library_path): Check\r
+ command_line.poison_system_directories.\r
+ * ldmain.c (main): Initialize\r
+ command_line.poison_system_directories.\r
+ * lexsup.c (enum option_values): Add\r
+ OPTION_NO_POISON_SYSTEM_DIRECTORIES.\r
+ (ld_options): Add --no-poison-system-directories.\r
+ (parse_args): Handle new option.\r
+\r
+2007-04-20 Joseph Myers <joseph@codesourcery.com>\r
+\r
+ Merge from Sourcery G++ binutils 2.17:\r
+\r
+ 2007-03-20 Joseph Myers <joseph@codesourcery.com>\r
+ Based on patch by Mark Hatle <mark.hatle@windriver.com>.\r
+ ld/\r
+ * configure.in (--enable-poison-system-directories): New option.\r
+ * configure, config.in: Regenerate.\r
+ * ldfile.c (ldfile_add_library_path): If\r
+ ENABLE_POISON_SYSTEM_DIRECTORIES defined, warn for use of /lib,\r
+ /usr/lib, /usr/local/lib or /usr/X11R6/lib.\r
+\r
+Index: binutils-2.20.1/ld/config.in
+===================================================================
+--- binutils-2.20.1.orig/ld/config.in
++++ binutils-2.20.1/ld/config.in
+@@ -4,6 +4,9 @@
+ language is requested. */
+ #undef ENABLE_NLS
+
++/* Define to warn for use of native system library directories */
++#undef ENABLE_POISON_SYSTEM_DIRECTORIES
++
+ /* Additional extension a shared object might have. */
+ #undef EXTRA_SHLIB_EXTENSION
+
+Index: binutils-2.20.1/ld/configure.in
+===================================================================
+--- binutils-2.20.1.orig/ld/configure.in
++++ binutils-2.20.1/ld/configure.in
+@@ -69,6 +69,16 @@ AC_SUBST(use_sysroot)
+ AC_SUBST(TARGET_SYSTEM_ROOT)
+ AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
+
++AC_ARG_ENABLE([poison-system-directories],
++ AS_HELP_STRING([--enable-poison-system-directories],
++ [warn for use of native system library directories]),,
++ [enable_poison_system_directories=no])
++if test "x${enable_poison_system_directories}" = "xyes"; then
++ AC_DEFINE([ENABLE_POISON_SYSTEM_DIRECTORIES],
++ [1],
++ [Define to warn for use of native system library directories])
++fi
++
+ AC_ARG_ENABLE([got],
+ AS_HELP_STRING([--enable-got=<type>],
+ [GOT handling scheme (target, single, negative, multigot)]),
+Index: binutils-2.20.1/ld/ld.h
+===================================================================
+--- binutils-2.20.1.orig/ld/ld.h
++++ binutils-2.20.1/ld/ld.h
+@@ -176,6 +176,14 @@ typedef struct {
+ input files. */
+ bfd_boolean accept_unknown_input_arch;
+
++ /* If TRUE (the default) warn for uses of system directories when
++ cross linking. */
++ bfd_boolean poison_system_directories;
++
++ /* If TRUE (default FALSE) give an error for uses of system
++ directories when cross linking instead of a warning. */
++ bfd_boolean error_poison_system_directories;
++
+ /* Big or little endian as set on command line. */
+ enum endian_enum endian;
+
+Index: binutils-2.20.1/ld/ld.texinfo
+===================================================================
+--- binutils-2.20.1.orig/ld/ld.texinfo
++++ binutils-2.20.1/ld/ld.texinfo
+@@ -2084,6 +2084,18 @@ string identifying the original linked f
+
+ Passing @code{none} for @var{style} disables the setting from any
+ @code{--build-id} options earlier on the command line.
++
++@kindex --no-poison-system-directories
++@item --no-poison-system-directories
++Do not warn for @option{-L} options using system directories such as
++@file{/usr/lib} when cross linking. This option is intended for use
++in chroot environments when such directories contain the correct
++libraries for the target system rather than the host.
++
++@kindex --error-poison-system-directories
++@item --error-poison-system-directories
++Give an error instead of a warning for @option{-L} options using
++system directories when cross linking.
+ @end table
+
+ @c man end
+Index: binutils-2.20.1/ld/ldfile.c
+===================================================================
+--- binutils-2.20.1.orig/ld/ldfile.c
++++ binutils-2.20.1/ld/ldfile.c
+@@ -120,6 +120,23 @@ ldfile_add_library_path (const char *nam
+ {
+ new_dirs->name = xstrdup (name);
+ new_dirs->sysrooted = is_sysrooted_pathname (name, FALSE);
++
++#ifdef ENABLE_POISON_SYSTEM_DIRECTORIES
++ if (command_line.poison_system_directories
++ && ((!strncmp (name, "/lib", 4))
++ || (!strncmp (name, "/usr/lib", 8))
++ || (!strncmp (name, "/usr/local/lib", 14))
++ || (!strncmp (name, "/usr/X11R6/lib", 14))))
++ {
++ if (command_line.error_poison_system_directories)
++ einfo (_("%X%P: error: library search path \"%s\" is unsafe for "
++ "cross-compilation\n"), name);
++ else
++ einfo (_("%P: warning: library search path \"%s\" is unsafe for "
++ "cross-compilation\n"), name);
++ }
++#endif
++
+ }
+ }
+
+Index: binutils-2.20.1/ld/ldmain.c
+===================================================================
+--- binutils-2.20.1.orig/ld/ldmain.c
++++ binutils-2.20.1/ld/ldmain.c
+@@ -252,6 +252,8 @@ main (int argc, char **argv)
+ command_line.warn_mismatch = TRUE;
+ command_line.warn_search_mismatch = TRUE;
+ command_line.check_section_addresses = -1;
++ command_line.poison_system_directories = TRUE;
++ command_line.error_poison_system_directories = FALSE;
+
+ /* We initialize DEMANGLING based on the environment variable
+ COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
+Index: binutils-2.20.1/ld/lexsup.c
+===================================================================
+--- binutils-2.20.1.orig/ld/lexsup.c
++++ binutils-2.20.1/ld/lexsup.c
+@@ -166,7 +166,9 @@ enum option_values
+ OPTION_WARN_SHARED_TEXTREL,
+ OPTION_WARN_ALTERNATE_EM,
+ OPTION_REDUCE_MEMORY_OVERHEADS,
+- OPTION_DEFAULT_SCRIPT
++ OPTION_DEFAULT_SCRIPT,
++ OPTION_NO_POISON_SYSTEM_DIRECTORIES,
++ OPTION_ERROR_POISON_SYSTEM_DIRECTORIES
+ };
+
+ /* The long options. This structure is used for both the option
+@@ -575,6 +577,14 @@ static const struct ld_option ld_options
+ TWO_DASHES },
+ { {"wrap", required_argument, NULL, OPTION_WRAP},
+ '\0', N_("SYMBOL"), N_("Use wrapper functions for SYMBOL"), TWO_DASHES },
++ { {"no-poison-system-directories", no_argument, NULL,
++ OPTION_NO_POISON_SYSTEM_DIRECTORIES},
++ '\0', NULL, N_("Do not warn for -L options using system directories"),
++ TWO_DASHES },
++ { {"error-poison-system-directories", no_argument, NULL,
++ OPTION_ERROR_POISON_SYSTEM_DIRECTORIES},
++ '\0', NULL, N_("Give an error for -L options using system directories"),
++ TWO_DASHES },
+ };
+
+ #define OPTION_COUNT ARRAY_SIZE (ld_options)
+@@ -1480,6 +1490,14 @@ parse_args (unsigned argc, char **argv)
+ einfo (_("%P%X: --hash-size needs a numeric argument\n"));
+ }
+ break;
++
++ case OPTION_NO_POISON_SYSTEM_DIRECTORIES:
++ command_line.poison_system_directories = FALSE;
++ break;
++
++ case OPTION_ERROR_POISON_SYSTEM_DIRECTORIES:
++ command_line.error_poison_system_directories = TRUE;
++ break;
+ }
+ }
+
