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Upstream-Status: Inappropriate [distribution: codesourcery]
Patch originally created by Mark Hatle, forward-ported to
binutils 2.21 by Scott Garman.
purpose: warn for uses of system directories when cross linking
Code Merged from Sourcery G++ binutils 2.19 - 4.4-277
2008-07-02 Joseph Myers <joseph@codesourcery.com>
ld/
* ld.h (args_type): Add error_poison_system_directories.
* ld.texinfo (--error-poison-system-directories): Document.
* ldfile.c (ldfile_add_library_path): Check
command_line.error_poison_system_directories.
* ldmain.c (main): Initialize
command_line.error_poison_system_directories.
* lexsup.c (enum option_values): Add
OPTION_ERROR_POISON_SYSTEM_DIRECTORIES.
(ld_options): Add --error-poison-system-directories.
(parse_args): Handle new option.
2007-06-13 Joseph Myers <joseph@codesourcery.com>
ld/
* config.in: Regenerate.
* ld.h (args_type): Add poison_system_directories.
* ld.texinfo (--no-poison-system-directories): Document.
* ldfile.c (ldfile_add_library_path): Check
command_line.poison_system_directories.
* ldmain.c (main): Initialize
command_line.poison_system_directories.
* lexsup.c (enum option_values): Add
OPTION_NO_POISON_SYSTEM_DIRECTORIES.
(ld_options): Add --no-poison-system-directories.
(parse_args): Handle new option.
2007-04-20 Joseph Myers <joseph@codesourcery.com>
Merge from Sourcery G++ binutils 2.17:
2007-03-20 Joseph Myers <joseph@codesourcery.com>
Based on patch by Mark Hatle <mark.hatle@windriver.com>.
ld/
* configure.in (--enable-poison-system-directories): New option.
* configure, config.in: Regenerate.
* ldfile.c (ldfile_add_library_path): If
ENABLE_POISON_SYSTEM_DIRECTORIES defined, warn for use of /lib,
/usr/lib, /usr/local/lib or /usr/X11R6/lib.
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Scott Garman <scott.a.garman@intel.com>
diff -urN binutils-2.21.orig//ld/config.in binutils-2.21/ld/config.in
--- binutils-2.21.orig//ld/config.in 2010-11-05 03:34:27.000000000 -0700
+++ binutils-2.21/ld/config.in 2011-01-19 10:48:15.147301022 -0800
@@ -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
diff -urN binutils-2.21.orig//ld/configure binutils-2.21/ld/configure
--- binutils-2.21.orig//ld/configure 2011-01-19 10:46:46.997571921 -0800
+++ binutils-2.21/ld/configure 2011-01-19 11:03:50.577832729 -0800
@@ -768,6 +768,7 @@
enable_targets
enable_64_bit_bfd
with_sysroot
+enable_poison_system_directories
enable_gold
enable_got
enable_werror
@@ -1418,6 +1419,8 @@
(and sometimes confusing) to the casual installer
--enable-targets alternative target configurations
--enable-64-bit-bfd 64-bit support (on hosts with narrower word sizes)
+ --enable-poison-system-directories
+ warn for use of native system library directories
--enable-gold[=ARG] build gold [ARG={default,yes,no}]
--enable-got=<type> GOT handling scheme (target, single, negative,
multigot)
@@ -4203,7 +4206,18 @@
fi
+# Check whether --enable-poison-system-directories was given.
+if test "${enable_poison_system_directories+set}" = set; then :
+ enableval=$enable_poison_system_directories;
+else
+ enable_poison_system_directories=no
+fi
+
+if test "x${enable_poison_system_directories}" = "xyes"; then
+$as_echo "#define ENABLE_POISON_SYSTEM_DIRECTORIES 1" >>confdefs.h
+
+fi
# Check whether --enable-got was given.
if test "${enable_got+set}" = set; then :
diff -urN binutils-2.21.orig//ld/configure.in binutils-2.21/ld/configure.in
--- binutils-2.21.orig//ld/configure.in 2010-11-23 05:50:32.000000000 -0800
+++ binutils-2.21/ld/configure.in 2011-01-19 10:50:57.378398946 -0800
@@ -69,6 +69,16 @@
AC_SUBST(TARGET_SYSTEM_ROOT)
AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
+AC_ARG_ENABLE([poison-system-directories],
+ AS_HELP_STRING([--enable-poison-system-directories],
+ [warn for use of native system library directories]),,
+ [enable_poison_system_directories=no])
+if test "x${enable_poison_system_directories}" = "xyes"; then
+ AC_DEFINE([ENABLE_POISON_SYSTEM_DIRECTORIES],
+ [1],
+ [Define to warn for use of native system library directories])
+fi
+
dnl Use --enable-gold to decide if this linker should be the default.
dnl "install_as_default" is set to false if gold is the default linker.
dnl "installed_linker" is the installed BFD linker name.
diff -urN binutils-2.21.orig//ld/ldfile.c binutils-2.21/ld/ldfile.c
--- binutils-2.21.orig//ld/ldfile.c 2011-01-19 10:46:47.157553281 -0800
+++ binutils-2.21/ld/ldfile.c 2011-01-19 10:58:30.035468447 -0800
@@ -124,6 +124,23 @@
{
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
+
}
}
diff -urN binutils-2.21.orig//ld/ld.h binutils-2.21/ld/ld.h
--- binutils-2.21.orig//ld/ld.h 2009-11-26 05:45:25.000000000 -0800
+++ binutils-2.21/ld/ld.h 2011-01-19 10:52:54.814716478 -0800
@@ -198,6 +198,14 @@
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;
diff -urN binutils-2.21.orig//ld/ldmain.c binutils-2.21/ld/ldmain.c
--- binutils-2.21.orig//ld/ldmain.c 2010-11-05 00:20:07.000000000 -0700
+++ binutils-2.21/ld/ldmain.c 2011-01-19 10:59:18.579767697 -0800
@@ -259,6 +259,8 @@
command_line.warn_search_mismatch = TRUE;
command_line.check_section_addresses = -1;
command_line.disable_target_specific_optimizations = -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
diff -urN binutils-2.21.orig//ld/ld.texinfo binutils-2.21/ld/ld.texinfo
--- binutils-2.21.orig//ld/ld.texinfo 2010-10-28 04:40:26.000000000 -0700
+++ binutils-2.21/ld/ld.texinfo 2011-01-19 10:56:04.452567113 -0800
@@ -2133,6 +2133,18 @@
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
diff -urN binutils-2.21.orig//ld/lexsup.c binutils-2.21/ld/lexsup.c
--- binutils-2.21.orig//ld/lexsup.c 2010-10-27 23:45:33.000000000 -0700
+++ binutils-2.21/ld/lexsup.c 2011-01-19 11:02:07.799898432 -0800
@@ -175,6 +175,8 @@
OPTION_PLUGIN_OPT,
#endif /* ENABLE_PLUGINS */
OPTION_DEFAULT_SCRIPT,
+ OPTION_NO_POISON_SYSTEM_DIRECTORIES,
+ OPTION_ERROR_POISON_SYSTEM_DIRECTORIES
};
/* The long options. This structure is used for both the option
@@ -603,6 +605,14 @@
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)
@@ -1518,6 +1528,14 @@
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;
}
}
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