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2010-06-28 Julian Brown <julian@codesourcery.com>
Merge from Sourcery G++ 4.4:
Daniel Jacobowitz <dan@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
gcc/
* doc/invoke.texi (-Wno-poison-system-directories): Document.
* gcc.c (LINK_COMMAND_SPEC): Pass --no-poison-system-directories
if -Wno-poison-system-directories and --error-poison-system-directories
if -Werror=poison-system-directories to linker.
* incpath.c: Include flags.h. Include toplev.h.
(merge_include_chains): If ENABLE_POISON_SYSTEM_DIRECTORIES defined
and flag_poison_system_directories is true, warn for use of
/usr/include, /usr/local/include or /usr/X11R6/include.
* Makefile.in (incpath.o): Depend on $(FLAGS_H) and toplev.h.
* common.opt (--Wno-poison-system-directories): New.
* configure.ac (--enable-poison-system-directories): New option.
* configure: Regenerate.
* config.in: Regenerate.
Index: gcc-4.5/gcc/Makefile.in
===================================================================
--- gcc-4.5.orig/gcc/Makefile.in 2010-09-23 16:44:12.000000000 -0700
+++ gcc-4.5/gcc/Makefile.in 2010-09-23 16:46:33.552416860 -0700
@@ -1969,7 +1969,7 @@ gcc.srcextra: gengtype-lex.c
incpath.o: incpath.c incpath.h $(CONFIG_H) $(SYSTEM_H) $(CPPLIB_H) \
intl.h prefix.h coretypes.h $(TM_H) cppdefault.h $(TARGET_H) \
- $(MACHMODE_H)
+ $(MACHMODE_H) $(FLAGS_H) toplev.h
c-decl.o : c-decl.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) \
$(RTL_H) $(C_TREE_H) $(GGC_H) $(TARGET_H) $(FLAGS_H) $(FUNCTION_H) output.h \
Index: gcc-4.5/gcc/common.opt
===================================================================
--- gcc-4.5.orig/gcc/common.opt 2010-07-11 16:14:47.000000000 -0700
+++ gcc-4.5/gcc/common.opt 2010-09-23 16:46:33.556418045 -0700
@@ -152,6 +152,10 @@ Wpadded
Common Var(warn_padded) Warning
Warn when padding is required to align structure members
+Wpoison-system-directories
+Common Var(flag_poison_system_directories) Init(1)
+Warn for -I and -L options using system directories if cross compiling
+
Wshadow
Common Var(warn_shadow) Warning
Warn when one local variable shadows another
Index: gcc-4.5/gcc/config.in
===================================================================
--- gcc-4.5.orig/gcc/config.in 2010-07-11 16:14:46.000000000 -0700
+++ gcc-4.5/gcc/config.in 2010-09-23 16:46:33.556418045 -0700
@@ -132,6 +132,12 @@
#endif
+/* Define to warn for use of native system header directories */
+#ifndef USED_FOR_TARGET
+#undef ENABLE_POISON_SYSTEM_DIRECTORIES
+#endif
+
+
/* Define if you want all operations on RTL (the basic data structure of the
optimizer and back end) to be checked for dynamic type safety at runtime.
This is quite expensive. */
Index: gcc-4.5/gcc/configure
===================================================================
--- gcc-4.5.orig/gcc/configure 2010-09-23 16:44:11.000000000 -0700
+++ gcc-4.5/gcc/configure 2010-09-23 16:46:33.572415719 -0700
@@ -913,6 +913,7 @@ with_system_zlib
enable_maintainer_mode
enable_version_specific_runtime_libs
with_slibdir
+enable_poison_system_directories
enable_plugin
'
ac_precious_vars='build_alias
@@ -1620,6 +1621,8 @@ Optional Features:
--enable-version-specific-runtime-libs
specify that runtime libraries should be
installed in a compiler-specific directory
+ --enable-poison-system-directories
+ warn for use of native system header directories
--enable-plugin enable plugin support
Optional Packages:
@@ -25345,6 +25348,19 @@ 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
+
+$as_echo "#define ENABLE_POISON_SYSTEM_DIRECTORIES 1" >>confdefs.h
+
+fi
+
# Substitute configuration variables
Index: gcc-4.5/gcc/configure.ac
===================================================================
--- gcc-4.5.orig/gcc/configure.ac 2010-09-23 16:44:11.000000000 -0700
+++ gcc-4.5/gcc/configure.ac 2010-09-23 16:46:33.576417624 -0700
@@ -4439,6 +4439,16 @@ else
fi)
AC_SUBST(slibdir)
+AC_ARG_ENABLE([poison-system-directories],
+ AS_HELP_STRING([--enable-poison-system-directories],
+ [warn for use of native system header directories]),,
+ [enable_poison_system_directories=no])
+if test "x${enable_poison_system_directories}" = "xyes"; then
+ AC_DEFINE([ENABLE_POISON_SYSTEM_DIRECTORIES],
+ [1],
+ [Define to warn for use of native system header directories])
+fi
+
# Substitute configuration variables
AC_SUBST(subdirs)
AC_SUBST(srcdir)
Index: gcc-4.5/gcc/doc/invoke.texi
===================================================================
--- gcc-4.5.orig/gcc/doc/invoke.texi 2010-09-23 15:33:28.000000000 -0700
+++ gcc-4.5/gcc/doc/invoke.texi 2010-09-23 16:46:33.584416934 -0700
@@ -252,6 +252,7 @@ Objective-C and Objective-C++ Dialects}.
-Woverlength-strings -Wpacked -Wpacked-bitfield-compat -Wpadded @gol
-Wparentheses -Wpedantic-ms-format -Wno-pedantic-ms-format @gol
-Wpointer-arith -Wno-pointer-to-int-cast @gol
+-Wno-poison-system-directories @gol
-Wredundant-decls @gol
-Wreturn-type -Wsequence-point -Wshadow @gol
-Wsign-compare -Wsign-conversion -Wstack-protector @gol
@@ -3603,6 +3604,14 @@ code. However, note that using @option{
option will @emph{not} warn about unknown pragmas in system
headers---for that, @option{-Wunknown-pragmas} must also be used.
+@item -Wno-poison-system-directories
+@opindex Wno-poison-system-directories
+Do not warn for @option{-I} or @option{-L} options using system
+directories such as @file{/usr/include} when cross compiling. This
+option is intended for use in chroot environments when such
+directories contain the correct headers and libraries for the target
+system rather than the host.
+
@item -Wfloat-equal
@opindex Wfloat-equal
@opindex Wno-float-equal
Index: gcc-4.5/gcc/gcc.c
===================================================================
--- gcc-4.5.orig/gcc/gcc.c 2010-07-11 16:14:46.000000000 -0700
+++ gcc-4.5/gcc/gcc.c 2010-09-23 16:46:33.588417920 -0700
@@ -792,6 +792,8 @@ proper position among the other output f
%{flto} %{fwhopr} %l " LINK_PIE_SPEC \
"%X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{x} %{z} %{Z} %{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
+ %{Wno-poison-system-directories:--no-poison-system-directories}\
+ %{Werror=poison-system-directories:--error-poison-system-directories}\
%{static:} %{L*} %(mfwrap) %(link_libgcc) %o\
%{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)} %(mflib)\
%{fprofile-arcs|fprofile-generate*|coverage:-lgcov}\
Index: gcc-4.5/gcc/incpath.c
===================================================================
--- gcc-4.5.orig/gcc/incpath.c 2010-07-11 16:14:44.000000000 -0700
+++ gcc-4.5/gcc/incpath.c 2010-09-23 16:46:33.588417920 -0700
@@ -30,6 +30,8 @@
#include "intl.h"
#include "incpath.h"
#include "cppdefault.h"
+#include "flags.h"
+#include "toplev.h"
/* Microsoft Windows does not natively support inodes.
VMS has non-numeric inodes. */
@@ -353,6 +355,24 @@ merge_include_chains (const char *sysroo
}
fprintf (stderr, _("End of search list.\n"));
}
+
+#ifdef ENABLE_POISON_SYSTEM_DIRECTORIES
+ if (flag_poison_system_directories)
+ {
+ struct cpp_dir *p;
+
+ for (p = heads[QUOTE]; p; p = p->next)
+ {
+ if ((!strncmp (p->name, "/usr/include", 12))
+ || (!strncmp (p->name, "/usr/local/include", 18))
+ || (!strncmp (p->name, "/usr/X11R6/include", 18)))
+ warning (OPT_Wpoison_system_directories,
+ "include location \"%s\" is unsafe for "
+ "cross-compilation",
+ p->name);
+ }
+ }
+#endif
}
/* Use given -I paths for #include "..." but not #include <...>, and
|
