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gcc/
2008-07-02 Joseph Myers <joseph@codesourcery.com>
* c-incpath.c: Include toplev.h.
(merge_include_chains): Use warning instead of cpp_error for
system directory poisoning diagnostic.
* Makefile.in (c-incpath.o): Depend on toplev.h.
* gcc.c (LINK_COMMAND_SPEC): Pass
--error-poison-system-directories if
-Werror=poison-system-directories.
2007-06-13 Joseph Myers <joseph@codesourcery.com>
* common.opt (--Wno-poison-system-directories): New.
* doc/invoke.texi (-Wno-poison-system-directories): Document.
* c-incpath.c: Include flags.h.
(merge_include_chains): Check flag_poison_system_directories.
* gcc.c (LINK_COMMAND_SPEC): Pass --no-poison-system-directories
to linker if -Wno-poison-system-directories.
* Makefile.in (c-incpath.o): Depend on $(FLAGS_H).
2007-03-20 Daniel Jacobowitz <dan@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* configure.ac (--enable-poison-system-directories): New option.
* configure, config.in: Regenerate.
* c-incpath.c (merge_include_chains): If
ENABLE_POISON_SYSTEM_DIRECTORIES defined, warn for use of
/usr/include, /usr/local/include or /usr/X11R6/include.
Index: gcc-4.6.0/gcc/common.opt
===================================================================
--- gcc-4.6.0.orig/gcc/common.opt
+++ gcc-4.6.0/gcc/common.opt
@@ -558,6 +558,10 @@ Wpadded
Common Var(warn_padded) Warning
Warn when padding is required to align structure members
+Wpoison-system-directories
+Common Var(flag_poison_system_directories) Init(1) Warning
+Warn for -I and -L options using system directories if cross compiling
+
Wshadow
Common Var(warn_shadow) Warning
Warn when one local variable shadows another
Index: gcc-4.6.0/gcc/config.in
===================================================================
--- gcc-4.6.0.orig/gcc/config.in
+++ gcc-4.6.0/gcc/config.in
@@ -144,6 +144,12 @@
#endif
+/* Define to warn for use of native system header directories */
+#ifndef USED_FOR_TARGET
+#undef ENABLE_POISON_SYSTEM_DIRECTORIES
+#endif
+
+
/* Define if you want all operations on RTL (the basic data structure of the
optimizer and back end) to be checked for dynamic type safety at runtime.
This is quite expensive. */
Index: gcc-4.6.0/gcc/configure.ac
===================================================================
--- gcc-4.6.0.orig/gcc/configure.ac
+++ gcc-4.6.0/gcc/configure.ac
@@ -4694,6 +4694,16 @@ else
fi)
AC_SUBST(slibdir)
+AC_ARG_ENABLE([poison-system-directories],
+ AS_HELP_STRING([--enable-poison-system-directories],
+ [warn for use of native system header directories]),,
+ [enable_poison_system_directories=no])
+if test "x${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-4.6.0/gcc/doc/invoke.texi
===================================================================
--- gcc-4.6.0.orig/gcc/doc/invoke.texi
+++ gcc-4.6.0/gcc/doc/invoke.texi
@@ -257,6 +257,7 @@ 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
@@ -3773,6 +3774,14 @@ headers---for that, @option{-Wunknown-pr
for most targets, it is made up of code and thus requires the stack
to be made executable in order for the program to work properly.
+@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-4.6.0/gcc/gcc.c
===================================================================
--- gcc-4.6.0.orig/gcc/gcc.c
+++ gcc-4.6.0/gcc/gcc.c
@@ -659,6 +659,8 @@ proper position among the other output f
%{flto} %{flto=*} %l " LINK_PIE_SPEC \
"%X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!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) " STACK_SPLIT_SPEC "\
Index: gcc-4.6.0/gcc/incpath.c
===================================================================
--- gcc-4.6.0.orig/gcc/incpath.c
+++ gcc-4.6.0/gcc/incpath.c
@@ -353,6 +353,24 @@ 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
Index: gcc-4.6.0/gcc/Makefile.in
===================================================================
--- gcc-4.6.0.orig/gcc/Makefile.in
+++ gcc-4.6.0/gcc/Makefile.in
@@ -2179,7 +2179,7 @@ attribs.o : attribs.c $(CONFIG_H) $(SYST
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
prefix.o: prefix.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) prefix.h \
Makefile $(BASEVER)
Index: gcc-4.6.0/gcc/configure
===================================================================
--- gcc-4.6.0.orig/gcc/configure
+++ gcc-4.6.0/gcc/configure
@@ -912,6 +912,7 @@ with_system_zlib
enable_maintainer_mode
enable_version_specific_runtime_libs
with_slibdir
+enable_poison_system_directories
enable_plugin
enable_libquadmath_support
'
@@ -1623,6 +1624,8 @@ Optional Features:
--enable-version-specific-runtime-libs
specify that runtime libraries should be
installed in a compiler-specific directory
+ --enable-poison-system-directories
+ warn for use of native system header directories
--enable-plugin enable plugin support
--disable-libquadmath-support
disable libquadmath support for Fortran
@@ -17508,7 +17511,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17511 "configure"
+#line 17514 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -17614,7 +17617,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17617 "configure"
+#line 17620 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -26127,6 +26130,19 @@ fi
+# Check whether --enable-poison-system-directories was given.
+if test "${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
|
