gcc: remove unsafe patch check (poison system dirs) patch

Now that the calls to gcc always pass through the toolchain wrapper, it
is no longer necessary to patch gcc to support poisoning.

This does have the disadvantage that there is no unsafe path check for
libc, libgcc and libstdc++ (all of these are built before the wrapper
exists). But we can assume that the toolchain components themselves
should be pretty safe.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gcc/4.7.4/910-gcc-poison-system-directories.patch

@@ -1,207 +0,0 @@
-From 160397ef3c3331099af028f1b8d3e085b07d88ad Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 08:59:00 +0400
-Subject: [PATCH 16/35] gcc: poison-system-directories
-
-Adapted to Buildroot and gcc 4.7.4 by Thomas Petazzoni, especially the
-addition of the BR_COMPILER_PARANOID_UNSAFE_PATH environment variable.
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Upstream-Status: Inappropriate [distribution: codesourcery]
----
- gcc/Makefile.in     |    2 +-
- gcc/common.opt      |    4 ++++
- gcc/config.in       |    6 ++++++
- gcc/configure       |   20 ++++++++++++++++++--
- gcc/configure.ac    |   10 ++++++++++
- gcc/doc/invoke.texi |    9 +++++++++
- gcc/gcc.c           |    2 ++
- gcc/incpath.c       |   19 +++++++++++++++++++
- 8 files changed, 69 insertions(+), 3 deletions(-)
-
-Index: b/gcc/common.opt
-===================================================================
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -585,6 +585,10 @@
- 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: b/gcc/config.in
-===================================================================
---- a/gcc/config.in
-+++ b/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: b/gcc/configure
-===================================================================
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -918,6 +918,7 @@
- with_system_zlib
- enable_maintainer_mode
- enable_version_specific_runtime_libs
-+enable_poison_system_directories
- enable_plugin
- enable_libquadmath_support
- with_linker_hash_style
-@@ -1632,6 +1633,8 @@
-   --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
-@@ -27186,6 +27189,19 @@
- 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: b/gcc/configure.ac
-===================================================================
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -5037,6 +5037,16 @@
-                 [specify that runtime libraries should be
-                  installed in a compiler-specific directory])])
- 
-+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: b/gcc/doc/invoke.texi
-===================================================================
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -260,6 +260,7 @@
- -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
-@@ -3880,6 +3881,14 @@
-  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: b/gcc/gcc.c
-===================================================================
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -674,6 +674,8 @@
-     %{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)}\
-     %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
-@@ -3907,6 +3909,12 @@
-       gcc_assert (!compare_debug_opt);
-     }
- 
-+  temp = getenv("BR_COMPILER_PARANOID_UNSAFE_PATH");
-+  if (temp && strlen(temp) > 0)
-+    {
-+      save_switch("-Werror=poison-system-directories", 0, NULL, false);
-+    }
-+
-   /* Set up the search paths.  We add directories that we expect to
-      contain GNU Toolchain components before directories specified by
-      the machine description so that we will find GNU components (like
-Index: b/gcc/incpath.c
-===================================================================
---- a/gcc/incpath.c
-+++ b/gcc/incpath.c
-@@ -30,6 +30,7 @@
- #include "intl.h"
- #include "incpath.h"
- #include "cppdefault.h"
-+#include "diagnostic-core.h"
- 
- /* Microsoft Windows does not natively support inodes.
-    VMS has non-numeric inodes.  */
-@@ -373,6 +374,24 @@
- 	}
-       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

package/gcc/4.8.5/910-gcc-poison-system-directories.patch

@@ -1,207 +0,0 @@
-From 160397ef3c3331099af028f1b8d3e085b07d88ad Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 08:59:00 +0400
-Subject: [PATCH 16/35] gcc: poison-system-directories
-
-Adapted to Buildroot and gcc 4.8.3 by Thomas Petazzoni, especially the
-addition of the BR_COMPILER_PARANOID_UNSAFE_PATH environment variable.
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Upstream-Status: Inappropriate [distribution: codesourcery]
----
- gcc/Makefile.in     |    2 +-
- gcc/common.opt      |    4 ++++
- gcc/config.in       |    6 ++++++
- gcc/configure       |   20 ++++++++++++++++++--
- gcc/configure.ac    |   10 ++++++++++
- gcc/doc/invoke.texi |    9 +++++++++
- gcc/gcc.c           |    2 ++
- gcc/incpath.c       |   19 +++++++++++++++++++
- 8 files changed, 69 insertions(+), 3 deletions(-)
-
-Index: b/gcc/common.opt
-===================================================================
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -595,6 +595,10 @@
- Common Var(pedantic) Warning
- Issue warnings needed for strict compliance to the standard
- 
-+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: b/gcc/config.in
-===================================================================
---- a/gcc/config.in
-+++ b/gcc/config.in
-@@ -138,6 +138,12 @@
- #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: b/gcc/configure
-===================================================================
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -917,6 +917,7 @@
- with_system_zlib
- enable_maintainer_mode
- enable_version_specific_runtime_libs
-+enable_poison_system_directories
- enable_plugin
- enable_libquadmath_support
- with_linker_hash_style
-@@ -1630,6 +1631,8 @@
-   --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
-@@ -27195,6 +27198,19 @@
- 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: b/gcc/configure.ac
-===================================================================
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -5101,6 +5101,16 @@
-                 [specify that runtime libraries should be
-                  installed in a compiler-specific directory])])
- 
-+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: b/gcc/doc/invoke.texi
-===================================================================
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -258,6 +258,7 @@
- -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  -Wno-return-local-addr @gol
- -Wreturn-type  -Wsequence-point  -Wshadow @gol
- -Wsign-compare  -Wsign-conversion  -Wsizeof-pointer-memaccess @gol
-@@ -4020,6 +4021,14 @@
-  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: b/gcc/gcc.c
-===================================================================
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -741,6 +741,8 @@
-    "%{fuse-ld=*:-fuse-ld=%*}\
-     %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) " SANITIZER_EARLY_SPEC " %o\
-     %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
-     %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
-@@ -3991,6 +3993,12 @@
-       gcc_assert (!compare_debug_opt);
-     }
- 
-+  temp = getenv("BR_COMPILER_PARANOID_UNSAFE_PATH");
-+  if (temp && strlen(temp) > 0)
-+    {
-+      save_switch("-Werror=poison-system-directories", 0, NULL, false, true);
-+    }
-+
-   /* Set up the search paths.  We add directories that we expect to
-      contain GNU Toolchain components before directories specified by
-      the machine description so that we will find GNU components (like
-Index: b/gcc/incpath.c
-===================================================================
---- a/gcc/incpath.c
-+++ b/gcc/incpath.c
-@@ -28,6 +28,7 @@
- #include "intl.h"
- #include "incpath.h"
- #include "cppdefault.h"
-+#include "diagnostic-core.h"
- 
- /* Microsoft Windows does not natively support inodes.
-    VMS has non-numeric inodes.  */
-@@ -382,6 +383,24 @@
- 	}
-       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

package/gcc/4.9.3/910-gcc-poison-system-directories.patch

@@ -1,207 +0,0 @@
-From 160397ef3c3331099af028f1b8d3e085b07d88ad Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 08:59:00 +0400
-Subject: [PATCH 16/35] gcc: poison-system-directories
-
-Adapted to Buildroot and gcc 4.9.1 by Thomas Petazzoni, especially the
-addition of the BR_COMPILER_PARANOID_UNSAFE_PATH environment variable.
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Upstream-Status: Inappropriate [distribution: codesourcery]
----
- gcc/Makefile.in     |    2 +-
- gcc/common.opt      |    4 ++++
- gcc/config.in       |    6 ++++++
- gcc/configure       |   20 ++++++++++++++++++--
- gcc/configure.ac    |   10 ++++++++++
- gcc/doc/invoke.texi |    9 +++++++++
- gcc/gcc.c           |    2 ++
- gcc/incpath.c       |   19 +++++++++++++++++++
- 8 files changed, 69 insertions(+), 3 deletions(-)
-
-Index: b/gcc/common.opt
-===================================================================
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -603,6 +603,10 @@
- Common Var(pedantic) Warning
- Issue warnings needed for strict compliance to the standard
- 
-+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: b/gcc/config.in
-===================================================================
---- a/gcc/config.in
-+++ b/gcc/config.in
-@@ -138,6 +138,12 @@
- #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: b/gcc/configure
-===================================================================
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -929,6 +929,7 @@
- enable_maintainer_mode
- enable_link_mutex
- enable_version_specific_runtime_libs
-+enable_poison_system_directories
- enable_plugin
- enable_host_shared
- enable_libquadmath_support
-@@ -1657,6 +1658,8 @@
-   --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
-   --enable-host-shared    build host code as shared libraries
-   --disable-libquadmath-support
-@@ -27765,6 +27768,19 @@
- 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: b/gcc/configure.ac
-===================================================================
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -5411,6 +5411,16 @@
-                 [specify that runtime libraries should be
-                  installed in a compiler-specific directory])])
- 
-+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: b/gcc/doc/invoke.texi
-===================================================================
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -260,6 +260,7 @@
- -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  -Wno-return-local-addr @gol
- -Wreturn-type  -Wsequence-point  -Wshadow @gol
- -Wsign-compare  -Wsign-conversion -Wfloat-conversion @gol
-@@ -4209,6 +4210,14 @@
-  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: b/gcc/gcc.c
-===================================================================
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -770,6 +770,8 @@
-    "%{fuse-ld=*:-fuse-ld=%*}\
-     %X %{o*} %{e*} %{N} %{n} %{r}\
-     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
-+    %{Wno-poison-system-directories:--no-poison-system-directories}\
-+    %{Werror=poison-system-directories:--error-poison-system-directories}\
-     %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
-     %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
-     %{fcilkplus:%:include(libcilkrts.spec)%(link_cilkrts)}\
-@@ -4034,6 +4036,12 @@
-       gcc_assert (!compare_debug_opt);
-     }
- 
-+  temp = getenv("BR_COMPILER_PARANOID_UNSAFE_PATH");
-+  if (temp && strlen(temp) > 0)
-+    {
-+      save_switch("-Werror=poison-system-directories", 0, NULL, false, true);
-+    }
-+
-   /* Set up the search paths.  We add directories that we expect to
-      contain GNU Toolchain components before directories specified by
-      the machine description so that we will find GNU components (like
-Index: b/gcc/incpath.c
-===================================================================
---- a/gcc/incpath.c
-+++ b/gcc/incpath.c
-@@ -28,6 +28,7 @@
- #include "intl.h"
- #include "incpath.h"
- #include "cppdefault.h"
-+#include "diagnostic-core.h"
- 
- /* Microsoft Windows does not natively support inodes.
-    VMS has non-numeric inodes.  */
-@@ -382,6 +383,24 @@
- 	}
-       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

package/gcc/5.2.0/200-gcc-poison-system-directories.patch

@@ -1,207 +0,0 @@
-From 160397ef3c3331099af028f1b8d3e085b07d88ad Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 08:59:00 +0400
-Subject: [PATCH 16/35] gcc: poison-system-directories
-
-Adapted to Buildroot and gcc 4.9.1 by Thomas Petazzoni, especially the
-addition of the BR_COMPILER_PARANOID_UNSAFE_PATH environment variable.
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Upstream-Status: Inappropriate [distribution: codesourcery]
----
- gcc/Makefile.in     |    2 +-
- gcc/common.opt      |    4 ++++
- gcc/config.in       |    6 ++++++
- gcc/configure       |   20 ++++++++++++++++++--
- gcc/configure.ac    |   10 ++++++++++
- gcc/doc/invoke.texi |    9 +++++++++
- gcc/gcc.c           |    2 ++
- gcc/incpath.c       |   19 +++++++++++++++++++
- 8 files changed, 69 insertions(+), 3 deletions(-)
-
-Index: b/gcc/common.opt
-===================================================================
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -623,6 +623,10 @@
- Common Var(warn_return_local_addr) Init(1) Warning
- Warn about returning a pointer/reference to a local or temporary variable.
- 
-+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: b/gcc/config.in
-===================================================================
---- a/gcc/config.in
-+++ b/gcc/config.in
-@@ -168,6 +168,12 @@
- #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: b/gcc/configure
-===================================================================
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -932,6 +932,7 @@
- enable_maintainer_mode
- enable_link_mutex
- enable_version_specific_runtime_libs
-+enable_poison_system_directories
- enable_plugin
- enable_host_shared
- enable_libquadmath_support
-@@ -1661,6 +1662,8 @@
-   --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
-   --enable-host-shared    build host code as shared libraries
-   --disable-libquadmath-support
-@@ -28087,6 +28090,19 @@
- 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: b/gcc/configure.ac
-===================================================================
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -5571,6 +5571,16 @@
-                 [specify that runtime libraries should be
-                  installed in a compiler-specific directory])])
- 
-+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: b/gcc/doc/invoke.texi
-===================================================================
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -269,6 +269,7 @@
- -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  -Wno-return-local-addr @gol
- -Wreturn-type  -Wsequence-point  -Wshadow  -Wno-shadow-ivar @gol
- -Wshift-count-negative -Wshift-count-overflow @gol
-@@ -4432,6 +4433,14 @@
- 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: b/gcc/gcc.c
-===================================================================
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -835,6 +835,8 @@
-    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
-    "%X %{o*} %{e*} %{N} %{n} %{r}\
-     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
-+    %{Wno-poison-system-directories:--no-poison-system-directories}\
-+    %{Werror=poison-system-directories:--error-poison-system-directories}\
-     %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
-     " CHKP_SPEC " \
-     %{fopenacc|fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
-@@ -4244,6 +4246,12 @@
-       gcc_assert (!compare_debug_opt);
-     }
- 
-+  temp = getenv("BR_COMPILER_PARANOID_UNSAFE_PATH");
-+  if (temp && strlen(temp) > 0)
-+    {
-+      save_switch("-Werror=poison-system-directories", 0, NULL, false, true);
-+    }
-+
-   /* Set up the search paths.  We add directories that we expect to
-      contain GNU Toolchain components before directories specified by
-      the machine description so that we will find GNU components (like
-Index: b/gcc/incpath.c
-===================================================================
---- a/gcc/incpath.c
-+++ b/gcc/incpath.c
-@@ -28,6 +28,7 @@
- #include "intl.h"
- #include "incpath.h"
- #include "cppdefault.h"
-+#include "diagnostic-core.h"
- 
- /* Microsoft Windows does not natively support inodes.
-    VMS has non-numeric inodes.  */
-@@ -383,6 +384,24 @@
- 	}
-       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

package/gcc/arc-2015.06/910-gcc-poison-system-directories.patch

@@ -1,221 +0,0 @@
-From 160397ef3c3331099af028f1b8d3e085b07d88ad Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 08:59:00 +0400
-Subject: [PATCH 16/35] gcc: poison-system-directories
-
-Adapted to Buildroot and gcc arc-4.8-R3 by Thomas Petazzoni,
-especially the addition of the BR_COMPILER_PARANOID_UNSAFE_PATH
-environment variable.
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-
-Upstream-Status: Inappropriate [distribution: codesourcery]
----
- gcc/Makefile.in     |    2 +-
- gcc/common.opt      |    4 ++++
- gcc/config.in       |    6 ++++++
- gcc/configure       |   20 ++++++++++++++++++--
- gcc/configure.ac    |   10 ++++++++++
- gcc/doc/invoke.texi |    9 +++++++++
- gcc/gcc.c           |    2 ++
- gcc/incpath.c       |   19 +++++++++++++++++++
- 8 files changed, 69 insertions(+), 3 deletions(-)
-
-Index: b/gcc/common.opt
-===================================================================
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -595,6 +595,10 @@
- Common Var(pedantic) Warning
- Issue warnings needed for strict compliance to the standard
- 
-+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: b/gcc/config.in
-===================================================================
---- a/gcc/config.in
-+++ b/gcc/config.in
-@@ -138,6 +138,12 @@
- #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: b/gcc/configure
-===================================================================
---- a/gcc/configure
-+++ b/gcc/configure
-@@ -917,6 +917,7 @@
- with_system_zlib
- enable_maintainer_mode
- enable_version_specific_runtime_libs
-+enable_poison_system_directories
- enable_plugin
- enable_libquadmath_support
- with_linker_hash_style
-@@ -1630,6 +1631,8 @@
-   --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
-@@ -27103,6 +27106,19 @@
- 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: b/gcc/configure.ac
-===================================================================
---- a/gcc/configure.ac
-+++ b/gcc/configure.ac
-@@ -5063,6 +5063,16 @@
-                 [specify that runtime libraries should be
-                  installed in a compiler-specific directory])])
- 
-+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: b/gcc/doc/invoke.texi
-===================================================================
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -258,6 +258,7 @@
- -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  -Wno-return-local-addr @gol
- -Wreturn-type  -Wsequence-point  -Wshadow @gol
- -Wsign-compare  -Wsign-conversion  -Wsizeof-pointer-memaccess @gol
-@@ -4025,6 +4026,14 @@
-  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: b/gcc/gcc.c
-===================================================================
---- a/gcc/gcc.c
-+++ b/gcc/gcc.c
-@@ -740,6 +740,8 @@
-    "%{fuse-ld=*:-fuse-ld=%*}\
-     %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) " SANITIZER_EARLY_SPEC " %o\
-     %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)}\
-     %{fgnu-tm:%:include(libitm.spec)%(link_itm)}\
-@@ -3990,6 +3992,12 @@
-       gcc_assert (!compare_debug_opt);
-     }
- 
-+  temp = getenv("BR_COMPILER_PARANOID_UNSAFE_PATH");
-+  if (temp && strlen(temp) > 0)
-+    {
-+      save_switch("-Werror=poison-system-directories", 0, NULL, false, true);
-+    }
-+
-   /* Set up the search paths.  We add directories that we expect to
-      contain GNU Toolchain components before directories specified by
-      the machine description so that we will find GNU components (like
-Index: b/gcc/incpath.c
-===================================================================
---- a/gcc/incpath.c
-+++ b/gcc/incpath.c
-@@ -28,6 +28,7 @@
- #include "intl.h"
- #include "incpath.h"
- #include "cppdefault.h"
-+#include "diagnostic-core.h"
- 
- /* Microsoft Windows does not natively support inodes.
-    VMS has non-numeric inodes.  */
-@@ -382,6 +383,24 @@
- 	}
-       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: b/gcc/config/arc/arc.h
-===================================================================
---- a/gcc/config/arc/arc.h
-+++ b/gcc/config/arc/arc.h
-@@ -205,6 +205,8 @@
- %{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
-     %(linker) %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:%:include(libgomp.spec)%(link_gomp)} %(mflib)\
-     %{fprofile-arcs|fprofile-generate|coverage:-lgcov}\

package/gcc/gcc-final/gcc-final.mk

@@ -50,7 +50,6 @@ GCC_FINAL_CROSS_LANGUAGES = $(subst $(space),$(comma),$(GCC_FINAL_CROSS_LANGUAGE
 HOST_GCC_FINAL_CONF_OPTS = \
 	$(HOST_GCC_COMMON_CONF_OPTS) \
 	--enable-languages=$(GCC_FINAL_CROSS_LANGUAGES) \
-	--enable-poison-system-directories \
 	--with-build-time-tools=$(HOST_DIR)/usr/$(GNU_TARGET_NAME)/bin
 
 HOST_GCC_FINAL_GCC_LIB_DIR = $(HOST_DIR)/usr/$(GNU_TARGET_NAME)/lib*