1 files changed, 239 insertions, 0 deletions

diff --git a/meta-microblaze/recipes-devtools/gcc/gcc/0002-gcc-poison-system-directories.patch b/meta-microblaze/recipes-devtools/gcc/gcc/0002-gcc-poison-system-directories.patch
new file mode 100644
index 00000000..5aa635b3
--- /dev/null
+++ b/meta-microblaze/recipes-devtools/gcc/gcc/0002-gcc-poison-system-directories.patch
@@ -0,0 +1,239 @@
+From 99f1e61b2957226254a116fde7fd73bf07034012 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 8 Mar 2021 16:04:20 -0800
+Subject: [PATCH] gcc: poison-system-directories
+
+Add /sw/include and /opt/include based on the original
+zecke-no-host-includes.patch patch.  The original patch checked for
+/usr/include, /sw/include and /opt/include and then triggered a failure and
+aborted.
+
+Instead, we add the two missing items to the current scan.  If the user
+wants this to be a failure, they can add "-Werror=poison-system-directories".
+
+Upstream-Status: Pending
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ gcc/common.opt      |  4 ++++
+ gcc/config.in       | 10 ++++++++++
+ gcc/configure       | 19 +++++++++++++++++++
+ gcc/configure.ac    | 16 ++++++++++++++++
+ gcc/doc/invoke.texi |  9 +++++++++
+ gcc/gcc.cc          | 15 ++++++++++++---
+ gcc/incpath.cc      | 21 +++++++++++++++++++++
+ 7 files changed, 91 insertions(+), 3 deletions(-)
+
+diff --git a/gcc/common.opt b/gcc/common.opt
+index 8a0dafc52..0357868e2 100644
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -710,6 +710,10 @@ Wreturn-local-addr
+ 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 variable shadows another.  Same as -Wshadow=global.
+diff --git a/gcc/config.in b/gcc/config.in
+index 64c27c9cf..a693cb8a8 100644
+--- a/gcc/config.in
++++ b/gcc/config.in
+@@ -230,6 +230,16 @@
+ #endif
+ 
+ 
++/* Define to warn for use of native system header directories */
++#ifndef USED_FOR_TARGET
++#undef ENABLE_POISON_SYSTEM_DIRECTORIES
++#endif
++/* Define to warn for use of native system header directories */
++#ifndef USED_FOR_TARGET
++#undef POISON_BY_DEFAULT
++#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. */
+diff --git a/gcc/configure b/gcc/configure
+index 2b83acfb0..8bb97578c 100755
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -1023,6 +1023,7 @@ enable_maintainer_mode
+ enable_link_mutex
+ enable_link_serialization
+ enable_version_specific_runtime_libs
++enable_poison_system_directories
+ enable_plugin
+ enable_host_shared
+ enable_libquadmath_support
+@@ -1785,6 +1786,8 @@ 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
+   --enable-host-shared    build host code as shared libraries
+   --disable-libquadmath-support
+@@ -31996,6 +31999,22 @@ if test "${enable_version_specific_runtime_libs+set}" = set; then :
+ fi
+ 
+ 
++# Check whether --enable-poison-system-directories was given.
++if test "${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}" != "xno"; then
++
++$as_echo "#define ENABLE_POISON_SYSTEM_DIRECTORIES 1" >>confdefs.h
++if test "$enable_poison_system_directories" = "error"; then
++$as_echo "#define POISON_BY_DEFAULT 1" >>confdefs.h
++fi
++
++fi
++
+ # Substitute configuration variables
+ 
+ 
+diff --git a/gcc/configure.ac b/gcc/configure.ac
+index daf2a708c..6155b83a7 100644
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -7435,6 +7435,22 @@ AC_ARG_ENABLE(version-specific-runtime-libs,
+                 [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 (no/yes/error)]),,
++             [enable_poison_system_directories=no])
++AC_MSG_NOTICE([poisoned directories $enable_poison_system_directories])
++if test "x${enable_poison_system_directories}" != "xno"; then
++  AC_MSG_NOTICE([poisoned directories enabled])
++  AC_DEFINE([ENABLE_POISON_SYSTEM_DIRECTORIES],
++           [1],
++           [Define to warn for use of native system header directories])
++  if test $enable_poison_system_directories = "error"; then
++   AC_MSG_NOTICE([poisoned directories are fatal])
++   AC_DEFINE([POISON_BY_DEFAULT], [1], [Define to make poison warnings errors])
++  fi
++fi
++
+ # Substitute configuration variables
+ AC_SUBST(subdirs)
+ AC_SUBST(srcdir)
+diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
+index ff6c338be..a8ebfa59a 100644
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -379,6 +379,7 @@ Objective-C and Objective-C++ Dialects}.
+ -Wpacked  -Wno-packed-bitfield-compat  -Wpacked-not-aligned  -Wpadded @gol
+ -Wparentheses  -Wno-pedantic-ms-format @gol
+ -Wpointer-arith  -Wno-pointer-compare  -Wno-pointer-to-int-cast @gol
++-Wno-poison-system-directories @gol
+ -Wno-pragmas  -Wno-prio-ctor-dtor  -Wredundant-decls @gol
+ -Wrestrict  -Wno-return-local-addr  -Wreturn-type @gol
+ -Wno-scalar-storage-order  -Wsequence-point @gol
+@@ -8029,6 +8030,14 @@ made up of data only and thus requires no special treatment.  But, 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
+diff --git a/gcc/gcc.cc b/gcc/gcc.cc
+index beefde7f6..4e6557b3c 100644
+--- a/gcc/gcc.cc
++++ b/gcc/gcc.cc
+@@ -1162,6 +1162,8 @@ proper position among the other output files.  */
+    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
+    "%X %{o*} %{e*} %{N} %{n} %{r}\
+     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!r:%{!nostartfiles:%S}}} \
++    %{Wno-poison-system-directories:--no-poison-system-directories} \
++    %{Werror=poison-system-directories:--error-poison-system-directories} \
+     %{static|no-pie|static-pie:} %@{L*} %(mfwrap) %(link_libgcc) " \
+     VTABLE_VERIFICATION_SPEC " " SANITIZER_EARLY_SPEC " %o "" \
+     %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
+@@ -1257,8 +1259,11 @@ static const char *cpp_unique_options =
+ static const char *cpp_options =
+ "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
+  %{f*} %{g*:%{%:debug-level-gt(0):%{g*}\
+- %{!fno-working-directory:-fworking-directory}}} %{O*}\
+- %{undef} %{save-temps*:-fpch-preprocess}";
++ %{!fno-working-directory:-fworking-directory}}} %{O*}"
++#ifdef POISON_BY_DEFAULT
++ " %{!Wno-error=poison-system-directories:-Werror=poison-system-directories}"
++#endif
++ " %{undef} %{save-temps*:-fpch-preprocess}";
+ 
+ /* Pass -d* flags, possibly modifying -dumpdir, -dumpbase et al.
+ 
+@@ -1287,7 +1292,11 @@ static const char *cc1_options =
+  %{coverage:-fprofile-arcs -ftest-coverage}\
+  %{fprofile-arcs|fprofile-generate*|coverage:\
+    %{!fprofile-update=single:\
+-     %{pthread:-fprofile-update=prefer-atomic}}}";
++     %{pthread:-fprofile-update=prefer-atomic}}}"
++#ifdef POISON_BY_DEFAULT
++ " %{!Wno-error=poison-system-directories:-Werror=poison-system-directories}"
++#endif
++  ;
+ 
+ static const char *asm_options =
+ "%{-target-help:%:print-asm-header()} "
+diff --git a/gcc/incpath.cc b/gcc/incpath.cc
+index 622204a38..5ac03c086 100644
+--- a/gcc/incpath.cc
++++ b/gcc/incpath.cc
+@@ -26,6 +26,7 @@
+ #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.  */
+@@ -399,6 +400,26 @@ merge_include_chains (const char *sysroot, cpp_reader *pfile, int verbose)
+        }
+       fprintf (stderr, _("End of search list.\n"));
+     }
++
++#ifdef ENABLE_POISON_SYSTEM_DIRECTORIES
++  if (flag_poison_system_directories)
++    {
++       struct cpp_dir *p;
++
++       for (p = heads[INC_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))
++              || (!strncmp (p->name, "/sw/include", 11))
++              || (!strncmp (p->name, "/opt/include", 12)))
++            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