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From 87a5ace658f2294b025e0420ef03ade1f45d926c Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 8 May 2020 06:11:05 -0700
Subject: [PATCH] Enable CET in cross compiler if possible
Don't perform CET run-time check for host when cross compiling. Instead,
enable CET in cross compiler if possible so that it will run on both CET
and non-CET hosts.
config/
PR bootstrap/94998
* cet.m4 (GCC_CET_HOST_FLAGS): Enable CET in cross compiler if
possible.
libiberty/
PR bootstrap/94998
* configure: Regenerated.
lto-plugin/
PR bootstrap/94998
* configure: Regenerated.
Upstream-Status: Submitted [https://patchwork.ozlabs.org/project/gcc/patch/20200508131105.170077-1-hjl.tools@gmail.com/]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
config/cet.m4 | 18 ++++++++++++------
libiberty/configure | 12 +++++++++---
lto-plugin/configure | 16 +++++++++++-----
3 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/config/cet.m4 b/config/cet.m4
index ea616b728a9..d9608699cd5 100644
--- a/config/cet.m4
+++ b/config/cet.m4
@@ -111,7 +111,8 @@ if test x$may_have_cet = xyes; then
fi
if test x$may_have_cet = xyes; then
- AC_TRY_RUN([
+ if test x$cross_compiling = xno; then
+ AC_TRY_RUN([
static void
foo (void)
{
@@ -137,12 +138,17 @@ main ()
bar ();
return 0;
}
- ],
- [have_cet=no],
- [have_cet=yes])
- if test x$enable_cet = xno -a x$have_cet = xyes; then
- AC_MSG_ERROR([Intel CET must be enabled on Intel CET enabled host])
+ ],
+ [have_cet=no],
+ [have_cet=yes])
+ if test x$enable_cet = xno -a x$have_cet = xyes; then
+ AC_MSG_ERROR([Intel CET must be enabled on Intel CET enabled host])
+ fi
fi
+else
+ # Enable CET in cross compiler if possible so that it will run on both
+ # CET and non-CET hosts.
+ have_cet=yes
fi
if test x$enable_cet = xyes; then
$1="-fcf-protection"
diff --git a/libiberty/configure b/libiberty/configure
index bb76cf1b823..3f82c5bb865 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5375,7 +5375,8 @@ rm -f core conftest.err conftest.$ac_objext \
fi
if test x$may_have_cet = xyes; then
- if test "$cross_compiling" = yes; then :
+ if test x$cross_compiling = xno; then
+ if test "$cross_compiling" = yes; then :
{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error $? "cannot run test program while cross compiling
@@ -5420,9 +5421,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext
fi
- if test x$enable_cet = xno -a x$have_cet = xyes; then
- as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+ if test x$enable_cet = xno -a x$have_cet = xyes; then
+ as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+ fi
fi
+else
+ # Enable CET in cross compiler if possible so that it will run on both
+ # CET and non-CET hosts.
+ have_cet=yes
fi
if test x$enable_cet = xyes; then
CET_HOST_FLAGS="-fcf-protection"
diff --git a/lto-plugin/configure b/lto-plugin/configure
index 1baf6cc70b8..36c6ecc5875 100755
--- a/lto-plugin/configure
+++ b/lto-plugin/configure
@@ -5768,7 +5768,8 @@ rm -f core conftest.err conftest.$ac_objext \
fi
if test x$may_have_cet = xyes; then
- if test "$cross_compiling" = yes; then :
+ if test x$cross_compiling = xno; then
+ if test "$cross_compiling" = yes; then :
{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error $? "cannot run test program while cross compiling
@@ -5813,9 +5814,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext
fi
- if test x$enable_cet = xno -a x$have_cet = xyes; then
- as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+ if test x$enable_cet = xno -a x$have_cet = xyes; then
+ as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+ fi
fi
+else
+ # Enable CET in cross compiler if possible so that it will run on both
+ # CET and non-CET hosts.
+ have_cet=yes
fi
if test x$enable_cet = xyes; then
CET_HOST_FLAGS="-fcf-protection"
@@ -11941,7 +11947,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11944 "configure"
+#line 11950 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -12047,7 +12053,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12050 "configure"
+#line 12056 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
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