Merge branch 'master' into gfortran-testdevel/gfortran-test

1 files changed, 39 insertions, 44 deletions

diff --git a/gcc/configure b/gcc/configure
index bacdd29..5a779db0 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -872,7 +872,6 @@ c_strict_warn
 strict_warn
 c_loose_warn
 loose_warn
-aliasing_flags
 CPP
 EGREP
 GREP
@@ -7126,45 +7125,6 @@ $as_echo "#define HAVE_SWAP_IN_UTILITY 1" >>confdefs.h
 
 fi
 
-# Check whether compiler is affected by placement new aliasing bug (PR 29286).
-# If the host compiler is affected by the bug, and we build with optimization
-# enabled (which happens e.g. when cross-compiling), the pool allocator may
-# get miscompiled.  Use -fno-strict-aliasing to work around this problem.
-# Since there is no reliable feature check for the presence of this bug,
-# we simply use a GCC version number check.  (This should never trigger for
-# stages 2 or 3 of a native bootstrap.)
-aliasing_flags=
-if test "$GCC" = yes; then
-  saved_CXXFLAGS="$CXXFLAGS"
-
-  # The following test compilation will succeed if and only if $CXX accepts
-  # -fno-strict-aliasing *and* is older than GCC 4.3.
-  CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CXX is affected by placement new aliasing bug" >&5
-$as_echo_n "checking whether $CXX is affected by placement new aliasing bug... " >&6; }
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
-#error compiler not affected by placement new aliasing bug
-#endif
-
-_ACEOF
-if ac_fn_cxx_try_compile "$LINENO"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }; aliasing_flags='-fno-strict-aliasing'
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-  CXXFLAGS="$saved_CXXFLAGS"
-fi
-
-
-
-
 # ---------------------
 # Warnings and checking
 # ---------------------
@@ -11308,6 +11268,7 @@ fi
 
 
 
+
     use_additional=yes
 
   acl_save_prefix="$prefix"
@@ -14236,6 +14197,7 @@ $as_echo "$LIBICONV" >&6; }
 
 
 
+
     use_additional=yes
 
   acl_save_prefix="$prefix"
@@ -21522,7 +21484,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 21525 "configure"
+#line 21487 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -21628,7 +21590,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 21631 "configure"
+#line 21593 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -25676,6 +25638,9 @@ else
   powerpc*-*-darwin*)
         gcc_cv_as_flags="-arch ppc"
     ;;
+  amdgcn*)
+            gcc_cv_as_flags="--filetype=obj -triple=amdgcn--amdhsa"
+    ;;
   *)
     gcc_cv_as_flags=" "
     ;;
@@ -26538,8 +26503,8 @@ fi
 esac
 
 # Check if we have .[us]leb128, and support symbol arithmetic with it.
-# Older versions of GAS and some non-GNU assemblers, have a bugs handling
-# these directives, even when they appear to accept them.
+# Older versions of GAS and some non-GNU assemblers have bugs in handling
+# of these directives, even when they appear to accept them.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for .sleb128 and .uleb128" >&5
 $as_echo_n "checking assembler for .sleb128 and .uleb128... " >&6; }
 if ${gcc_cv_as_leb128+:} false; then :
@@ -26573,6 +26538,11 @@ elif test "x$gcc_cv_otool" != x; then
      | grep '04 80 0a 8e 78 80 80 80 80 80 80 80 80 80 01' >/dev/null; then
     gcc_cv_as_leb128=yes
   fi
+elif test "x$gcc_cv_readelf" != x; then
+  if $gcc_cv_readelf -x .data conftest.o 2>/dev/null \
+     | grep '04800a8e 78808080 80808080 808001' >/dev/null; then
+    gcc_cv_as_leb128=yes
+  fi
 else
   # play safe, assume the assembler is broken.
   :
@@ -26669,6 +26639,12 @@ else
       esac
     fi
     ;;
+  x86_64-*-darwin* | i?86-*-darwin* | powerpc*-darwin-*)
+    # Darwin has assemblers that support .cfi_ instructions, but that then
+    # triggers emission of compact unwind which has incompatibilities with
+    # current GCC output.
+    gcc_cv_as_cfi_directive=no
+    ;;
   *-*-*)
     gcc_cv_as_cfi_directive=yes
     ;;
@@ -32760,6 +32736,7 @@ if test x"$ld64_flag" = x"yes"; then
   gcc_cv_ld64_platform_version=0
   gcc_cv_ld64_macos_version_min=0
   gcc_cv_ld64_demangle=0
+  gcc_cv_ld64_no_deduplicate=0
 
   if test "$build" = "$host"; then
     darwin_try_test=1
@@ -32789,6 +32766,9 @@ $as_echo "$gcc_cv_ld64_major" >&6; }
     if test "$gcc_cv_ld64_major" -ge 236; then
       gcc_cv_ld64_export_dynamic=1
     fi
+    if test "$gcc_cv_ld64_major" -ge 262; then
+      gcc_cv_ld64_no_deduplicate=1
+    fi
     if test "$gcc_cv_ld64_major" -ge 512; then
       gcc_cv_ld64_platform_version=1
       gcc_cv_ld64_macos_version_min=1
@@ -32823,6 +32803,15 @@ $as_echo_n "checking linker for -export_dynamic support... " >&6; }
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_ld64_export_dynamic" >&5
 $as_echo "$gcc_cv_ld64_export_dynamic" >&6; }
 
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker for -no_deduplicate support" >&5
+$as_echo_n "checking linker for -no_deduplicate support... " >&6; }
+    gcc_cv_ld64_no_deduplicate=1
+    if $gcc_cv_ld -no_deduplicate < /dev/null 2>&1 | grep 'unknown option' > /dev/null; then
+      gcc_cv_ld64_no_deduplicate=0
+    fi
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_ld64_no_deduplicate" >&5
+$as_echo "$gcc_cv_ld64_no_deduplicate" >&6; }
+
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker for -platform_version support" >&5
 $as_echo_n "checking linker for -platform_version support... " >&6; }
     gcc_cv_ld64_platform_version=1
@@ -32864,6 +32853,12 @@ _ACEOF
 
 
 cat >>confdefs.h <<_ACEOF
+#define LD64_HAS_NO_DEDUPLICATE $gcc_cv_ld64_no_deduplicate
+_ACEOF
+
+
+
+cat >>confdefs.h <<_ACEOF
 #define LD64_HAS_PLATFORM_VERSION $gcc_cv_ld64_platform_version
 _ACEOF