* struct-equiv.c (rtx_equiv_p): Fix POST_MODIFY case.

[pf3gnuchains/gcc-fork.git] / gcc / config.gcc

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 9aea7ce..e9d46c1 100644 (file)
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -34,9 +34,14 @@
 #                      threads support was requested.
 #
 #  default_use_cxa_atexit
-#                      "no" by default, can be set to "yes" if a target
-#                      wishes to use __cxa_atexit() by default if the
-#                      $enable___cxa_atexit variable is not set.
+#                        The default value for the $enable___cxa_atexit
+#                      variable.  enable___cxa_atexit needs to be set to
+#                      "yes" for the correct operation of C++ destructors
+#                      but it relies upon the presence of a non-standard C
+#                      library function called __cxa_atexit.
+#                        Since not all C libraries provide __cxa_atexit the
+#                      default value of $default_use_cxa_atexit is set to
+#                      "no" except for targets which are known to be OK.
 #
 #  gas_flag            Either yes or no depending on whether GNU as was
 #                      requested.
@@ -461,6 +466,8 @@ case ${target} in
       tm_defines="${tm_defines} UCLIBC_DEFAULT=0"
       ;;
   esac
+  # Assume that glibc or uClibc are being used and so __cxa_atexit is provided.
+  default_use_cxa_atexit=yes
   ;;
 *-*-gnu*)
   # On the Hurd, the setup is just about the same on
@@ -482,6 +489,8 @@ case ${target} in
       tm_file="${cpu_type}/${cpu_type}.h i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h i386/linux.h gnu.h ${tm_file}"
       ;;
   esac
+  # Assume that glibc is being used and so __cxa_atexit is provided.
+  default_use_cxa_atexit=yes
   ;;
 *-*-netbsd*)
   tmake_file="t-slibgcc-elf-ver t-libc-ok t-netbsd t-libgcc-pic"
@@ -551,6 +560,10 @@ case ${target} in
     *) echo 'Unknown thread configuration for VxWorks'; exit 1 ;;
   esac
   ;;
+*-*-elf)
+  # Assume that newlib is being used and so __cxa_atexit is provided.
+  default_use_cxa_atexit=yes
+  ;;
 esac
 
 case ${target} in
@@ -1060,7 +1073,7 @@ i[34567]86-*-linux* | i[34567]86-*-kfreebsd*-gnu | i[34567]86-*-knetbsd*-gnu)
        i[34567]86-*-knetbsd*-gnu) tm_file="${tm_file} knetbsd-gnu.h i386/knetbsd-gnu.h" ;;
        i[34567]86-*-kfreebsd*-gnu) tm_file="${tm_file} kfreebsd-gnu.h i386/kfreebsd-gnu.h" ;;
        esac
-       tmake_file="${tmake_file} i386/t-crtstuff i386/t-crtfm"
+       tmake_file="${tmake_file} i386/t-crtstuff i386/t-crtfm t-dfprules"
        ;;
 x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
        tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h svr4.h linux.h \
@@ -1069,7 +1082,7 @@ x86_64-*-linux* | x86_64-*-kfreebsd*-gnu | x86_64-*-knetbsd*-gnu)
        x86_64-*-kfreebsd*-gnu) tm_file="${tm_file} kfreebsd-gnu.h" ;;
        x86_64-*-knetbsd*-gnu) tm_file="${tm_file} knetbsd-gnu.h" ;;
        esac
-       tmake_file="${tmake_file} i386/t-linux64 i386/t-crtfm"
+       tmake_file="${tmake_file} i386/t-linux64 i386/t-crtfm t-dfprules"
        ;;
 i[34567]86-*-gnu*)
        ;;
@@ -2817,7 +2830,7 @@ case "${target}" in
                        "" | sparc | sparcv9 | sparc64 | sparc86x \
                        | v7 | cypress | v8 | supersparc | sparclite | f930 \
                        | f934 | hypersparc | sparclite86x | sparclet | tsc701 \
-                       | v9 | ultrasparc | ultrasparc3)
+                       | v9 | ultrasparc | ultrasparc3 | niagara)
                                # OK
                                ;;
                        *)