X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fconfig.gcc;h=e9d46c1a027da44c8241b6c0731032af221df456;hb=300b0e0817a85c8c855f265eeb6e7bdea3160645;hp=9aea7ced157fc88767017d907807125b268eb709;hpb=7a1e3d60ec9bc3c379a6e4d89c86c8ff927f1e37;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 9aea7ced157..e9d46c1a027 100644
--- 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
 				;;
 			*)