From: Jeff Law Date: Wed, 3 Dec 1997 05:39:11 +0000 (-0700) Subject: Update from Jason. X-Git-Tag: releases/egcs-1.0.0~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f76b2e45a6651064bb533b617031a9fe92af51b;p=thirdparty%2Fgcc.git Update from Jason. From-SVN: r16900 --- diff --git a/gcc/cp/NEWS b/gcc/cp/NEWS index ff2d5124f527..7548830396d7 100644 --- a/gcc/cp/NEWS +++ b/gcc/cp/NEWS @@ -1,7 +1,7 @@ *** Changes since G++ version 2.7.2: -* A public review copy of the December 1996 Draft of the ANSI/ISO C++ - proto-standard is now available. See +* A public review copy of the December 1996 Draft of the ISO/ANSI C++ + standard is now available. See http://www.cygnus.com/misc/wp/ @@ -65,8 +65,17 @@ + Template friends. * Exception handling support has been significantly improved and is on by - default. This can result in significant runtime overhead. You can turn - it off with -fno-exceptions. + default. The compiler supports two mechanisms for walking back up the + call stack; one relies on static information about how registers are + saved, and causes no runtime overhead for code that does not throw + exceptions. The other mechanism uses setjmp and longjmp equivalents, and + can result in quite a bit of runtime overhead. You can determine which + mechanism is the default for your target by compiling a testcase that + uses exceptions and doing an 'nm' on the object file; if it uses __throw, + it's using the first mechanism. If it uses __sjthrow, it's using the + second. + + You can turn EH support off with -fno-exceptions. * RTTI support has been rewritten to work properly and is now on by default. This means code that uses virtual functions will have a modest space @@ -90,9 +99,9 @@ * New flags: - + New flags -Wsign-promo (warn about potentially confusing promotions - in overload resolution), -Wno-pmf-conversion (don't warn about - converting from a bound member function pointer to function pointer). + + New warning -Wno-pmf-conversion (don't warn about + converting from a bound member function pointer to function + pointer). + A flag -Weffc++ has been added for violations of some of the style guidelines in Scott Meyers' _Effective C++_ books. @@ -145,7 +154,7 @@ * The name of a class is now implicitly declared in its own scope; A::A refers to A. -* Local classes are now supported. +* Local classes are now supported, though not inside templates. * __attribute__ can now be attached to types as well as declarations.