Red flag alerts & enhancements

See also Issues from previous releases for issues that may be pertinent from versions of GNUPro Toolkit prior to this release.

The following documentation discusses new features and alerts for this release of GNUPro Toolkit.

The malloc routines in the embedded C library have been updated. The library includes a new header file, <malloc.h>, and some useful new functions, including memalign and mallinfo . The malloc routines now always call __malloc_lock and __malloc_unlock to lock and unlock access to the memory pool. The library provides default versions of these functions which do nothing; if you invoke malloc from multiple threads, or reentrantly, you should provide your own versions of these functions. See GNUPro C Library in GNUPro Libraries for more details.
This release contains GNUPro for the Windows environment, specifically, the Windows NT 4.0 (WinNT4.0-sp3) and the Windows 95 environments (Win95-osr2), using the GNUPro cygwin32 tools.

My Documents

cygwin32

gcc

g++

GNUPro Toolkit includes the compiler, egcs 1.0, which is similar to gcc 2.8.x.
There have been further enhancements to the Global Common Sub-Elimination (gcse) routines in the libraries.
There have been improvements to the general induction variable identification and elimination, along with improvements to the loop invariant code motion.
There are now accurate warnings, especially when using exception handling (such as when using uninitialized variables, for example)
There is improved global constant and copy propogation.
There are several new switches: -Os (for optimizing space), -fmove-all-variables (for forcing all invariant computations in loops to be moved outside the loop), -freduce-all-givs (for forcing all general induction variables in loops to be strength reduced), and -frerun-loop-opt (for rerunning loop optimizations twice).
There is now partial redundancy elimination with lazy code motion and critical edge splitting.
There is now global code hoisting and unification.
GNUPro Toolkit fully supports the following functionality for the GNU C++ programming.
Thread-safe exception handling, including nested e ffb xceptions and placement delete. operator new now throws bad_alloc.
Member class templates.
Local classes in templates.
Template parameters.
Template friends.
Protected virtual inheritance.
Loop optimization improvements (with the test at the end in more cases); for class D derived from B, which has a member, int i, &D::i is now of type int B::* instead of int D::*.
Compact name mangling with -fsquangle. Future versions of the compiler may use the new mangling to indicate a different, incompatible ABI. To use this, rebuild the libraries (including libgcc) with this option.
Member function and template support.
Cygnus fully supports the m68k-elf toolchain. An earlier version of m68k-elf that was previously available is obsolete. Migrating to the new m68k-elf toolchain will require rebuilding existing object files and modifying any existing source code written in assembly language. Source code that was written in C will not need to be changed.

m68k-elf

m68k-coff

m68k-aout

The fp register must be referred to instead as the a6 register. link %fp,&0 must be replaced with link %a6,#0 as a modification.
Incidences of the & symbol must be replaced with # . link %fp,&0 must be replaced with link %a6,#0 as a modification.

With this release of GNUPro Toolkit, there is a graphical user interface for the GNU debugger, gdb. Cygnus refers to it as GDBtk, since it uses the Tcl/Tk programming system, and it is the same source for both Unix and Windows environments.

When using a non-ANSI compiler, its code for --disable-gdbtk avoids building the gdb libraries for the GUI, libgui, and automatically turns on --disable-gdbtk. This allows use of such non-ANSI compliant compilers.
CygMON is Cygnus' own ROM monitor, created to standardize use of ROM monitors with GNUPro tools. It is available for MicroSPARC and Matsushita MN10300. CygMON includes the gdb remote stub sub-routine as an integral part of its structure. Completely compatible with gdb, CygMON solves a number of porting and testing problems with many ROM monitors, each with its own protocols.
There is now support for DWARF2 object file format.
Some improvements were made for Solaris thread debugging.
A backend is in place for the Densan TX39 board.

There are two new binary utilities.

At the time of the documentation's completion for the gnupro-98r1 version of distribution, a thorough testing process hadn't finalized for rebuilding. For current documentation, contact your Cygnus sales representative. See also Rebuilding from Source in GNUPro Advanced Topics.

Red flag alerts & enhancements

General issues

Compiler issues

Debugger issues

Utilities issues

Rebuilding issues