GNUH8 v0603 is based on gcc-4.2-20060812, binutils-2.17, newlib-1.14.0 and gdb-6.5 (released).

The latest patches have been applied to gcc, binutils and newlib.

'Static Analysis' feature has been added in GNUH8 compiler to perform extra build time checks on user C-source code upon passing a command line switch. The compiler advises programmer to improve upon the code efficiency

Selection of optimization options in HEW is simplified to provide more efficient options for speed and code size optimization.

H8/300L, 

H8/300H,

H8/300H Tiny Series,

'Static Analysis' feature has been added in GNUH8 compiler to perform extra build time checks on user C-source code upon passing a command line switch "-Wanalyze". The compiler advises the programmer to improve upon the code so as to generate more efficient and reliable code. Static analysis feature can be invoked on command prompt using option '-Wanalyze'. This option will analyze application code for different set of rules and prompt warnings. These warnings will be prompted against violation of rules. You can specifically enable warning for a particular rule using command line option '-Wanalyze-rule='. Also, warning for aparticular rule can be disabled using command line option '-Wno-analyze-rule='.
However, this option should be preceded by '-Wanalyze' option. For more information on the same, please refer to the GCC user manual.
E.g:
* If you want to analyze code for all rules, then use '-Wanalyze' option.
* If you want to analyze code for only rule 1, then use '-Wanalyze-rule=1' option.
* If you want to analyze code for all rules except rule 1, then use  '-Wanalyze' option followed by '-Wno-analyze-rule=1' option.

Support for 'bset' instruction has been added in GNUH8 compiler.

While using optimized libraries, use of 'Ctype Library Function' in C source file (with #include <ctype.h>), used to give error "undefined reference to `___ctype_ptr' ".

This has been fixed.

Selection of optimization options in HEW is simplified to provide more efficient options for speed and code size optimization.

Support for 'Static Analysis' feature has been added in HEW.

HEW used to crash if user goes to 'Build->Compiler' (before doing any other operation in HEW) after opening a new/existing project in HEW.
This bug has been fixed.

HEW dependency scanner used to display errors for scanning of dependencies for C++ files when included file do not have any extension.
This bug has been fixed.

'Warning Options' and 'Other Compiler Options' were not getting included while generating makefile for any reopened project.
This bug has been fixed.

In order to enable the debugging of user applications on target using HMON in HEW 4.x environment, RSK support is required. Please refer to the following FAQ link for more information,
http://www.kpitgnutools.com/phpmyfaq/index.php?sid=28137&aktion=
artikel&rubrik=003003&id=341&lang=en

Assembler gives error while building the following code with
optimization enabled,

unsigned long x[4];

void foo(void)
{
((void (*)())(x+2))();
}.

Following code if compiled for H8300H, H8300HN, H8S, H8300SN, H8SX, H8SXN targets with optimization option -O1 and above, generates wrong assembly code.

unsigned int ReadWordx86Style(unsigned long lAddr)
{
unsigned char baBuff[2];
baBuff[0x00]=*((unsigned char *)((unsigned int)(lAddr+1)));
baBuff[0x01]=*((unsigned char *)((unsigned int)(lAddr+0)));
return((*(unsigned int *)baBuff));
}

int start(void)
{
unsigned char baBuff[256];
unsigned int wResult;
wResult = ReadWordx86Style((unsigned long)((unsigned int)baBuff));
return(wResult);
}.

The '.tinybss' implementation does not work as expected.

h8300-elf-as does not give error if attribute of a section is not specified.

If '.data' section is empty, the '.bss' section follows '.rodata' section instead of following the '.data' section. Due to this, all un-initialized variables are placed in ROM area. However, this can be avoided by modifying the linker script for '.bss' to follow '.data' section by using '_edata' label OR just by declaring a dummy initialized variable that will be placed in '.data'.

1.

While debugging applications in HEW, Stack trace information is not available.

In HEW, on using the optimized libraries with C++ project, the linker generates error of "undefined references" to some routines while building the project, as some of the ANSI C library functions are not implemented in H8 optimized libraries.

Workaround:
User can add own implementation of these functions or can provide with dummy implementations depending upon the use.