[build2] [build2 0.7-a.0] How to use start-group / end-group in config.c.loptions

[Mueller Tobias (DC-MH/EMF1)]

Hi,

Is there a way to use -Wl,--start-group $(objects) $(libraries) -Wl,--end-group in config.cc.loptions?

After compiling the objects the following steps need to be done to get a HEX file:
1. Link relative
2. Redirect global variable references
3. Link absolute
4. HEX generation

The "link relative" step is done by build2 however the order of the objects and libraries seems to be different than expected for the second step if "-Wl,--start-group %OBJECTFILES% %LIBRARIES% -Wl,--end-group" would be used.

Current build2 setting for config.cc.loptions= -mcpu=MCU_JDP_UC1 -mfixed-sda -Wl,-r -nostdlib -Wl,--cref -Wl,-no-demangle,-demangle=none -Wl,--extmap=a -ferror-numbers -Wl,-T -Wl,rel_linker_cmd.lcf -Wl,-Map -Wl,_bin/relocatable.map -Wl,--mcpu=z425Bn3 -lspfpmath -lgcc

Here the complete commands (from a Windows batch file) including all arguments:
1. ppc-vle-gcc -mcpu=MCU_JDP_UC1 -mfixed-sda -Wl,-r -nostdlib -Wl,--cref -Wl,-no-demangle,-demangle=none -Wl,--extmap=a -ferror-numbers -Wl,-T -Wl,rel_linker_cmd.lcf -Wl,--start-group %OBJECTFILES% %LIBRARIES% -Wl,--end-group -Wl,-Map -Wl,%OUTPUT_PATH%/relocatable.map -Wl,--mcpu=z425Bn3 -lspfpmath -lgcc -o %OUTPUT_PATH%/relocatable.elf
2. ppc-vle-vared -w -l -efull -i %OUTPUT_PATH%\relocatable.elf -c mcop_adaptrefs.txt -o %OUTPUT_PATH%\reloc_vared.elf
3. ppc-vle-gcc -mcpu=MCU_JDP_UC1 -mfixed-sda -nostdlib -Wl,--cref -Wl,-no-demangle,-demangle=none -Wl,--warn-once -Wl,--extmap=a -Wl,--warn-section-align -Wl,--warn-orphan -ferror-numbers -Wl,-T -Wl,prj_linker_cmd.lcf -Wl,-Map -Wl,%OUTPUT_PATH%\%MODULE_NAME%.map -Wl,--mcpu=z425Bn3 %OUTPUT_PATH%\reloc_vared.elf -o %OUTPUT_PATH%\%MODULE_NAME%.elf

Best regards
Tobias