Re: [patch] fix collect2 not to drag every object with eh tables on aix

[Olivier Hainque <hainque at adacore dot com>]

Olivier Hainque wrote:
> This is a recap and resubmission of a patch suggested a while ago

 I managed to truncate the attachement in the previous message.
 Here it is again.

 Thanks in advance,

 Olivier
 
> 2009-07-06  Olivier Hainque  <hainque@adacore.com>
> 
> 	* collect2.c (DO_COLLECT_EXPORT_LIST): New internal macro,
> 	always defined.  Reflect definition or absence of such for
> 	COLLECT_EXPORT_LIST.  Readability helper.
> 	(scanfilter): New enum, to help control what symbols
> 	are to be considered or ignored by scan_prog_file.
> 	(enum pass): Rename as "scanpass", moved together with scanfilter
> 	prior to scan_prog_file's prototype.
> 	(scan_prog_file): Accept and honor scanpass and scanfilter arguments.
> 	Group prototype with the scanpass/scanfilter definitions, factorize
> 	head comments for the several implementations at the prototype.
> 	(main): Reorganize the first pass link control to let AIX
> 	drag only the needed frame tables in executables.  Prevent
> 	frame tables collection during the scan aimed at static ctors.
>  	Pre-link and scan for frame tables later to compensate.
> 	* doc/tm.texi (ASM_OUTPUT_DWARF_TABLE_REF): New macro.
> 	A C statement to issue assembly directives that create a reference
> 	to the given DWARF table identifier label from the current function
> 	section.
> 	* dwarf2out.c (switch_to_eh_frame_section): Add a BACK argument
> 	to differentiate first time section entry.  Only emit a .data
> 	tables start identifier label the first time around.
> 	(switch_to_frame_table_section): New function.  Helper for
> 	output_call_frame_info to switch possibly BACK into the eh_frame
> 	or the debug_frame section depending on FOR_EH.
> 	(output_call_frame_info): Use helper to first enter the proper
> 	frame section. Use ASM_OUTPUT_DWARF_TABLE_REF when defined to
> 	emit a link to the frame table start label from each function
> 	section.
> 	* config/rs6000/rs6000.c (rs6000_aix_asm_output_dwarf_table_ref):
> 	New function.  Implementation of ASM_OUTPUT_DWARF_TABLE_REF.
> 	* config/rs6000/rs6000-protos.h: Declare it.
> 	* config/rs6000/aix.h (ASM_OUTPUT_DWARF_TABLE_REF): Define.

Attachment: collect-tables.dif
Description: Text document