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#3021 closed defect (wontfix)
libbsd cannot compile with -O0 option
| Reported by: | phongvanpham | Owned by: | |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | network/libbsd | Version: | 5 |
| Severity: | normal | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: |
Description
Currently the symbol swi_remove is #ifdef'ed out in rtems (kern_intr.c). However, there are places that were referencing swi_remove without #ifdef around it. I am new to libbsd and I currently do not have expertise to determine if the actual swi test itself needs to be removed or just ifdef'ed out where swi_remove symbol is referenced or anything in between. Attached is a screenshot showing swi_remove is referenced.
One last note, compiling with -O2 is ok.
Attachments (1)
Change History (6)
Changed on May 18, 2017 at 5:28:15 PM by phongvanpham
| Attachment: | swi_remove_symbol_missing.PNG added |
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comment:1 follow-up: 2 Changed on May 19, 2017 at 7:35:31 AM by Sebastian Huber
comment:2 Changed on May 22, 2017 at 4:41:30 PM by phongvanpham
Replying to Sebastian Huber:
Which BSP did you use? I use -O0 sometimes and it works well.
The issue has to do with a lack of the following additional compiler (and linker) options
-ffunction-sections
-fdata-sections
-Wl,--gc-sections
when compiling with -O0.
Since some of compiler+linker options are partially taken from BSP settings, are you mandating that the above options to be in the BSP in order to use libbsd?
Personally, I don't think it is a good idea. If you need them to compile libbsd, you should explicitly state them in the waf compiling environment (assuming you don't want to fix the swi_remove symbol issue directly) by modifying the libbsd_waf.py (or wherever the input to the tool that autogenerate libbsd_waf.py). In this way, you're removing the dependency from BSP compiling options.
comment:3 follow-up: 4 Changed on May 23, 2017 at 5:57:30 AM by Sebastian Huber
Every BSP should use these options. Yes, its not obvious and setting these options explicitly in every BSP is bad.
comment:4 Changed on May 23, 2017 at 4:41:35 PM by phongvanpham
Replying to Sebastian Huber:
Every BSP should use these options. Yes, its not obvious and setting these options explicitly in every BSP is bad.
From your comment, I couldn't figure out what your plan of action is.
If it is a mandate that every BSP is required to have those compiler/linker options in order to use rtems-libbsd, then this ticket is no longer valid and pls. feel free to close it as "wont fix".
From my end, there is nothing else to do for this ticket.
comment:5 Changed on May 24, 2017 at 5:16:37 AM by Sebastian Huber
| Resolution: | → wontfix |
|---|---|
| Status: | new → closed |
There are some tickets to enable these options on every BSP.
Which BSP did you use? I use -O0 sometimes and it works well.