[Ohrrpgce] SVN: teeemcee/10025 scons: Reduce game/custom.exe size by 1MB by compiling with --gc-section

[James Paige]

Okay, that is fine by me. Shall we push it out 1 month?

On Tuesday, February 20, 2018, Ralph Versteegen <teeemcee at gmail.com> wrote:

> Actually, I wanted to talk about that. I think we should delay Fufluns a
> bit. Nightlies are still in a state in which I'm actively advising people
> not to use them, and I received report of, or discovered myself, at least 8
> bugs just yesterday!  And I still have several feature branches to merge.
>
> On 21 February 2018 at 03:18, James Paige <Bob at hamsterrepublic.com> wrote:
>
>> Broken builds, and today is the day to start Fufluns stabilization. That
>> seems about right ;)
>>
>>
>> On Tuesday, February 20, 2018, Ralph Versteegen <teeemcee at gmail.com>
>> wrote:
>>
>>> It doesn't entirely work on Windows either :(
>>> After these changes, the size of custom.exe in the nightly builds only
>>> reduced from 4.9MB to 4.4MB (mingw, gcc 5.3). But on my machine I get 3.2MB
>>> (with mxe/mingw-w64, gcc 5.4) or 3.3MB (with mingw on windows, gcc 4.8.1).
>>> gcc on the nightly build machine simply isn't stripping out the dead code
>>> it should be - there's still an extra half a megabyte of libstdc++ in there
>>> (most of it seems to be code for locale-dependent punctuation, especially
>>> of currency!) Not counting all the symbols for that dead code. That still
>>> doesn't add up to the whole discrepancy, though.
>>>
>>> Can't ssh to my mac right now, but I'll fix it blind. And I see I broke
>>> android too. That's three different platform builds broken (including
>>> Windows yesterday), in different ways!
>>>
>>> On 21 February 2018 at 02:00, James Paige <Bob at hamsterrepublic.com>
>>> wrote:
>>>
>>>> Looks like this doesn't work on Mac:
>>>>
>>>>
>>>> ld: unknown option: --gc-sections
>>>> clang: error: linker command failed with exit code 1 (use -v to see
>>>> invocation)
>>>>
>>>>
>>>> On Sunday, February 18, 2018, <subversion at hamsterrepublic.com> wrote:
>>>>
>>>>> teeemcee
>>>>> 2018-02-18 23:58:20 -0800 (Sun, 18 Feb 2018)
>>>>> 452
>>>>> scons: Reduce game/custom.exe size by 1MB by compiling with
>>>>> --gc-sections
>>>>>
>>>>> Measured on a gengcc=1 debug=0 build with MXE (mingw-w64).
>>>>> Mainly, this cuts out most of libstdc++, which we statically link. So
>>>>> the effect
>>>>> isn't dramatic on other platforms.
>>>>>
>>>>> I now measure game.exe as 3MB and custom.exe as 3.5MB. Of that, 600KB
>>>>> is
>>>>> symbol information, unfortunately a large amount of that is from
>>>>> libstdc++,
>>>>> because ld doesn't delete symbols for GC'd sections.
>>>>> ---
>>>>> U   wip/SConscript
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>>>>>
>>>>
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