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

[James Paige]

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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