[FFmpeg-devel] [PATCH v3] ffbuild: read library linker objects from a file

[Gyan Doshi]

On 2025-03-17 05:29 pm, Zhao Zhili wrote:
>
>> On Mar 17, 2025, at 19:45, Gyan Doshi <ffmpeg at gyani.pro> wrote:
>>
>>
>>
>> On 2025-03-17 05:02 pm, Zhao Zhili wrote:
>>>> On Mar 13, 2025, at 21:02, Gyan Doshi <ffmpeg at gyani.pro> wrote:
>>>>
>>>> The linker command can exceed the maximum argument limit on MinGW,
>>>> especially for libavcodec.
>>>>
>>>> The objects list is now stored in a file and passed to the linker.
>>>> ---
>>>> v3:
>>>>   for reasons unknown to me, static linking doesn't appear to
>>>>   work on linux with escaped variables, so removed those.
>>>>   Someone please test on linux both static and shared builds.
>>>>
>>>> .gitignore          | 1 +
>>>> ffbuild/common.mak  | 2 +-
>>>> ffbuild/library.mak | 8 ++++++--
>>>> 3 files changed, 8 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/.gitignore b/.gitignore
>>>> index 9cfc78b414..430abaf91b 100644
>>>> --- a/.gitignore
>>>> +++ b/.gitignore
>>>> @@ -1,5 +1,6 @@
>>>> *.a
>>>> *.o
>>>> +*.objs
>>>> *.o.*
>>>> *.d
>>>> *.def
>>>> diff --git a/ffbuild/common.mak b/ffbuild/common.mak
>>>> index 023adb8567..ca45a0f368 100644
>>>> --- a/ffbuild/common.mak
>>>> +++ b/ffbuild/common.mak
>>>> @@ -214,7 +214,7 @@ $(TOOLOBJS): | tools
>>>>
>>>> OUTDIRS := $(OUTDIRS) $(dir $(OBJS) $(HOBJS) $(HOSTOBJS) $(SLIBOBJS) $(SHLIBOBJS) $(STLIBOBJS) $(TESTOBJS))
>>>>
>>>> -CLEANSUFFIXES     = *.d *.gcda *.gcno *.h.c *.ho *.map *.o *.pc *.ptx *.ptx.gz *.ptx.c *.ver *.version *$(DEFAULT_X86ASMD).asm *~ *.ilk *.pdb
>>>> +CLEANSUFFIXES     = *.d *.gcda *.gcno *.h.c *.ho *.map *.o *.objs *.pc *.ptx *.ptx.gz *.ptx.c *.ver *.version *$(DEFAULT_X86ASMD).asm *~ *.ilk *.pdb
>>>> LIBSUFFIXES       = *.a *.lib *.so *.so.* *.dylib *.dll *.def *.dll.a
>>>>
>>>> define RULES
>>>> diff --git a/ffbuild/library.mak b/ffbuild/library.mak
>>>> index 793e9d41fa..72e3872157 100644
>>>> --- a/ffbuild/library.mak
>>>> +++ b/ffbuild/library.mak
>>>> @@ -35,8 +35,10 @@ OBJS += $(SHLIBOBJS)
>>>> endif
>>>> $(SUBDIR)$(LIBNAME): $(OBJS) $(STLIBOBJS)
>>>> 	$(RM) $@
>>>> -	$(AR) $(ARFLAGS) $(AR_O) $^
>>>> +	$(Q)echo $^ > $@.objs
>>>> +	$(AR) $(ARFLAGS) $(AR_O) @$@.objs
>>> @file doesn’t supported by ar on macOS or BSD.
>> Do we have any FATE clients on these platforms?
> I remember there were apple machines, but they are not there now.
>
> https://fate.ffmpeg.org/

Can we get a definite list of archiver/linkers which we support that 
don't support response files?

Regards,
Gyan


>
> Can we add CI machine and workflow to code.ffmpeg.org <http://code.ffmpeg.org/> now?
>
>> I guess we can use  some guard (which?) to define an alternate recipe.
>>
>> Regards,
>> Gyan
>>
>>
>>>> 	$(RANLIB) $@
>>>> +	-$(RM) $@.objs
>>>>
>>>> install-headers: install-lib$(NAME)-headers install-lib$(NAME)-pkgconfig
>>>>
>>>> @@ -66,8 +68,10 @@ $(SUBDIR)$(SLIBNAME): $(SUBDIR)$(SLIBNAME_WITH_MAJOR)
>>>>
>>>> $(SUBDIR)$(SLIBNAME_WITH_MAJOR): $(OBJS) $(SHLIBOBJS) $(SLIBOBJS) $(SUBDIR)lib$(NAME).ver
>>>> 	$(SLIB_CREATE_DEF_CMD)
>>>> -	$$(LD) $(SHFLAGS) $(LDFLAGS) $(LDSOFLAGS) $$(LD_O) $$(filter %.o,$$^) $(FFEXTRALIBS)
>>>> +	$(Q)echo $$(filter %.o,$$^) > $$@.objs
>>>> +	$$(LD) $(SHFLAGS) $(LDFLAGS) $(LDSOFLAGS) $$(LD_O) @$$@.objs $(FFEXTRALIBS)
>>>> 	$(SLIB_EXTRA_CMD)
>>>> +	-$(RM) $$@.objs
>>>>
>>>> ifdef SUBDIR
>>>> $(SUBDIR)$(SLIBNAME_WITH_MAJOR): $(DEP_LIBS)
>>>> -- 
>>>> 2.46.1
>>>>
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