[FFmpeg-devel] configure doesn't seem to use pkg-config flags?
Timo Rothenpieler
timo at rothenpieler.org
Wed Jan 31 15:47:44 EET 2024
On 31/01/2024 14:07, epirat07 at gmail.com wrote:
>
>
> On 31 Jan 2024, at 13:03, Timo Rothenpieler wrote:
>
>> On 31/01/2024 05:31, Roger Pack wrote:
>>> On Thu, Jan 18, 2024 at 6:31 AM Timo Rothenpieler <timo at rothenpieler.org> wrote:
>>>>
>>>>
>>>>
>>>> On 18/01/2024 04:38, Roger Pack wrote:
>>>>> Hello.
>>>>> After compiling libx265 as a "static library" (mingw cross compiling
>>>>> targeting win64)
>>>>>
>>>>> $ pkg-config --libs --static x265
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -lgcc
>>>>>
>>>>> I get this failure at configure time:
>>>>>
>>>>> ./configure --enable-libx265 --arch=x86_64 --target-os=mingw32
>>>>> --cross-prefix=x86_64-w64-mingw32- --pkg-config=pkg-config
>>>>> --pkg-config-flags=--static
>>>>>
>>>>> ERROR: x265 not found using pkg-config
>>>>>
>>>>> config.log (sorry it's verbose, first compile passes, second one fails linking)
>>>>>
>>>>> ...
>>>>> require_pkg_config libx265 x265 x265.h x265_api_get
>>>>> check_pkg_config libx265 x265 x265.h x265_api_get
>>>>> test_pkg_config libx265 x265 x265.h x265_api_get
>>>>> pkg-config --exists --print-errors x265
>>>>> check_func_headers x265.h x265_api_get
>>>>> -I/home/rdp/new/sandbox/win64_static/build_files/include
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -lgcc
>>>>> test_ld cc -I/home/rdp/new/sandbox/win64_static/build_files/include
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -lgcc
>>>>> test_cc -I/home/rdp/new/sandbox/win64_static/build_files/include
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a
>>>>> BEGIN /tmp/ffconf.L9GhKESq/test.c
>>>>> 1 #include <x265.h>
>>>>> 2 #include <stdint.h>
>>>>> 3 long check_x265_api_get(void) { return (long) x265_api_get; }
>>>>> 4 int main(void) { int ret = 0;
>>>>> 5 ret |= ((intptr_t)check_x265_api_get) & 0xFFFF;
>>>>> 6 return ret; }
>>>>> END /tmp/ffconf.L9GhKESq/test.c
>>>>> x86_64-w64-mingw32-gcc -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64
>>>>> -D_LARGEFILE_SOURCE -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
>>>>> -D__printf__=__gnu_printf__ -D_WIN32_WINNT=0x0600
>>>>> -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -std=c11
>>>>> -fomit-frame-pointer
>>>>> -I/home/rdp/new/sandbox/win64_static/build_files/include
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -c -o
>>>>> /tmp/ffconf.L9GhKESq/test.o /tmp/ffconf.L9GhKESq/test.c
>>>>> /tmp/ffconf.L9GhKESq/test.c: In function 'check_x265_api_get':
>>>>> /tmp/ffconf.L9GhKESq/test.c:3:40: warning: cast from pointer to
>>>>> integer of different size [-Wpointer-to-int-cast]
>>>>> 3 | long check_x265_api_get(void) { return (long) x265_api_get; }
>>>>> | ^
>>>>> x86_64-w64-mingw32-gcc: warning:
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a: linker input
>>>>> file unused because linking not done
>>>>> x86_64-w64-mingw32-gcc -Wl,--nxcompat,--dynamicbase
>>>>> -Wl,--high-entropy-va -Wl,--as-needed -Wl,--image-base,0x140000000
>>>>> -I/home/rdp/new/sandbox/win64_static/build_files/include
>>>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib
>>>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -o
>>>>> /tmp/ffconf.L9GhKESq/test.exe /tmp/ffconf.L9GhKESq/test.o -lx265 -lgcc
>>>>> /usr/bin/x86_64-w64-mingw32-ld:
>>>>> /home/rdp/new/sandbox/win64_static/build_files/lib/libx265.a(api.cpp.obj):api.cpp:(.text+0xfb5):
>>>>> undefined reference to `operator new(unsigned long long)'
>>>>> /usr/bin/x86_64-w64-mingw32-ld:
>>>>> /home/rdp/new/sandbox/win64_static/build_files/lib/libx265.a(api.cpp.obj):api.cpp:(.text+0x1303):
>>>>> undefined reference to `operator delete(void*)'
>>>>> ...
>>>>>
>>>>> So it seems to be linking it not using the output of pkg-config --libs
>>>>> --static for linking or something?
>>>>
>>>> It's passing the pkg-config flags just fine.
>>>> The x265 .pc file is just broken and does not state its dependency on
>>>> libstdc++
>>>
>>> x265.pc does list libstdc++
>>>
>>> $ pkg-config --libs --static x265
>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -lgcc
>>
>> I don't think that's a valid way to specify libs by absolute path.
>
> There is nothing invalid about that, to my knowledge.
>
>> At least configure doesn't think so, it specifically looks for stuff starting with "-l" and discards the rest. Try adding -l: to the beginning.
>
> Just adding -l to the beginning does sound invalid though.
That's why I said -l:
> You could do -L/usr/lib/gcc/x86_64-w64-mingw32/10-win32/ -lstdc++
>
> But it should work just fine the way it is, I do not think discarding everything not starting with -l is correct.
>
>>
>>
>>> When I configure ffmpeg I specify ./configure --pkg-config-flags=--static
>>>
>>> But it appears to be rearranging the order when configure tries to use it?
>>>
>>> x86_64-w64-mingw32-gcc: warning:
>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a: linker input
>>> file unused because linking not done
>>> x86_64-w64-mingw32-gcc -Wl,--nxcompat,--dynamicbase
>>> -Wl,--high-entropy-va -Wl,--as-needed -Wl,--image-base,0x140000000
>>> -I/home/rdp/new/sandbox/win64_static/build_files/include
>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib
>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -o
>>> /tmp/ffconf.L9GhKESq/test.exe /tmp/ffconf.L9GhKESq/test.o -lx265 -lgcc
>>> # THIS LINE has only x265 and lgcc
>>>
>>> /usr/bin/x86_64-w64-mingw32-ld:
>>> /home/rdp/new/sandbox/win64_static/build_files/lib/libx265.a(api.cpp.obj):api.cpp:(.text+0xfb5):
>>> undefined reference to `operator new(unsigned long long)'
>>>
>>>
>>> Possibly useful info:
>>>
>>> $ pkg-config --libs x265
>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>> $ pkg-config --libs x265 --static
>>> -L/home/rdp/new/sandbox/win64_static/build_files/lib -lx265
>>> /usr/lib/gcc/x86_64-w64-mingw32/10-win32/libstdc++.a -lgcc
>>>
>>> It doesn't seem to be using either of those somehow...though I suppose
>>> if I cared enough I could try and figure it out :)
>>>
>>> Cheers, thank you!
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