linking error when integrating with libchipmunk on linux

[JakkuSakura]

• cocos2d-x version: v4.0
• devices test on: manjaro linux
• developing environments
  gcc 9.2.1
  This reproduces every time I try to compile a hello world cpp project. When I turned off physics both in ccConfig.h and external/CMakeLists.txt. It's finally avoided but not solved yet.
  It seems like that I missed some dependencies, since I cannot install these libraries listed on install-deps-linux.sh directly.
  I tried recompiling the libchipmunk and replace it, but it remains other linking errors with cocos2dx itself.

/usr/bin/ld: ../frameworks/cocos2d-x/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpDampedRotarySprin
g.c.o): in function `preStep':
cpDampedRotarySpring.c:(.text+0xf2): undefined reference to `__expf_finite'
/usr/bin/ld: ../frameworks/cocos2d-x/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpGrooveJoint.c.o):
 in function `preStep':
cpGrooveJoint.c:(.text+0x327): undefined reference to `__powf_finite'
/usr/bin/ld: ../frameworks/cocos2d-x/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpSlideJoint.c.o): 
in function `preStep':
cpSlideJoint.c:(.text+0x42b): undefined reference to `__powf_finite'
/usr/bin/ld: ../frameworks/cocos2d-x/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpPivotJoint.c.o): 
in function `preStep':
cpPivotJoint.c:(.text+0x1e8): undefined reference to `__powf_finite'
/usr/bin/ld: ../frameworks/cocos2d-x/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpRatchetJoint.c.o)
(much more the same error)

[JakkuSakura]

It seems that libchipmunk 7 uses a fast version of power function, which is cancelled on new glibc
See
google/filament#2146

[JakkuSakura]

Recompling libchipmunk 7.0.1 without fast-math by removing --ffast-math in libchipmunk/CMakeLists.txt(you have to download it manually) and replace the one within the cocos2d-x would solve it.

Here's a precompiled file with the method mentioned above. x86_64, gcc 9.2.1
libchipmunk7.0.1.zip

[edv4rd0]

I am having the same issue with Fedora 32, thanks for your workaround.

/usr/bin/ld: ../../../../../external/linux-specific/fmod/prebuilt/64-bit/libfmod.so: .dynsym local symbol at index 3 (>= sh_info of 2)
/usr/bin/ld: ../../../../../external/linux-specific/fmod/prebuilt/64-bit/libfmod.so: .dynsym local symbol at index 4 (>= sh_info of 2)
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpGearJoint.c.o): in function `preStep':
cpGearJoint.c:(.text+0x144): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpDampedSpring.c.o): in function `preStep':
cpDampedSpring.c:(.text+0x1fd): undefined reference to `__expf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpRotaryLimitJoint.c.o): in function `preStep':
cpRotaryLimitJoint.c:(.text+0x17d): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpDampedRotarySpring.c.o): in function `preStep':
cpDampedRotarySpring.c:(.text+0xf2): undefined reference to `__expf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpGrooveJoint.c.o): in function `preStep':
cpGrooveJoint.c:(.text+0x327): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpSlideJoint.c.o): in function `preStep':
cpSlideJoint.c:(.text+0x42b): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpPivotJoint.c.o): in function `preStep':
cpPivotJoint.c:(.text+0x1e8): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpRatchetJoint.c.o): in function `preStep':
cpRatchetJoint.c:(.text+0x16a): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpPinJoint.c.o): in function `preStep':
cpPinJoint.c:(.text+0x324): undefined reference to `__powf_finite'
/usr/bin/ld: ../../../../../external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a(cpHastySpace.c.o):cpHastySpace.c:(.text+0x560): more undefined references to `__powf_finite' follow
collect2: error: ld returned 1 exit status
make[2]: *** [engine/tests/cpp-empty-test/CMakeFiles/cpp-empty-test.dir/build.make:172: bin/cpp-empty-test/cpp-empty-test] Error 1
make[1]: *** [CMakeFiles/Makefile2:1253: engine/tests/cpp-empty-test/CMakeFiles/cpp-empty-test.dir/all] Error 2
make: *** [Makefile:104: all] Error 2

[CustomLenny]

@qiujiangkun compiling chipmunk myself (with or without -ffast-math) or using your supplied lib all result in the same thing, and that is, while it does compile, none of the chipmunk examples work in PhysicsTest in the cpp-tests, they are all just static or bugging out.

[poorie]

Recompling libchipmunk 7.0.1 without fast-math by removing --ffast-math in libchipmunk/CMakeLists.txt(you have to download it manually) and replace the one within the cocos2d-x would solve it.

Here's a precompiled file with the method mentioned above. x86_64, gcc 9.2.1
libchipmunk7.0.1.zip

Thank you very much!!! Copied over the version you shared and TA-DA!!!! ... Cocoa-2d-x launches with hello world!

OLD:

$ md5sum ../cocos2d/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a
311b028fed83ff96109548399961de55  ../cocos2d/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a

NEW:

$ md5sum ../cocos2d/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a
f0fe70ff96f5690fd3f8d8fca594e9c1  ../cocos2d/external/chipmunk/prebuilt/linux/64-bit/libchipmunk.a

[raulcesar]

@CustomLenny , I was able to fix the issue by compiling chipmunk with -fno-builtin flag, then substituting libchipmunk.a in cocos project. (as per link referenced by @qiujiangkun (google/filament#2146))

[jack9603301]

Can you consider allowing users to compile other dependencies they need in the documentation and cocos2dx deployment (including the dependency libraries involved in the bug to obtain the highest ABI compatibility, which can be done using automated scripts)

[JakkuSakura]

Can you consider allowing users to compile other dependencies they need in the documentation and cocos2dx deployment (including the dependency libraries involved in the bug to obtain the highest ABI compatibility, which can be done using automated scripts)

There's a very good practice by https://github.com/KomodoPlatform/antara-gaming-sdk, which provides multiple ways to compile dependencies: vcpkg, source code from zip and from git repositories

[jack9603301]

Can you consider allowing users to compile other dependencies they need in the documentation and cocos2dx deployment (including the dependency libraries involved in the bug to obtain the highest ABI compatibility, which can be done using automated scripts)

There's a very good practice by https://github.com/KomodoPlatform/antara-gaming-sdk, which provides multiple ways to compile dependencies

what do you mean? I do not understand

[tekeoglan]

@qiujiangkun compiling chipmunk myself (with or without -ffast-math) or using your supplied lib all result in the same thing, and that is, while it does compile, none of the chipmunk examples work in PhysicsTest in the cpp-tests, they are all just static or bugging out.

i had the same issue then i tried erasing -ffast-math and i left it's place as blank,then i recompiled libchipmunk which i downloaded at the internet with my chipmunk's headers that are exist in my recent project then i replaced chipmunk.a that i've compiled with my project has.
Sorry for my english,i hope you'll understand...(btw i found the solution in almost 5 days :D )

[rapoma]

@qiujiangkun compiling chipmunk myself (with or without -ffast-math) or using your supplied lib all result in the same thing, and that is, while it does compile, none of the chipmunk examples work in PhysicsTest in the cpp-tests, they are all just static or bugging out.

i had the same issue then i tried erasing -ffast-math and i left it's place as blank,then i recompiled libchipmunk which i downloaded at the internet with my chipmunk's headers that are exist in my recent project then i replaced chipmunk.a that i've compiled with my project has.
Sorry for my english,i hope you'll understand...(btw i found the solution in almost 5 days :D )

Did this and run cpp-test chipmunk and got

munmap_chunk(): invalid pointer
Aborted (core dumped)