I tried to build but it stops after 648 minutes lol. I get the same error as xeno74 observed:
648:35.71 ../../../../../build/unix/gold/ld: error: /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/../freebl_gcm-aes-ppc_c_lib/sha512-p8.o: ABI version 2 is not compatible with ABI version 1 output
I know what to do now...
648:35.32 Executing: /usr/bin/g++ -flax-vector-conversions -fpermissive -O3 -falign-loops=16 -falign-functions=16 -falign-labels=16 -falign-jumps=16 -maltivec -mabi=altivec -Wall -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wc++1z-compat -Wimplicit-fallthrough -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=multistatement-macros -fno-sized-deallocation -flifetime-dse=1 -fno-exceptions -fno-strict-aliasing -fno-rtti -fno-exceptions -fno-math-errno -pipe -pthread -g -freorder-blocks -O2 -fomit-frame-pointer -fPIC -shared -Wl,-z,defs -Wl,-h,libfreeblpriv3.so -o libfreeblpriv3.so /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/tmp0WZTwi.list -lpthread -Wl,-z,noexecstack -Wl,-z,text -Wl,--build-id -B ../../../../../build/unix/gold -Wl,-rpath-link,/home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/dist/bin -Wl,-rpath-link,/usr/local/lib ../../../../../config/external/nspr/pr/libnspr4.so ../../../../../config/external/nspr/libc/libplc4.so ../../../../../config/external/nspr/ds/libplds4.so -Wl,--version-script,out.freebl_hash_vector.def -ldl -lpthread -ldl -lc
648:35.32 /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/tmp0WZTwi.list:
...
...
...
648:35.71 ../../../../../build/unix/gold/ld: warning: wildcard match appears in both version 'NSSprivate_3.11' and 'NSSprivate_3.16' in script
648:35.71 ../../../../../build/unix/gold/ld: error: /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/../freebl_gcm-aes-ppc_c_lib/sha512-p8.o: ABI version 2 is not compatible with ABI version 1 output
648:35.71 collect2: error: ld returned 1 exit status
648:35.71 gmake[5]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/rules.mk:772: libfreeblpriv3.so] Error 1
648:35.71 gmake[4]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/recurse.mk:71: security/nss/lib/freebl/freebl_freeblpriv3/target] Error 2
648:35.72 gmake[3]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/recurse.mk:33: compile] Error 2
648:35.72 gmake[2]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/rules.mk:493: default] Error 2
648:35.73 gmake[1]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/client.mk:406: realbuild] Error 2
648:35.73 gmake: *** [client.mk:164: build] Error 2
648:35.77 914 compiler warnings present.
648:41.56 Notification center failed: The name org.freedesktop.Notifications was not provided by any .service files
648:35.71 ../../../../../build/unix/gold/ld: error: /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/../freebl_gcm-aes-ppc_c_lib/sha512-p8.o: ABI version 2 is not compatible with ABI version 1 output
I know what to do now...
648:35.32 Executing: /usr/bin/g++ -flax-vector-conversions -fpermissive -O3 -falign-loops=16 -falign-functions=16 -falign-labels=16 -falign-jumps=16 -maltivec -mabi=altivec -Wall -Wempty-body -Wignored-qualifiers -Woverloaded-virtual -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wwrite-strings -Wno-invalid-offsetof -Wc++1z-compat -Wimplicit-fallthrough -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=multistatement-macros -fno-sized-deallocation -flifetime-dse=1 -fno-exceptions -fno-strict-aliasing -fno-rtti -fno-exceptions -fno-math-errno -pipe -pthread -g -freorder-blocks -O2 -fomit-frame-pointer -fPIC -shared -Wl,-z,defs -Wl,-h,libfreeblpriv3.so -o libfreeblpriv3.so /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/tmp0WZTwi.list -lpthread -Wl,-z,noexecstack -Wl,-z,text -Wl,--build-id -B ../../../../../build/unix/gold -Wl,-rpath-link,/home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/dist/bin -Wl,-rpath-link,/usr/local/lib ../../../../../config/external/nspr/pr/libnspr4.so ../../../../../config/external/nspr/libc/libplc4.so ../../../../../config/external/nspr/ds/libplds4.so -Wl,--version-script,out.freebl_hash_vector.def -ldl -lpthread -ldl -lc
648:35.32 /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/tmp0WZTwi.list:
...
...
...
648:35.71 ../../../../../build/unix/gold/ld: warning: wildcard match appears in both version 'NSSprivate_3.11' and 'NSSprivate_3.16' in script
648:35.71 ../../../../../build/unix/gold/ld: error: /home/jeroen/src/other/sealion/SeaLion-32.5.0/obj-powerpc64-linux-gnu/security/nss/lib/freebl/freebl_freeblpriv3/../freebl_gcm-aes-ppc_c_lib/sha512-p8.o: ABI version 2 is not compatible with ABI version 1 output
648:35.71 collect2: error: ld returned 1 exit status
648:35.71 gmake[5]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/rules.mk:772: libfreeblpriv3.so] Error 1
648:35.71 gmake[4]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/recurse.mk:71: security/nss/lib/freebl/freebl_freeblpriv3/target] Error 2
648:35.72 gmake[3]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/recurse.mk:33: compile] Error 2
648:35.72 gmake[2]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/platform/config/rules.mk:493: default] Error 2
648:35.73 gmake[1]: *** [/home/jeroen/src/other/sealion/SeaLion-32.5.0/client.mk:406: realbuild] Error 2
648:35.73 gmake: *** [client.mk:164: build] Error 2
648:35.77 914 compiler warnings present.
648:41.56 Notification center failed: The name org.freedesktop.Notifications was not provided by any .service files