#warning imp_implementationWithBlock() not implemented for your architecture

[aperezbios]

on ppc64, compiling libobjc2 fails during linking with "ManyManySelectors.m.o: In function main': /home/cyrus/libobjc2/Test/ManyManySelectors.m:(.text+0x618): undefined reference toobjc_msgSend'"

but I also see "#warning imp_implementationWithBlock() not implemented for your architecture"

`cyrus@cyrus:~/libobjc2/Build$ make Scanning dependencies of target objc [ 1%] Building C object CMakeFiles/objc.dir/abi_version.c.o [ 2%] Building C object CMakeFiles/objc.dir/alias_table.c.o [ 3%] Building C object CMakeFiles/objc.dir/block_to_imp.c.o /home/cyrus/libobjc2/block_to_imp.c:59:19: warning: passing 'const char *' to parameter of type 'char *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers] int fd = mkstemp(pattern); ^~~~~~~ /usr/include/stdlib.h:619:27: note: passing argument to parameter '__template' here extern int mkstemp (char *__template) __nonnull ((1)) __wur; ^ /home/cyrus/libobjc2/block_to_imp.c:61:7: warning: passing 'const char *' to parameter of type 'void *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers] free(pattern); ^~~~~~~ /usr/include/stdlib.h:483:25: note: passing argument to parameter '__ptr' here extern void free (void *__ptr) __THROW; ^ 2 warnings generated. [ 4%] Building C object CMakeFiles/objc.dir/caps.c.o [ 5%] Building C object CMakeFiles/objc.dir/category_loader.c.o [ 6%] Building C object CMakeFiles/objc.dir/class_table.c.o [ 8%] Building C object CMakeFiles/objc.dir/dtable.c.o [ 9%] Building C object CMakeFiles/objc.dir/eh_personality.c.o [ 10%] Building C object CMakeFiles/objc.dir/encoding2.c.o [ 11%] Building C object CMakeFiles/objc.dir/hash_table.c.o [ 12%] Building C object CMakeFiles/objc.dir/hooks.c.o [ 13%] Building C object CMakeFiles/objc.dir/ivar.c.o [ 15%] Building C object CMakeFiles/objc.dir/legacy_malloc.c.o [ 16%] Building C object CMakeFiles/objc.dir/loader.c.o [ 17%] Building C object CMakeFiles/objc.dir/mutation.m.o [ 18%] Building C object CMakeFiles/objc.dir/protocol.c.o [ 19%] Building C object CMakeFiles/objc.dir/runtime.c.o [ 20%] Building C object CMakeFiles/objc.dir/sarray2.c.o [ 22%] Building C object CMakeFiles/objc.dir/selector_table.c.o [ 23%] Building C object CMakeFiles/objc.dir/sendmsg2.c.o [ 24%] Building C object CMakeFiles/objc.dir/statics_loader.c.o [ 25%] Building C object CMakeFiles/objc.dir/toydispatch.c.o [ 26%] Building ASM object CMakeFiles/objc.dir/block_trampolines.S.o /home/cyrus/libobjc2/block_trampolines.S:106:2: warning: imp_implementationWithBlock() not implemented for your architecture [-W#warnings]

warning imp_implementationWithBlock() not implemented for your architecture

^ 1 warning generated. [ 27%] Building ASM object CMakeFiles/objc.dir/objc_msgSend.S.o /home/cyrus/libobjc2/objc_msgSend.S:11:2: warning: objc_msgSend() not implemented for your architecture [-W#warnings]

warning objc_msgSend() not implemented for your architecture

^ 1 warning generated. [ 29%] Building C object CMakeFiles/objc.dir/NSBlocks.m.o [ 30%] Building C object CMakeFiles/objc.dir/Protocol2.m.o [ 31%] Building C object CMakeFiles/objc.dir/arc.m.o [ 32%] Building C object CMakeFiles/objc.dir/associate.m.o [ 33%] Building C object CMakeFiles/objc.dir/blocks_runtime.m.o [ 34%] Building C object CMakeFiles/objc.dir/properties.m.o [ 36%] Building C object CMakeFiles/objc.dir/gc_none.c.o Linking C shared library libobjc.so [ 36%] Built target objc Scanning dependencies of target objcxx [ 37%] Building CXX object CMakeFiles/objcxx.dir/objcxx_eh.cc.o Linking C shared library libobjcxx.so [ 37%] Built target objcxx Scanning dependencies of target AllocatePair [ 38%] Building C object Test/CMakeFiles/AllocatePair.dir/AllocatePair.m.o Linking C executable AllocatePair [ 38%] Built target AllocatePair Scanning dependencies of target AllocatePair_optimised [ 39%] Building C object Test/CMakeFiles/AllocatePair_optimised.dir/AllocatePair.m.o Linking C executable AllocatePair_optimised [ 39%] Built target AllocatePair_optimised Scanning dependencies of target AssociatedObject [ 40%] Building C object Test/CMakeFiles/AssociatedObject.dir/AssociatedObject.m.o Linking C executable AssociatedObject [ 40%] Built target AssociatedObject Scanning dependencies of target AssociatedObject2 [ 41%] Building C object Test/CMakeFiles/AssociatedObject2.dir/AssociatedObject2.m.o Linking C executable AssociatedObject2 [ 41%] Built target AssociatedObject2 Scanning dependencies of target AssociatedObject2_optimised [ 43%] Building C object Test/CMakeFiles/AssociatedObject2_optimised.dir/AssociatedObject2.m.o Linking C executable AssociatedObject2_optimised [ 43%] Built target AssociatedObject2_optimised Scanning dependencies of target AssociatedObject_optimised [ 44%] Building C object Test/CMakeFiles/AssociatedObject_optimised.dir/AssociatedObject.m.o Linking C executable AssociatedObject_optimised [ 44%] Built target AssociatedObject_optimised Scanning dependencies of target BlockImpTest [ 45%] Building C object Test/CMakeFiles/BlockImpTest.dir/BlockImpTest.m.o Linking C executable BlockImpTest [ 45%] Built target BlockImpTest Scanning dependencies of target BlockImpTest_optimised [ 46%] Building C object Test/CMakeFiles/BlockImpTest_optimised.dir/BlockImpTest.m.o Linking C executable BlockImpTest_optimised [ 46%] Built target BlockImpTest_optimised Scanning dependencies of target BlockTest_arc [ 47%] Building C object Test/CMakeFiles/BlockTest_arc.dir/BlockTest_arc.m.o [ 48%] Building C object Test/CMakeFiles/BlockTest_arc.dir/Test.m.o Linking C executable BlockTest_arc [ 48%] Built target BlockTest_arc Scanning dependencies of target BlockTest_arc_optimised [ 50%] Building C object Test/CMakeFiles/BlockTest_arc_optimised.dir/BlockTest_arc.m.o [ 51%] Building C object Test/CMakeFiles/BlockTest_arc_optimised.dir/Test.m.o Linking C executable BlockTest_arc_optimised [ 51%] Built target BlockTest_arc_optimised Scanning dependencies of target BoxedForeignException [ 52%] Building C object Test/CMakeFiles/BoxedForeignException.dir/BoxedForeignException.m.o Linking C executable BoxedForeignException [ 52%] Built target BoxedForeignException Scanning dependencies of target BoxedForeignException_optimised [ 53%] Building C object Test/CMakeFiles/BoxedForeignException_optimised.dir/BoxedForeignException.m.o Linking C executable BoxedForeignException_optimised [ 53%] Built target BoxedForeignException_optimised Scanning dependencies of target CXXExceptions [ 54%] Building C object Test/CMakeFiles/CXXExceptions.dir/CXXException.m.o [ 55%] Building CXX object Test/CMakeFiles/CXXExceptions.dir/CXXException.cc.o Linking C executable CXXExceptions [ 55%] Built target CXXExceptions Scanning dependencies of target CXXExceptions_optimised [ 56%] Building C object Test/CMakeFiles/CXXExceptions_optimised.dir/CXXException.m.o [ 58%] Building CXX object Test/CMakeFiles/CXXExceptions_optimised.dir/CXXException.cc.o Linking C executable CXXExceptions_optimised [ 58%] Built target CXXExceptions_optimised Scanning dependencies of target ExceptionTest [ 59%] Building C object Test/CMakeFiles/ExceptionTest.dir/ExceptionTest.m.o Linking C executable ExceptionTest [ 59%] Built target ExceptionTest Scanning dependencies of target ExceptionTest_optimised [ 60%] Building C object Test/CMakeFiles/ExceptionTest_optimised.dir/ExceptionTest.m.o Linking C executable ExceptionTest_optimised [ 60%] Built target ExceptionTest_optimised Scanning dependencies of target ForeignException [ 61%] Building C object Test/CMakeFiles/ForeignException.dir/ForeignException.m.o Linking C executable ForeignException [ 61%] Built target ForeignException Scanning dependencies of target ForeignException_optimised [ 62%] Building C object Test/CMakeFiles/ForeignException_optimised.dir/ForeignException.m.o Linking C executable ForeignException_optimised [ 62%] Built target ForeignException_optimised Scanning dependencies of target Forward [ 63%] Building C object Test/CMakeFiles/Forward.dir/Forward.m.o Linking C executable Forward [ 63%] Built target Forward Scanning dependencies of target Forward_optimised [ 65%] Building C object Test/CMakeFiles/Forward_optimised.dir/Forward.m.o Linking C executable Forward_optimised [ 65%] Built target Forward_optimised Scanning dependencies of target ManyManySelectors [ 66%] Building C object Test/CMakeFiles/ManyManySelectors.dir/ManyManySelectors.m.o /home/cyrus/libobjc2/Test/ManyManySelectors.m:40:2: warning: implicitly declaring library function 'objc_msgSend' with type 'id (id, SEL, ...)' objc_msgSend([Test class], nextSel); ^ /home/cyrus/libobjc2/Test/ManyManySelectors.m:40:2: note: include the header <objc/message.h> or explicitly provide a declaration for 'objc_msgSend' 1 warning generated. Linking C executable ManyManySelectors CMakeFiles/ManyManySelectors.dir/ManyManySelectors.m.o: In function main': /home/cyrus/libobjc2/Test/ManyManySelectors.m:(.text+0x618): undefined reference toobjc_msgSend' clang: error: linker command failed with exit code 1 (use -v to see invocation) Test/CMakeFiles/ManyManySelectors.dir/build.make:86: recipe for target 'Test/ManyManySelectors' failed make[2]: *** [Test/ManyManySelectors] Error 1 CMakeFiles/Makefile2:981: recipe for target 'Test/CMakeFiles/ManyManySelectors.dir/all' failed make[1]: *** [Test/CMakeFiles/ManyManySelectors.dir/all] Error 2 Makefile:146: recipe for target 'all' failed make: *** [all] Error 2`

[davidchisnall]

This all looks expected. The assembly paths are not provided for PPC (patches very welcome, but I have no knowledge of PPC assembly nor access to hardware to test), and the tests of functions that are implemented in assembly will not pass for the same reason.

[aperezbios]

Thanks, @davidchisnall, I figured as much but wanted to offer up remote access to my hardware, if you have the time or inclination to poke at this.

[davidchisnall]

Closing - anyone who wants to write some PowerPC assembly can reopen...

[BertrandDekoninck]

I've found this implementation of objc_msgSend for ppc on here: https://github.com/jackoalan/gnustep-libobjc2/blob/wiistep/objc_msgSend.ppc.S. Could this be used and imported here ? And if it could, would this work also on ppc64 ?

[davidchisnall]

Hi, if the author is willing to contribute it then it's probably a good starting point. I think it predates the change to the SpareArray structure though, so it probably won't work as-is. You'll need to tweak the logic a bit.

[davidchisnall]

It also looks as if that's 32-bit only.