Changes between Version 9 and Version 10 of LibcxxOnOlderSystems

Timestamp:

Jan 19, 2015, 8:50:02 AM (9 years ago)

Author:

jeremyhu (Jeremy Huddleston Sequoia)

Comment:

Indicate the libmacho change has landed, simplify Leopard/ppc information

LibcxxOnOlderSystems

@@ -65 +65 @@
 == Leopard (ppc) ==
 
-PowerPC support is still under heavy development in llvm, so expect things to not be as stable as more established toolchains.  Additionally, it is non-trivial to bootstrap libc++ on Leopard because the libcxx port does not build with versions older than clang-3.6, and clang-3.5 and newer require libc++.  After setting up my Leopard/Intel Mac as described above, I've been able to *build* libc++ for ppc but it's not quite usable yet:
+Darwin/PowerPC support is still quite experimental in llvm, so expect things to not be as stable as more established toolchains.  Additionally, it is non-trivial to bootstrap libc++ on Leopard because the libcxx port does not build with versions older than clang-3.6, and clang-3.5 and newer require libc++.  After setting up my Leopard/Intel Mac as described above (fully upgraded through r131812), I've been able to *build* libc++ for ppc but it's not quite tested yet.
 {{{
 sudo port -v -s install clang-3.6
@@ -72 +72 @@
 sudo port -v -f uninstall libcxx libcxxabi libmacho libunwind
 
-# ld crashes in getsectiondata linking the ppc slice of libmacho if libmacho is built with macports-clang-3.6
-sudo port -v -s install libunwind universal_archs="x86_64 i386 ppc" configure.compiler=gcc-4.2
-
 sudo port -v -s install libcxx universal_archs="x86_64 i386 ppc" configure.compiler=macports-clang-3.6
 }}}
-
-The linker crashes when creating a trivial hello world executable.  This is a similar crash when building libmacho:
-{{{
-clang++-mp-3.6 -stdlib=libc++ -arch ppc hello_world.cxx 
-
-Thread 0 Crashed:
-0   libc++abi.dylib                     0x0000000100353f15 getsectiondata + 73 (getsecbyname.c:428)
-1   libc++abi.dylib                     0x00000001003580cf libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Re
-gisters_x86_64>::setInfoBasedOnIPRegister(bool) + 105
-2   libc++abi.dylib                     0x0000000100354c74 unw_init_local + 96
-3   libc++abi.dylib                     0x00000001003548e7 _Unwind_RaiseException + 72
-4   libc++abi.dylib                     0x00000001003500e8 __cxa_throw + 104
-5   ld                                  0x000000010000ecd6 Options::Options(int, char const**) + 0
-6   ld                                  0x000000010000c28f ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool) + 13
-95
-7   ld                                  0x000000010000d2ce ld::tool::InputFiles::InputFiles(Options&, char const**) + 372
-8   ld                                  0x000000010000a086 main + 145
-9   ld                                  0x0000000100002774 start + 52
-}}}
-
-I suspect the issue is in libmacho and will be testing a fix for it soon.
 
 == Tiger ==