LLVM's build system creates NATIVE/bin/llvm-config by reexecuting cmake
with entirely new flags. Problematically, the `CMAKE_INSTALL_*` flags
are not inherited, causing llvm-config-native to return wrong
installation paths, e. g. CMAKE_INSTALL_LIBDIR would default to `lib64`
on x86_64-linux. Previously this was masked by outputs.patch which
replaced ActiveLibDir with a string passed in from Nix, however
`--cmakedir` for example would turn out to be wrong always, breaking
cross-compilation of e. g. lld.
Additionally LLVM_ENABLE_RTTI needs to be repassed, as it is used to
determine if RTTI is available. Passing LLVM_LINK_LLVM_DYLIB is crucial
if we are building LLVM non-statically: It influences the --shared-mode
flag (which should indicate that -lLLVM is enough to link all
components) and makes --link-shared work in the first place,
i. e. llvm-config-native believes the built shared libs don't exist
unless we repass this flag.
Passing LLVM_LINK_LLVM_DYLIB=ON, however, makes the native build produce
a full libLLVM.so which is something we don't want, so we introduce a
patch which forces llvm-config to link statically against the LLVM
components it needs.
[ 11%] Building CXX object lib/xray/CMakeFiles/clang_rt.xray-x86_64.dir/xray_buffer_queue.cc.o
In file included from lib/xray/xray_buffer_queue.cc:15:
lib/xray/xray_buffer_queue.h:35:5: error: 'size_t' does not name a type
35 | size_t Size = 0;
| ^~~~~~
lib/xray/xray_buffer_queue.h:23:1: note: 'size_t' is defined in header '<cstddef>';
did you forget to '#include <cstddef>'?
22 | #include <utility>
+++ |+#include <cstddef>
23 |
In https://gcc.gnu.org/PR103598 we found out that gcc-12
changed __PRETTY_FUNCTION__ slightly and broke llvm-12 (and older)
tests that rely on exact type match. llvm-13 already removed the
qualified names from the expected output.
This change changes expected output to avoid llvm:: namespace prefix.
This is enough to get tests pass on x86_64 again.
Tested against this week's gcc-12 and against gcc-10.
Since both static and shared libs are installed to the same `lib`
output, we override the ActiveLibDir unconditionally.
Fixes `llvm-config-native --link-static --libs`
Without the fix build fails on gcc-12 as:
/build/llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp:
In member function 'std::string llvm::NVPTXAsmPrinter::getPTXFundamentalTypeStr(...':
/build/llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp:1319:10:
error: use of deleted function 'std::__cxx11::basic_string<...>; std::nullptr_t = std::nullptr_t]'
1319 | return nullptr;
| ^~~~~~~
The patch is present in upstream releases since llvm-12.
Commit 199b7c50 "compiler-rt: remove <cyclades.h> from libsanitizer"
broke conditional conditional musl patches.
The change has a few effects:
- pkgsStatic.llvmPackages_{5,6,7}.compiler-rt: fix build on musl after cyclades backport
- pkgsStatic.llvmPackages_{{5..13},git}.compiler-rt: drop incomplete musl patches as
sanitizers are disabled anyway and require more upstream porting.
the fix to extendDerivation in #140051 unwittingly worsened eval performance by
quite a bit. set elements alone needed over 1GB extra after the change, which
seems disproportionate to how small it was. if we flip the logic used to
determine which outputs to install around and keep a "this one exactly" flag in
the specific outputs instead of a "all of them" in the root we can avoid most
of that cost.
linux-headers-5.13 removed <cyclades.h> along with device support.
Backport a single https://reviews.llvm.org/D102059 upstream change to
fix compiler-rt build.
Use local patches as there is a whitespace change compared to upstream.
When using GNU binutils, clang passes the LLVMgold.so plugin to the
linker for certain operations that require special support in the linker
like doing link time optimization (LTO). When passing the plugin to the
linker's command line, clang assumes that llvm and itself are installed
in the same prefix and thus `/path/to/clang/bin/../lib/LLVMgold.so` is
the plugin.
Since we install clang and llvm to separate store paths, this assumption
does not hold. When clang-unwrapped only had a single output, we worked
around this issue by symlinking `$out/lib/LLVMgold.so` to
`${llvm}/lib/LLVMgold.so`. However since we split all llvm packages into
multiple outputs clang's `$out` no longer has a lib directory and clang
can't discover clangs lib output on its own. As a result LTO was broken.
Instead of introducing yet another hack and having a symlink to
LLVMgold.so in `$out/lib` (despite having `$lib/lib` as well), we patch
clang to use a hard coded path to `${libllvm.lib}/lib` for discovering
`LLVMgold.so`.
Resolves#123361.
The main thing was using `llvm_meta` in all versions.
Secondarily:
- libunwindx7: Forgot to split outputs
- libcxx{,abi} 12: Forgot to apply output-splitting patches.
- simplify `useLLVM` stdenv-switching logic.
- openmp always gets its own directory
In 7869d16545 I got rid of the symlinking
by forcing `COMPILER_RT_OS_DIR` to always be the empty string. I thought
this was good because it just make compiler-rt be installed in a normal
way.
However, various LLVM tools expect the `COMPILER_RT_OS_DIR` to be set
normally, and fail to find things when they aren't in the expected lib
subdir.
Maybe it would be best to patch that too in the long term, but for now
we just undo this change.
Also begin to start work on cross compilation, though that will have to
be finished later.
The patches are based on the first version of
https://reviews.llvm.org/D99484. It's very annoying to do the
back-porting but the review has uncovered nothing super major so I'm
fine sticking with what I've got.
Beyond making the outputs work, I also strove to re-sync the packages,
as they have been drifting pointlessly apart for some time.
----
Other misc notes, highly incomplete
- lvm-config-native and llvm-config are put in `dev` because they are
tools just for build time.
- Clang no longer has an lld dep. That was introduced in
db29857eb3, but if clang needs help
finding lld when it is used we should just pass it flags / put in the
resource dir. Providing it at build time increases critical path
length for no good reason.
----
A note on `nativeCC`:
`stdenv` takes tools from the previous stage, so:
1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.stdenv.cc`: `(?0, ?1, x)`
while:
1. `pkgsBuildBuild`: `(?1, x, x)`
2. `pkgsBuildBuild.targetPackages`: `(x, x, ?2)`
3. `pkgsBuildBuild.targetPackages.stdenv.cc`: `(?1, x, x)`
This patches are included from libcxx and libcxxabi when
stdenv.hostPlatform.isMusl. After #117433 the patchs to that patch
wasn't adjusted for the new structure, likely because it doesn't come up
during normal eval. This fixes (among other attribute paths):
* pkgsMusl.llvmPackages_12.libcxxabi
* pkgsMusl.llvmPackages_12.libcxx
* pkgsMusl.llvmPackages_11.libcxxabi
* pkgsMusl.llvmPackages_11.libcxx
* pkgsMusl.llvmPackages_10.libcxxabi
* pkgsMusl.llvmPackages_10.libcxx
* pkgsMusl.llvmPackages_9.libcxxabi
* pkgsMusl.llvmPackages_9.libcxx
* pkgsMusl.llvmPackages_8.libcxxabi
* pkgsMusl.llvmPackages_8.libcxx
* pkgsMusl.llvmPackages_7.libcxxabi
* pkgsMusl.llvmPackages_7.libcxx
* pkgsMusl.llvmPackages_6.libcxxabi
* pkgsMusl.llvmPackages_6.libcxx
* pkgsMusl.llvmPackages_5.libcxxabi
* pkgsMusl.llvmPackages_5.libcxx
Only evaluation was tested, not compilation though.
This reverts commit c778945806.
I believe this is exactly what brings the staging branch into
the right shape after the last merge from master (through staging-next);
otherwise part of staging changes would be lost
(due to being already reachable from master but reverted).
I hate the thing too even though I made it, and rather just get rid of
it. But we can't do that yet. In the meantime, this brings us more
inline with autoconf and will make it slightly easier for me to write a
pkg-config wrapper, which we need.
Naive concatenation of $LD_LIBRARY_PATH can result in an empty
colon-delimited segment; this tells glibc to load libraries from the
current directory, which is definitely wrong, and may be a security
vulnerability if the current directory is untrusted. (See #67234, for
example.) Fix this throughout the tree.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Quoting from the splitString docstring:
NOTE: this function is not performant and should never be used.
This replaces trivial uses of splitString for splitting version
strings with the (potentially builtin) splitVersion.
clang needs to find headers + libraries for compiling with libc++. We
need to add a libcxx argument to cc-wrapper. This means you do not
have to pass in c++ headers directly.
This resolves the last case remaining of #30670. Darwin clang++ now
works properly.
Fixes#30670
This is necessary to avoid objc errors like:
"_OBJC_CLASS_$_NSDictionary", referenced from:
objc-class-ref in liblldbHost.a(HostInfoMacOSX.mm.o)
objc-class-ref in liblldbPluginPlatformMacOSX.a(PlatformiOSSimulatorCoreSimulatorSupport.mm.o)
ld: symbol(s) not found for architecture x86_64
LTO is disabled during bootstrap to keep the bootstrap tools small and
avoid unnecessary LLVM rebuilds, but is enabled in the final stdenv
stage and should be usable by normal packages.
On darwin llvmPackages is built using python-boot to avoid dependencies
in the stdenv, but we can't and shouldn't use that when building the
manpages since it depends on python packages.
