cmake_options.txt

https://github.com/llvm/llvm-project

https://llvm.org/docs/CMake.html

Top-level LLVM CMakeLists.txt
https://raw.githubusercontent.com/llvm/llvm-project/master/llvm/CMakeLists.txt


LLVM_ENABLE_PROJECTS=';'.join(self.get_llvm_enabled_projects()),


CMAKE_INSTALL_PREFIX=self.install_prefix,
CMAKE_BUILD_TYPE='Release',
LLVM_TARGETS_TO_BUILD='X86',
LLVM_CCACHE_BUILD=ON,
LLVM_CCACHE_MAXSIZE='100G',
LLVM_CCACHE_DIR=os.path.expanduser('~/.ccache-llvm'),

BUILD_SHARED_LIBS=ON,

---------------------------------------------------------------------------------------------------
Clang CMake flags
---------------------------------------------------------------------------------------------------

Clang CMakeLists.txt:

https://raw.githubusercontent.com/llvm/llvm-project/master/clang/CMakeLists.txt

CLANG_DEFAULT_CXX_STDLIB='libc++',
CLANG_DEFAULT_RTLIB='compiler-rt',
CLANG_DEFAULT_LINKER='lld',

---------------------------------------------------------------------------------------------------
libcxx CMake flags
---------------------------------------------------------------------------------------------------

LIBCXX_CXX_ABI
~~~~~~~~~~~~~~

This option, if specified during stage 1 build, causes the build to fail to find cxxabi.h.
This could be due to some concurrency issues in the build?

https://raw.githubusercontent.com/llvm/llvm-project/master/libcxx/CMakeLists.txt

https://libcxx.llvm.org/docs/BuildingLibcxx.html

LIBCXX_CXX_ABI='libcxxabi',

LIBCXX_CXX_ABI:STRING
Values: none, libcxxabi, libcxxrt, libstdc++, libsupc++.
Select the ABI library to build libc++ against.

set(LIBCXX_CXX_ABI "default" CACHE STRING "Specify C++ ABI library to use.")
set(CXXABIS none default libcxxabi libcxxrt libstdc++ libsupc++ vcruntime)
set_property(CACHE LIBCXX_CXX_ABI PROPERTY STRINGS ;${CXXABIS})

# Setup the default options if LIBCXX_CXX_ABI is not specified.
if (LIBCXX_CXX_ABI STREQUAL "default")
  if (LIBCXX_TARGETING_MSVC)
    # FIXME: Figure out how to configure the ABI library on Windows.
    set(LIBCXX_CXX_ABI_LIBNAME "vcruntime")
  elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
    set(LIBCXX_CXX_ABI_LIBNAME "libcxxrt")
  elseif (NOT LIBCXX_STANDALONE_BUILD OR HAVE_LIBCXXABI)
    set(LIBCXX_CXX_ABI_LIBNAME "libcxxabi")
  else()
    set(LIBCXX_CXX_ABI_LIBNAME "default")
  endif()
else()
  set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")
endif()

LIBCXX_USE_COMPILER_RT=ON,

---------------------------------------------------------------------------------------------------

CMake Warning:
  Manually-specified variables were not used by the project:
    LIBCXX_HAS_GCC_S_LIB

It looks like this option might not exist.

---------------------------------------------------------------------------------------------------
libcxxabi CMake flags
---------------------------------------------------------------------------------------------------

https://raw.githubusercontent.com/llvm/llvm-project/master/libcxxabi/CMakeLists.txt

LIBCXXABI_USE_COMPILER_RT=ON
LIBCXXABI_USE_LLVM_UNWINDER=ON

---------------------------------------------------------------------------------------------------
libunwind CMake flags
---------------------------------------------------------------------------------------------------

LIBUNWIND_USE_COMPILER_RT=ON,


-----

Flags that worked to some extent:

[helpers.py:34] 2020-07-19 23:16:35,166 INFO: Running command:
['/opt/yb-build/cmake/cmake-3.18.0-Linux-x86_64/bin/cmake', '-G',
'Ninja', '-S', '/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/llvm',
'-DLLVM_ENABLE_PROJECTS=clang;clang-tools-extra;compiler-rt;libcxx;libcxxabi;libunwind;lld',
'-DCMAKE_INSTALL_PREFIX=/opt/yb-build/llvm/llvm-v10.0.0/stage-2/installed',
'-DCMAKE_BUILD_TYPE=Release', '-DLLVM_TARGETS_TO_BUILD=X86',
'-DLLVM_CCACHE_BUILD=ON', '-DLLVM_CCACHE_MAXSIZE=100G',
'-DLLVM_CCACHE_DIR=/nfusr/dev-server/mbautin2/.ccache-llvm',
'-DCLANG_DEFAULT_CXX_STDLIB=libc++',
'-DCLANG_DEFAULT_RTLIB=compiler-rt',
'-DLIBCXXABI_USE_LLVM_UNWINDER=ON'] (current directory:
/opt/yb-build/llvm/llvm-v10.0.0/stage-2/build)


[helpers.py:34] 2020-07-19 23:41:08,794 INFO: Running command:
['/opt/yb-build/cmake/cmake-3.18.0-Linux-x86_64/bin/cmake', '-G',
'Ninja', '-S', '/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/llvm',
'-DLLVM_ENABLE_PROJECTS=clang;clang-tools-extra;compiler-rt;libcxx;libcxxabi;libunwind;lld',
'-DCMAKE_INSTALL_PREFIX=/opt/yb-build/llvm/llvm-v10.0.0/stage-2/installed',
'-DCMAKE_BUILD_TYPE=Release', '-DLLVM_TARGETS_TO_BUILD=X86',
'-DLLVM_CCACHE_BUILD=ON', '-DLLVM_CCACHE_MAXSIZE=100G',
'-DLLVM_CCACHE_DIR=/nfusr/dev-server/mbautin2/.ccache-llvm',
'-DCLANG_DEFAULT_CXX_STDLIB=libc++',
'-DCLANG_DEFAULT_RTLIB=compiler-rt',
'-DLIBCXXABI_USE_LLVM_UNWINDER=ON',
'-DCMAKE_C_COMPILER=/opt/yb-build/llvm/llvm-v10.0.0/stage-1/installed/bin/clang',
'-DCMAKE_CXX_COMPILER=/opt/yb-build/llvm/llvm-v10.0.0/stage-1/installed/bin/clang++',
'-DLLVM_ENABLE_LLD=ON', '-DLLVM_ENABLE_LIBCXX=ON',
'-DLLVM_ENABLE_LTO=Full', '-DLLVM_BUILD_TESTS=ON'] (current directory:
/opt/yb-build/llvm/llvm-v10.0.0/stage-2/build)

---

Warnings to investigate:

CMake Warning at utils/benchmark/CMakeLists.txt:244 (message):
  Using std::regex with exceptions disabled is not fully supported


---

Failing to use cxxabi.h

FAILED: projects/libcxx/src/CMakeFiles/cxx_static.dir/new.cpp.o
CCACHE_DIR=/nfusr/dev-server/mbautin3/.ccache-llvm CCACHE_MAXSIZE=100G
CCACHE_CPP2=yes CCACHE_HASHDIR=yes /usr/bin/ccache
/opt/yb-build/llvm/llvm-v10.0.0/stage-1/installed/bin/clang++ -DNDEBUG
-D_GNU_SOURCE -D_LIBCPP_BUILDING_LIBRARY
-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_LINK_PTHREAD_LIB
-D_LIBCPP_LINK_RT_LIB -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -Iprojects/libcxx/src
-I/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/libcxx/src -Iinclude
-I/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/llvm/include
-Iprojects/libcxx/include/c++build
-I/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/libcxx/include -fPIC
-fvisibility-inlines-hidden -Werror=date-time
-Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter
-Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wno-long-long
-Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type
-Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion
-fdiagnostics-color -ffunction-sections -fdata-sections -O3
-DLIBCXX_BUILDING_LIBCXXABI -nostdinc++ -fvisibility-inlines-hidden
-fvisibility=hidden -Wall -Wextra -W -Wwrite-strings
-Wno-unused-parameter -Wno-long-long -Werror=return-type -Wextra-semi
-Wno-user-defined-literals -Wno-covered-switch-default
-Wno-ignored-attributes -Wno-error -std=c++14 -MD -MT
projects/libcxx/src/CMakeFiles/cxx_static.dir/new.cpp.o -MF
projects/libcxx/src/CMakeFiles/cxx_static.dir/new.cpp.o.d -o
projects/libcxx/src/CMakeFiles/cxx_static.dir/new.cpp.o -c
/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/libcxx/src/new.cpp
/opt/yb-build/llvm/llvm-v10.0.0/src/llvm-project/libcxx/src/new.cpp:19:13:
fatal error: 'cxxabi.h' file not found # include <cxxabi.h> ^~~~~~~~~~