llvm-project/libcxx/include/CMakeLists.txt

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CMake
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set(files
__bit_reference
__bsd_locale_defaults.h
__bsd_locale_fallbacks.h
__errc
__debug
__functional_03
__functional_base
__functional_base_03
__hash_table
__libcpp_version
__locale
__mutex_base
__node_handle
__nullptr
__split_buffer
__sso_allocator
__std_stream
__string
__threading_support
__tree
__tuple
__undef_macros
algorithm
any
array
atomic
barrier
bit
bitset
cassert
ccomplex
cctype
cerrno
cfenv
cfloat
charconv
chrono
cinttypes
ciso646
climits
clocale
cmath
codecvt
compare
complex
complex.h
concepts
condition_variable
csetjmp
csignal
cstdarg
cstdbool
cstddef
cstdint
cstdio
cstdlib
cstring
ctgmath
ctime
ctype.h
cwchar
cwctype
deque
errno.h
exception
execution
experimental/__config
experimental/__memory
experimental/algorithm
experimental/coroutine
experimental/deque
experimental/filesystem
experimental/forward_list
experimental/functional
experimental/iterator
experimental/list
experimental/map
experimental/memory_resource
experimental/propagate_const
experimental/regex
experimental/set
experimental/simd
experimental/string
experimental/type_traits
experimental/unordered_map
experimental/unordered_set
experimental/utility
experimental/vector
ext/__hash
ext/hash_map
ext/hash_set
fenv.h
filesystem
float.h
forward_list
fstream
functional
future
initializer_list
inttypes.h
iomanip
ios
iosfwd
iostream
istream
iterator
latch
limits
limits.h
list
locale
locale.h
map
math.h
memory
module.modulemap
mutex
new
numbers
numeric
optional
ostream
queue
random
ratio
regex
scoped_allocator
semaphore
set
setjmp.h
shared_mutex
span
sstream
stack
stdbool.h
stddef.h
stdexcept
stdint.h
stdio.h
stdlib.h
streambuf
string
string.h
string_view
strstream
system_error
tgmath.h
thread
tuple
type_traits
typeindex
typeinfo
unordered_map
unordered_set
utility
valarray
variant
vector
version
wchar.h
wctype.h
)
if(LIBCXX_INSTALL_SUPPORT_HEADERS)
set(files
${files}
support/android/locale_bionic.h
support/fuchsia/xlocale.h
support/ibm/limits.h
support/ibm/locale_mgmt_aix.h
support/ibm/support.h
support/ibm/xlocale.h
support/musl/xlocale.h
support/newlib/xlocale.h
support/solaris/floatingpoint.h
support/solaris/wchar.h
support/solaris/xlocale.h
support/win32/limits_msvc_win32.h
support/win32/locale_win32.h
support/xlocale/__nop_locale_mgmt.h
support/xlocale/__posix_l_fallback.h
support/xlocale/__strtonum_fallback.h
)
endif()
configure_file("__config_site.in"
"${LIBCXX_BINARY_DIR}/__config_site"
@ONLY)
# Generate a custom __config header. The new header is created
# by prepending __config_site to the current __config header.
add_custom_command(OUTPUT ${LIBCXX_BINARY_DIR}/__generated_config
COMMAND ${Python3_EXECUTABLE} ${LIBCXX_SOURCE_DIR}/utils/cat_files.py
${LIBCXX_BINARY_DIR}/__config_site
${LIBCXX_SOURCE_DIR}/include/__config
-o ${LIBCXX_BINARY_DIR}/__generated_config
DEPENDS ${LIBCXX_SOURCE_DIR}/include/__config
${LIBCXX_BINARY_DIR}/__config_site
)
# Add a target that executes the generation commands.
add_custom_target(cxx-generated-config ALL
DEPENDS ${LIBCXX_BINARY_DIR}/__generated_config)
if(LIBCXX_HEADER_DIR)
set(output_dir ${LIBCXX_HEADER_DIR}/include/c++/v1)
set(out_files)
foreach(f ${files})
set(src ${CMAKE_CURRENT_SOURCE_DIR}/${f})
set(dst ${output_dir}/${f})
add_custom_command(OUTPUT ${dst}
DEPENDS ${src}
COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
COMMENT "Copying CXX header ${f}")
list(APPEND out_files ${dst})
endforeach()
# Copy the generated header as __config into build directory.
set(src ${LIBCXX_BINARY_DIR}/__generated_config)
set(dst ${output_dir}/__config)
add_custom_command(OUTPUT ${dst}
DEPENDS ${src} cxx-generated-config
COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
COMMENT "Copying CXX __config")
list(APPEND out_files ${dst})
add_custom_target(generate-cxx-headers DEPENDS ${out_files})
add_library(cxx-headers INTERFACE)
add_dependencies(cxx-headers generate-cxx-headers ${LIBCXX_CXX_ABI_HEADER_TARGET})
# TODO: Use target_include_directories once we figure out why that breaks the runtimes build
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
target_compile_options(cxx-headers INTERFACE /I "${output_dir}")
else()
target_compile_options(cxx-headers INTERFACE -I "${output_dir}")
endif()
# Make sure the generated __config_site header is included when we build the library.
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC" OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
target_compile_options(cxx-headers INTERFACE /FI "${LIBCXX_BINARY_DIR}/__config_site")
else()
target_compile_options(cxx-headers INTERFACE -include "${LIBCXX_BINARY_DIR}/__config_site")
endif()
else()
add_library(cxx-headers INTERFACE)
endif()
if (LIBCXX_INSTALL_HEADERS)
foreach(file ${files})
get_filename_component(dir ${file} DIRECTORY)
install(FILES ${file}
DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1/${dir}
COMPONENT cxx-headers
PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
)
endforeach()
# Install the generated header as __config.
install(FILES ${LIBCXX_BINARY_DIR}/__generated_config
[libc++] Always generate a __config_site header Before this patch, the __config_site header was only generated when at least one __config_site macro needed to be defined. This lead to two different code paths in how libc++ is configured, depending on whether a __config_site header was generated or not. After this patch, the __config_site is always generated, but it can be empty in case there are no macros to define in it. More context on why this change is important -------------------------------------------- In addition to being confusing, this double-code-path situation lead to broken code being checked in undetected in 2405bd689815, which introduced the LIBCXX_HAS_MERGED_TYPEINFO_NAMES_DEFAULT CMake setting. Specifically, the _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT <__config_site> macro was supposed NOT to be defined unless LIBCXX_HAS_MERGED_TYPEINFO_NAMES_DEFAULT was specified explicitly on the CMake command line. Instead, what happened is that it was defined to 0 if it wasn't specified explicitly and a <__config_site> header was generated. And defining that macro to 0 had the important effect of using the non-unique RTTI comparison implementation, which changes the ABI. This change in behavior wasn't noticed because the <__config_site> header is not generated by default. However, the Apple configuration does cause a <__config_site> header to be generated, which lead to the wrong RTTI implementation being used, and to https://llvm.org/PR45549. We came close to an ABI break in the dylib, but were saved due to a downstream-only change that overrode the decision of the <__config_site> for the purpose of RTTI comparisons in libc++abi. This is an incredible luck that we should not rely on ever again. While the problem itself was fixed with 2464d8135e2a by setting LIBCXX_HAS_MERGED_TYPEINFO_NAMES_DEFAULT explicitly in the Apple CMake cache and then in d0fcdcd28f95 by making the setting less brittle, the point still is that we should have had a single code path from the beginning. Unlike most normal libraries, the macros that configure libc++ are really complex, there's a lot of them and they control important properties of the C++ runtime. There must be a single code path for that, and it must be simple and robust. Differential Revision: https://reviews.llvm.org/D80927
2020-05-16 02:54:27 +08:00
DESTINATION ${LIBCXX_INSTALL_HEADER_PREFIX}include/c++/v1
PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
RENAME __config
COMPONENT cxx-headers)
if (NOT CMAKE_CONFIGURATION_TYPES)
add_custom_target(install-cxx-headers
DEPENDS cxx-headers cxx-generated-config
COMMAND "${CMAKE_COMMAND}"
-DCMAKE_INSTALL_COMPONENT=cxx-headers
-P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
# Stripping is a no-op for headers
add_custom_target(install-cxx-headers-stripped DEPENDS install-cxx-headers)
endif()
endif()