# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Some additional configuration options.
option(MSVC_ENABLE_ALL_WARNINGS "If enabled, pass /Wall to the compiler." ON)
option(MSVC_ENABLE_DEBUG_INLINING "If enabled, enable inlining in the debug configuration. This allows /Zc:inline to be far more effective." OFF)
option(MSVC_ENABLE_FAST_LINK "If enabled, pass /DEBUG:FASTLINK to the linker. This makes linking faster, but the gtest integration for Visual Studio can't currently handle the .pdbs generated." OFF)
option(MSVC_ENABLE_LEAN_AND_MEAN_WINDOWS "If enabled, define WIN32_LEAN_AND_MEAN to include a smaller subset of Windows.h" ON)
option(MSVC_ENABLE_LTCG "If enabled, use Link Time Code Generation for Release builds." OFF)
option(MSVC_ENABLE_PARALLEL_BUILD "If enabled, build multiple source files in parallel." ON)
option(MSVC_ENABLE_STATIC_ANALYSIS "If enabled, do more complex static analysis and generate warnings appropriately." OFF)
option(MSVC_USE_STATIC_RUNTIME "If enabled, build against the static, rather than the dynamic, runtime." OFF)
option(MSVC_SUPPRESS_BOOST_CONFIG_OUTDATED "If enabled, suppress Boost's warnings about the config being out of date." ON)
# Alas, option() doesn't support string values.
set(MSVC_FAVORED_ARCHITECTURE "blend" CACHE STRING "One of 'blend', 'AMD64', 'INTEL64', or 'ATOM'. This tells the compiler to generate code optimized to run best on the specified architecture.")
# Add a pretty drop-down selector for these values when using the GUI.
set_property(
CACHE MSVC_FAVORED_ARCHITECTURE
PROPERTY STRINGS
blend
AMD64
ATOM
INTEL64
)
# Validate, and then add the favored architecture.
if (NOT MSVC_FAVORED_ARCHITECTURE STREQUAL "blend" AND NOT MSVC_FAVORED_ARCHITECTURE STREQUAL "AMD64" AND NOT MSVC_FAVORED_ARCHITECTURE STREQUAL "INTEL64" AND NOT MSVC_FAVORED_ARCHITECTURE STREQUAL "ATOM")
message(FATAL_ERROR "MSVC_FAVORED_ARCHITECTURE must be set to one of exactly, 'blend', 'AMD64', 'INTEL64', or 'ATOM'! Got '${MSVC_FAVORED_ARCHITECTURE}' instead!")
endif()
set(MSVC_LANGUAGE_VERSION "c++17" CACHE STRING "One of 'c++17', or 'c++latest'. This determines which version of C++ to compile as.")
set_property(
CACHE MSVC_LANGUAGE_VERSION
PROPERTY STRINGS
"c++17"
"c++latest"
)
############################################################
# We need to adjust a couple of the default option sets.
############################################################
# If the static runtime is requested, we have to
# overwrite some of CMake's defaults.
if (MSVC_USE_STATIC_RUNTIME)
foreach(flag_var
CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if (${flag_var} MATCHES "/MD")
string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
endif()
endforeach()
endif()
# The Ninja generator doesn't de-dup the exception mode flag, so remove the
# default flag so that MSVC doesn't warn about it on every single file.
if ("${CMAKE_GENERATOR}" STREQUAL "Ninja")
foreach(flag_var
CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if (${flag_var} MATCHES "/EHsc")
string(REGEX REPLACE "/EHsc" "" ${flag_var} "${${flag_var}}")
endif()
endforeach()
endif()
# In order for /Zc:inline, which speeds up the build significantly, to work
# we need to remove the /Ob0 parameter that CMake adds by default, because that
# would normally disable all inlining.
foreach(flag_var CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG)
if (${flag_var} MATCHES "/Ob0")
string(REGEX REPLACE "/Ob0" "" ${flag_var} "${${flag_var}}")
endif()
endforeach()
# When building with Ninja, or with /MP enabled, there is the potential
# for multiple processes to need to lock the same pdb file.
# The /FS option (which is implicitly enabled by /MP) is widely believed
# to be the solution for this, but even with /FS enabled the problem can
# still randomly occur.
# https://stackoverflow.com/a/58020501/149111 suggests that /Z7 should be
# used; rather than placing the debug info into a .pdb file it embeds it
# into the object files in a similar way to gcc/clang which should reduce
# contention and potentially make the build faster... but at the cost of
# larger object files
foreach(flag_var CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG)
if (${flag_var} MATCHES "/Zi")
string(REGEX REPLACE "/Zi" "/Z7" ${flag_var} "${${flag_var}}")
endif()
endforeach()
# Apply the option set for Folly to the specified target.
function(apply_folly_compile_options_to_target THETARGET)
# The general options passed:
target_compile_options(${THETARGET}
PUBLIC
/EHs # Don't catch structured exceptions with catch (...)
/GF # There are bugs with constexpr StringPiece when string pooling is disabled.
/Zc:referenceBinding # Disallow temporaries from binding to non-const lvalue references.
/Zc:rvalueCast # Enforce the standard rules for explicit type conversion.
/Zc:implicitNoexcept # Enable implicit noexcept specifications where required, such as destructors.
/Zc:strictStrings # Don't allow conversion from a string literal to mutable characters.
/Zc:threadSafeInit # Enable thread-safe function-local statics initialization.
/Zc:throwingNew # Assume operator new throws on failure.
/permissive- # Be mean, don't allow bad non-standard stuff (C++/CLI, __declspec, etc. are all left intact).
/std:${MSVC_LANGUAGE_VERSION} # Build in the requested version of C++
PRIVATE
/bigobj # Support objects with > 65k sections. Needed due to templates.
/favor:${MSVC_FAVORED_ARCHITECTURE} # Architecture to prefer when generating code.
/Zc:inline # Have the compiler eliminate unreferenced COMDAT functions and data before emitting the object file.
$<$<BOOL:${MSVC_ENABLE_ALL_WARNINGS}>:/Wall> # Enable all warnings if requested.
$<$<BOOL:${MSVC_ENABLE_PARALLEL_BUILD}>:/MP> # Enable multi-processor compilation if requested.
$<$<BOOL:${MSVC_ENABLE_STATIC_ANALYSIS}>:/analyze> # Enable static analysis if requested.
# Debug builds
$<$<CONFIG:DEBUG>:
/Gy- # Disable function level linking.
$<$<BOOL:${MSVC_ENABLE_DEBUG_INLINING}>:/Ob2> # Add /Ob2 if allowing inlining in debug mode.
>
# Non-debug builds
$<$<NOT:$<CONFIG:DEBUG>>:
/Gw # Optimize global data. (-fdata-sections)
/Gy # Enable function level linking. (-ffunction-sections)
/Qpar # Enable parallel code generation.
/Oi # Enable intrinsic functions.
/Ot # Favor fast code.
$<$<BOOL:${MSVC_ENABLE_LTCG}>:/GL> # Enable link time code generation.
>
)
target_compile_options(${THETARGET}
PUBLIC
/wd4191 # 'type cast' unsafe conversion of function pointers
/wd4291 # no matching operator delete found
/wd4309 # '=' truncation of constant value
/wd4310 # cast truncates constant value
/wd4366 # result of unary '&' operator may be unaligned
/wd4587 # behavior change; constructor no longer implicitly called
/wd4592 # symbol will be dynamically initialized (implementation limitation)
/wd4628 # digraphs not supported with -Ze
/wd4723 # potential divide by 0
/wd4724 # potential mod by 0
/wd4868 # compiler may not enforce left-to-right evaluation order
/wd4996 # user deprecated
# The warnings that are disabled:
/wd4068 # Unknown pragma.
/wd4091 # 'typedef' ignored on left of '' when no variable is declared.
/wd4146 # Unary minus applied to unsigned type, result still unsigned.
/wd4800 # Values being forced to bool, this happens many places, and is a "performance warning".
# NOTE: glog/logging.h:1116 change to `size_t pcount() const { return size_t(pptr() - pbase()); }`
# NOTE: gmock/gmock-spec-builders.h:1177 change to `*static_cast<const Action<F>*>(untyped_actions_[size_t(count - 1)]) :`
# NOTE: gmock/gmock-spec-builders.h:1749 change to `const size_t count = untyped_expectations_.size();`
# NOTE: gmock/gmock-spec-builders.h:1754 change to `for (size_t i = 0; i < count; i++) {`
# NOTE: gtest/gtest-printers.h:173 change to `const internal::BiggestInt kBigInt = internal::BiggestInt(value);`
# NOTE: gtest/internal/gtest-internal.h:890 add `GTEST_DISABLE_MSC_WARNINGS_PUSH_(4365)`
# NOTE: gtest/internal/gtest-internal.h:894 ass `GTEST_DISABLE_MSC_WARNINGS_POP_()`
# NOTE: boost/crc.hpp:578 change to `{ return static_cast<unsigned char>(x ^ rem); }`
# NOTE: boost/regex/v4/match_results.hpp:126 change to `return m_subs[size_type(sub)].length();`
# NOTE: boost/regex/v4/match_results.hpp:226 change to `return m_subs[size_type(sub)];`
# NOTE: boost/date_time/adjust_functors.hpp:67 change to `origDayOfMonth_ = short(ymd.day);`
# NOTE: boost/date_time/adjust_functors.hpp:75 change to `wrap_int2 wi(short(ymd.month));`
# NOTE: boost/date_time/adjust_functors.hpp:82 change to `day_type resultingEndOfMonthDay(cal_type::end_of_month_day(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int())));`
# NOTE: boost/date_time/adjust_functors.hpp:85 change to `return date_type(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int()), resultingEndOfMonthDay) - d;`
# NOTE: boost/date_time/adjust_functors.hpp:87 change to `day_type dayOfMonth = static_cast<unsigned short>(origDayOfMonth_);`
# NOTE: boost/date_time/adjust_functors.hpp:91 change to `return date_type(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int()), dayOfMonth) - d;`
# NOTE: boost/date_time/adjust_functors.hpp:98 change to `origDayOfMonth_ = short(ymd.day);`
# NOTE: boost/date_time/adjust_functors.hpp:106 change to `wrap_int2 wi(short(ymd.month));`
# NOTE: boost/date_time/adjust_functors.hpp:111 change to `day_type resultingEndOfMonthDay(cal_type::end_of_month_day(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int())));`
# NOTE: boost/date_time/adjust_functors.hpp:114 change to `return date_type(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int()), resultingEndOfMonthDay) - d;`
# NOTE: boost/date_time/adjust_functors.hpp:116 change to `day_type dayOfMonth = static_cast<unsigned short>(origDayOfMonth_);`
# NOTE: boost/date_time/adjust_functors.hpp:120 change to `return date_type(static_cast<unsigned short>(year), static_cast<unsigned short>(wi.as_int()), dayOfMonth) - d;`
# NOTE: boost/date_time/gregorian_calendar.ipp:81 change to `unsigned long d = static_cast<unsigned long>(ymd.day + ((153*m + 2)/5) + 365*y + (y/4) - (y/100) + (y/400) - 32045);`
# NOTE: boost/date_time/gregorian/greg_date.hpp:122 change to `unsigned short eom_day = gregorian_calendar::end_of_month_day(ymd.year, ymd.month);`
# NOTE: boost/thread/future.hpp:1050 change to `locks[std::ptrdiff_t(i)]=BOOST_THREAD_MAKE_RV_REF(boost::unique_lock<boost::mutex>(futures[i].future_->mutex));`
# NOTE: boost/thread/future.hpp:1063 change to `locks[std::ptrdiff_t(i)].unlock();`
# NOTE: boost/thread/win32/basic_recursive_mutex.hpp:47 change to `long const current_thread_id=long(win32::GetCurrentThreadId());`
# NOTE: boost/thread/win32/basic_recursive_mutex.hpp:53 change to `long const current_thread_id=long(win32::GetCurrentThreadId());`
# NOTE: boost/thread/win32/basic_recursive_mutex.hpp:64 change to `long const current_thread_id=long(win32::GetCurrentThreadId());`
# NOTE: boost/thread/win32/basic_recursive_mutex.hpp:78 change to `long const current_thread_id=long(win32::GetCurrentThreadId());`
# NOTE: boost/thread/win32/basic_recursive_mutex.hpp:84 change to `long const current_thread_id=long(win32::GetCurrentThreadId());`
# NOTE: boost/thread/win32/condition_variable.hpp:79 change to `detail::win32::ReleaseSemaphore(semaphore,long(count_to_release),0);`
# NOTE: boost/thread/win32/condition_variable.hpp:84 change to `release(unsigned(detail::interlocked_read_acquire(&waiters)));`
# NOTE: boost/algorithm/string/detail/classification.hpp:85 change to `std::size_t Size=std::size_t(::boost::distance(Range));`
/wd4018 # Signed/unsigned mismatch.
/wd4365 # Signed/unsigned mismatch.
/wd4388 # Signed/unsigned mismatch on relative comparison operator.
/wd4389 # Signed/unsigned mismatch on equality comparison operator.
# TODO:
/wd4100 # Unreferenced formal parameter.
/wd4459 # Declaration of parameter hides global declaration.
/wd4505 # Unreferenced local function has been removed.
/wd4701 # Potentially uninitialized local variable used.
/wd4702 # Unreachable code.
# These warnings are disabled because we've
# enabled all warnings. If all warnings are
# not enabled, we still need to disable them
# for consuming libs.
/wd4061 # Enum value not handled by a case in a switch on an enum. This isn't very helpful because it is produced even if a default statement is present.
/wd4127 # Conditional expression is constant.
/wd4200 # Non-standard extension, zero sized array.
/wd4201 # Non-standard extension used: nameless struct/union.
/wd4296 # '<' Expression is always false.
/wd4316 # Object allocated on the heap may not be aligned to 128.
/wd4324 # Structure was padded due to alignment specifier.
/wd4355 # 'this' used in base member initializer list.
/wd4371 # Layout of class may have changed due to fixes in packing.
/wd4435 # Object layout under /vd2 will change due to virtual base.
/wd4514 # Unreferenced inline function has been removed. (caused by /Zc:inline)
/wd4548 # Expression before comma has no effect. I wouldn't disable this normally, but malloc.h triggers this warning.
/wd4571 # Semantics of catch(...) changed in VC 7.1
/wd4574 # ifdef'd macro was defined to 0.
/wd4582 # Constructor is not implicitly called.
/wd4583 # Destructor is not implicitly called.
/wd4619 # Invalid warning number used in #pragma warning.
/wd4623 # Default constructor was implicitly defined as deleted.
/wd4625 # Copy constructor was implicitly defined as deleted.
/wd4626 # Assignment operator was implicitly defined as deleted.
/wd4643 # Forward declaring standard library types is not permitted.
/wd4647 # Behavior change in __is_pod.
/wd4668 # Macro was not defined, replacing with 0.
/wd4706 # Assignment within conditional expression.
/wd4710 # Function was not inlined.
/wd4711 # Function was selected for automated inlining.
/wd4714 # Function marked as __forceinline not inlined.
/wd4820 # Padding added after data member.
/wd5026 # Move constructor was implicitly defined as deleted.
/wd5027 # Move assignment operator was implicitly defined as deleted.
/wd5031 # #pragma warning(pop): likely mismatch, popping warning state pushed in different file. This is needed because of how boost does things.
/wd5045 # Compiler will insert Spectre mitigation for memory load if /Qspectre switch is specified.
# Warnings to treat as errors:
/we4099 # Mixed use of struct and class on same type names.
/we4129 # Unknown escape sequence. This is usually caused by incorrect escaping.
/we4566 # Character cannot be represented in current charset. This is remidied by prefixing string with "u8".
PRIVATE
# Warnings disabled for /analyze
$<$<BOOL:${MSVC_ENABLE_STATIC_ANALYSIS}>:
/wd6001 # Using uninitialized memory. This is disabled because it is wrong 99% of the time.
/wd6011 # Dereferencing potentially NULL pointer.
/wd6031 # Return value ignored.
/wd6235 # (<non-zero constant> || <expression>) is always a non-zero constant.
/wd6237 # (<zero> && <expression>) is always zero. <expression> is never evaluated and may have side effects.
/wd6239 # (<non-zero constant> && <expression>) always evaluates to the result of <expression>.
/wd6240 # (<expression> && <non-zero constant>) always evaluates to the result of <expression>.
/wd6246 # Local declaration hides declaration of same name in outer scope.
/wd6248 # Setting a SECURITY_DESCRIPTOR's DACL to NULL will result in an unprotected object. This is done by one of the boost headers.
/wd6255 # _alloca indicates failure by raising a stack overflow exception.
/wd6262 # Function uses more than x bytes of stack space.
/wd6271 # Extra parameter passed to format function. The analysis pass doesn't recognize %j or %z, even though the runtime does.
/wd6285 # (<non-zero constant> || <non-zero constant>) is always true.
/wd6297 # 32-bit value is shifted then cast to 64-bits. The places this occurs never use more than 32 bits.
/wd6308 # Realloc might return null pointer: assigning null pointer to '<name>', which is passed as an argument to 'realloc', will cause the original memory to leak.
/wd6326 # Potential comparison of a constant with another constant.
/wd6330 # Unsigned/signed mismatch when passed as a parameter.
/wd6340 # Mismatch on sign when passed as format string value.
/wd6387 # '<value>' could be '0': This does not adhere to the specification for a function.
/wd28182 # Dereferencing NULL pointer. '<value>' contains the same NULL value as '<expression>'.
/wd28251 # Inconsistent annotation for function. This is because we only annotate the declaration and not the definition.
/wd28278 # Function appears with no prototype in scope.
>
)
# And the extra defines:
target_compile_definitions(${THETARGET}
PUBLIC
_CRT_NONSTDC_NO_WARNINGS # Don't deprecate posix names of functions.
_CRT_SECURE_NO_WARNINGS # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
_SCL_SECURE_NO_WARNINGS # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
_ENABLE_EXTENDED_ALIGNED_STORAGE #A type with an extended alignment in VS 15.8 or later
_STL_EXTRA_DISABLED_WARNINGS=4774\ 4987
$<$<BOOL:${MSVC_ENABLE_CPP_LATEST}>:_HAS_AUTO_PTR_ETC=1> # We're building in C++ 17 or greater mode, but certain dependencies (Boost) still have dependencies on unary_function and binary_function, so we have to make sure not to remove them.
$<$<BOOL:${MSVC_ENABLE_LEAN_AND_MEAN_WINDOWS}>:WIN32_LEAN_AND_MEAN> # Don't include most of Windows.h
$<$<BOOL:${MSVC_SUPPRESS_BOOST_CONFIG_OUTDATED}>:BOOST_CONFIG_SUPPRESS_OUTDATED_MESSAGE> # MSVC moves faster than boost, so add a quick way to disable the messages.
)
# Ignore a warning about an object file not defining any symbols,
# these are known, and we don't care.
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY STATIC_LIBRARY_FLAGS " /ignore:4221")
# The options to pass to the linker:
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_DEBUG " /INCREMENTAL") # Do incremental linking.
if (NOT $<TARGET_PROPERTY:${THETARGET},TYPE> STREQUAL "STATIC_LIBRARY")
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_DEBUG " /OPT:NOREF") # No unreferenced data elimination.
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_DEBUG " /OPT:NOICF") # No Identical COMDAT folding.
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /OPT:REF") # Remove unreferenced functions and data.
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /OPT:ICF") # Identical COMDAT folding.
endif()
if (MSVC_ENABLE_FAST_LINK)
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_DEBUG " /DEBUG:FASTLINK") # Generate a partial PDB file that simply references the original object and library files.
endif()
# Add /GL to the compiler, and /LTCG to the linker
# if link time code generation is enabled.
if (MSVC_ENABLE_LTCG)
set_property(TARGET ${THETARGET} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE " /LTCG")
endif()
endfunction()
list(APPEND FOLLY_LINK_LIBRARIES Iphlpapi.lib Ws2_32.lib)
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