2 if("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD")
6 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
10 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
14 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Windows")
18 # Do this until cmake has a define for ARMv8
19 INCLUDE(CheckCXXSourceCompiles)
20 CHECK_CXX_SOURCE_COMPILES("
24 int main() { return 0; }" IS_X64)
26 CHECK_CXX_SOURCE_COMPILES("
30 int main() { return 0; }" IS_AARCH64)
32 CHECK_CXX_SOURCE_COMPILES("
36 int main() { return 0; }" IS_PPC64)
39 if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
40 # Warnings to disable by name, -Wno-${name}
41 set(DISABLED_NAMED_WARNINGS)
42 list(APPEND DISABLED_NAMED_WARNINGS
51 "unused-local-typedefs"
56 # Warnings to disable by name when building C code.
57 set(DISABLED_C_NAMED_WARNINGS)
58 list(APPEND DISABLED_C_NAMED_WARNINGS
59 "missing-field-initializers"
63 # General options to pass to both C & C++ compilers
66 # General options to pass to the C++ compiler
67 set(GENERAL_CXX_OPTIONS)
68 list(APPEND GENERAL_CXX_OPTIONS
70 "fno-omit-frame-pointer"
74 "Werror=format-security"
77 # Options to pass for debug mode to the C++ compiler
78 set(DEBUG_CXX_OPTIONS)
80 # Options to pass for release mode to the C++ compiler
81 set(RELEASE_CXX_OPTIONS)
83 # Suboption of -g in debug mode
86 # Enable GCC/LLVM stack-smashing protection
88 list(APPEND GENERAL_OPTIONS
89 # This needs two dashes in the name, so put one here.
90 "-param=ssp-buffer-size=4"
96 if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang") # using Clang
98 list(APPEND GENERAL_OPTIONS
99 # For unclear reasons, our detection for what crc32 intrinsics you have
100 # will cause clang to ICE. Specifying a baseline here works around the
101 # issue. (SSE4.2 has been available on processors for quite some time now.)
104 # Also need to pass the right option to ASM files to avoid inconsistencies
105 # in CRC hash function handling
106 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -msse4.2")
109 list(APPEND GENERAL_CXX_OPTIONS
112 list(APPEND DISABLED_C_NAMED_WARNINGS
113 "unused-command-line-argument"
115 list(APPEND DISABLED_NAMED_WARNINGS
116 "return-type-c-linkage"
117 "unknown-warning-option"
118 "unused-command-line-argument"
121 # Enabled GCC/LLVM stack-smashing protection
123 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 3.6 OR
124 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 3.6)
125 list(APPEND GENERAL_OPTIONS "fstack-protector-strong")
127 list(APPEND GENERAL_OPTIONS "fstack-protector")
131 if(CLANG_FORCE_LIBSTDCXX)
132 list(APPEND GENERAL_CXX_OPTIONS "stdlib=libstdc++")
134 list(APPEND GENERAL_CXX_OPTIONS "stdlib=libc++")
137 list(APPEND DISABLED_NAMED_WARNINGS
138 "deprecated-declarations"
139 "maybe-uninitialized"
141 list(APPEND DISABLED_C_NAMED_WARNINGS
142 "maybe-uninitialized"
143 "old-style-declaration"
145 list(APPEND GENERAL_OPTIONS
148 list(APPEND GENERAL_CXX_OPTIONS
151 "fno-canonical-system-headers"
154 list(APPEND RELEASE_CXX_OPTIONS
155 "-param max-inline-insns-auto=100"
156 "-param early-inlining-insns=200"
157 "-param max-early-inliner-iterations=50"
158 "-param=inline-unit-growth=200"
159 "-param=large-unit-insns=10000"
162 # Fix problem with GCC 4.9, https://kb.isc.org/article/AA-01167
163 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9 OR
164 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.9)
165 list(APPEND GENERAL_OPTIONS "fno-delete-null-pointer-checks")
167 message(FATAL_ERROR "${PROJECT_NAME} requires g++ 4.9 or greater.")
170 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 6.0 OR
171 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 6.0)
172 message(WARNING "HHVM is primarily tested on GCC 4.9 and 5. Using other versions may produce unexpected results, or may not even build at all.")
175 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5.1 OR
176 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5.1)
177 list(APPEND DISABLED_NAMED_WARNINGS "bool-compare")
178 list(APPEND GENERAL_OPTIONS "DFOLLY_HAVE_MALLOC_H")
181 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 6.0 OR
182 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 6.0)
183 list(APPEND GENERAL_CXX_OPTIONS "Wno-misleading-indentation")
186 # Enabled GCC/LLVM stack-smashing protection
188 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.8 OR
189 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.8)
191 # https://isisblogs.poly.edu/2011/06/01/relro-relocation-read-only/
192 list(APPEND GENERAL_OPTIONS "Wl,-z,relro,-z,now")
194 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9 OR
195 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.9)
196 list(APPEND GENERAL_OPTIONS "fstack-protector-strong")
199 list(APPEND GENERAL_OPTIONS "fstack-protector")
205 list(APPEND GENERAL_CXX_OPTIONS "mcrc32")
210 # Force char type to be signed, which is not the case on aarch64.
211 list(APPEND GENERAL_OPTIONS "fsigned-char")
213 # If a CPU was specified, build a -mcpu option for the compiler.
214 set(AARCH64_TARGET_CPU "" CACHE STRING "CPU to tell gcc to optimize for (-mcpu)")
215 if(AARCH64_TARGET_CPU)
216 list(APPEND GENERAL_OPTIONS "mcpu=${AARCH64_TARGET_CPU}")
217 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mcpu=${AARCH64_TARGET_CPU}")
219 # Make sure GCC is not using the fix for errata 843419. This change
220 # interferes with the gold linker. Note that GCC applies this fix
221 # even if you specify an mcpu other than cortex-a53, which is why
222 # it's explicitly being disabled here for any cpu other than
223 # cortex-a53. If you're running a newer pass of the cortex-a53, then
224 # you can likely disable this fix with the following flag too. YMMV
225 if(NOT ${AARCH64_TARGET_CPU} STREQUAL "cortex-a53")
226 list(APPEND GENERAL_OPTIONS "mno-fix-cortex-a53-843419")
233 list(APPEND RELEASE_CXX_OPTIONS "momit-leaf-frame-pointer")
237 set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
240 if (ENABLE_SPLIT_DWARF)
241 set(GDB_SUBOPTION "split-dwarf")
245 # No optimizations for debug builds.
246 # -Og enables some optimizations, but makes debugging harder by optimizing
247 # away some functions and locals. -O0 is more debuggable.
248 # -O0-ggdb was reputed to cause gdb to crash (github #4450)
249 set(CMAKE_C_FLAGS_DEBUG "-O0 -g${GDB_SUBOPTION}")
250 set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g${GDB_SUBOPTION}")
251 set(CMAKE_C_FLAGS_DEBUGOPT "-O2 -g${GDB_SUBOPTION}")
252 set(CMAKE_CXX_FLAGS_DEBUGOPT "-O2 -g${GDB_SUBOPTION}")
253 set(CMAKE_C_FLAGS_MINSIZEREL "-Os -DNDEBUG")
254 set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os -DNDEBUG")
255 set(CMAKE_C_FLAGS_RELEASE "-O3 -DNDEBUG")
256 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG")
257 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -g${GDB_SUBOPTION} -DNDEBUG")
258 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g${GDB_SUBOPTION} -DNDEBUG")
259 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -W -Werror=implicit-function-declaration")
261 mark_as_advanced(CMAKE_C_FLAGS_DEBUGOPT CMAKE_CXX_FLAGS_DEBUGOPT)
263 foreach(opt ${DISABLED_NAMED_WARNINGS})
264 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-${opt}")
267 foreach(opt ${DISABLED_C_NAMED_WARNINGS})
268 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-${opt}")
271 foreach(opt ${GENERAL_OPTIONS})
272 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -${opt}")
273 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -${opt}")
276 foreach(opt ${GENERAL_CXX_OPTIONS})
277 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -${opt}")
280 foreach(opt ${DEBUG_CXX_OPTIONS})
281 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -${opt}")
284 foreach(opt ${RELEASE_CXX_OPTIONS})
285 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -${opt}")
288 # The ASM part of this makes it more effort than it's worth
289 # to add these to the general flags system.
291 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mavx2 -march=core-avx2")
292 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx2 -march=core-avx2")
293 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mavx2 -march=core-avx2")
296 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
297 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -no-ipo -fp-model precise -wd584 -wd1418 -wd1918 -wd383 -wd869 -wd981 -wd424 -wd1419 -wd444 -wd271 -wd2259 -wd1572 -wd1599 -wd82 -wd177 -wd593 -w")
298 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -no-ipo -fp-model precise -wd584 -wd1418 -wd1918 -wd383 -wd869 -wd981 -wd424 -wd1419 -wd444 -wd271 -wd2259 -wd1572 -wd1599 -wd82 -wd177 -wd593 -fno-omit-frame-pointer -Wall -Woverloaded-virtual -Wno-deprecated -w1 -Wno-strict-aliasing -Wno-write-strings -Wno-invalid-offsetof -fno-operator-names")
299 # using Visual Studio C++
300 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
301 message(WARNING "MSVC support is VERY experimental. It will likely not compile, and is intended for the utterly insane.")
303 ############################################################
304 # First we setup and account for the option sets.
305 ############################################################
307 set(MSVC_GENERAL_OPTIONS)
308 set(MSVC_DISABLED_WARNINGS)
309 set(MSVC_WARNINGS_AS_ERRORS)
310 set(MSVC_ADDITIONAL_DEFINES)
311 set(MSVC_EXE_LINKER_OPTIONS)
312 set(MSVC_DEBUG_OPTIONS)
313 set(MSVC_RELEASE_OPTIONS)
314 set(MSVC_RELEASE_LINKER_OPTIONS)
315 set(MSVC_DEBUG_EXE_LINKER_OPTIONS)
316 set(MSVC_RELEASE_EXE_LINKER_OPTIONS)
318 # Some addional configuration options.
319 set(MSVC_ENABLE_ALL_WARNINGS ON CACHE BOOL "If enabled, pass /Wall to the compiler.")
320 set(MSVC_ENABLE_DEBUG_INLINING ON CACHE BOOL "If enabled, enable inlining in the debug configuration. This allows /Zc:inline to be far more effective, resulting in hphp_runtime_static being ~450mb smaller.")
321 set(MSVC_ENABLE_LTCG OFF CACHE BOOL "If enabled, use Link Time Code Generation for Release builds.")
322 set(MSVC_ENABLE_PARALLEL_BUILD ON CACHE BOOL "If enabled, build multiple source files in parallel.")
323 set(MSVC_ENABLE_PCH ON CACHE BOOL "If enabled, use precompiled headers to speed up the build.")
324 set(MSVC_ENABLE_STATIC_ANALYSIS OFF CACHE BOOL "If enabled, do more complex static analysis and generate warnings appropriately.")
325 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.")
326 set(MSVC_NO_ASSERT_IN_DEBUG OFF CACHE BOOL "If enabled, don't do asserts in debug mode. The reduces the size of hphp_runtime_static by ~300mb.")
328 # The general options passed:
329 list(APPEND MSVC_GENERAL_OPTIONS
330 "bigobj" # Support objects with > 65k sections. Needed for folly due to templates.
331 "fp:precise" # Precise floating point model used in every other build, use it here as well.
332 "EHa" # Enable both SEH and C++ Exceptions.
333 "Oy-" # Disable elimination of stack frames.
334 "Zc:inline" # Have the compiler eliminate unreferenced COMDAT functions and data before emitting the object file. This produces significantly less input to the linker, resulting in MUCH faster linking.
335 "Zo" # Enable enhanced optimized debugging. Produces slightly larger pdb files, but the resulting optimized code is much much easier to debug.
338 # Enable all warnings if requested.
339 if (MSVC_ENABLE_ALL_WARNINGS)
340 list(APPEND MSVC_GENERAL_OPTIONS "Wall")
343 # Enable static analysis if requested.
344 if (MSVC_ENABLE_STATIC_ANALYSIS)
345 list(APPEND MSVC_GENERAL_OPTIONS "analyze")
348 # Enable multi-processor compilation if requested.
349 if (MSVC_ENABLE_PARALLEL_BUILD)
350 list(APPEND MSVC_GENERAL_OPTIONS "MP")
353 # Enable AVX2 codegen if available and requested.
355 list(APPEND MSVC_GENERAL_OPTIONS "arch:AVX2")
358 # Validate, and then add the favored architecture.
359 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")
360 message(FATAL_ERROR "MSVC_FAVORED_ARCHITECTURE must be set to one of exactly, 'blend', 'AMD64', 'INTEL64', or 'ATOM'! Got '${MSVC_FAVORED_ARCHITECTURE}' instead!")
362 list(APPEND MSVC_GENERAL_OPTIONS "favor:${MSVC_FAVORED_ARCHITECTURE}")
364 # The warnings that are disabled:
365 list(APPEND MSVC_DISABLED_WARNINGS
366 "4068" # Unknown pragma.
367 "4091" # 'typedef' ignored on left of '' when no variable is declared.
368 "4101" # Unused variables
369 "4103" # Alignment changed after including header. This is needed because boost includes an ABI header that does some #pragma pack push/pop stuff, and we've passed our own packing
370 "4146" # Unary minus applied to unsigned type, result still unsigned.
371 "4250" # Function was inherited via dominance.
372 "4800" # Values being forced to bool, this happens many places, and is a "performance warning".
375 if (MSVC_ENABLE_ALL_WARNINGS)
376 # These warnings are disabled because we've
377 # enabled all warnings. If all warnings are
378 # not enabled, then these don't need to be
380 list(APPEND MSVC_DISABLED_WARNINGS
381 "4061" # 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.
382 "4100" # Unreferenced formal parameter.
383 "4127" # Conditional expression is constant.
384 "4131" # Old style declarator used. This is triggered by ext_bc's backend code.
385 "4189" # Local variable is initialized but not referenced.
386 "4191" # Unsafe type cast.
387 "4200" # Non-standard extension, zero sized array.
388 "4201" # Non-standard extension used: nameless struct/union.
389 "4232" # Non-standard extension used: 'pCurrent': address of dllimport.
390 "4245" # Implicit change from signed/unsigned when initializing.
391 "4255" # Implicitly converting fucntion prototype from `()` to `(void)`.
392 "4265" # Class has virtual functions, but destructor is not virtual.
393 "4287" # Unsigned/negative constant mismatch.
394 "4296" # '<' Expression is always false.
395 "4315" # 'this' pointer for member may not be aligned to 8 bytes as expected by the constructor.
396 "4324" # Structure was padded due to alignment specifier.
397 "4355" # 'this' used in base member initializer list.
398 "4365" # Signed/unsigned mismatch.
399 "4371" # Layout of class may have changed due to fixes in packing.
400 "4388" # Signed/unsigned mismatch on relative comparison operator.
401 "4389" # Signed/unsigned mismatch on equality comparison operator.
402 "4435" # Object layout under /vd2 will change due to virtual base.
403 "4456" # Declaration of local hides previous definition of local by the same name.
404 "4457" # Declaration of local hides function parameter.
405 "4458" # Declaration of parameter hides class member.
406 "4459" # Declaration of parameter hides global declaration.
407 "4464" # Relative include path contains "..". This is triggered by the TBB headers.
408 "4505" # Unreferenced local function has been removed. This is mostly the result of things not being needed under MSVC.
409 "4514" # Unreferenced inline function has been removed. (caused by /Zc:inline)
410 "4548" # Expression before comma has no effect. I wouldn't disable this normally, but malloc.h triggers this warning.
411 "4555" # Expression has no effect; expected expression with side-effect. This is triggered by boost/variant.hpp.
412 "4574" # ifdef'd macro was defined to 0.
413 "4582" # Constructor is not implicitly called.
414 "4583" # Destructor is not implicitly called.
415 "4608" # Member has already been initialized by another union member initializer.
416 "4619" # Invalid warning number used in #pragma warning.
417 "4623" # Default constructor was implicitly defined as deleted.
418 "4625" # Copy constructor was implicitly defined as deleted.
419 "4626" # Assignment operator was implicitly defined as deleted.
420 "4647" # __is_pod() has a different value in pervious versions of MSVC.
421 "4668" # Macro was not defined, replacing with 0.
422 "4701" # Potentially uninitialized local variable used.
423 "4702" # Unreachable code.
424 "4706" # Assignment within conditional expression.
425 "4709" # Comma operator within array index expression. This currently just produces false-positives.
426 "4710" # Function was not inlined.
427 "4711" # Function was selected for automated inlining. This produces tens of thousands of warnings in release mode if you leave it enabled, which will completely break Visual Studio, so don't enable it.
428 "4714" # Function marked as __forceinline not inlined.
429 "4774" # Format string expected in argument is not a string literal.
430 "4820" # Padding added after data member.
431 "4917" # A GUID can only be associated with a class. This is triggered by some standard windows headers.
432 "4946" # reinterpret_cast used between related types.
433 "5026" # Move constructor was implicitly defined as deleted.
434 "5027" # Move assignment operator was implicitly defined as deleted.
435 "5031" # #pragma warning(pop): likely mismatch, popping warning state pushed in different file. This is needed because of how boost does things.
439 if (MSVC_ENABLE_STATIC_ANALYSIS)
440 # Warnings disabled for /analyze
441 list(APPEND MSVC_DISABLED_WARNINGS
442 "6001" # Using uninitialized memory. This is disabled because it is wrong 99% of the time.
443 "6011" # Dereferencing potentially NULL pointer.
444 "6031" # Return value ignored.
445 "6235" # (<non-zero constant> || <expression>) is always a non-zero constant.
446 "6237" # (<zero> && <expression>) is always zero. <expression> is never evaluated and may have side effects.
447 "6239" # (<non-zero constant> && <expression>) always evaluates to the result of <expression>.
448 "6240" # (<expression> && <non-zero constant>) always evaluates to the result of <expression>.
449 "6246" # Local declaration hides declaration of same name in outer scope.
450 "6248" # Setting a SECURITY_DESCRIPTOR's DACL to NULL will result in an unprotected object. This is done by one of the boost headers.
451 "6255" # _alloca indicates failure by raising a stack overflow exception.
452 "6262" # Function uses more than x bytes of stack space.
453 "6271" # Extra parameter passed to format function. The analysis pass doesn't recognize %j or %z, even though the runtime does.
454 "6285" # (<non-zero constant> || <non-zero constant>) is always true.
455 "6297" # 32-bit value is shifted then cast to 64-bits. The places this occurs never use more than 32 bits.
456 "6308" # 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.
457 "6326" # Potential comparison of a constant with another constant.
458 "6330" # Unsigned/signed mismatch when passed as a parameter.
459 "6340" # Mismatch on sign when passed as format string value.
460 "6387" # '<value>' could be '0': This does not adhere to the specification for a function.
461 "28182" # Dereferencing NULL pointer. '<value>' contains the same NULL value as '<expression>'.
462 "28251" # Inconsistent annotation for function. This is because we only annotate the declaration and not the definition.
463 "28278" # Function appears with no prototype in scope.
467 # Warnings disabled to keep it quiet for now,
468 # most of these should be reviewed and re-enabled:
469 list(APPEND MSVC_DISABLED_WARNINGS
470 "4005" # Macro redefinition
471 "4018" # Signed/unsigned mismatch.
472 "4242" # Possible loss of data when returning a value.
473 "4244" # Implicit truncation of data.
474 "4267" # Implicit truncation of data. This really shouldn't be disabled.
475 "4291" # No matching destructor found.
476 "4302" # Pointer casting size difference
477 "4311" # Pointer casting size difference
478 "4312" # Pointer casting size difference
479 "4477" # Parameter to a formatting function isn't the same type as was passed in the format string.
480 "4624" # Destructor was implicitly undefined.
481 "4804" # Unsafe use of type 'bool' in operation. (comparing if bool is <=> scalar)
482 "4805" # Unsafe mix of scalar type and type 'bool' in operation. (comparing if bool is == scalar)
485 # Warnings to treat as errors:
486 list(APPEND MSVC_WARNINGS_AS_ERRORS
487 "4099" # Mixed use of struct and class on same type names. This was absolutely everywhere, and can cause errors at link-time if not fixed.
488 "4129" # Unknown escape sequence. This is usually caused by incorrect escaping.
489 "4566" # Character cannot be represented in current charset. This is remidied by prefixing string with "u8".
492 # And the extra defines:
493 list(APPEND MSVC_ADDITIONAL_DEFINES
494 "NOMINMAX" # This is needed because, for some absurd reason, one of the windows headers tries to define "min" and "max" as macros, which messes up most uses of std::numeric_limits.
495 "_CRT_NONSTDC_NO_WARNINGS" # Don't deprecate posix names of functions.
496 "_CRT_SECURE_NO_WARNINGS" # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
497 "_SCL_SECURE_NO_WARNINGS" # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
498 "_WINSOCK_DEPRECATED_NO_WARNINGS" # Don't deprecate pieces of winsock
499 "YY_NO_UNISTD_H" # Because MSVC doesn't have unistd.h, which is requested by the YACC generated code.
502 # The options passed to the linker for EXE targets:
503 list(APPEND MSVC_EXE_LINKER_OPTIONS
504 "BASE:0x10000" # Base the program at just over 64k in memory, to play nice with the JIT.
505 "DYNAMICBASE:NO" # Don't randomize the base address.
506 "FIXED" # The program can only be loaded at its preferred base address.
507 "STACK:8388608,8388608" # Set the stack reserve,commit to 8mb. Reserve should probably be higher.
508 "time" # Output some timing information about the link.
511 # The options to pass to the compiler for debug builds:
512 list(APPEND MSVC_DEBUG_OPTIONS
513 "Gy-" # Disable function level linking.
514 "GF-" # Disable string pooling.
517 # Add /Ob2 if allowing inlining in debug mode:
518 if (MSVC_ENABLE_DEBUG_INLINING)
519 list(APPEND MSVC_DEBUG_OPTIONS "Ob2")
522 # The options to pass to the compiler for release builds:
523 list(APPEND MSVC_RELEASE_OPTIONS
524 "GF" # Enable string pooling. (this is enabled by default by the optimization level, but we enable it here for clarity)
525 "Gw" # Optimize global data. (-fdata-sections)
526 "Gy" # Enable function level linking. (-ffunction-sections)
527 "Qpar" # Enable parallel code generation. HHVM itself doesn't currently use this, but it's dependencies, TBB for instance, might, so enable it.
528 "Oi" # Enable intrinsic functions.
529 "Ot" # Favor fast code.
532 # Add /GL to the compiler, and /LTCG to the linker
533 # if link time code generation is enabled.
534 if (MSVC_ENABLE_LTCG)
535 list(APPEND MSVC_RELEASE_OPTIONS "GL")
536 list(APPEND MSVC_RELEASE_LINKER_OPTIONS "LTCG")
539 # The options to pass to the linker for debug builds for EXE targets:
540 list(APPEND MSVC_DEBUG_EXE_LINKER_OPTIONS
541 "OPT:NOREF" # No unreferenced data elimination. (well, mostly)
542 "OPT:NOICF" # No Identical COMDAT folding.
545 # The options to pass to the linker for release builds for EXE targets:
546 list(APPEND MSVC_RELEASE_EXE_LINKER_OPTIONS
547 "OPT:REF" # Remove unreferenced functions and data.
548 "OPT:ICF" # Identical COMDAT folding.
551 ############################################################
552 # Now we need to adjust a couple of the default option sets.
553 ############################################################
555 # We need the static runtime.
557 CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
558 CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
559 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
560 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
561 if (${flag_var} MATCHES "/MD")
562 string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
566 # In order for /Zc:inline, which speeds up the build significantly, to work
567 # we need to remove the /Ob0 parameter that CMake adds by default, because that
568 # would normally disable all inlining.
569 foreach(flag_var CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG)
570 if (${flag_var} MATCHES "/Ob0")
571 string(REGEX REPLACE "/Ob0" "" ${flag_var} "${${flag_var}}")
575 # Ignore a warning about an object file not defining any symbols,
576 # these are known, and we don't care.
577 set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
579 ############################################################
580 # And finally, we can set all the flags we've built up.
581 ############################################################
583 foreach(opt ${MSVC_GENERAL_OPTIONS})
584 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /${opt}")
585 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /${opt}")
588 foreach(opt ${MSVC_DISABLED_WARNINGS})
589 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd${opt}")
590 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd${opt}")
593 foreach(opt ${MSVC_WARNINGS_AS_ERRORS})
594 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /we${opt}")
595 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /we${opt}")
598 foreach(opt ${MSVC_ADDITIONAL_DEFINES})
599 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D ${opt}")
600 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D ${opt}")
603 foreach(opt ${MSVC_EXE_LINKER_OPTIONS})
604 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /${opt}")
607 foreach(opt ${MSVC_RELEASE_LINKER_OPTIONS})
609 CMAKE_EXE_LINKER_FLAGS_RELEASE CMAKE_EXE_LINKER_FLAGS_MINSIZEREL CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO
610 CMAKE_SHARED_LINKER_FLAGS_RELEASE CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO
611 CMAKE_STATIC_LINKER_FLAGS_RELEASE CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO)
612 set(${flag_var} "${${flag_var}} /${opt}")
616 foreach(opt ${MSVC_DEBUG_OPTIONS})
617 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /${opt}")
618 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /${opt}")
621 foreach(opt ${MSVC_RELEASE_OPTIONS})
623 CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
624 CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
625 set(${flag_var} "${${flag_var}} /${opt}")
629 foreach(opt ${MSVC_DEBUG_EXE_LINKER_OPTIONS})
630 set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /${opt}")
633 foreach(opt ${MSVC_RELEASE_EXE_LINKER_OPTIONS})
634 set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /${opt}")
635 set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /${opt}")
636 set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /${opt}")
639 message("Warning: unknown/unsupported compiler, things may go wrong")