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")
19 if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang" OR ${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
20 # Warnings to disable by name, -Wno-${name}
21 set(DISABLED_NAMED_WARNINGS)
22 list(APPEND DISABLED_NAMED_WARNINGS
35 # Warnings to disable by name when building C code.
36 set(DISABLED_C_NAMED_WARNINGS)
37 list(APPEND DISABLED_C_NAMED_WARNINGS
38 "missing-field-initializers"
42 # General options to pass to both C & C++ compilers
45 # General options to pass to the C++ compiler
46 set(GENERAL_CXX_OPTIONS)
47 list(APPEND GENERAL_CXX_OPTIONS
49 "fno-omit-frame-pointer"
53 "Werror=format-security"
56 # Options to pass for debug mode to the C++ compiler
57 set(DEBUG_CXX_OPTIONS)
59 # Options to pass for release mode to the C++ compiler
60 set(RELEASE_CXX_OPTIONS)
62 # Suboption of -g in debug mode
65 # Enable GCC/LLVM stack-smashing protection
67 list(APPEND GENERAL_OPTIONS
68 # This needs two dashes in the name, so put one here.
69 "-param=ssp-buffer-size=4"
75 if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Clang") # using Clang
76 list(APPEND GENERAL_OPTIONS
77 # For unclear reasons, our detection for what crc32 intrinsics you have
78 # will cause clang to ICE. Specifying a baseline here works around the
79 # issue. (SSE4.2 has been available on processors for quite some time now.)
82 # Also need to pass the right option to ASM files to avoid inconsistencies
83 # in CRC hash function handling
84 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -msse4.2")
85 list(APPEND GENERAL_CXX_OPTIONS
88 list(APPEND DISABLED_NAMED_WARNINGS
89 "unknown-warning-option"
90 "return-type-c-linkage"
93 # Enabled GCC/LLVM stack-smashing protection
95 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 3.6 OR
96 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 3.6)
97 list(APPEND GENERAL_OPTIONS "fstack-protector-strong")
99 list(APPEND GENERAL_OPTIONS "fstack-protector")
103 if(CLANG_FORCE_LIBSTDCXX)
104 list(APPEND GENERAL_CXX_OPTIONS "stdlib=libstdc++")
106 list(APPEND GENERAL_CXX_OPTIONS "stdlib=libc++")
109 list(APPEND DISABLED_NAMED_WARNINGS
110 "unused-local-typedefs"
111 "deprecated-declarations"
114 list(APPEND DISABLED_C_NAMED_WARNINGS
115 "old-style-declaration"
117 list(APPEND GENERAL_CXX_OPTIONS
121 "fno-canonical-system-headers"
124 list(APPEND RELEASE_CXX_OPTIONS
125 "-param max-inline-insns-auto=100"
126 "-param=inline-unit-growth=200"
127 "-param=large-unit-insns=10000"
129 # The params bellow causes problem on GCC 4.8 4.8 and 5.4 on PPC64
130 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72855
132 list(APPEND RELEASE_CXX_OPTIONS
133 "-param early-inlining-insns=200"
134 "-param max-early-inliner-iterations=50"
138 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.8 OR
139 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.8)
140 # FIXME: GCC 4.8+ regressions http://git.io/4r7VCQ
141 list(APPEND GENERAL_OPTIONS
142 "ftrack-macro-expansion=0"
146 message(FATAL_ERROR "${PROJECT_NAME} requires g++ 4.8 or greater.")
149 # Fix problem with GCC 4.9, https://kb.isc.org/article/AA-01167
150 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9 OR
151 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.9)
152 list(APPEND GENERAL_OPTIONS "fno-delete-null-pointer-checks")
155 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5.0 OR
156 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5.0)
157 message(WARNING "HHVM is primarily tested on GCC 4.8 and GCC 4.9. Using other versions may produce unexpected results, or may not even build at all.")
160 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5.1 OR
161 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5.1)
162 list(APPEND DISABLED_NAMED_WARNINGS "bool-compare")
163 list(APPEND GENERAL_OPTIONS "DFOLLY_HAVE_MALLOC_H")
166 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 6.0 OR
167 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 6.0)
168 list(APPEND GENERAL_CXX_OPTIONS "Wno-misleading-indentation")
171 # Enabled GCC/LLVM stack-smashing protection
173 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.8 OR
174 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.8)
176 # https://isisblogs.poly.edu/2011/06/01/relro-relocation-read-only/
177 list(APPEND GENERAL_OPTIONS "Wl,-z,relro,-z,now")
179 if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9 OR
180 CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.9)
181 list(APPEND GENERAL_OPTIONS "fstack-protector-strong")
184 list(APPEND GENERAL_OPTIONS "fstack-protector")
190 list(APPEND GENERAL_CXX_OPTIONS "mcrc32")
195 # Force char type to be signed, which is not the case on aarch64.
196 list(APPEND GENERAL_OPTIONS "fsigned-char")
198 # If a CPU was specified, build a -mcpu option for the compiler.
199 set(AARCH64_TARGET_CPU "" CACHE STRING "CPU to tell gcc to optimize for (-mcpu)")
200 if(AARCH64_TARGET_CPU)
201 list(APPEND GENERAL_OPTIONS "mcpu=${AARCH64_TARGET_CPU}")
202 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mcpu=${AARCH64_TARGET_CPU}")
204 # Make sure GCC is not using the fix for errata 843419. This change
205 # interferes with the gold linker. Note that GCC applies this fix
206 # even if you specify an mcpu other than cortex-a53, which is why
207 # it's explicitly being disabled here for any cpu other than
208 # cortex-a53. If you're running a newer pass of the cortex-a53, then
209 # you can likely disable this fix with the following flag too. YMMV
210 if(NOT ${AARCH64_TARGET_CPU} STREQUAL "cortex-a53")
211 list(APPEND GENERAL_OPTIONS "mno-fix-cortex-a53-843419")
218 list(APPEND RELEASE_CXX_OPTIONS "momit-leaf-frame-pointer")
222 set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
225 if (ENABLE_SPLIT_DWARF)
226 set(GDB_SUBOPTION "split-dwarf")
230 # No optimizations for debug builds.
231 # -Og enables some optimizations, but makes debugging harder by optimizing
232 # away some functions and locals. -O0 is more debuggable.
233 # -O0-ggdb was reputed to cause gdb to crash (github #4450)
234 set(CMAKE_C_FLAGS_DEBUG "-O0 -g${GDB_SUBOPTION}")
235 set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g${GDB_SUBOPTION}")
236 set(CMAKE_C_FLAGS_MINSIZEREL "-Os -DNDEBUG")
237 set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os -DNDEBUG")
238 set(CMAKE_C_FLAGS_RELEASE "-O3 -DNDEBUG")
239 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG")
240 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -g${GDB_SUBOPTION} -DNDEBUG")
241 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g${GDB_SUBOPTION} -DNDEBUG")
242 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -W -Werror=implicit-function-declaration")
245 foreach(opt ${DISABLED_NAMED_WARNINGS})
246 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-${opt}")
249 foreach(opt ${DISABLED_C_NAMED_WARNINGS})
250 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-${opt}")
253 foreach(opt ${GENERAL_OPTIONS})
254 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -${opt}")
255 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -${opt}")
258 foreach(opt ${GENERAL_CXX_OPTIONS})
259 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -${opt}")
262 foreach(opt ${DEBUG_CXX_OPTIONS})
263 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -${opt}")
266 foreach(opt ${RELEASE_CXX_OPTIONS})
267 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -${opt}")
270 # The ASM part of this makes it more effort than it's worth
271 # to add these to the general flags system.
273 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mavx2 -march=core-avx2")
274 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx2 -march=core-avx2")
275 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mavx2 -march=core-avx2")
278 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
279 set(CMAKE_C_FLAGS "${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")
280 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -no-ipo -fp-model precise -wd584 -wd1418 -wd1918 -wd383 -wd869 -wd981 -wd424 -wd1419 -wd444 -wd271 -wd2259 -wd1572 -wd1599 -wd82 -wd177 -wd593 -fno-omit-frame-pointer -Wall -Woverloaded-virtual -Wno-deprecated -w1 -Wno-strict-aliasing -Wno-write-strings -Wno-invalid-offsetof -fno-operator-names")
281 # using Visual Studio C++
282 elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
283 message(WARNING "MSVC support is VERY experimental. It will likely not compile, and is intended for the utterly insane.")
285 ############################################################
286 # First we setup and account for the option sets.
287 ############################################################
289 set(MSVC_GENERAL_OPTIONS)
290 set(MSVC_DISABLED_WARNINGS)
291 set(MSVC_WARNINGS_AS_ERRORS)
292 set(MSVC_ADDITIONAL_DEFINES)
293 set(MSVC_EXE_LINKER_OPTIONS)
294 set(MSVC_DEBUG_OPTIONS)
295 set(MSVC_RELEASE_OPTIONS)
296 set(MSVC_RELEASE_LINKER_OPTIONS)
297 set(MSVC_DEBUG_EXE_LINKER_OPTIONS)
298 set(MSVC_RELEASE_EXE_LINKER_OPTIONS)
300 # Some addional configuration options.
301 set(MSVC_ENABLE_ALL_WARNINGS ON CACHE BOOL "If enabled, pass /Wall to the compiler.")
302 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.")
303 set(MSVC_ENABLE_LTCG OFF CACHE BOOL "If enabled, use Link Time Code Generation for Release builds.")
304 set(MSVC_ENABLE_PARALLEL_BUILD ON CACHE BOOL "If enabled, build multiple source files in parallel.")
305 set(MSVC_ENABLE_PCH ON CACHE BOOL "If enabled, use precompiled headers to speed up the build.")
306 set(MSVC_ENABLE_STATIC_ANALYSIS OFF CACHE BOOL "If enabled, do more complex static analysis and generate warnings appropriately.")
307 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.")
308 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.")
310 # The general options passed:
311 list(APPEND MSVC_GENERAL_OPTIONS
312 "bigobj" # Support objects with > 65k sections. Needed for folly due to templates.
313 "fp:precise" # Precise floating point model used in every other build, use it here as well.
314 "EHa" # Enable both SEH and C++ Exceptions.
315 "Oy-" # Disable elimination of stack frames.
316 "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.
317 "Zo" # Enable enhanced optimized debugging. Produces slightly larger pdb files, but the resulting optimized code is much much easier to debug.
320 # Enable all warnings if requested.
321 if (MSVC_ENABLE_ALL_WARNINGS)
322 list(APPEND MSVC_GENERAL_OPTIONS "Wall")
325 # Enable static analysis if requested.
326 if (MSVC_ENABLE_STATIC_ANALYSIS)
327 list(APPEND MSVC_GENERAL_OPTIONS "analyze")
330 # Enable multi-processor compilation if requested.
331 if (MSVC_ENABLE_PARALLEL_BUILD)
332 list(APPEND MSVC_GENERAL_OPTIONS "MP")
335 # Enable AVX2 codegen if available and requested.
337 list(APPEND MSVC_GENERAL_OPTIONS "arch:AVX2")
340 # Validate, and then add the favored architecture.
341 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")
342 message(FATAL_ERROR "MSVC_FAVORED_ARCHITECTURE must be set to one of exactly, 'blend', 'AMD64', 'INTEL64', or 'ATOM'! Got '${MSVC_FAVORED_ARCHITECTURE}' instead!")
344 list(APPEND MSVC_GENERAL_OPTIONS "favor:${MSVC_FAVORED_ARCHITECTURE}")
346 # The warnings that are disabled:
347 list(APPEND MSVC_DISABLED_WARNINGS
348 "4068" # Unknown pragma.
349 "4091" # 'typedef' ignored on left of '' when no variable is declared.
350 "4101" # Unused variables
351 "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
352 "4146" # Unary minus applied to unsigned type, result still unsigned.
353 "4250" # Function was inherited via dominance.
354 "4800" # Values being forced to bool, this happens many places, and is a "performance warning".
357 if (MSVC_ENABLE_ALL_WARNINGS)
358 # These warnings are disabled because we've
359 # enabled all warnings. If all warnings are
360 # not enabled, then these don't need to be
362 list(APPEND MSVC_DISABLED_WARNINGS
363 "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.
364 "4100" # Unreferenced formal parameter.
365 "4127" # Conditional expression is constant.
366 "4131" # Old style declarator used. This is triggered by ext_bc's backend code.
367 "4189" # Local variable is initialized but not referenced.
368 "4191" # Unsafe type cast.
369 "4200" # Non-standard extension, zero sized array.
370 "4201" # Non-standard extension used: nameless struct/union.
371 "4232" # Non-standard extension used: 'pCurrent': address of dllimport.
372 "4245" # Implicit change from signed/unsigned when initializing.
373 "4255" # Implicitly converting fucntion prototype from `()` to `(void)`.
374 "4265" # Class has virtual functions, but destructor is not virtual.
375 "4287" # Unsigned/negative constant mismatch.
376 "4296" # '<' Expression is always false.
377 "4315" # 'this' pointer for member may not be aligned to 8 bytes as expected by the constructor.
378 "4324" # Structure was padded due to alignment specifier.
379 "4355" # 'this' used in base member initializer list.
380 "4365" # Signed/unsigned mismatch.
381 "4371" # Layout of class may have changed due to fixes in packing.
382 "4388" # Signed/unsigned mismatch on relative comparison operator.
383 "4389" # Signed/unsigned mismatch on equality comparison operator.
384 "4435" # Object layout under /vd2 will change due to virtual base.
385 "4456" # Declaration of local hides previous definition of local by the same name.
386 "4457" # Declaration of local hides function parameter.
387 "4458" # Declaration of parameter hides class member.
388 "4459" # Declaration of parameter hides global declaration.
389 "4464" # Relative include path contains "..". This is triggered by the TBB headers.
390 "4505" # Unreferenced local function has been removed. This is mostly the result of things not being needed under MSVC.
391 "4514" # Unreferenced inline function has been removed. (caused by /Zc:inline)
392 "4548" # Expression before comma has no effect. I wouldn't disable this normally, but malloc.h triggers this warning.
393 "4555" # Expression has no effect; expected expression with side-effect. This is triggered by boost/variant.hpp.
394 "4574" # ifdef'd macro was defined to 0.
395 "4582" # Constructor is not implicitly called.
396 "4583" # Destructor is not implicitly called.
397 "4608" # Member has already been initialized by another union member initializer.
398 "4619" # Invalid warning number used in #pragma warning.
399 "4623" # Default constructor was implicitly defined as deleted.
400 "4625" # Copy constructor was implicitly defined as deleted.
401 "4626" # Assignment operator was implicitly defined as deleted.
402 "4647" # __is_pod() has a different value in pervious versions of MSVC.
403 "4668" # Macro was not defined, replacing with 0.
404 "4701" # Potentially uninitialized local variable used.
405 "4702" # Unreachable code.
406 "4706" # Assignment within conditional expression.
407 "4709" # Comma operator within array index expression. This currently just produces false-positives.
408 "4710" # Function was not inlined.
409 "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.
410 "4714" # Function marked as __forceinline not inlined.
411 "4774" # Format string expected in argument is not a string literal.
412 "4820" # Padding added after data member.
413 "4917" # A GUID can only be associated with a class. This is triggered by some standard windows headers.
414 "4946" # reinterpret_cast used between related types.
415 "5026" # Move constructor was implicitly defined as deleted.
416 "5027" # Move assignment operator was implicitly defined as deleted.
417 "5031" # #pragma warning(pop): likely mismatch, popping warning state pushed in different file. This is needed because of how boost does things.
421 if (MSVC_ENABLE_STATIC_ANALYSIS)
422 # Warnings disabled for /analyze
423 list(APPEND MSVC_DISABLED_WARNINGS
424 "6001" # Using uninitialized memory. This is disabled because it is wrong 99% of the time.
425 "6011" # Dereferencing potentially NULL pointer.
426 "6031" # Return value ignored.
427 "6235" # (<non-zero constant> || <expression>) is always a non-zero constant.
428 "6237" # (<zero> && <expression>) is always zero. <expression> is never evaluated and may have side effects.
429 "6239" # (<non-zero constant> && <expression>) always evaluates to the result of <expression>.
430 "6240" # (<expression> && <non-zero constant>) always evaluates to the result of <expression>.
431 "6246" # Local declaration hides declaration of same name in outer scope.
432 "6248" # Setting a SECURITY_DESCRIPTOR's DACL to NULL will result in an unprotected object. This is done by one of the boost headers.
433 "6255" # _alloca indicates failure by raising a stack overflow exception.
434 "6262" # Function uses more than x bytes of stack space.
435 "6271" # Extra parameter passed to format function. The analysis pass doesn't recognize %j or %z, even though the runtime does.
436 "6285" # (<non-zero constant> || <non-zero constant>) is always true.
437 "6297" # 32-bit value is shifted then cast to 64-bits. The places this occurs never use more than 32 bits.
438 "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.
439 "6326" # Potential comparison of a constant with another constant.
440 "6330" # Unsigned/signed mismatch when passed as a parameter.
441 "6340" # Mismatch on sign when passed as format string value.
442 "6387" # '<value>' could be '0': This does not adhere to the specification for a function.
443 "28182" # Dereferencing NULL pointer. '<value>' contains the same NULL value as '<expression>'.
444 "28251" # Inconsistent annotation for function. This is because we only annotate the declaration and not the definition.
445 "28278" # Function appears with no prototype in scope.
449 # Warnings disabled to keep it quiet for now,
450 # most of these should be reviewed and re-enabled:
451 list(APPEND MSVC_DISABLED_WARNINGS
452 "4005" # Macro redefinition
453 "4018" # Signed/unsigned mismatch.
454 "4242" # Possible loss of data when returning a value.
455 "4244" # Implicit truncation of data.
456 "4267" # Implicit truncation of data. This really shouldn't be disabled.
457 "4291" # No matching destructor found.
458 "4302" # Pointer casting size difference
459 "4311" # Pointer casting size difference
460 "4312" # Pointer casting size difference
461 "4477" # Parameter to a formatting function isn't the same type as was passed in the format string.
462 "4624" # Destructor was implicitly undefined.
463 "4804" # Unsafe use of type 'bool' in operation. (comparing if bool is <=> scalar)
464 "4805" # Unsafe mix of scalar type and type 'bool' in operation. (comparing if bool is == scalar)
467 # Warnings to treat as errors:
468 list(APPEND MSVC_WARNINGS_AS_ERRORS
469 "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.
470 "4129" # Unknown escape sequence. This is usually caused by incorrect escaping.
471 "4566" # Character cannot be represented in current charset. This is remidied by prefixing string with "u8".
474 # And the extra defines:
475 list(APPEND MSVC_ADDITIONAL_DEFINES
476 "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.
477 "_CRT_NONSTDC_NO_WARNINGS" # Don't deprecate posix names of functions.
478 "_CRT_SECURE_NO_WARNINGS" # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
479 "_SCL_SECURE_NO_WARNINGS" # Don't deprecate the non _s versions of various standard library functions, because safety is for chumps.
480 "_WINSOCK_DEPRECATED_NO_WARNINGS" # Don't deprecate pieces of winsock
481 "YY_NO_UNISTD_H" # Because MSVC doesn't have unistd.h, which is requested by the YACC generated code.
484 # The options passed to the linker for EXE targets:
485 list(APPEND MSVC_EXE_LINKER_OPTIONS
486 "BASE:0x10000" # Base the program at just over 64k in memory, to play nice with the JIT.
487 "DYNAMICBASE:NO" # Don't randomize the base address.
488 "FIXED" # The program can only be loaded at its preferred base address.
489 "STACK:8388608,8388608" # Set the stack reserve,commit to 8mb. Reserve should probably be higher.
490 "time" # Output some timing information about the link.
493 # The options to pass to the compiler for debug builds:
494 list(APPEND MSVC_DEBUG_OPTIONS
495 "Gy-" # Disable function level linking.
496 "GF-" # Disable string pooling.
499 # Add /Ob2 if allowing inlining in debug mode:
500 if (MSVC_ENABLE_DEBUG_INLINING)
501 list(APPEND MSVC_DEBUG_OPTIONS "Ob2")
504 # The options to pass to the compiler for release builds:
505 list(APPEND MSVC_RELEASE_OPTIONS
506 "GF" # Enable string pooling. (this is enabled by default by the optimization level, but we enable it here for clarity)
507 "Gw" # Optimize global data. (-fdata-sections)
508 "Gy" # Enable function level linking. (-ffunction-sections)
509 "Qpar" # Enable parallel code generation. HHVM itself doesn't currently use this, but it's dependencies, TBB for instance, might, so enable it.
510 "Oi" # Enable intrinsic functions.
511 "Ot" # Favor fast code.
514 # Add /GL to the compiler, and /LTCG to the linker
515 # if link time code generation is enabled.
516 if (MSVC_ENABLE_LTCG)
517 list(APPEND MSVC_RELEASE_OPTIONS "GL")
518 list(APPEND MSVC_RELEASE_LINKER_OPTIONS "LTCG")
521 # The options to pass to the linker for debug builds for EXE targets:
522 list(APPEND MSVC_DEBUG_EXE_LINKER_OPTIONS
523 "OPT:NOREF" # No unreferenced data elimination. (well, mostly)
524 "OPT:NOICF" # No Identical COMDAT folding.
527 # The options to pass to the linker for release builds for EXE targets:
528 list(APPEND MSVC_RELEASE_EXE_LINKER_OPTIONS
529 "OPT:REF" # Remove unreferenced functions and data.
530 "OPT:ICF" # Identical COMDAT folding.
533 ############################################################
534 # Now we need to adjust a couple of the default option sets.
535 ############################################################
537 # We need the static runtime.
539 CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
540 CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
541 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
542 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
543 if (${flag_var} MATCHES "/MD")
544 string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
548 # In order for /Zc:inline, which speeds up the build significantly, to work
549 # we need to remove the /Ob0 parameter that CMake adds by default, because that
550 # would normally disable all inlining.
551 foreach(flag_var CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG)
552 if (${flag_var} MATCHES "/Ob0")
553 string(REGEX REPLACE "/Ob0" "" ${flag_var} "${${flag_var}}")
557 # Ignore a warning about an object file not defining any symbols,
558 # these are known, and we don't care.
559 set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221")
561 ############################################################
562 # And finally, we can set all the flags we've built up.
563 ############################################################
565 foreach(opt ${MSVC_GENERAL_OPTIONS})
566 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /${opt}")
567 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /${opt}")
570 foreach(opt ${MSVC_DISABLED_WARNINGS})
571 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd${opt}")
572 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd${opt}")
575 foreach(opt ${MSVC_WARNINGS_AS_ERRORS})
576 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /we${opt}")
577 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /we${opt}")
580 foreach(opt ${MSVC_ADDITIONAL_DEFINES})
581 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D ${opt}")
582 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D ${opt}")
585 foreach(opt ${MSVC_EXE_LINKER_OPTIONS})
586 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /${opt}")
589 foreach(opt ${MSVC_RELEASE_LINKER_OPTIONS})
591 CMAKE_EXE_LINKER_FLAGS_RELEASE CMAKE_EXE_LINKER_FLAGS_MINSIZEREL CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO
592 CMAKE_SHARED_LINKER_FLAGS_RELEASE CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO
593 CMAKE_STATIC_LINKER_FLAGS_RELEASE CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO)
594 set(${flag_var} "${${flag_var}} /${opt}")
598 foreach(opt ${MSVC_DEBUG_OPTIONS})
599 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /${opt}")
600 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /${opt}")
603 foreach(opt ${MSVC_RELEASE_OPTIONS})
605 CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
606 CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
607 set(${flag_var} "${${flag_var}} /${opt}")
611 foreach(opt ${MSVC_DEBUG_EXE_LINKER_OPTIONS})
612 set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /${opt}")
615 foreach(opt ${MSVC_RELEASE_EXE_LINKER_OPTIONS})
616 set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /${opt}")
617 set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /${opt}")
618 set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /${opt}")
621 message("Warning: unknown/unsupported compiler, things may go wrong")