clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin

OVERVIEW: clang LLVM compiler USAGE: clang [options] <inputs> OPTIONS: -### Print (but do not run) the commands to run for this compilation --analyze Run the static analyzer -arcmt-migrate-emit-errors Emit ARC errors even if the migrator can fix them -arcmt-migrate-report-output <value> Output path for the plist report --cuda-device-only Do device-side CUDA compilation only --cuda-host-only Do host-side CUDA compilation only --cuda-path=<value> CUDA installation path -cxx-isystem <directory> Add directory to the C++ SYSTEM include search path -c Only run preprocess, compile, and assemble steps -dD Print macro definitions in -E mode in addition to normal output -dependency-dot <value> Filename to write DOT-formatted header dependencies to -dependency-file <value> Filename (or -) to write dependency output to -dM Print macro definitions in -E mode instead of normal output -emit-ast Emit Clang AST files for source inputs -emit-llvm Use the LLVM representation for assembler and object files -E Only run the preprocessor -faltivec Enable AltiVec vector initializer syntax -fansi-escape-codes Use ANSI escape codes for diagnostics -fapple-kext Use Apple's kernel extensions ABI -fapple-pragma-pack Enable Apple gcc-compatible #pragma pack handling -fapplication-extension Restrict code to those available for App Extensions -fblocks Enable the 'blocks' language feature -fborland-extensions Accept non-standard constructs supported by the Borland compiler -fbuild-session-file=<file> Use the last modification time of <file> as the build session timestamp -fbuild-session-timestamp=<time since Epoch in seconds> Time when the current build session started -fcolor-diagnostics Use colors in diagnostics -fcomment-block-commands=<arg> Treat each comma separated argument in <arg> as a documentation comment block command -fcoverage-mapping Generate coverage mapping to enable code coverage analysis -fcxx-exceptions Enable C++ exceptions -fdata-sections Place each data in its own section (ELF Only) -fdebug-prefix-map=<value> remap file source paths in debug info -fdebug-types-section Place debug types in their own section (ELF Only) -fdeclspec Allow __declspec as a keyword -fdelayed-template-parsing Parse templated function definitions at the end of the translation unit -fdiagnostics-parseable-fixits Print fix-its in machine parseable form -fdiagnostics-print-source-range-info Print source range spans in numeric form -fdiagnostics-show-note-include-stack Display include stacks for diagnostic notes -fdiagnostics-show-option Print option name with mappable diagnostics -fdiagnostics-show-template-tree Print a template comparison tree for differing templates -fdollars-in-identifiers Allow '$' in identifiers -femit-all-decls Emit all declarations, even if unused -femulated-tls Use emutls functions to access thread_local variables -fexceptions Enable support for exception handling -ffast-math Enable the *frontend*'s 'fast-math' mode. This has no effect on optimizations, but provides a preprocessor macro __FAST_MATH__ the same as GCC's -ffast-math flag -ffixed-r9 Reserve the r9 register (ARM only) -ffixed-x18 Reserve the x18 register (AArch64 only) -ffp-contract=<value> Form fused FP ops (e.g. FMAs): fast (everywhere) | on (according to FP_CONTRACT pragma, default) | off (never fuse) -ffreestanding Assert that the compilation takes place in a freestanding environment -ffunction-sections Place each function in its own section (ELF Only) -fgnu-keywords Allow GNU-extension keywords regardless of language standard -fgnu-runtime Generate output compatible with the standard GNU Objective-C runtime -fgnu89-inline Use the gnu89 inline semantics -fimplicit-module-maps Implicitly search the file system for module map files. -finstrument-functions Generate calls to instrument function entry and exit -fintegrated-as Enable the integrated assembler -flto=<value> Set LTO mode to either 'full' or 'thin' -flto Enable LTO in 'full' mode -fmath-errno Require math functions to indicate errors by setting errno -fmax-type-align=<value> Specify the maximum alignment to enforce on pointers lacking an explicit alignment -fmodule-file=<file> Load this precompiled module file -fmodule-map-file=<file> Load this module map file -fmodule-name= <name> Specify the name of the module to build -fmodules-cache-path=<directory> Specify the module cache path -fmodules-decluse Require declaration of modules used within a module -fmodules-ignore-macro=<value> Ignore the definition of the given macro when building and loading modules -fmodules-prune-after=<seconds> Specify the interval (in seconds) after which a module file will be considered unused -fmodules-prune-interval=<seconds> Specify the interval (in seconds) between attempts to prune the module cache -fmodules-search-all Search even non-imported modules to resolve references -fmodules-strict-decluse Like -fmodules-decluse but requires all headers to be in modules -fmodules-user-build-path <directory> Specify the module user build path -fmodules-validate-once-per-build-session Don't verify input files for the modules if the module has been successfully validated or loaded during this build session -fmodules-validate-system-headers Validate the system headers that a module depends on when loading the module -fmodules Enable the 'modules' language feature -fms-compatibility-version=<value> Dot-separated value representing the Microsoft compiler version number to report in _MSC_VER (0 = don't define it (default)) -fms-compatibility Enable full Microsoft Visual C++ compatibility -fms-extensions Accept some non-standard constructs supported by the Microsoft compiler -fmsc-version=<value> Microsoft compiler version number to report in _MSC_VER (0 = don't define it (default)) -fno-access-control Disable C++ access control -fno-assume-sane-operator-new Don't assume that C++'s global operator new can't alias any pointer -fno-autolink Disable generation of linker directives for automatic library linking -fno-builtin-<value> Disable implicit builtin knowledge of a specific function -fno-builtin Disable implicit builtin knowledge of functions -fno-common Compile common globals like normal definitions -fno-constant-cfstrings Disable creation of CodeFoundation-type constant strings -fno-coverage-mapping Disable code coverage analysis -fno-declspec Disallow __declspec as a keyword -fno-diagnostics-fixit-info Do not include fixit information in diagnostics -fno-dollars-in-identifiers Disallow '$' in identifiers -fno-elide-constructors Disable C++ copy constructor elision -fno-elide-type Do not elide types when printing diagnostics -fno-gnu-inline-asm Disable GNU style inline asm -fno-integrated-as Disable the integrated assembler -fno-lax-vector-conversions Disallow implicit conversions between vectors with a different number of elements or different element types -fno-lto Disable LTO mode (default) -fno-math-builtin Disable implicit builtin knowledge of math functions -fno-merge-all-constants Disallow merging of constants -fno-objc-infer-related-result-type do not infer Objective-C related result type based on method family -fno-operator-names Do not treat C++ operator name keywords as synonyms for operators -fno-profile-instr-generate Disable generation of profile instrumentation. -fno-profile-instr-use Disable using instrumentation data for profile-guided optimization -fno-reroll-loops Turn off loop reroller -fno-rtti Disable generation of rtti information -fno-sanitize-blacklist Don't use blacklist file for sanitizers -fno-sanitize-cfi-cross-dso Disable control flow integrity (CFI) checks for cross-DSO calls. -fno-sanitize-coverage=<value> Disable specified features of coverage instrumentation for Sanitizers -fno-sanitize-memory-track-origins Disable origins tracking in MemorySanitizer -fno-sanitize-recover=<value> Disable recovery for specified sanitizers -fno-sanitize-trap=<value> Disable trapping for specified sanitizers -fno-short-wchar Force wchar_t to be an unsigned int -fno-show-column Do not include column number on diagnostics -fno-show-source-location Do not include source location information with diagnostics -fno-signed-char Char is unsigned -fno-signed-zeros Allow optimizations that ignore the sign of floating point zeros -fno-spell-checking Disable spell-checking -fno-stack-protector Disable the use of stack protectors -fno-standalone-debug Limit debug information produced to reduce size of debug binary -fno-threadsafe-statics Do not emit code to make initialization of local statics thread safe -fno-trigraphs Do not process trigraph sequences -fno-unroll-loops Turn off loop unroller -fno-use-cxa-atexit Don't use __cxa_atexit for calling destructors -fno-use-init-array Don't use .init_array instead of .ctors -fobjc-arc-exceptions Use EH-safe code when synthesizing retains and releases in -fobjc-arc -fobjc-arc Synthesize retain and release calls for Objective-C pointers -fobjc-exceptions Enable Objective-C exceptions -fobjc-gc-only Use GC exclusively for Objective-C related memory management -fobjc-gc Enable Objective-C garbage collection -fobjc-runtime=<value> Specify the target Objective-C runtime kind and version -fobjc-weak Enable ARC-style weak references in Objective-C -fpack-struct=<value> Specify the default maximum struct packing alignment -fpascal-strings Recognize and construct Pascal-style string literals -fpcc-struct-return Override the default ABI to return all structs on the stack -fplugin=<dsopath> Load the named plugin (dynamic shared object) -fprofile-generate=<directory> Generate instrumented code to collect execution counts into <directory>/default.profraw (overridden by LLVM_PROFILE_FILE env var) -fprofile-instr-generate=<file> Generate instrumented code to collect execution counts into <file> (overridden by LLVM_PROFILE_FILE env var) -fprofile-instr-generate Generate instrumented code to collect execution counts into default.profraw file (overriden by '=' form of option or LLVM_PROFILE_FILE env var) -fprofile-instr-use=<value> Use instrumentation data for profile-guided optimization -fprofile-sample-use=<value> Enable sample-based profile guided optimizations -fprofile-use=<pathname> Use instrumentation data for profile-guided optimization. If pathname is a directory, it reads from <pathname>/default.profdata. Otherwise, it reads from file <pathname>. -freciprocal-math Allow division operations to be reassociated -freg-struct-return Override the default ABI to return small structs in registers -freroll-loops Turn on loop reroller -fsanitize-address-field-padding=<value> Level of field padding for AddressSanitizer -fsanitize-blacklist=<value> Path to blacklist file for sanitizers -fsanitize-cfi-cross-dso Enable control flow integrity (CFI) checks for cross-DSO calls. -fsanitize-coverage=<value> Specify the type of coverage instrumentation for Sanitizers -fsanitize-memory-track-origins=<value> Enable origins tracking in MemorySanitizer -fsanitize-memory-track-origins Enable origins tracking in MemorySanitizer -fsanitize-memory-use-after-dtor Enable use-after-destroy detection in MemorySanitizer -fsanitize-recover=<value> Enable recovery for specified sanitizers -fsanitize-trap=<value> Enable trapping for specified sanitizers -fsanitize=<check> Turn on runtime checks for various forms of undefined or suspicious behavior. See user manual for available checks -fshort-enums Allocate to an enum type only as many bytes as it needs for the declared range of possible values -fshort-wchar Force wchar_t to be a short unsigned int -fshow-overloads=<value> Which overload candidates to show when overload resolution fails: best|all; defaults to all -fsized-deallocation Enable C++14 sized global deallocation functions -fslp-vectorize-aggressive Enable the BB vectorization passes -fslp-vectorize Enable the superword-level parallelism vectorization passes -fstack-protector-all Force the usage of stack protectors for all functions -fstack-protector-strong Use a strong heuristic to apply stack protectors to functions -fstack-protector Enable stack protectors for functions potentially vulnerable to stack smashing -fstandalone-debug Emit full debug info for all types used by the program -fstrict-enums Enable optimizations based on the strict definition of an enum's value range -fstrict-vtable-pointers Enable optimizations based on the strict rules for overwriting polymorphic C++ objects -fthinlto-index=<value> Perform ThinLTO importing using provided function summary index -ftrap-function=<value> Issue call to specified function rather than a trap instruction -ftrapv-handler=<function name> Specify the function to be called on overflow -ftrapv Trap on integer overflow -ftrigraphs Process trigraph sequences -funique-section-names Use unique names for text and data sections (ELF Only) -funroll-loops Turn on loop unroller -fuse-init-array Use .init_array instead of .ctors -fveclib=<value> Use the given vector functions library -fvectorize Enable the loop vectorization passes -fvisibility-inlines-hidden Give inline C++ member functions default visibility by default -fvisibility-ms-compat Give global types 'default' visibility and global functions and variables 'hidden' visibility by default -fvisibility=<value> Set the default symbol visibility for all global declarations -fwrapv Treat signed integer overflow as two's complement -fwritable-strings Store string literals as writable data -fzvector Enable System z vector language extension -F <value> Add directory to framework include search path --gcc-toolchain=<value> Use the gcc toolchain at the given directory -gcodeview Generate CodeView debug information -gdwarf-2 Generate source-level debug information with dwarf version 2 -gdwarf-3 Generate source-level debug information with dwarf version 3 -gdwarf-4 Generate source-level debug information with dwarf version 4 -gdwarf-5 Generate source-level debug information with dwarf version 5 -gline-tables-only Emit debug line number tables only -gmodules Generate debug info with external references to clang modules or precompiled headers -g Generate source-level debug information -help Display available options -H Show header includes and nesting depth -idirafter <value> Add directory to AFTER include search path -iframework <value> Add directory to SYSTEM framework search path -imacros <file> Include macros from file before parsing -include-pch <file> Include precompiled header file -include <file> Include file before parsing -index-header-map Make the next included directory (-I or -F) an indexer header map -iprefix <dir> Set the -iwithprefix/-iwithprefixbefore prefix -iquote <directory> Add directory to QUOTE include search path -isysroot <dir> Set the system root directory (usually /) -isystem <directory> Add directory to SYSTEM include search path -ivfsoverlay <value> Overlay the virtual filesystem described by file over the real file system -iwithprefixbefore <dir> Set directory to include search path with prefix -iwithprefix <dir> Set directory to SYSTEM include search path with prefix -iwithsysroot <directory> Add directory to SYSTEM include search path, absolute paths are relative to -isysroot -I <value> Add directory to include search path -mabicalls Enable SVR4-style position-independent code (Mips only) -mcrc Allow use of CRC instructions (ARM only) -MD Write a depfile containing user and system headers -meabi <value> Set EABI type, e.g. 4, 5 or gnu (default depends on triple) -mfix-cortex-a53-835769 Workaround Cortex-A53 erratum 835769 (AArch64 only) -mfp32 Use 32-bit floating point registers (MIPS only) -mfp64 Use 64-bit floating point registers (MIPS only) -MF <file> Write depfile output from -MMD, -MD, -MM, or -M to <file> -mgeneral-regs-only Generate code which only uses the general purpose registers (AArch64 only) -mglobal-merge Enable merging of globals -MG Add missing headers to depfile -mhvx-double Enable Hexagon Double Vector eXtensions -mhvx Enable Hexagon Vector eXtensions --migrate Run the migrator -mincremental-linker-compatible (integrated-as) Emit an object file which can be used with an incremental linker -mios-version-min=<value> Set iOS deployment target -mllvm <value> Additional arguments to forward to LLVM's option processing -mlong-calls Generate an indirect jump to enable jumps further than 64M -mmacosx-version-min=<value> Set Mac OS X deployment target -MMD Write a depfile containing user headers -mms-bitfields Set the default structure layout to be compatible with the Microsoft compiler standard -mmsa Enable MSA ASE (MIPS only) -MM Like -MMD, but also implies -E and writes to stdout by default -mno-abicalls Disable SVR4-style position-independent code (Mips only) -mno-fix-cortex-a53-835769 Don't workaround Cortex-A53 erratum 835769 (AArch64 only) -mno-global-merge Disable merging of globals -mno-hvx-double Disable Hexagon Double Vector eXtensions -mno-hvx Disable Hexagon Vector eXtensions -mno-implicit-float Don't generate implicit floating point instructions -mno-incremental-linker-compatible (integrated-as) Emit an object file which cannot be used with an incremental linker -mno-long-calls Restore the default behaviour of not generating long calls -mno-movt Disallow use of movt/movw pairs (ARM only) -mno-ms-bitfields Do not set the default structure layout to be compatible with the Microsoft compiler standard -mno-msa Disable MSA ASE (MIPS only) -mno-restrict-it Allow generation of deprecated IT blocks for ARMv8. It is off by default for ARMv8 Thumb mode -mno-unaligned-access Force all memory accesses to be aligned (AArch32/AArch64 only) -mnocrc Disallow use of CRC instructions (ARM only) -module-dependency-dir <value> Directory to dump module dependencies to -momit-leaf-frame-pointer Omit frame pointer setup for leaf functions -MP Create phony target for each dependency (other than main file) -mqdsp6-compat Enable hexagon-qdsp6 backward compatibility -MQ <value> Specify name of main file output to quote in depfile -mrelax-all (integrated-as) Relax all machine instructions -mrestrict-it Disallow generation of deprecated IT blocks for ARMv8. It is on by default for ARMv8 Thumb mode. -mrtd Make StdCall calling convention the default -msoft-float Use software floating point -mstack-alignment=<value> Set the stack alignment -mstack-probe-size=<value> Set the stack probe size -mstackrealign Force realign the stack at entry to every function -mthread-model <value> The thread model to use, e.g. posix, single (posix by default) -MT <value> Specify name of main file output in depfile -munaligned-access Allow memory accesses to be unaligned (AArch32/AArch64 only) -MV Use NMake/Jom format for the depfile -M Like -MD, but also implies -E and writes to stdout by default --no-system-header-prefix=<prefix> Treat all #include paths starting with <prefix> as not including a system header. -nobuiltininc Disable builtin #include directories -nostdinc++ Disable standard #include directories for the C++ standard library -ObjC++ Treat source input files as Objective-C++ inputs -objcmt-atomic-property Make migration to 'atomic' properties -objcmt-migrate-all Enable migration to modern ObjC -objcmt-migrate-annotation Enable migration to property and method annotations -objcmt-migrate-designated-init Enable migration to infer NS_DESIGNATED_INITIALIZER for initializer methods -objcmt-migrate-instancetype Enable migration to infer instancetype for method result type -objcmt-migrate-literals Enable migration to modern ObjC literals -objcmt-migrate-ns-macros Enable migration to NS_ENUM/NS_OPTIONS macros -objcmt-migrate-property-dot-syntax Enable migration of setter/getter messages to property-dot syntax -objcmt-migrate-property Enable migration to modern ObjC property -objcmt-migrate-protocol-conformance Enable migration to add protocol conformance on classes -objcmt-migrate-readonly-property Enable migration to modern ObjC readonly property -objcmt-migrate-readwrite-property Enable migration to modern ObjC readwrite property -objcmt-migrate-subscripting Enable migration to modern ObjC subscripting -objcmt-ns-nonatomic-iosonly Enable migration to use NS_NONATOMIC_IOSONLY macro for setting property's 'atomic' attribute -objcmt-returns-innerpointer-property Enable migration to annotate property with NS_RETURNS_INNER_POINTER -objcmt-whitelist-dir-path=<value> Only modify files with a filename contained in the provided directory path -ObjC Treat source input files as Objective-C inputs -omptargets=<value> Specify comma-separated list of triples OpenMP offloading targets to be supported -o <file> Write output to <file> -pg Enable mcount instrumentation -pipe Use pipes between commands, when possible -print-file-name=<file> Print the full library path of <file> -print-ivar-layout Enable Objective-C Ivar layout bitmap print trace -print-libgcc-file-name Print the library path for "libgcc.a" -print-prog-name=<name> Print the full program path of <name> -print-search-dirs Print the paths used for finding libraries and programs -pthread Support POSIX threads in generated code -P Disable linemarker output in -E mode -Qunused-arguments Don't emit warning for unused driver arguments -relocatable-pch Whether to build a relocatable precompiled header -rewrite-legacy-objc Rewrite Legacy Objective-C source to C++ -rewrite-objc Rewrite Objective-C source to C++ -Rpass-analysis=<value> Report transformation analysis from optimization passes whose name matches the given POSIX regular expression -Rpass-missed=<value> Report missed transformations by optimization passes whose name matches the given POSIX regular expression -Rpass=<value> Report transformations performed by optimization passes whose name matches the given POSIX regular expression -R<remark> Enable the specified remark -save-temps=<value> Save intermediate compilation results. -save-temps Save intermediate compilation results -serialize-diagnostics <value> Serialize compiler diagnostics to a file -std=<value> Language standard to compile for -stdlib=<value> C++ standard library to use --system-header-prefix=<prefix> Treat all #include paths starting with <prefix> as including a system header. -S Only run preprocess and compilation steps --target=<value> Generate code for the given target -time Time individual commands -traditional-cpp Enable some traditional CPP emulation -trigraphs Process trigraph sequences -undef undef all system defines --verify-debug-info Verify the binary representation of debug output -verify-pch Load and verify that a pre-compiled header file is not stale -v Show commands to run and use verbose output -Wa,<arg> Pass the comma separated arguments in <arg> to the assembler -Wl,<arg> Pass the comma separated arguments in <arg> to the linker -working-directory <value> Resolve file paths relative to the specified directory -Wp,<arg> Pass the comma separated arguments in <arg> to the preprocessor -W<warning> Enable the specified warning -w Suppress all warnings -Xanalyzer <arg> Pass <arg> to the static analyzer -Xassembler <arg> Pass <arg> to the assembler -Xclang <arg> Pass <arg> to the clang compiler -Xlinker <arg> Pass <arg> to the linker -Xpreprocessor <arg> Pass <arg> to the preprocessor -x <language> Treat subsequent input files as having type <language> -z <arg> Pass -z <arg> to the linker