>arm-none-eabi-gcc --help=params
>arm-none-eabi-gcc --help=params
>arm-none-eabi-gcc --help=params
The --param option recognizes the following as parameters:
predictable-branch-outcome Maximal estimated outcome of branch considered
predictable.
inline-min-speedup The minimal estimated speedup allowing inliner to
ignore inline-insns-single and inline-isnsns-auto.
max-inline-insns-single The maximum number of instructions in a single
function eligible for inlining.
max-inline-insns-auto The maximum number of instructions when
automatically inlining.
max-inline-insns-recursive The maximum number of instructions inline
function can grow to via recursive inlining.
max-inline-insns-recursive-auto The maximum number of instructions non-inline
function can grow to via recursive inlining.
max-inline-recursive-depth The maximum depth of recursive inlining for
inline functions.
max-inline-recursive-depth-auto The maximum depth of recursive inlining for
non-inline functions.
min-inline-recursive-probability Inline recursively only when the probability
of call being executed exceeds the parameter.
max-early-inliner-iterations The maximum number of nested indirect inlining
performed by early inliner.
comdat-sharing-probability Probability that COMDAT function will be shared
with different compilation unit.
partial-inlining-entry-probability Maximum probability of the entry BB of
split region (in percent relative to entry BB of
the function) to make partial inlining happen.
max-variable-expansions-in-unroller If -fvariable-expansion-in-unroller is
used, the maximum number of times that an
individual variable will be expanded during loop
unrolling.
min-vect-loop-bound If -ftree-vectorize is used, the minimal loop
bound of a loop to be considered for
vectorization.
max-delay-slot-insn-search The maximum number of instructions to consider to
fill a delay slot.
max-delay-slot-live-search The maximum number of instructions to consider to
find accurate live register information.
max-pending-list-length The maximum length of scheduling's pending
operations list.
max-modulo-backtrack-attempts The maximum number of backtrack attempts the
scheduler should make when modulo scheduling a
loop.
large-function-insns The size of function body to be considered large.
large-function-growth Maximal growth due to inlining of large function
(in percent).
large-unit-insns The size of translation unit to be considered
large.
inline-unit-growth How much can given compilation unit grow because
of the inlining (in percent).
ipcp-unit-growth How much can given compilation unit grow because
of the interprocedural constant propagation (in
percent).
early-inlining-insns Maximal estimated growth of function body caused
by early inlining of single call.
large-stack-frame The size of stack frame to be considered large.
large-stack-frame-growth Maximal stack frame growth due to inlining (in
percent).
max-gcse-memory The maximum amount of memory to be allocated by
GCSE.
max-gcse-insertion-ratio The maximum ratio of insertions to deletions of
expressions in GCSE.
gcse-after-reload-partial-fraction The threshold ratio for performing partial
redundancy elimination after reload.
gcse-after-reload-critical-fraction The threshold ratio of critical edges
execution count that permit performing redundancy
elimination after reload.
gcse-cost-distance-ratio Scaling factor in calculation of maximum distance
an expression can be moved by GCSE optimizations.
gcse-unrestricted-cost Cost at which GCSE optimizations will not
constraint the distance an expression can travel.
max-hoist-depth Maximum depth of search in the dominator tree for
expressions to hoist.
max-pow-sqrt-depth Maximum depth of sqrt chains to use when
synthesizing exponentiation by a real constant.
max-unrolled-insns The maximum number of instructions to consider to
unroll in a loop.
max-average-unrolled-insns The maximum number of instructions to consider to
unroll in a loop on average.
max-unroll-times The maximum number of unrollings of a single loop.
max-peeled-insns The maximum number of insns of a peeled loop.
max-peel-times The maximum number of peelings of a single loop.
max-peel-branches The maximum number of branches on the path
through the peeled sequence.
max-completely-peeled-insns The maximum number of insns of a completely
peeled loop.
max-completely-peel-times The maximum number of peelings of a single loop
that is peeled completely.
max-once-peeled-insns The maximum number of insns of a peeled loop that
rolls only once.
max-completely-peel-loop-nest-depth The maximum depth of a loop nest we
completely peel.
max-unswitch-insns The maximum number of insns of an unswitched loop.
max-unswitch-level The maximum number of unswitchings in a single
loop.
max-iterations-to-track Bound on the number of iterations the brute force
# of iterations analysis algorithm evaluates.
max-iterations-computation-cost Bound on the cost of an expression to compute
the number of iterations.
sms-max-ii-factor A factor for tuning the upper bound that swing
modulo scheduler uses for scheduling a loop.
sms-min-sc The minimum value of stage count that swing
modulo scheduler will generate.
sms-dfa-history The number of cycles the swing modulo scheduler
considers when checking conflicts using DFA.
sms-loop-average-count-threshold A threshold on the average loop count
considered by the swing modulo scheduler.
hot-bb-count-ws-permille A basic block profile count is considered hot if
it contributes to the given permillage of the
entire profiled execution.
hot-bb-frequency-fraction Select fraction of the maximal frequency of
executions of basic block in function given basic
block needs to have to be considered hot.
unlikely-bb-count-fraction The minimum fraction of profile runs a given
basic block execution count must be not to be
considered unlikely.
align-threshold Select fraction of the maximal frequency of
executions of basic block in function given basic
block get alignment.
align-loop-iterations Loops iterating at least selected number of
iterations will get loop alignement..
max-predicted-iterations The maximum number of loop iterations we predict
statically.
builtin-expect-probability Set the estimated probability in percentage for
builtin expect. The default value is 90%
probability.
tracer-dynamic-coverage-feedback The percentage of function, weighted by
execution frequency, that must be covered by
trace formation. Used when profile feedback is
available.
tracer-dynamic-coverage The percentage of function, weighted by execution
frequency, that must be covered by trace
formation. Used when profile feedback is not
available.
tracer-max-code-growth Maximal code growth caused by tail duplication
(in percent).
tracer-min-branch-ratio Stop reverse growth if the reverse probability of
best edge is less than this threshold (in
percent).
tracer-min-branch-probability-feedback Stop forward growth if the probability
of best edge is less than this threshold (in
percent). Used when profile feedback is available.
tracer-min-branch-probability Stop forward growth if the probability of best
edge is less than this threshold (in percent).
Used when profile feedback is not available.
max-crossjump-edges The maximum number of incoming edges to consider
for crossjumping.
min-crossjump-insns The minimum number of matching instructions to
consider for crossjumping.
max-grow-copy-bb-insns The maximum expansion factor when copying basic
blocks.
max-goto-duplication-insns The maximum number of insns to duplicate when
unfactoring computed gotos.
max-cse-path-length The maximum length of path considered in cse.
max-cse-insns The maximum instructions CSE process before
flushing.
lim-expensive The minimum cost of an expensive expression in
the loop invariant motion.
iv-consider-all-candidates-bound Bound on number of candidates below that all
candidates are considered in iv optimizations.
iv-max-considered-uses Bound on number of iv uses in loop optimized in
iv optimizations.
iv-always-prune-cand-set-bound If number of candidates in the set is smaller,
we always try to remove unused ivs during its
optimization.
scev-max-expr-size Bound on size of expressions used in the scalar
evolutions analyzer.
scev-max-expr-complexity Bound on the complexity of the expressions in the
scalar evolutions analyzer.
vect-max-version-for-alignment-checks Bound on number of runtime checks
inserted by the vectorizer's loop versioning for
alignment check.
vect-max-version-for-alias-checks Bound on number of runtime checks inserted
by the vectorizer's loop versioning for alias
check.
vect-max-peeling-for-alignment Max number of loop peels to enhancement
alignment of data references in a loop.
max-cselib-memory-locations The maximum memory locations recorded by cselib.
ggc-min-expand Minimum heap expansion to trigger garbage
collection, as a percentage of the total size of
the heap.
ggc-min-heapsize Minimum heap size before we start collecting
garbage, in kilobytes.
max-reload-search-insns The maximum number of instructions to search
backward when looking for equivalent reload.
sink-frequency-threshold Target block's relative execution frequency (as a
percentage) required to sink a statement.
max-sched-region-blocks The maximum number of blocks in a region to be
considered for interblock scheduling.
max-sched-region-insns The maximum number of insns in a region to be
considered for interblock scheduling.
max-pipeline-region-blocks The maximum number of blocks in a region to be
considered for interblock scheduling.
max-pipeline-region-insns The maximum number of insns in a region to be
considered for interblock scheduling.
min-spec-prob The minimum probability of reaching a source
block for interblock speculative scheduling.
max-sched-extend-regions-iters The maximum number of iterations through CFG
to extend regions.
max-sched-insn-conflict-delay The maximum conflict delay for an insn to be
considered for speculative motion.
sched-spec-prob-cutoff The minimal probability of speculation success
(in percents), so that speculative insn will be
scheduled.
sched-state-edge-prob-cutoff The minimum probability an edge must have for
the scheduler to save its state across it.
selsched-max-lookahead The maximum size of the lookahead window of
selective scheduling.
selsched-max-sched-times Maximum number of times that an insn could be
scheduled.
selsched-insns-to-rename Maximum number of instructions in the ready list
that are considered eligible for renaming.
sched-mem-true-dep-cost Minimal distance between possibly conflicting
store and load.
sched-autopref-queue-depth Hardware autoprefetcher scheduler model control
flag. Number of lookahead cycles the model looks
into; at '0' only enable instruction sorting
heuristic. Disabled by default.
max-last-value-rtl The maximum number of RTL nodes that can be
recorded as combiner's last value.
max-combine-insns The maximum number of insns combine tries to
combine.
integer-share-limit The upper bound for sharing integer constants.
ssp-buffer-size The lower bound for a buffer to be considered for
stack smashing protection.
min-size-for-stack-sharing The minimum size of variables taking part in
stack slot sharing when not optimizing.
max-jump-thread-duplication-stmts Maximum number of statements allowed in a
block that needs to be duplicated when threading
jumps.
max-fields-for-field-sensitive Maximum number of fields in a structure before
pointer analysis treats the structure as a single
variable.
max-sched-ready-insns The maximum number of instructions ready to be
issued to be considered by the scheduler during
the first scheduling pass.
max-dse-active-local-stores Maximum number of active local stores in RTL dead
store elimination.
prefetch-latency The number of insns executed before prefetch is
completed.
simultaneous-prefetches The number of prefetches that can run at the same
time.
l1-cache-size The size of L1 cache.
l1-cache-line-size The size of L1 cache line.
l2-cache-size The size of L2 cache.
use-canonical-types Whether to use canonical types.
max-partial-antic-length Maximum length of partial antic set when
performing tree pre optimization.
sccvn-max-scc-size Maximum size of a SCC before SCCVN stops
processing a function.
sccvn-max-alias-queries-per-access Maximum number of disambiguations to
perform per memory access.
ira-max-loops-num Max loops number for regional RA.
ira-max-conflict-table-size Max size of conflict table in MB.
ira-loop-reserved-regs The number of registers in each class kept unused
by loop invariant motion.
lra-max-considered-reload-pseudos The max number of reload pseudos which are
considered during spilling a non-reload pseudo.
lra-inheritance-ebb-probability-cutoff Minimal fall-through edge probability
in percentage used to add BB to inheritance EBB
in LRA.
switch-conversion-max-branch-ratio The maximum ratio between array size and
switch branches for a switch conversion to take
place.
loop-block-tile-size size of tiles for loop blocking.
graphite-max-nb-scop-params maximum number of parameters in a SCoP.
graphite-max-bbs-per-function maximum number of basic blocks per function to
be analyzed by Graphite.
graphite-max-arrays-per-scop maximum number of arrays per scop.
graphite-min-loops-per-function minimal number of loops per function to be
analyzed by Graphite.
max-isl-operations maximum number of isl operations, 0 means
unlimited
loop-max-datarefs-for-datadeps Maximum number of datarefs in loop for
building loop data dependencies.
loop-invariant-max-bbs-in-loop Max basic blocks number in loop for loop
invariant motion.
profile-func-internal-id use internal function id in profile lookup.
indir-call-topn-profile track topn target addresses in indirect-call
profile.
slp-max-insns-in-bb Maximum number of instructions in basic block to
be considered for SLP vectorization.
min-insn-to-prefetch-ratio Min. ratio of insns to prefetches to enable
prefetching for a loop with an unknown trip count.
prefetch-min-insn-to-mem-ratio Min. ratio of insns to mem ops to enable
prefetching in a loop.
max-vartrack-size Max. size of var tracking hash tables.
max-vartrack-expr-depth Max. recursion depth for expanding var tracking
expressions.
max-vartrack-reverse-op-size Max. size of loc list for which reverse ops
should be added.
min-nondebug-insn-uid The minimum UID to be used for a nondebug insn.
ipa-sra-ptr-growth-factor Maximum allowed growth of size of new parameters
ipa-sra replaces a pointer to an aggregate with.
tm-max-aggregate-size Size in bytes after which thread-local aggregates
should be instrumented with the logging functions
instead of save/restore pairs.
sra-max-scalarization-size-Ospeed Maximum size, in storage units, of an
aggregate which should be considered for
scalarization when compiling for speed.
sra-max-scalarization-size-Osize Maximum size, in storage units, of an
aggregate which should be considered for
scalarization when compiling for size.
ipa-cp-value-list-size Maximum size of a list of values associated with
each parameter for interprocedural constant
propagation.
ipa-cp-eval-threshold Threshold ipa-cp opportunity evaluation that is
still considered beneficial to clone..
ipa-cp-recursion-penalty Percentage penalty the recursive functions will
receive when they are evaluated for cloning..
ipa-cp-single-call-penalty Percentage penalty functions containg a single
call to another function will receive when they
are evaluated for cloning..
ipa-max-agg-items Maximum number of aggregate content items for a
parameter in jump functions and lattices.
ipa-cp-loop-hint-bonus Compile-time bonus IPA-CP assigns to candidates
which make loop bounds or strides known..
ipa-cp-array-index-hint-bonus Compile-time bonus IPA-CP assigns to candidates
which make an array index known..
ipa-max-aa-steps Maximum number of statements that will be visited
by IPA formal parameter analysis based on alias
analysis in any given function.
lto-partitions Number of partitions the program should be split
to.
lto-min-partition Minimal size of a partition for LTO (in estimated
instructions).
cxx-max-namespaces-for-diagnostic-help Maximum number of namespaces to search
for alternatives when name lookup fails.
max-stores-to-sink Maximum number of conditional store pairs that
can be sunk.
case-values-threshold The smallest number of different values for which
it is best to use a jump-table instead of a tree
of conditional branches, if 0, use the default
for the machine.
allow-store-data-races Allow new data races on stores to be introduced.
tree-reassoc-width Set the maximum number of instructions executed
in parallel in reassociated tree. If 0, use the
target dependent heuristic..
max-tail-merge-comparisons Maximum amount of similar bbs to compare a bb
with.
max-tail-merge-iterations Maximum amount of iterations of the pass over a
function.
max-tracked-strlens Maximum number of strings for which strlen
optimization pass will track string lengths.
sched-pressure-algorithm Which -fsched-pressure algorithm to apply.
max-slsr-cand-scan Maximum length of candidate scans for straight-
line strength reduction.
asan-stack Enable asan stack protection.
asan-globals Enable asan globals protection.
asan-instrument-writes Enable asan store operations protection.
asan-instrument-reads Enable asan load operations protection.
asan-memintrin Enable asan builtin functions protection.
asan-use-after-return Enable asan detection of use-after-return bugs.
asan-instrumentation-with-call-threshold Use callbacks instead of inline code
if number of accesses in function becomes greater
or equal to this number.
uninit-control-dep-attempts Maximum number of nested calls to search for
control dependencies during uninitialized
variable analysis.
chkp-max-ctor-size Maximum number of statements to be included into
a single static constructor generated by Pointer
Bounds Checker.
fsm-scale-path-stmts Scale factor to apply to the number of statements
in a threading path when comparing to the number
of (scaled) blocks.
fsm-maximum-phi-arguments Maximum number of arguments a PHI may have before
the FSM threader will not try to thread through
its block.
fsm-scale-path-blocks Scale factor to apply to the number of blocks in
a threading path when comparing to the number of
(scaled) statements.
max-fsm-thread-path-insns Maximum number of instructions to copy when
duplicating blocks on a finite state automaton
jump thread path.
max-fsm-thread-length Maximum number of basic blocks on a finite state
automaton jump thread path.
max-fsm-thread-paths Maximum number of new jump thread paths to create
for a finite state automaton.
parloops-chunk-size Chunk size of omp schedule for loops parallelized
by parloops.
parloops-schedule Schedule type of omp schedule for loops
parallelized by parloops (static, dynamic,
guided, auto, runtime).
max-ssa-name-query-depth Maximum recursion depth allowed when querying a
property of an SSA name.
max-rtl-if-conversion-insns Maximum number of insns in a basic block to
consider for RTL if-conversion.
hsa-gen-debug-stores Level of hsa debug stores verbosity
max-speculative-devirt-maydefs Maximum number of may-defs visited when
devirtualizing speculatively
C:\Users\m_fujii>arm-none-eabi-gcc --help=joined
The following options take joined arguments:
--assert= Same as -A. Use the latter option instead.
--define-macro= Same as -D. Use the latter option instead.
--dump= Same as -d. Use the latter option instead.
--help=<class> Display descriptions of a specific class of
options. <class> is one or more of optimizers,
target, warnings, undocumented, params.
--imacros= Same as -imacros. Use the latter option instead.
--include-directory-after= Same as -idirafter. Use the latter option
instead.
--include-directory= Same as -I. Use the latter option instead.
--include-prefix= Same as -iprefix. Use the latter option instead.
--include-with-prefix-after= Same as -iwithprefix. Use the latter option
instead.
--include-with-prefix-before= Same as -iwithprefixbefore. Use the latter
option instead.
--include-with-prefix= Same as -iwithprefix. Use the latter option
instead.
--include= Same as -include. Use the latter option instead.
--output-class-directory= This option lacks documentation.
--output-pch= This option lacks documentation.
--output= Same as -o. Use the latter option instead.
--param= Same as --param. Use the latter option instead.
--resource= This option lacks documentation.
--undefine-macro= Same as -U. Use the latter option instead.
-A<question>=<answer> Assert the <answer> to <question>. Putting '-'
before <question> disables the <answer> to
<question>.
-D<macro>[=<val>] Define a <macro> with <val> as its value. If
just <macro> is given, <val> is taken to be 1.
-F <dir> Add <dir> to the end of the main framework
include path.
-I <dir> Add <dir> to the end of the main include path.
-J<directory> Put MODULE files in 'directory'.
-L This option lacks documentation.
-MF <file> Write dependency output to the given file.
-MQ <target> Add a MAKE-quoted target.
-MT <target> Add an unquoted target.
-O<number> Set optimization level to <number>.
-U<macro> Undefine <macro>.
-Wabi= Warn about things that change between the current
-fabi-version and the specified version.
-Warray-bounds= Warn if an array is accessed out of bounds.
-Werror= Treat specified warning as error.
-Wformat= Warn about printf/scanf/strftime/strfmon format
string anomalies.
-Wframe-larger-than=<number> Warn if a function's stack frame requires more
than <number> bytes.
-Wlarger-than- Same as -Wlarger-than=. Use the latter option
instead.
-Wlarger-than=<number> Warn if an object is larger than <number> bytes.
-Wnormalized=<none|id|nfc|nfkc> Warn about non-normalised Unicode strings.
-Wplacement-new= Warn for placement new expressions with undefined
behavior.
-Wshift-overflow= Warn if left shift of a signed value overflows.
-Wstack-usage= Warn if stack usage might be larger than
specified amount.
-Wstrict-aliasing= Warn about code which might break strict aliasing
rules.
-Wstrict-overflow= Warn about optimizations that assume that signed
overflow is undefined.
-Wunused-const-variable= Warn when a const variable is unused.
-aux-info= Same as -aux-info. Use the latter option instead.
-cpp= This option lacks documentation.
-d<letters> Enable dumps from specific passes of the compiler.
--CLASSPATH Deprecated; use --classpath instead. Same as
-fclasspath=.
-fRTS= Select the runtime.
-fabi-compat-version= The version of the C++ ABI used for -Wabi
warnings and link compatibility aliases.
-fabi-version= The version of the C++ ABI in use.
-fada-spec-parent= -fada-spec-parent=unit Dump Ada specs as child
units of given parent.
-falign-functions= This option lacks documentation.
-falign-jumps= This option lacks documentation.
-falign-labels= This option lacks documentation.
-falign-loops= This option lacks documentation.
-fasan-shadow-offset=<number> Use custom shadow memory offset.
-fassume-compiled= This option lacks documentation.
-fauto-profile= Use sample profile information for call graph
node weights. The profile file is specified in
the argument.
-fblas-matmul-limit=<n> Size of the smallest matrix for which matmul will
use BLAS.
--bootclasspath=<path> Replace system path.
-fbuiltin- This option lacks documentation.
-fcall-saved-<register> Mark <register> as being preserved across
functions.
-fcall-used-<register> Mark <register> as being corrupted by function
calls.
-fcheck=[...] Specify which runtime checks are to be performed.
--classpath=<path> Set class path.
-fcoarray=<none|single|lib> Specify which coarray parallelization should be
used.
-fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and
compare the final-insns dump.
-fcompile-resource= This option lacks documentation.
-fconst-string-class=<name> Use class <name> for constant strings.
-fconstexpr-depth=<number> Specify maximum constexpr recursion depth.
-fconvert= -fconvert=<big-endian|little-endian|native|swap>
The endianness used for unformatted files.
-fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter
limit.
-fdebug-prefix-map= Map one directory name to another in debug
information.
-fdiagnostics-color=[never|always|auto] Colorize diagnostics.
-fdiagnostics-show-location=[once|every-line] How often to emit source
location at the beginning of line-wrapped
diagnostics.
-fdisable- -fdisable-[tree|rtl|ipa]-<pass>=range1+range2
disables an optimization pass.
-fdisable-assertions= This option lacks documentation.
-fdump-<type> Dump various compiler internals to a file.
-fdump-final-insns=filename Dump to filename the insns at the end of
translation.
-fdump-go-spec=filename Write all declarations to file as Go code.
-femit-struct-debug-detailed=<spec-list> Detailed reduced debug info for
structs.
-fenable- -fenable-[tree|rtl|ipa]-<pass>=range1+range2
enables an optimization pass.
-fenable-assertions= This option lacks documentation.
--encoding=<encoding> Choose input encoding (defaults from your locale).
-fexcess-precision=[fast|standard] Specify handling of excess floating-point
precision.
-fexec-charset=<cset> Convert all strings and character constants to
character set <cset>.
--extdirs=<path> Set the extension directory path.
-ffixed-<register> Mark <register> as being unavailable to the
compiler.
-ffixed-line-length-<n> Use n as character line width in fixed mode.
-ffp-contract= -ffp-contract=[off|on|fast] Perform floating-
point expression contraction.
-ffpe-summary=[...] Print summary of floating point exceptions.
-ffpe-trap=[...] Stop on following floating point exceptions.
-ffree-line-length-<n> Use n as character line width in free mode.
-fgnat-encodings=[all|gdb|minimal] Select the balance between GNAT encodings
and standard DWARF emitted in the debug
information
-fgo-dump-<type> Dump Go frontend internal information.
-fgo-optimize-<type> Turn on optimization passes in the frontend.
-fgo-pkgpath=<string> Set Go package path.
-fgo-prefix=<string> Set package-specific prefix for exported Go names.
-fgo-relative-import-path= -fgo-relative-import-path=<path> Treat a relative
import as relative to path.
-fhelp= Same as --help=. Use the latter option instead.
-finit-character=<n> Initialize local character variables to ASCII
value n.
-finit-integer=<n> Initialize local integer variables to n.
-finit-logical=<true|false> Initialize local logical variables.
-finit-real=<zero|snan|nan|inf|-inf> Initialize local real variables.
-finline-limit- Same as -finline-limit=. Use the latter option
instead.
-finline-limit=<number> Limit the size of inlined functions to <number>.
-finline-matmul-limit=<n> Specify the size of the largest matrix for which
matmul will be inlined.
-finput-charset=<cset> Specify the default character set for source
files.
-finstrument-functions-exclude-file-list= -finstrument-functions-exclude-file-
list=filename,... Do not instrument functions
listed in files.
-finstrument-functions-exclude-function-list= -finstrument-functions-exclude-
function-list=name,... Do not instrument listed
functions.
-fintrinsic-modules-path= Specify where to find the compiled intrinsic
modules.
-fira-algorithm= -fira-algorithm=[CB|priority] Set the used IRA
algorithm.
-fira-region= -fira-region=[one|all|mixed] Set regions for IRA.
-fira-verbose=<number> Control IRA's level of diagnostic messages.
-fvisibility=[private|protected|public|package] Set the default symbol
visibility.
-flifetime-dse= This option lacks documentation.
-flinker-output= Set linker output type (used internally during
LTO optimization)
-flto-compression-level=<number> Use zlib compression level <number> for IL.
-flto-partition= Specify the algorithm to partition symbols and
vars at linktime.
-flto= Link-time optimization with number of parallel
jobs or jobserver.
-fltrans-output-list= Specify a file to which a list of files output by
LTRANS is written.
-fmax-array-constructor=<n> Maximum number of objects in an array constructor.
-fmax-errors=<number> Maximum number of errors to report.
-fmax-identifier-length=<n> Maximum identifier length.
-fmax-stack-var-size=<n> Size in bytes of the largest array that will be
put on the stack.
-fmax-subrecord-length=<n> Maximum length for subrecords.
-fmessage-length=<number> Limit diagnostics to <number> characters per
line. 0 suppresses line-wrapping.
-fname-mangling-version- This option lacks documentation. Uses of this
option are diagnosed.
-fobjc-abi-version= Specify which ABI to use for Objective-C family
code and meta-data generation.
-foffload-abi= -foffload-abi=[lp64|ilp32] Set the ABI to use
in an offload compiler.
-foffload= -foffload=<targets>=<options> Specify offloading
targets and options for them.
-fopenacc-dim= Specify default OpenACC compute dimensions.
-fopt-info[-<type>=filename] Dump compiler optimization details.
-foutput-class-dir= This option lacks documentation.
-fpack-struct=<number> Set initial maximum structure member alignment.
-fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin
<name>.
-fplugin= Specify a plugin to load.
-fprofile-dir= Set the top-level directory for storing the
profile data. The default is 'pwd'.
-fprofile-generate= Enable common options for generating profile info
for profile feedback directed optimizations, and
set -fprofile-dir=.
-fprofile-use= Enable common options for performing profile
feedback directed optimizations, and set
-fprofile-dir=.
-frandom-seed=<string> Make compile reproducible using <string>.
-freorder-blocks-algorithm= -freorder-blocks-algorithm=[simple|stc] Set the
used basic block reordering algorithm.
-fresolution= The resolution file.
-fsanitize-recover= After diagnosing undefined behavior attempt to
continue execution.
-fsanitize-sections=<sec1,sec2,...> Sanitize global variables in user-defined
sections.
-fsanitize= Select what to sanitize.
-fsched-stalled-insns-dep=<number> Set dependence distance checking in
premature scheduling of queued insns.
-fsched-stalled-insns=<number> Set number of queued insns that can be
prematurely scheduled.
-fsched-verbose=<number> Set the verbosity level of the scheduler.
-fsimd-cost-model= Specifies the vectorization cost model for code
marked with a simd directive.
-fsource-filename= This option lacks documentation.
-fsource= Set the source language version.
-fsso-struct=[big-endian|little-endian] Set the default scalar storage order.
-fstack-check=[no|generic|specific] Insert stack checking code into the
program.
-fstack-limit-register=<register> Trap if the stack goes past <register>.
-fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>.
-fstack-reuse= -fstack-reuse=[all|named_vars|none] Set stack
reuse level for local variables.
-ftabstop=<number> Distance between tab stops for column reporting.
-ftarget= Set the target VM version.
-ftemplate-backtrace-limit= Set the maximum number of template instantiation
notes for a single warning or error.
-ftemplate-depth- Same as -ftemplate-depth=. Use the latter option
instead.
-ftemplate-depth=<number> Specify maximum template instantiation depth.
-ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the
default thread-local storage code generation
model.
-ftrack-macro-expansion This option lacks documentation.
-ftrack-macro-expansion= -ftrack-macro-expansion=<0|1|2> Track locations
of tokens coming from macro expansion and display
them in error messages.
-ftree-parallelize-loops= Enable automatic parallelization of loops.
-ftree-vectorizer-verbose= Does nothing. Preserved for backward
compatibility.
-fvect-cost-model= Specifies the cost model for vectorization.
-fvisibility=[default|internal|hidden|protected] Set the default symbol
visibility.
-fvtable-verify= Validate vtable pointers before using them.
-fwide-exec-charset=<cset> Convert all wide strings and character constants
to character set <cset>.
-fwpa= Whole program analysis (WPA) mode with number of
parallel jobs specified.
-g Generate debug information in default format.
-gant Catch typos.
-gcoff Generate debug information in COFF format.
-gdwarf Generate debug information in default version of
DWARF format.
-gdwarf- Generate debug information in DWARF v2 (or later)
format.
-ggdb Generate debug information in default extended
format.
-gnat<options> Specify options to GNAT.
-gstabs Generate debug information in STABS format.
-gstabs+ Generate debug information in extended STABS
format.
-gvms Generate debug information in VMS format.
-gxcoff Generate debug information in XCOFF format.
-gxcoff+ Generate debug information in extended XCOFF
format.
-gz=<format> Generate compressed debug sections in format
<format>.
-idirafter <dir> Add <dir> to the end of the system include path.
-imacros <file> Accept definition of macros in <file>.
-imultiarch <dir> Set <dir> to be the multiarch include
subdirectory.
-imultilib <dir> Set <dir> to be the multilib include subdirectory.
-include <file> Include the contents of <file> before other files.
-iplugindir=<dir> Set <dir> to be the default plugin directory.
-iprefix <path> Specify <path> as a prefix for next two options.
-iquote <dir> Add <dir> to the end of the quote include path.
-isysroot <dir> Set <dir> to be the system root directory.
-isystem <dir> Add <dir> to the start of the system include path.
-iwithprefix <dir> Add <dir> to the end of the system include path.
-iwithprefixbefore <dir> Add <dir> to the end of the main include path.
-mabi= Specify an ABI.
-march= Specify the name of the target architecture.
-mcpu= Specify the name of the target CPU.
-mfloat-abi= Specify if floating point hardware should be used.
-mfp16-format= Specify the __fp16 floating-point format.
-mfpu= Specify the name of the target floating point
hardware/format.
-mpic-register= Specify the register to be used for PIC
addressing.
-mstructure-size-boundary= Specify the minimum bit alignment of structures.
-mtls-dialect= Specify thread local storage scheme.
-mtp= Specify how to access the thread pointer.
-mtune= Tune code for the given processor.
-o <file> Place output into <file>.
Known ARM ABIs (for use with the -mabi= option):
aapcs aapcs-linux apcs-gnu atpcs iwmmxt
Known ARM architectures (for use with the -march= option):
armv2 armv2a armv3 armv3m armv4 armv4t armv5 armv5e armv5t armv5te armv6
armv6-m armv6j armv6k armv6kz armv6s-m armv6t2 armv6z armv6zk armv7 armv7-a
armv7-m armv7-r armv7e-m armv7ve armv8-a armv8-a+crc armv8-m.base
armv8-m.main armv8-m.main+dsp armv8.1-a armv8.1-a+crc iwmmxt iwmmxt2 native
Known __fp16 formats (for use with the -mfp16-format= option):
alternative ieee none
Known ARM FPUs (for use with the -mfpu= option):
crypto-neon-fp-armv8 fp-armv8 fpv4-sp-d16 fpv5-d16 fpv5-sp-d16 neon
neon-fp-armv8 neon-fp16 neon-vfpv4 vfp vfp3 vfpv3 vfpv3-d16 vfpv3-d16-fp16
vfpv3-fp16 vfpv3xd vfpv3xd-fp16 vfpv4 vfpv4-d16
Valid arguments to -mtp=:
auto cp15 soft
Known floating-point ABIs (for use with the -mfloat-abi= option):
hard soft softfp
Known ARM CPUs (for use with the -mcpu= and -mtune= options):
ar
