Mehdi suggested in a review of r259766 that it's also useful to easily
set the type of LTO. Augment the cmake variable to support that.
llvm-svn: 260143
Enable more strict standards conformance in MSVC for rvalue casting and string literal type conversion to non-const types. Also enables generation of intrinsics for more functions.
Patch by Alexander Riccio
llvm-svn: 258687
I think I fixed all instances of this in the codebase
(r258202, 258200, 258190). Also, the suppression didn't
have an effect on bots using make anyways, and it looks
like many bots still use configure/make bots.
llvm-svn: 258210
LLVM_ENABLE_TIMESTAMPS controls if timestamps are embedded into llvm's
binaries. Turning it off is useful for deterministic builds.
r246905 made it so that the define suddenly also controls if the binaries that
the llvm binaries _create_ embed timestamps or not – but this shouldn't be a
configure-time option. r256203/r256204 added a driver option to toggle this on
and off, so this patch now passes this driver option in LLVM_ENABLE_TIMESTAMPS
builds so that if LLVM_ENABLE_TIMESTAMPS is set, the build of LLVM is
deterministic – but the built clang can still write timestamps into other
executables when requested.
This also allows removing some of the test machinery added in r292012 to work
around this problem.
See PR24740 for background.
http://reviews.llvm.org/D15783
llvm-svn: 256958
This should fix many many -Wunused-parameter warnings in self-host builds on
Windows after r255382. cl.exe doesn't care about the order of /W4 and
/wd flags, but clang-cl currently does (just like -Wno-foo -Wall order
matters for clang). We might want to change how clang-cl behaves in
the future, but until then this change makes self-host builds much more
silent.
llvm-svn: 256315
Clang has better diagnostics in this case. It is not necessary therefore
to change the destructor to avoid what is effectively an invalid warning
in gcc. Instead, better handle the warning flags given to the compiler.
llvm-svn: 255905
This is the first step in supporting PGO data generation via CMake. I've marked the option as advanced and experimental until it is fleshed out further.
llvm-svn: 255298
This is similar to the fix for FreeBSD in r226862. Without this patch,
the build aborts when linkling libLTO.so, complaining about undefined
references to assert2, cxa_atexit, etc.
Patch by Stefan Kempf!
http://reviews.llvm.org/D14236
llvm-svn: 253769
I'm unaware of any reasons why -fvisibility-inlines-hidden would depend on PIC, and since autoconf supports this flag without PIC, we should support it in CMake too.
llvm-svn: 253517
This reverts commit r248963.
Seems there's some standard libraries (and libcxxabi implementations)
that aren't -Wdeprecated clean... hrm.
llvm-svn: 248972
This particularly helps enforce the C++ Rule of 5 (for new move ops this
is already an error, but for a type only using C++98 features (copy
ctor/assign, dtor) it is only deprecated, not invalid)
Applying the flag for any GCC compatible compiler - GCC doesn't warn on
the Rule of 5 cases that C++11 deprecates, but it doesn't have other
false positives so far as I could see (compiling with GCC 4.8 didn't
produce any -Wdeprecated warnings I could spot).
Reviewers: aaron.ballman
Differential Revision: http://reviews.llvm.org/D13314
llvm-svn: 248963
Currently, if you call cmake with a typo in an LLVM_USE_SANITIZER
value, there's a cmake warning and the build goes on with no
sanitizers at all. This isn't a good behaviour, since cmake warnings
are fairly easy to miss and the resulting behaviour is that it looks
like the build is sanitizer clean.
Upgrade these warnings to errors so misconfigurations are more
obvious.
llvm-svn: 246531
such as std::equal on the third argument. This reverts previous workarounds.
Predefining _DEBUG_POINTER_IMPL disables Visual C++ 2013 headers from defining
it to a function performing the null pointer check. In practice, it's not that
bad since any function actually using the nullptr will seg fault. The other
iterator sanity checks remain enabled in the headers.
Reviewed by Aaron Ballmanþ and Duncan P. N. Exon Smith.
llvm-svn: 245711
This allows asm files and Cxx files to be compiled with different flags
rather than treating them identically. LLVM itself has no asm files
other than tests, but this setting is inherited by the compiler-rt
project (unless compiled standalone), which does have asm files.
Differential Revision: http://reviews.llvm.org/D10707
llvm-svn: 243419
Prior to CMAKE 2.8.4 that was covered by the WIN32 conditional but
from 2.8.4 CMAKE no longer defined WIN32 when running under Cygwin
and it needs its own test.
Patch by Martell Malone!
http://reviews.llvm.org/D11347
llvm-svn: 242993
I can't actually test this properly because uninstalling MSVC 2015 CTP 6
and reinstalling the 2015 RC takes hours. I can only verify that this
doesn't mess up MSVC 2013 and 2015 CTP 6 builds, which is what I've
done.
Should fix PR23513.
llvm-svn: 237743
Certain versions of CMake specify /W3 as part of CMAKE_CXX_FLAGS
by default, before you do anything. Appending /W4 to the end of
this and using the Ninja generator results in
cl : Command line warning D9025 : overriding '/W3' with '/W4'.
It is not possible to suppress this since it is a command line
warning and not a compiler warning, so we must fix the command
line to contain only one value for /Wn.
llvm-svn: 234907
Unfortunately, on ELF there is not used attribute on the .o files,
so there is no easy way to keep the dump function alive.
If we are not gcing, we may as well produce non gcable files and
avoid the cost.
Linking a debug clang now takes 18.856225992 seconds, before it
took 21.206897447.
I will try avoiding --gc-sections -O3 on a followup patch.
llvm-svn: 234159
Summary:
This patch is an attempt at making `DenseMapIterator`s "fail-fast".
Fail-fast iterators that have been invalidated due to insertion into
the host `DenseMap` deterministically trip an assert (in debug mode)
on access, instead of non-deterministically hitting memory corruption
issues.
Enabling fail-fast iterators breaks the LLVM C++ ABI, so they are
predicated on `LLVM_ENABLE_ABI_BREAKING_CHECKS`.
`LLVM_ENABLE_ABI_BREAKING_CHECKS` by default flips with
`LLVM_ENABLE_ASSERTS`, but can be clamped to ON or OFF using the CMake /
autoconf build system.
Reviewers: chandlerc, dexonsmith, rnk, zturner
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D8351
llvm-svn: 233310
NFC currently but required as a prerequisite for using
the Microsoft resource compiler in conjunction with
CMake's ninja generator, which knows how to filter flags
appropriately, but not definitions.
Differential Revision: http://reviews.llvm.org/D8188
llvm-svn: 232727
NFC currently but required as a prerequisite for using
the Microsoft resource compiler in conjunction with
CMake's ninja generator, which knows how to filter flags
appropriately, but not definitions.
Differential Revision: http://reviews.llvm.org/D8188
llvm-svn: 231924
Introduce -mllvm -sanitizer-coverage-8bit-counters=1
which adds imprecise thread-unfriendly 8-bit coverage counters.
The run-time library maps these 8-bit counters to 8-bit bitsets in the same way
AFL (http://lcamtuf.coredump.cx/afl/technical_details.txt) does:
counter values are divided into 8 ranges and based on the counter
value one of the bits in the bitset is set.
The AFL ranges are used here: 1, 2, 3, 4-7, 8-15, 16-31, 32-127, 128+.
These counters provide a search heuristic for single-threaded
coverage-guided fuzzers, we do not expect them to be useful for other purposes.
Depending on the value of -fsanitize-coverage=[123] flag,
these counters will be added to the function entry blocks (=1),
every basic block (=2), or every edge (=3).
Use these counters as an optional search heuristic in the Fuzzer library.
Add a test where this heuristic is critical.
llvm-svn: 231166
This allows clang-cl to self-host cleanly with no magic setup
steps required.
After this patch, all you have to do is set CC=CXX=clang-cl and
run cmake -G Ninja.
These changes only exist to support C++ features which are
unsupported in clang-cl, so regardless of whether the user
specifies they want to use them, we still have to disable them.
llvm-svn: 230539
If we're using clang-cl, that's a pretty good indication that we're
going to use MSVC's STL.
This simplifies the clang-cl ninja self-host configuration down to:
CC=clang-cl CXX=clang-cl cmake .. -GNinja
Modified version of zturner's patch:
Differential Revision: http://reviews.llvm.org/D7824
llvm-svn: 230239
Previous versions of MSVC 2013 would miscompile ASTMatchers (and/or their
tests). Bump up the requirement and make sure we know about the minor
revision.
Minimum required version found by Michael Edwards!
llvm-svn: 229584
Summary:
Handle LLVM_USE_SANITIZER=Address;Undefined to enable ASan and UBSan
If UBSan is compatible with more of the other sanitizers, maybe we should
deal with this in a better way where we allow combining UBSan with any of
the other sanitizers.
Reviewers: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7024
llvm-svn: 228219
Summary:
When LLVM_USE_SANITIZE_COVERAGE=YES
and one of the sanitizers is used -fsanitize-coverage=3 will be added
to build flag. This will be used to run a coverage-guided fuzzer on various
llvm libraries.
Test Plan: n/a
Reviewers: rnk
Reviewed By: rnk
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7116
llvm-svn: 227216
ELF linkers by default allow shared libraries to contain undefined references
and it is up to the dynamic linker to look for them.
On COFF and MachO, that is not the case.
This creates a situation where a .so might build on an ELF system, but the build
of the corresponding .dylib or .dll will fail.
This patch changes the cmake build to use -Wl,-z,defs when linking and updates
the dependencies so that -DBUILD_SHARED_LIBS=ON build still works.
llvm-svn: 226611
Presumably it was added to the CMake system when MAXPATHLEN was still
used by code built for Windows. Currently only lib/Support/Path.inc uses
MAXPATHLEN, and it should be available on all Unices.
llvm-svn: 223139
Summary: This will help in testing libc++ and libc++abi with tsan.
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: samsonov, llvm-commits
Differential Revision: http://reviews.llvm.org/D6283
llvm-svn: 222258
IMO we need to clean up some of these, but the member variable one
(C4458) has false positives on static methods. It is currently firing
on Twine, which has a static method like:
struct Twine {
uintptr_t LHS, RHS;
static void staticMethod() {
// warning C4458: declaration of 'LHS' hides class member
uintptr_t LHS;
...
}
};
We should fix up clang's -Wshadow and clean it up, and then we can
re-enable some of these MSVC warnings.
llvm-svn: 221012
This would cause the flag to appear in the output of "llvm-config --cppflags",
which should contain only preprocessor flags. The -gsplit-dwarf flag in
particular can cause problems with certain downstream users such as cgo.
Differential Revision: http://reviews.llvm.org/D5895
llvm-svn: 220410
This test was testing nothing, as only -Werror was ever
being added to the compiler flags.
You can see the final nitty-gritty compiler invocation in
CMakeFiles/CMakeOutput.log (for successful tests) and
CMakeFiles/CMakeError.log (for failed tests).
Before:
Building C object CMakeFiles/cmTryCompileExec3385359576.dir/src.c.o
/usr/bin/clang -fPIC -Wall -W -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -DC_WCOMMENT_ALLOWS_LINE_WRAP -Werror -o CMakeFiles/cmTryCompileExec3385359576.dir/src.c.o -c /home/nobled/code/llvm-b9/CMakeFiles/CMakeTmp/src.c
After:
Building C object CMakeFiles/cmTryCompileExec3385359576.dir/src.c.o
/usr/bin/clang -fPIC -Wall -W -Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -DC_WCOMMENT_ALLOWS_LINE_WRAP -Werror -Wcomment -o CMakeFiles/cmTryCompileExec3385359576.dir/src.c.o -c /home/nobled/code/llvm-b9/CMakeFiles/CMakeTmp/src.c
llvm-svn: 216328
clang has only been smart enough not to trigger -Wnon-virtual-dtor
warnings on final classes since r208449 (in clang 3.5). Building
with older versions is extremely noisy, so disable the warning
on those compilers.
llvm-svn: 216327
to globally be controlled. Individual targets (e.g. ExceptionDemo) can
still override this by using LLVM_REQUIRE_RTTI and LLVM_REQUIRE_EH if
they need to be compiled with RTTI or exception handling respectively.
llvm-svn: 213663
This -f group flag appears to influence linker flags, breaking the usual rules
and causing CMake's link invocation to fail during feature detection due to
missing link dependencies (msan_*).
Let's forcibly add it for now to get things the way they were before feature
detection started working.
llvm-svn: 212590
When LLVM_ENABLE_TIMESTAMPS has been disabled we can prevent the preprocessor
from embedding dates, times and file timestamps.
There are a few motivations for this:
1) Validate the recent CMake feature detection bugfix from LLVM r212586 with
a flag that's not actually available everywhere.
2) Dogfood clang's new -Wdate-time warning from r210511 when bootstrapping.
3) Encourage reproducible builds.
llvm-svn: 212587
add_flag_if_supported() and add_flag_or_print_warning() were effectively
no-ops, just returning the value of the first result (usually
'-fno-omit-frame-pointer') for all subsequent checks for different flags.
Due to the way CMake caches feature detection results, we need to provide
symbolic variable names which will persist the cached results. This commit
fixes feature detection using these two macros.
The feature checks now run and get stored correctly, and the correct output can
be observed in configure logs:
-- Performing Test C_SUPPORTS_FPIC
-- Performing Test C_SUPPORTS_FPIC - Success
-- Performing Test CXX_SUPPORTS_FPIC
-- Performing Test CXX_SUPPORTS_FPIC - Success
llvm-svn: 212586
FIXME: Make this configurable.
FIXME: "ENABLE_SHARED" doesn't make sense, since it is used just for plugins. We may rename it.
I introduced config.enable_shared in r120273.
llvm-svn: 212315
By default, CMake will set NDEBUG in Rel* builds and leave it off in
debug builds, so we shouldn't need to do anything ourselves.
Before this change, it was possible to a Debug build without assertions
(aka Debug-Asserts in the autoconf system) by configuring with
-DLLVM_ENABLE_ASSERTIONS=OFF, but this configuration isn't very useful.
You can still get the same effect by explicitly adding -DNDEBUG to
CFLAGS.
Differential Revision: http://reviews.llvm.org/D4257
Patch by Janusz Sobczak!
llvm-svn: 211919
add_definitions shouldn't really be used for compiler flags, and the variable
LLVM_DEFINITIONS is not appropriately used at the moment, e.g. it's not exported
to LLVMConfig.cmake
llvm-svn: 203792
I personally build with these settings enabled all the time, and it
is clearer to see the actual warning flags (e.g., -Wuninitialized)
get passed by Xcode rather than seeing -Wno-uninitialized followed
by -Wall (the latter canceling out the former) and figuring out
what is going on.
Xcode will ignore build settings it doesn't understand, so this will
work on possibly older versions of Xcode that don't support all
of these settings.
llvm-svn: 203760
FIXME: llvm/test may be aware of LLVM_PLUGIN_EXT, like as clang/test does.
FIXME: CMAKE_*_SUFFIX may be set in HandleLLVMOptions if those variables could be writable, rather than to set one as target properties.
llvm-svn: 201316
r200744 moved this into cmake/config-ix.cmake, so that it would happen very
early in the build process. However, standalone builds of Clang and other
external projects never include this file (which is correct).
Now, -stdlib=libc++ and the LLVM_COMPILER_IS_GCC_COMPATIBLE option are
both set in a new include file, HandleLLVMStdlib, which is included by
both config-ix.cmake and HandleLLVMOptions.cmake. This preserves existing
behavior for projects relying on HandleLLVMOptions and still does the
right thing for builds of LLVM itself.
llvm-svn: 200811
If LLVM_ENABLE_LIBCXX is specified, we should append -stdlib=libc++ to build
flags as early as possible, in particular, before we check for header presence
(as -stdlib=libc++ modifies header lookup rules). Otherwise we can find a header
at configure time (w/o -stdlib=libc++) but fail to find it at build time
(with -stdlib=libc++). See PR18569 for more details.
llvm-svn: 200744
LLVM_REQUIRES_EH implies LLVM_REQUIRES_RTTI. It is as same behavior as Makefile.rule's.
llvm/examples/ExceptionDemo is affected. (It was built with -fno-rtti.)
For MSVC, Remove flags like "/EHsc /GR" in HandleLLVMOptions, or CL.EXE complains with flags like "/GR /GR-".
llvm_update_compile_flags() updates source file property if the target contains *.c.
COMPILE_FLAGS in target properties affects both C++ and C!
LLVM_NO_RTTI is deprecated. It was introduced by me and was my mistake.
llvm-svn: 200301
Reid Kleckner