Changes during post-3.3/pre-3.4 development refactored storage of most
configure-time information, including variable bindings and function
scopes. All scopes (even short-lived) were kept persistently for
possible future debugging features, causing huge accumulated memory
usage. This was mostly addressed by commit v3.4.1~4^2 (cmState: Avoid
accumulating snapshot storage for short-lived scopes, 2015-11-24).
Since then we still keep short-lived scopes when they are needed for a
backtrace. This is because since commit v3.4.0-rc1~378^2
(cmListFileBacktrace: Implement in terms of cmState::Snapshot,
2015-05-29) backtraces have been lightweight objects that simply point
into the snapshot tree. While the intention of this approach was to
avoid duplicating the call stack file path strings, the cost turned out
to be holding on to the entire call stack worth of scope snapshots,
which is much worse.
Furthermore, since commit v3.4.0-rc2~1^2 (cmIfCommand: Issue CMP0054
warning with appropriate context, 2015-10-20) all conditions used in
`if()` commands hold a backtrace for use in diagnostic messages. Even
though the backtrace is short-lived it still causes the scope snapshot
to be kept. This means that code like
function(foo)
if(0)
endif()
endfunction()
foreach(i RANGE 1000000)
foo()
endforeach()
accumulates storage for the function call scope snapshots.
Fix this by partially reverting commit v3.4.0-rc1~378^2 and saving the
entire call stack during cmListFileBacktrace construction. This way
we can avoid keeping short-lived scope snapshot storage in all cases.
In commit v2.8.4~32^2~14 (Use cmake::IssueMessage for warnings,
2010-12-07) these warnings became formatted. It is more informative to
give the full call stack with such warnings. Also it is easier to
implement warnings with a full call stack because we do not have to
construct a custom backtrace with only the top.
This method was added by commit v3.4.0-rc1~424^2~6 (cmLocalGenerator:
Add IssueMessage method, 2015-06-13) in order to reduce callers'
dependency on cmMakefile. Currently the implementation of
cmLocalGenerator::IssueMessage is just a copy of the post-configure code
path in cmMakefile::IssueMessage. De-duplicate the implementation by
simply calling the cmMakefile copy for now. This will simplify upcoming
refactoring of backtraces. The dependency on cmMakefile can be removed
by future work once that is done.
Create a <LANG>_CLANG_TIDY target property (initialized by a
CMAKE_<LANG>_CLANG_TIDY variable) to specify a clang-tidy command line
to be run along with the compiler.
In the `try_compile` source file signature we propagate the caller's
value of `CMAKE_<LANG>_FLAGS` into the test project. Extend this to
propagate `CMAKE_<LANG>_FLAGS_<CONFIG>` too instead of always using the
default value in the test project. This will be useful, for example, to
allow the MSVC runtime library to be changed (e.g. `-MDd` => `-MTd`).
a1c40291 GetPrerequisites: Look for VS tools using environment variables
c79f88b0 GetPrerequisites: add path of VS 10,11,12,14 in order to find dumpbin.exe
The Custom-Symbolic-and-Byproduct case fails strangely on some
filesystems used by our nightly testing. Somehow on the first build the
`use-byproduct` output ends up with a timestamp older than
`gen-byproduct-stamp` even though the build log clearly shows them build
in the correct order (and must according to build system dependencies).
Work around this problem by adding an extra delay before building
`use-byproduct`.
Tested-by: Gerhard Grimm <gerhard.grimm@detec.com>
7731e44f Ninja: Honor CMAKE_NINJA_FORCE_RESPONSE_FILE for compile rules
f9644a2d cmGlobalNinjaGenerator: Clarify logic for forcing use of response files
24c9106b cmNinjaTargetGenerator: Factor out helper for forced response file check
The `VS*COMNTOOLS` environment variables specify locations of VS tools
and are set during the VS installation. Use them in addition to the
hard-coded default install locations.
We define `NDEBUG` without a space after the `-D` option for most
compilers. Remove the space for MSVC (and Intel Fortran) for
consistency. The MS compiler technically does not document that
the `-D` argument may be separated from its value, though every
version to date supports it.
Dominic Meiser
Stafen Teleman
Brad King
Kitware Robot
Daniel Pfeifer
Christoph Grüninger
FARBOS Arnaud
Dmitry Ivanov