Static destructors cause the destructor for a global object to run when
the program exits. They are bad because:
1. Registering them takes time and memory at startup
2. Running them takes time at shutdown and also they may have weird
interactions.
This shaves about 12k off of the binary size.
Unfortunately gcc does not support this flag.
glibc 2.30 and up emit an ugly depreciation warning on
`#include <sys/sysctl.h>` - this patch makes the build system fail the
include test for `sys/sysctl.h` by forcibly setting `-Werror` before the
call to `check_include_files` (which internally uses `try_compile`) to
get `HAVE_SYS_SYSCTL` to not be defined (even if it's there) if it would
cause such a depreciation message to be emitted.
Ideally, we would not have to manually massage `CMAKE_C_FLAGS` before
calling `check_include_files` and could just tweak that to either always
or conditionally try compilation with `-Werror`, but try_compile doesn't
actually use any overridden `CMAKE_C_FLAGS` values [0] (dating back to
2006).
[0]: https://cmake.org/pipermail/cmake/2006-October/011649.html
In most cases, like math, we want C-semantics for floating point
numbers. In particular "." needs to be the decimal separator.
Instead, we pay the price in printf, which is currently the sole place
to output in locale-specific numbers and attempt to read them and
C-style ones.
- Only check for HAVE_CLOCK_GETTIME and HAVE_FUTIMENS on Linux, since
they are only used to implement a Linux-specific workaround related
to mtime precision.
- Make sure that hack is limited to Linux builds
- HAVE_SYS_SYSCTL_H was unused, but we should have been using it
- HAVE_TERMIOS_H was unused, remove it
The only functional change is that unix machines with clock_gettime
and futimens will not bother with a Linux-specific hack, and won't
waste time checking for either during cmake configuration either.
* Remove safe_strerror, safe_perror and safe_append
This no longer works on new glibcs because they removed sys_errlist.
So just hardcode the relevant errno messages (and phrase them better).
Fixes#4183.
Co-authored-by: Johannes Altmanninger <aclopte@gmail.com>
The only thing we know ever triggered this is old macOS versions,
there's no need to use it for everyone else.
Since this uses try_run it breaks when cross-compiling, which
shouldn't be a common thing on macOS.
Fixes#7737
This was a typo. CMake doesn't take comma-separated arguments, but if
you do add the comma it tends to work, because it just takes that
comma as part of the string. So if it takes a directory to work in,
that it will then create, and you pass
${CMAKE_CURRENT_BINARY_DIR},
well, that might just create a "build," directory.
It's not entirely clear why the existing check does not work, but it seems to pass on clang++ even without -latomic, but causes the fish build to fail later.
Confirmed that with this change, g++ does not use -latomic, while clang++ does, and fish builds fine with both.
When CMake's own curses logic fails to find curses/ncurses, we fall back to
pkg-config and manually link the required libraries. Some platforms (RHEL 6,
see #6587) require CURSES_EXTRA_LIBRARY=tinfo, so we link against libtinfo
if it's found but are happy to continue without it if it doesn't exist.
Closes#6587
- Define it before the headers so they can pick the variadic tparm
prototype.
- We need a TPARM_VARARGS define, add it to config_cmake.h.
- Move & adjust comment - put it near the code, and mentiont that
NetBSD curses doesn't need the kludge.
Now variadic tparm is used on NetBSD instead of the Solaris kludge.
Two blocks of code were trying to do the same thing in different ways;
standardise on one, and only add the compile flags if CMake won't do it
itself (policy CMP0067).
Work around the issue in CMake where C++ standard doesn't get propagated
to CHECK_CXX_SOURCE_COMPILES. Also correctly check for std::make_unique;
the define was missing from the config.h header.
GCC 4.8 requires the use of `-std=gnu++11` or similar to enable atomic
features. However, older versions of CMake don't pick up the
project-wide target for C++11 when building the configure check targets.
Although CMake policy 0067 could be set to NEW to enable this, it only
exists on CMake 3.8 and newer, while many of our supported platforms are
on an older version.
780bac671f did not actually successfully
compile on any platforms, leading to -latomic always being added
(including on platforms it does not exist on).
Work on #5865.
This adds an option --print-rusage-self to the fish executable. When set,
this option prints some getrusage stats to the console in a human-readable
way. This will be used by upcoming benchmarking support.
The compiler flag `-Werror=unguarded_availability` was hard-coded for
macOS, but is not supported by GCC on macOS 10.10 (Yosemite). Test for
support with CHECK_CXX_COMPILER_FLAG before forcing it.
This was broken in a8eb02f9f5 when the
detection was corrected for FreeBSD. This patch makes the detection work
for both Linux and FreeBSD instead of one or the other (tested).
CMake seems to have trouble finding libraries from multiarch packages
that do not have the compatibility symlink installed to the
arch-independent library directory. Users must either manually supply
the path to the library in question via command-line parameters or we
can fall back to CMake's alternate method of finding packages based off
of pkg-config rather than using the hard-coded `FindCurses` CMake module
specific to the CMake version/distribution installed.
