The DLL build fails since we stopped setting LIBCXX_ABI_UNSTABLE=TRUE,
if the tests are enabled (which they are if building against a
non-stripped llvm installation).
This version supports SEH for arm64, fixes certain cases of dllexport
of C++ classes defined entirely in headers (fixing building Qt in
debug mode), and fixes a compiler bug (regression since the end of
August 2018) when compiling glslang (as part of VLC) for armv7.
This didn't seem to actually be necessary, not even in the initial
commit adding support for building a DLL of libcxx. It might have
been necessary at some earlier point while working on building a DLL.
This is set via a cmake option when building libcxx, but libcxxabi
uses the raw libcxx headers from its include directory before they
are installed.
This fixes cases of inconsistent classes seen while compiling libcxxabi
and libcxx. With potential future patches to clang to adjust how
classes are exported with dllexport, this change is needed to avoid
conflicts.
If the triplet directory is wiped and only the build-mingw-w64.sh
step is rerun, the bin subdirectory would be missing, ending up
with a file named "bin", which actually was the libc++ DLL.
This option seems to be used occasionally by projects to work around
various issues with popen in GNU windres.
Our windres wrapper always uses a temp file for the preprocessing
output, so for us the option is a no-op.
Convert paths with backslashes to forward slashes.
libtool tries to parse this output in order to find object files and
libraries that always should be linked in, but libtool can't handle
paths with backslashes (and quotes) which clang currently outputs.
This is a quick and ugly workaround until clang can be made to
output paths with forward slashes on windows, see
https://reviews.llvm.org/D53066 for progress on that matter.
This fixes the _isdigit_l function for UCRT, fixing iostream formatting
of numbers in certain cases, in cases e.g. like this:
double test = 1.0 / 3.0;
std::cout << test << std::endl;
This makes the help output from llvm-nm contain keywords that libtool
may look for, makes combined compilation and linking with -flto in
one command work, fixes a bug with alignment of locally imported
symbols on arm64, allows using linker directives for specifying
default libraries to link, and allows linking to undefined behaviour
sanitizer.
Martin Storsjö