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$? refers to the object files that are newer, so the resulting file
would lack all the older object files.
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gives 2-5% performance improvement across a board of tests.
LTO is broken when using clang; some libs link fine while others crash
the linker with a segfault in the llvm linker plugin. š
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Restart the tests (at most once) on `unexpected EOF` errors.
This is truly ugly, but might prevent half of the CI runs to fail
because of https://github.com/NixOS/nix/issues/3605
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It's a second attempt to merge the change. Previous attempt
was reverted in b976b34a5b05ba303904cc7b8e0a2579bdb52807.
Since then underlying failure exposed by original change was
fixed by https://github.com/NixOS/nix/pull/5354.
Below goes description of original change:
The link failure happens on a system with stable nix-2.3.15
installed in /usr/lib64 (it's libutil.so API differs from master):
```
LANG=C make V=1
g++ -o /home/slyfox/dev/git/nix/src/libstore/libnixstore.so \
-shared -L/usr/lib64 -Wl,--no-copy-dt-needed-entries \
src/libstore/binary-cache-store.o ... src/libstore/uds-remote-store.o \
-lsqlite3 -lcurl -lsodium -pthread -ldl -lseccomp -Wl,-z,defs -Wl,-soname=libnixstore.so
-Wl,-rpath,/home/slyfox/dev/git/nix/src/libutil -Lsrc/libutil -lnixutil
ld: src/libstore/binary-cache-store.o: in function `nix::BinaryCacheStore::BinaryCacheStore(
std::map<std::__cxx11::basic_string<char, std::char_traits<char>, ...
nix/src/libstore/binary-cache-store.cc:30: undefined reference to `nix::readFile(
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' ...
...
```
This happens due to `-L/usr/lib64 -Lsrc/libutil` search path ordering.
The change turns it into `-Lsrc/libutil -L/usr/lib64`.
Closes: https://github.com/NixOS/nix/issues/3087
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Noticed this minor logging deficiency when debugged --disable-shared
build:
LD
AR
LD
CXX src/libstore/local-store.o
After the change build is logged as expected:
LD src/libmain/libnixmain.a
LD src/libfetchers/libnixfetchers.a
AR src/libmain/libnixmain.a
CXX src/libstore/local-store.o
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This reverts commit 4993174be59adc688efad49f2f9205688bd2ee26.
buildStatic.x86_64-linux and buildStatic.aarch64-linux were broken, see https://hydra.nixos.org/build/151755012
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The link failure happens on a system with stable nix-2.3.15
installed in /usr/lib64 (it's libutil.so API differs from master):
```
LANG=C make V=1
g++ -o /home/slyfox/dev/git/nix/src/libstore/libnixstore.so \
-shared -L/usr/lib64 -Wl,--no-copy-dt-needed-entries \
src/libstore/binary-cache-store.o ... src/libstore/uds-remote-store.o \
-lsqlite3 -lcurl -lsodium -pthread -ldl -lseccomp -Wl,-z,defs -Wl,-soname=libnixstore.so
-Wl,-rpath,/home/slyfox/dev/git/nix/src/libutil -Lsrc/libutil -lnixutil
ld: src/libstore/binary-cache-store.o: in function `nix::BinaryCacheStore::BinaryCacheStore(
std::map<std::__cxx11::basic_string<char, std::char_traits<char>, ...
nix/src/libstore/binary-cache-store.cc:30: undefined reference to `nix::readFile(
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' ...
...
```
This happens due to `-L/usr/lib64 -Lsrc/libutil` search path ordering.
The change turns it into `-Lsrc/libutil -L/usr/lib64`.
Closes: https://github.com/NixOS/nix/issues/3087
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Previously, the build system used uname(1) output when it wanted to
check the operating system it was being built for, which meant that it
didn't take into-account cross-compilation when the build and host
operating systems were different.
To fix this, instead of consulting uname output, we consult the host
triple, specifically the third "kernel" part.
For "kernel"s with stable ABIs, like Linux or Cygwin, we can use a
simple ifeq to test whether we're compiling for that system, but for
other platforms, like Darwin, FreeBSD, or Solaris, we have to use a
more complicated check to take into account the version numbers at the
end of the "kernel"s. I couldn't find a way to just strip these
version numbers in GNU Make without shelling out, which would be even
more ugly IMO. Because these checks differ between kernels, and the
patsubst ones are quite fiddly, I've added variables for each host OS
we might want to check to make them easier to reuse.
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mk: add support for CPPFLAGS
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Requires a slight update to the test infra to work properly, but
having the possibility to group tests that way makes the whole thing
quite cleaner imho
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This reverts commit 259086de841d155f7951c2cc50f799a4631aa512.
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We're not producing source tarballs anymore so this has been
bitrotting.
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"clang++" includes the string "g++" so this test didn't work
properly. However the separate handling of clang might not be needed
anymore...
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They're still enabled in regular builds though.
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For some reason, the bash shell started by 'nix develop' sometimes
reads from stdin, which can hang.
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In cross, CXX will look like aarch64-unknown-linux-gnu-g++. We could
run some command to check what kind of compiler it is, but for now we
can just check if g++ is anywhere in the string. I couldnāt find any
"ends with" for makefile, so it can be anywhere in CXX.
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Fix a socket length failure on the OSX builders
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Reuse the pre-existing list rather than the one written as part of #3777
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Cause the time needed to run the testsuite to drop from ~4mins to ~40s
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This combines the *.o into a big .o producing one translation unit.
This preserve our unused static initializers, as specified in the C++
standard:
If no variable or function is odr-used from a given translation
unit, the non-local variables defined in that translation unit may
never be initialized (this models the behavior of an on-demand
dynamic library).
Note that this is very similar to how the --whole-archive flag works.
One advantage of this is that users of the final .a library donāt have
to worry about specifying --whole-archive, or that we have unused
static initializers at all!
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(cherry picked from commit 2c692a3b144523bca68dd6de618124ba6c9bb332)
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The make-rules repo is not maintained.
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It's now regenerated when util.hh changes, and is ordered after
config.h to fix a race.
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This cuts 'make install -j6' on my laptop from 170s to 134s.
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autotools-based systems usually allow user to
append own LDFLAGS like
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu"
at ./configure stage
This change plumbs LDFLAGS through similar to existing CXXFLAGS variable.
Signed-off-by: Sergei Trofimovich <siarheit@google.com>
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This tells Nix to not build the shared libraries.
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All plugins in plugin-files will be dlopened, allowing them to
statically construct instances of the various Register* types Nix
supports.
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In this mode, the following restrictions apply:
* The builtins currentTime, currentSystem and storePath throw an
error.
* $NIX_PATH and -I are ignored.
* fetchGit and fetchMercurial require a revision hash.
* fetchurl and fetchTarball require a sha256 attribute.
* No file system access is allowed outside of the paths returned by
fetch{Git,Mercurial,url,Tarball}. Thus 'nix build -f ./foo.nix' is
not allowed.
Thus, the evaluation result is completely reproducible from the
command line arguments. E.g.
nix build --pure-eval '(
let
nix = fetchGit { url = https://github.com/NixOS/nixpkgs.git; rev = "9c927de4b179a6dd210dd88d34bda8af4b575680"; };
nixpkgs = fetchGit { url = https://github.com/NixOS/nixpkgs.git; ref = "release-17.09"; rev = "66b4de79e3841530e6d9c6baf98702aa1f7124e4"; };
in (import (nix + "/release.nix") { inherit nix nixpkgs; }).build.x86_64-linux
)'
The goal is to enable completely reproducible and traceable
evaluation. For example, a NixOS configuration could be fully
described by a single Git commit hash. 'nixos-rebuild' would do
something like
nix build --pure-eval '(
(import (fetchGit { url = file:///my-nixos-config; rev = "..."; })).system
')
where the Git repository /my-nixos-config would use further fetchGit
calls or Git externals to fetch Nixpkgs and whatever other
dependencies it has. Either way, the commit hash would uniquely
identify the NixOS configuration and allow it to reproduced.
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Also, don't depend on tput (ncurses). It's really not needed since
ANSI escape sequences have been standardized for 35 years or so.
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This fixed the build on ubuntu/debian, where dash is the sh.
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I got sick of trying to find the failures in the sea of debug output, so
we now:
- Hide test output unless it fails
- Sprinkle in some simple color
- Pad results for a more tabular look
If Nix is getting a more friendly user interface, we might as well get
a friendlier developer interface, right? :)
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this is needed for pipe2()
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This reverts commit f78126bfd6b6c8477fcdbc09b2f98772dbe9a1e7. There
really is no need for such a massive change...
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Eventually the nested if statements should be replaced by a more general
condition, but this is sufficient to make it work on FreeBSD.
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1. Shared lib extension is .dll
2. Shared libs are installed to $(prefix)/bin
3. Linker does not support -z flag
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