Add unittest to test collection of C sources and headers

fix typo(s)

reduce dependency on the working directory ...

Improves library API usage and bugs with the build generator

Reduce dependency on `std.file` (#2547)

Fix unittest for platform probe on Windows

Posix: Add default SONAME/install_name for dynamic libraries ...

Setting it to the filename (ELF) or `@rpath/<file name>` (Mach-O).

This seems to be required in order to use the libraries copied to
the output directory of dependees - either by setting the
LD_LIBRARY_PATH env var when starting the executable, or baking a
RUNPATH into the executable (e.g., via `patchelf --set-rpath` for
deployment).

Otherwise the loader tries to load the library from the original
location specified in the linking cmdline, which is some
`<path to dep pkg>/.dub/…` path (and apparently potentially
relative, and thus even more brittle). For ELF, I would assume
that all SONAME + DT_NEEDED entries (of executable + all .so libs)
would need to be post-processed to enable loading the libs from the
executable's directory (well, any non-original location).

Forward flag `--color={on,off}` to compiler calls (#2382) ...

When the user sets the color mode explicitly,
we forward it to the compiler for consistency,
while making sure it doesn't impact the build cache ID.

Fix x86 OMF support ...

Allowlist -m32omf "linker" flag

Keep logging functionality out of the public API as requested in https://github.com/dlang/dub/pull/2124#issuecomment-813016939.

New logging module - initial functionality ...

The new module replaces dub.internal.vibecompat.core.log by using the
same function names, but implementing colored output and the left
fixed-width tag. Overloaded functions are provided to output colored
text.

Still missing initLogging() and non-TTY stdout/stderr detection

compilers: Change lflagsToDFlags to avoid scope escape ...

If 'in' implies 'scope', then the parameter is being escaped.

Merge pull request #2259 from rikkimax/fix-issue2258 ...

Fix issue 2258 where dependency target binaries are not copied

Signed-off-by: Nicholas Wilson <thewilsonator@users.noreply.github.com>
Merged-on-behalf-of: Nicholas Wilson <thewilsonator@users.noreply.github.com>

Refactor checks for platform is Windows into a method on BuildPlatform

Add support for coverage at compile-time (CTFE)

Adapt determinePlatform to the new defaults for Win32 ...

Starting with DMD 2.099, `-m32` defaults to MsCOFF instead of OMF and
`-m32omf` is required to use the OMF format + OPTLINK.

This commit changes the logic to select the appropriate logic based
on the current compiler version. Potentially using the wrong object file
format during platform probing is fine because the codegen is skipped
(dmd is invoked with `-c -o-`).

Print architecture when unittest fails

add UnsupportedArchitecture/CompilerException ...

for API purposes to not match on string prefixes

Add environment variables to BuildSettings (#2121)

Add lowmem for settings

Remove unused imports.

Remove unused selective imports. These are private imports of symbols that do not occur elsewhere in the file, so they are safe to be removed.

Extend 'linker dflags' detection for DMD ...

-betterC, -L… and -Xcc=… influence linking.

Improve 'linker-D-flag' detection for ldmd2 ...

ldmd2 supports all ldc2 ones.

Make {DMD,LDC}Compiler.isLinkerDFlag() public ...

E.g., this is useful for Reggae too.

Replace occurences of 'in ref' with 'const scope ref' ...

In support for dlang/dmd#11000

Add architecture x86_omf for windows-dmd

Add support for iOS/tvOS/watchOS

[dip1000] Fix compilation and test it on Travis CI

Fix linking shared libs with ldmd2 and gdmd

Improve cross-compilation support (replace `version` checks by BuildPlatform runtime checks) ...

Also fixes #1249. For LDC as implicit cross compiler, the file
extensions for libraries and object files etc. don't depend on the
compiler, but solely on the target. Targets selected with `--arch` are
correctly probed by dub, so that the parsed `BuildPlatform` represents
the target platform.