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The compilers module is rather large and confusing, with spaghetti
dependencies going every which way. I'm planning to start breaking out
the internal representations into a mixins submodule, for things that
shouldn't be required outside of the compilers module itself.
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* correct handling of LDFLAGS in find_library and sanity_check on MSVC (fixes #3629)
The MSVC compiler requires all linker flags to be placed after the compiler flags, separated by a "/link" argument. This was already handled for regular linking commands, but not yet for the aforementioned special code paths.
* on MSVC, add /link separator between compiler and linker flags when it is missing
* avoid unnecessary /link argument
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Fix #5481
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There is an error when compiling with -Werror=return-type. Non void
functions must return valid values.
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Currently meson does not write the outcome of this test to the log
file which makes debugging wrong outcomes of this incredibly tedious.
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In most cases instead pass `for_machine`, the name of the relevant
machines (what compilers target, what targets run on, etc). This allows
us to use the cross code path in the native case, deduplicating the
code.
As one can see, environment got bigger as more information is kept
structured there, while ninjabackend got a smaller. Overall a few amount
of lines were added, but the hope is what's added is a lot simpler than
what's removed.
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This is a small example of the `is_cross` removal the that abstraction
enables.
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It was using ':' as a path separator while GCC uses ';' resulting in bogus
paths being returned. Instead assume that the compiler uses the platform native
separator.
The previous splitting code still worked sometimes because splitting
"C:/foo;C:/bar" resulted in the last part "/bar" being valid if "<DriveOfCWD>:/bar"
existed.
The fix also exposes a clang Windows bug where it uses the wrong separator:
https://reviews.llvm.org/D61121 . Use a regex to fix those first.
This resulted in linker errors when statically linking against a library which
had an external dependency linking against system libs.
Fixes #5386
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Becuase treating args as either keyword or positional makes inheritance
really awful to work with.
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Currently C++ inherits C, which can lead to diamond problems. By pulling
the code out into a standalone mixin class that the C, C++, ObjC, and
Objc++ compilers can inherit and override as necessary we remove one
source of diamonding. I've chosen to split this out into it's own file
as the CLikeCompiler class is over 1000 lines by itself. This also
breaks the VisualStudio derived classes inheriting from each other, to
avoid the same C -> CPP inheritance problems. This is all one giant
patch because there just isn't a clean way to separate this.
I've done the same for Fortran since it effectively inherits the
CCompiler (I say effectively because was it actually did was gross
beyond explanation), it's probably not correct, but it seems to work for
now. There really is a lot of layering violation going on in the
Compilers, and a really good scrubbing would do this code a lot of good.
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