Also adds the CMake infrastructure to compile and link the D source files.
The build is partially broken:
- A few files in Phobos and druntime do not build
- MSVC build is broken because of unresolved symbols involving reals
LLVM assumes UTF-8 input, but our args mainly come from the LDC command
line (+ some from the config file and some implicit ASCII ones).
LDC doesn't use UTF-16 on Windows, so afaik, the command-line args are
encoded in the current codepage and so should just be written untouched
into the response file.
writeFileWithEncoding()'s default encoding is UTF-8, meaning no
conversion.
Also check for errors when trying to create and write the response file,
and refactor the executeAndWait() part.
This command line sent to CreateProcess():
"C:\LDC\bin\amd64.bat" 1 2 "3" 4
is internally transformed to:
C:\Windows\system32\cmd.exe /c "C:\LDC\bin\amd64.bat" 1 2 "3" 4
Now guess what - cmd.exe treats the command string after /c or /k in a
very special way if it begins with double quotes and is followed by other
quoted args. In this example, it tries to invoke:
C:\LDC\bin\amd64.bat" 1 2 "3
Another example:
C:\Windows\system32\cmd.exe /c "C:\L D C\bin\amd64.bat" 1 2 "3" 4
=> C:\L
The fix seems to be enclosing the whole command with additional double
quotes (but no additional escaping of the command!) and using /s for
cmd.exe:
C:\Windows\system32\cmd.exe /s /c ""C:\L D C\bin\amd64.bat" 1 2 "3" 4"
So the command is quoted, but not escaped, i.e., no regular argument to
cmd.exe, so we can't use LLVM's executeAndWait() to launch the cmd.exe
process. :/
Additionally, LLVM's arg-quoting code is not public, so we can't use it
to quote & escape the regular args inside the command.
I therefore implemented a simple quoteArgs() variant which should
suffice for our use cases.
If a static library is created then the driver now prepends the
path from -od option to the library name if that name is not
absolute. In case of Linux/Unix, automatic prepending of 'lib'
to the library name is removed.
This fixes failure of runnable/test13774.sh.
Adds a new command line option -mabi= and uses the value to compute
the ABI to use. Adds the ABI to linker and assembler invocation, too.
Allows consistent invocation of the whole tool chain.
