We pass -MD -MF args to clang when doing `@cImport`, which
gives us a complete list of files that the C code read from.
Then we add these to the cache. So even when using `@cImport`
Zig's caching system remains perfect. This is a proof of concept
for the mechanism that the self-hosted compiler will use to
watch and rebuild files.
* better libc detection
This introduces a new command `zig libc` which prints
the various paths of libc files. It outputs them to stdout
in a simple text file format that it is capable of parsing.
You can use `zig libc libc.txt` to validate a file.
These arguments are gone:
--libc-lib-dir [path] directory where libc crt1.o resides
--libc-static-lib-dir [path] directory where libc crtbegin.o resides
--msvc-lib-dir [path] (windows) directory where vcruntime.lib resides
--kernel32-lib-dir [path] (windows) directory where kernel32.lib resides
Instead we have this argument:
--libc [file] Provide a file which specifies libc paths
This is used to pass a libc text file (which can be generated with
`zig libc`). So it is easier to manage multiple cross compilation
environments.
`--cache on` now works when linking against libc.
`ZigTarget` now has a bool field `is_native`
Better error messaging when you try to link against libc or use
`@cImport` but the various paths cannot be found. It should also be
faster.
* save native_libc.txt in zig-cache
This avoids having to detect libc at runtime on every invocation.
On Arch Linux the current default compiler is gcc 8.2.1 and this change
is needed to ignore the following errors:
In file included from /home/wink/local/include/llvm/ADT/STLExtras.h:21,
from /home/wink/local/include/llvm/ADT/StringRef.h:13,
from /home/wink/local/include/llvm/ADT/StringMap.h:17,
from /home/wink/local/include/llvm/Support/Host.h:17,
from /home/wink/local/include/llvm/ADT/Hashing.h:49,
from /home/wink/local/include/llvm/ADT/ArrayRef.h:13,
from /home/wink/local/include/llvm/ADT/APFloat.h:21,
from /home/wink/local/include/clang/AST/APValue.h:18,
from /home/wink/local/include/clang/AST/Decl.h:17,
from /home/wink/local/include/clang/AST/ASTTypeTraits.h:20,
from /home/wink/local/include/clang/AST/ASTContext.h:18,
from /home/wink/local/include/clang/Frontend/ASTUnit.h:18,
from /home/wink/prgs/ziglang/zig/src/translate_c.cpp:18:
/home/wink/local/include/llvm/ADT/SmallVector.h: In instantiation of ‘void llvm::SmallVectorTemplateBase<T, true>::push_back(const T&) [with T = std::pair<void*, long unsigned int>]’:
/home/wink/local/include/llvm/Support/Allocator.h:249:33: required from ‘void* llvm::BumpPtrAllocatorImpl<AllocatorT, SlabSize, SizeThreshold>::Allocate(size_t, size_t) [with AllocatorT = llvm::MallocAllocator; long unsigned int SlabSize = 4096; long unsigned int SizeThreshold = 4096; size_t = long unsigned int]’
/home/wink/local/include/clang/AST/ASTContext.h:659:42: required from here
/home/wink/local/include/llvm/ADT/SmallVector.h:313:11: error: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘struct std::pair<void*, long unsigned int>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Werror=class-memaccess]
memcpy(this->end(), &Elt, sizeof(T));
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/8.2.1/utility:70,
from /home/wink/local/include/llvm/Support/type_traits.h:19,
from /home/wink/local/include/llvm/Support/Casting.h:19,
from /home/wink/local/include/clang/Basic/LLVM.h:22,
from /home/wink/local/include/clang/AST/APValue.h:17,
from /home/wink/local/include/clang/AST/Decl.h:17,
from /home/wink/local/include/clang/AST/ASTTypeTraits.h:20,
from /home/wink/local/include/clang/AST/ASTContext.h:18,
from /home/wink/local/include/clang/Frontend/ASTUnit.h:18,
from /home/wink/prgs/ziglang/zig/src/translate_c.cpp:18:
/usr/include/c++/8.2.1/bits/stl_pair.h:198:12: note: ‘struct std::pair<void*, long unsigned int>’ declared here
struct pair
^~~~
This reverts commit 937b822fa90181bf59f1c2ac45faab09342a183f, reversing
changes made to dd4b13ac0326aeb6c2c197bfac49f9e931ccee37.
Tests failing on Windows.
Re-opens #1360
ACHTUNG: llvm::APSInt stores an int's sign inside of its getRawData; Internally to Zig we store an integer's sign outside of getRawData! (~aps_int) calls .flip() internally on the raw data to match Zig.
test/translate_c.zig: enum: add wider range of values (u64) to try;
This reverts commit b8ce8f219c48ae833199130ce575241f848d690b.
Squashing the commits from the pull request resulted in kristopher tate
from being omitted from the authors. A future commit will merge
the code correctly.
* translate-c: Correctly translate enum init values
* translate-c: Test enum initialization
* translate-c: Flip to positive using APSInt builtins
* src/translate_c.cpp: correctly bridge llvm::APSInt with Zig BigInt;
ACHTUNG: llvm::APSInt stores an int's sign inside of its getRawData; Internally to Zig we store an integer's sign outside of getRawData! (~aps_int) calls .flip() internally on the raw data to match Zig.
* test/translate_c.zig: enum: add wider range of values (u64) to try;
closes#1360
