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rust/mk/cfg/x86_64-pc-windows-msvc.mk

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Very hacky MSVC hacks. Conflicts: mk/platform.mk src/librustc/session/config.rs src/librustc_back/target/aarch64_apple_ios.rs src/librustc_back/target/aarch64_linux_android.rs src/librustc_back/target/arm_linux_androideabi.rs src/librustc_back/target/arm_unknown_linux_gnueabi.rs src/librustc_back/target/arm_unknown_linux_gnueabihf.rs src/librustc_back/target/armv7_apple_ios.rs src/librustc_back/target/armv7s_apple_ios.rs src/librustc_back/target/i386_apple_ios.rs src/librustc_back/target/i686_apple_darwin.rs src/librustc_back/target/i686_pc_windows_gnu.rs src/librustc_back/target/i686_unknown_dragonfly.rs src/librustc_back/target/i686_unknown_linux_gnu.rs src/librustc_back/target/mips_unknown_linux_gnu.rs src/librustc_back/target/mipsel_unknown_linux_gnu.rs src/librustc_back/target/mod.rs src/librustc_back/target/powerpc_unknown_linux_gnu.rs src/librustc_back/target/x86_64_apple_darwin.rs src/librustc_back/target/x86_64_apple_ios.rs src/librustc_back/target/x86_64_pc_windows_gnu.rs src/librustc_back/target/x86_64_unknown_dragonfly.rs src/librustc_back/target/x86_64_unknown_freebsd.rs src/librustc_back/target/x86_64_unknown_linux_gnu.rs src/librustc_back/target/x86_64_unknown_openbsd.rs src/librustc_llvm/lib.rs src/librustc_trans/back/link.rs src/librustc_trans/trans/base.rs src/libstd/os.rs src/rustllvm/RustWrapper.cpp
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# x86_64-pc-windows-msvc configuration
configure: Start adding MSVC support This commit starts to add MSVC support to the ./configure script to enable the build system to detect and build an MSVC target with the cl.exe compiler and toolchain. The primary change here is a large sanity check when an MSVC target is requested (and currently only `x86_64-pc-windows-msvc` is recognized). When building an MSVC target, the configure script either requires the `--msvc-root` argument or for `cl.exe` to be in `PATH`. It also requires that if in the path `cl.exe` is the 64-bit version of the compiler. Once detected the configure script will run the `vcvarsall.bat` script provided by Visual Studio to learn about the `INCLUDE` and `LIB` variables needed by the `cl.exe` compiler to run (the default include/lib paths for the compiler/linker). These variables are then reexported when running `make` to ensure that our own compiles are running the same toolchain. The purpose of this detection and environment variable scraping is to avoid requiring the build itself to be run inside of a `cmd.exe` shell but rather allow it to run in the currently expected MinGW/MSYS shell.
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CC_x86_64-pc-windows-msvc="$(CFG_MSVC_CL)" -nologo
LINK_x86_64-pc-windows-msvc="$(CFG_MSVC_LINK)" -nologo
CXX_x86_64-pc-windows-msvc="$(CFG_MSVC_CL)" -nologo
CPP_x86_64-pc-windows-msvc="$(CFG_MSVC_CL)" -nologo
AR_x86_64-pc-windows-msvc="$(CFG_MSVC_LIB)" -nologo
Very hacky MSVC hacks. Conflicts: mk/platform.mk src/librustc/session/config.rs src/librustc_back/target/aarch64_apple_ios.rs src/librustc_back/target/aarch64_linux_android.rs src/librustc_back/target/arm_linux_androideabi.rs src/librustc_back/target/arm_unknown_linux_gnueabi.rs src/librustc_back/target/arm_unknown_linux_gnueabihf.rs src/librustc_back/target/armv7_apple_ios.rs src/librustc_back/target/armv7s_apple_ios.rs src/librustc_back/target/i386_apple_ios.rs src/librustc_back/target/i686_apple_darwin.rs src/librustc_back/target/i686_pc_windows_gnu.rs src/librustc_back/target/i686_unknown_dragonfly.rs src/librustc_back/target/i686_unknown_linux_gnu.rs src/librustc_back/target/mips_unknown_linux_gnu.rs src/librustc_back/target/mipsel_unknown_linux_gnu.rs src/librustc_back/target/mod.rs src/librustc_back/target/powerpc_unknown_linux_gnu.rs src/librustc_back/target/x86_64_apple_darwin.rs src/librustc_back/target/x86_64_apple_ios.rs src/librustc_back/target/x86_64_pc_windows_gnu.rs src/librustc_back/target/x86_64_unknown_dragonfly.rs src/librustc_back/target/x86_64_unknown_freebsd.rs src/librustc_back/target/x86_64_unknown_linux_gnu.rs src/librustc_back/target/x86_64_unknown_openbsd.rs src/librustc_llvm/lib.rs src/librustc_trans/back/link.rs src/librustc_trans/trans/base.rs src/libstd/os.rs src/rustllvm/RustWrapper.cpp
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CFG_LIB_NAME_x86_64-pc-windows-msvc=$(1).dll
CFG_STATIC_LIB_NAME_x86_64-pc-windows-msvc=$(1).lib
CFG_LIB_GLOB_x86_64-pc-windows-msvc=$(1)-*.dll
CFG_LIB_DSYM_GLOB_x86_64-pc-windows-msvc=$(1)-*.dylib.dSYM
Scale back changes made
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CFG_JEMALLOC_CFLAGS_x86_64-pc-windows-msvc :=
CFG_GCCISH_CFLAGS_x86_64-pc-windows-msvc :=
CFG_GCCISH_CXXFLAGS_x86_64-pc-windows-msvc :=
CFG_GCCISH_LINK_FLAGS_x86_64-pc-windows-msvc :=
Very hacky MSVC hacks. Conflicts: mk/platform.mk src/librustc/session/config.rs src/librustc_back/target/aarch64_apple_ios.rs src/librustc_back/target/aarch64_linux_android.rs src/librustc_back/target/arm_linux_androideabi.rs src/librustc_back/target/arm_unknown_linux_gnueabi.rs src/librustc_back/target/arm_unknown_linux_gnueabihf.rs src/librustc_back/target/armv7_apple_ios.rs src/librustc_back/target/armv7s_apple_ios.rs src/librustc_back/target/i386_apple_ios.rs src/librustc_back/target/i686_apple_darwin.rs src/librustc_back/target/i686_pc_windows_gnu.rs src/librustc_back/target/i686_unknown_dragonfly.rs src/librustc_back/target/i686_unknown_linux_gnu.rs src/librustc_back/target/mips_unknown_linux_gnu.rs src/librustc_back/target/mipsel_unknown_linux_gnu.rs src/librustc_back/target/mod.rs src/librustc_back/target/powerpc_unknown_linux_gnu.rs src/librustc_back/target/x86_64_apple_darwin.rs src/librustc_back/target/x86_64_apple_ios.rs src/librustc_back/target/x86_64_pc_windows_gnu.rs src/librustc_back/target/x86_64_unknown_dragonfly.rs src/librustc_back/target/x86_64_unknown_freebsd.rs src/librustc_back/target/x86_64_unknown_linux_gnu.rs src/librustc_back/target/x86_64_unknown_openbsd.rs src/librustc_llvm/lib.rs src/librustc_trans/back/link.rs src/librustc_trans/trans/base.rs src/libstd/os.rs src/rustllvm/RustWrapper.cpp
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CFG_GCCISH_DEF_FLAG_x86_64-pc-windows-msvc :=
CFG_LLC_FLAGS_x86_64-pc-windows-msvc :=
CFG_INSTALL_NAME_x86_64-pc-windows-msvc =
CFG_EXE_SUFFIX_x86_64-pc-windows-msvc := .exe
CFG_WINDOWSY_x86_64-pc-windows-msvc := 1
CFG_UNIXY_x86_64-pc-windows-msvc :=
CFG_LDPATH_x86_64-pc-windows-msvc :=
CFG_RUN_x86_64-pc-windows-msvc=$(2)
CFG_RUN_TARG_x86_64-pc-windows-msvc=$(call CFG_RUN_x86_64-pc-windows-msvc,,$(2))
configure: Start adding MSVC support This commit starts to add MSVC support to the ./configure script to enable the build system to detect and build an MSVC target with the cl.exe compiler and toolchain. The primary change here is a large sanity check when an MSVC target is requested (and currently only `x86_64-pc-windows-msvc` is recognized). When building an MSVC target, the configure script either requires the `--msvc-root` argument or for `cl.exe` to be in `PATH`. It also requires that if in the path `cl.exe` is the 64-bit version of the compiler. Once detected the configure script will run the `vcvarsall.bat` script provided by Visual Studio to learn about the `INCLUDE` and `LIB` variables needed by the `cl.exe` compiler to run (the default include/lib paths for the compiler/linker). These variables are then reexported when running `make` to ensure that our own compiles are running the same toolchain. The purpose of this detection and environment variable scraping is to avoid requiring the build itself to be run inside of a `cmd.exe` shell but rather allow it to run in the currently expected MinGW/MSYS shell.
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CFG_GNU_TRIPLE_x86_64-pc-windows-msvc := x86_64-pc-win32
# These two environment variables are scraped by the `./configure` script and
# are necessary for `cl.exe` to find standard headers (the INCLUDE variable) and
# for `link.exe` to find standard libraries (the LIB variable).
ifdef CFG_MSVC_INCLUDE_PATH
export INCLUDE := $(CFG_MSVC_INCLUDE_PATH)
endif
ifdef CFG_MSVC_LIB_PATH
export LIB := $(CFG_MSVC_LIB_PATH)
endif
# Unfortunately `link.exe` is also a program in `/usr/bin` on MinGW installs,
# but it's not the one that we want. As a result we make sure that our detected
# `link.exe` shows up in PATH first.
ifdef CFG_MSVC_LINK
export PATH := $(CFG_MSVC_ROOT)/VC/bin/amd64:$(PATH)
endif
mk: Add the ability to depend on native LLVM tools The compiler will require that `llvm-ar.exe` be available for MSVC-targeting builds (more comments on this soon), so this commit adds support for targets to depend on LLVM tools. The `core` library for MSVC depends on `llvm-ar.exe` which will be copied into place for the target before the compiler starts to run. Note that these targets all depend on `llvm-config.exe` to ensure that they're built before they're attempted to be copied.
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# There are more comments about this available in the target specification for
# Windows MSVC in the compiler, but the gist of it is that we use `llvm-ar.exe`
# instead of `lib.exe` for assembling archives, so we need to inject this custom
# dependency here.
NATIVE_TOOL_DEPS_core_T_x86_64-pc-windows-msvc += llvm-ar.exe
mk: Generate a .def file for rustc_llvm on MSVC Windows needs explicit exports of functions from DLLs but LLVM does not mention any of its symbols as being export-able from a DLL. The compiler, however, relies on being able to use LLVM symbols across DLL boundaries so we need to force many of LLVM's symbols to be exported from `rustc_llvm.dll`. This commit adds support for generation of a `rustc_llvm.def` file which is passed along to the linker when generating `rustc_llvm.dll` which should keep all these symbols exportable and usable.
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# When working with MSVC on windows, each DLL needs to explicitly declare its
# interface to the outside world through some means. The options for doing so
# include:
#
# 1. A custom attribute on each function itself
# 2. A linker argument saying what to export
# 3. A file which lists all symbols that need to be exported
#
# The Rust compiler takes care (1) for us for all Rust code by annotating all
# public-facing functions with dllexport, but we have a few native dependencies
# which need to cross the DLL boundary. The most important of these dependencies
# is LLVM which is linked into `rustc_llvm.dll` but primarily used from
# `rustc_trans.dll`. This means that many of LLVM's C API functions need to be
# exposed from `rustc_llvm.dll` to be forwarded over the boundary.
#
# Unfortunately, at this time, LLVM does not handle this sort of exportation on
# Windows for us, so we're forced to do it ourselves if we want it (which seems
# like the path of least resistance right now). To do this we generate a `.DEF`
# file [1] which we then custom-pass to the linker when building the rustc_llvm
# crate. This DEF file list all symbols that are exported from
# `src/librustc_llvm/lib.rs` and is generated by a small python script.
#
# Fun times!
#
# [1]: https://msdn.microsoft.com/en-us/library/28d6s79h.aspx
RUSTFLAGS_rustc_llvm_T_x86_64-pc-windows-msvc += \
-C link-args="-DEF:x86_64-pc-windows-msvc/rt/rustc_llvm.def"
CUSTOM_DEPS_rustc_llvm_T_x86_64-pc-windows-msvc += \
x86_64-pc-windows-msvc/rt/rustc_llvm.def
x86_64-pc-windows-msvc/rt/rustc_llvm.def: $(S)src/etc/mklldef.py \
$(S)src/librustc_llvm/lib.rs
$(CFG_PYTHON) $^ $@ rustc_llvm-$(CFG_FILENAME_EXTRA)
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