How to build on Windows? #1442

inxksp · 2024-03-29T06:56:24Z

How can I compile a riscv-tolchain on Windows for nuclei N300 (arch=rv32imafcp)?

kito-cheng · 2024-03-29T07:36:27Z

WSL and then use mingw cross compiler (by something like --with-host=x86_64-w64-mingw32)...that's the best way I know.

TommyMurphyTM1234 · 2024-03-29T14:55:22Z

For what it's worth, two other options that I have found useful for building RISC-V toolchains - particularly cross compiling the toolchain to run on Windows:

crosstool-NG: https://crosstool-ng.github.io/
@ilg-ul's xPack npm/xpm/Docker based build scripts: https://xpack.github.io/dev-tools/riscv-none-elf-gcc/#build-details

TommyMurphyTM1234 · 2024-03-30T12:43:19Z

How can I compile a riscv-tolchain on Windows for nuclei N300 (arch=rv32imafcp)?

Is that even possible at the moment?
As far as I can see the P extension (which presumably encompasses some or all of Zbpbo, Zpn, Zpsfoperand) is not yet ratified so I'm not sure if/where any toolchain support has been prototyped?

https://jira.riscv.org/browse/RVS-1135?src=confmacro

Presumably not in the upstream GCC and related projects where only support for ratified extensions is implemented?

Edit: oh - maybe this helps? (I'd completely forgotten about it!)...

How to build riscv-gnu-toolchain to compile P-ext instructions riscv/riscv-p-spec#150

TommyMurphyTM1234 · 2024-03-30T22:19:39Z

WSL and then use mingw cross compiler (by something like --with-host=x86_64-w64-mingw32)...that's the best way I know.

I tried a few different tacks to get this working but failed.
This was my last atttempt which got furthest but still failed:

sudo apt install gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64
git clone https://github.com/riscv-collab/riscv-gnu-toolchain issues-1442
cd issues-1442
git clone https://github.com/plctlab/riscv-gcc -b riscv-gcc-p-ext riscv-gcc-p-ext
git clone https://github.com/plctlab/riscv-binutils-gdb -b riscv-binutils-p-ext riscv-binutils-p-ext
cd riscv-gcc-p-ext
./contrib/download_prerequisites
cd ..
./configure  --prefix=`pwd`/installed-tools --with-arch=rv32imafcp --with-abi=ilp32f --with-gcc-src=`pwd`/riscv-gcc-p-ext --with-binutils-src=`pwd`/riscv-binutils-p-ext --disable-gdb --with-host=x86_64-w64-mingw32 --without-system-zlib
make 2>&1 | tee build.log
...
cc -Wl,--stack,12582912 -o xgcc.exe gcc.o gcc-main.o ggc-none.o \
  c/gccspec.o driver-mingw32.o  libcommon-target.a \
   libcommon.a ../libcpp/libcpp.a   ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
cp xgcc.exe gcc-cross.exe
x86_64-w64-mingw32-g++ -fno-PIE -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -I. -Ic-family -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/c-family -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/../include -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/../libcpp/include -I/home/user/Downloads/riscv-gnu-toolchain/build-gcc-newlib-stage1/./gmp -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gmp -I/home/user/Downloads/riscv-gnu-toolchain/build-gcc-newlib-stage1/./mpfr/src -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/mpfr/src -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/mpc/src  -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/../libdecnumber -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/../libdecnumber/dpd -I../libdecnumber -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/../libbacktrace -I/home/user/Downloads/riscv-gnu-toolchain/build-gcc-newlib-stage1/./isl/include -I/home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/isl/include  -o c-family/cppspec.o -MT c-family/cppspec.o -MMD -MP -MF c-family/.deps/cppspec.TPo /home/user/Downloads/riscv-gnu-toolchain/riscv-gcc-p-ext/gcc/c-family/cppspec.c
x86_64-w64-mingw32-g++ -no-pie   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE   -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -static-libstdc++ -static-libgcc -Wl,--stack,12582912 -o cpp.exe gcc.o gcc-main.o ggc-none.o \
  c-family/cppspec.o driver-mingw32.o  libcommon-target.a \
   libcommon.a ../libcpp/libcpp.a   ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a
riscv32-unknown-elf-gcc -dumpspecs > tmp-specs
/bin/bash: line 1: riscv32-unknown-elf-gcc: command not found
make[2]: *** [Makefile:2090: specs] Error 127
make[2]: Leaving directory '/home/user/Downloads/riscv-gnu-toolchain/build-gcc-newlib-stage1/gcc'
make[1]: *** [Makefile:4414: all-gcc] Error 2
make[1]: Leaving directory '/home/user/Downloads/riscv-gnu-toolchain/build-gcc-newlib-stage1'
make: *** [Makefile:627: stamps/build-gcc-newlib-stage1] Error 2

I gave up and had better success with crosstool-NG.

I followed the usual instructions for installing CT-NG:

https://crosstool-ng.github.io/docs/install/

cd ~/Downloads
git clone https://github.com/crosstool-ng/crosstool-ng
cd crosstool-ng
./bootstrap
# Install any prerequisites and repeat until bootstrap succeeds
./configure --enable-local
# Install any prerequisites and repeat until configure succeeds
make

As above I installed the Windows cross compilers and cloned the P extension sources:

sudo apt install gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64
cd ~/Downloads/crosstool-ng
git clone https://github.com/plctlab/riscv-gcc -b riscv-gcc-p-ext riscv-gcc-p-ext
git clone https://github.com/plctlab/riscv-binutils-gdb -b riscv-binutils-p-ext riscv-binutils-p-ext

I then ran ct-ng menuconfig to create this .config (renamed to allow uploading here) to build the Canadian Cross toolchain (build host = Linux, run host = Windows, target = RISC-V) using the P enabled GCC and Binutils sources and with a toolchain default arch/abi of rv32imafcp/ilp32f:

riscv-gcc-win.config.txt

I then ran ct-ng build and the toolchain built successfully.
I'm not sure about the non-fatal errors in this log which don't seem to impact the functionality of the final toolchain but I will check into them with the CT-NG community:

Non-fatal errors on static binutils & gdb for Linux->Windows->RISC-V Canadian Cross crosstool-ng/crosstool-ng#2140

Edit: see the link above for an explanation of these "errors". In summary they are false positives and can be ignored. They occur because CT-NG presents any output string containing "error" as an [ERROR].

./ct-ng build
[INFO ]  Performing some trivial sanity checks
[WARN ]  Number of open files 1024 may not be sufficient to build the toolchain; increasing to 2048
[INFO ]  Build started 20240331.103021
[INFO ]  Building environment variables
[EXTRA]  Preparing working directories
[EXTRA]  Installing user-supplied crosstool-NG configuration
[EXTRA]  =================================================================
[EXTRA]  Dumping internal crosstool-NG configuration
[EXTRA]    Building a toolchain for:
[EXTRA]      build  = x86_64-pc-linux-gnu
[EXTRA]      host   = x86_64-w64-mingw32
[EXTRA]      target = riscv32-unknown-elf
[EXTRA]  Dumping internal crosstool-NG configuration: done in 0.12s (at 00:33)
[INFO ]  =================================================================
[INFO ]  Retrieving needed toolchain components' tarballs
[INFO ]  Retrieving needed toolchain components' tarballs: done in 2.22s (at 00:36)
[INFO ]  =================================================================
[INFO ]  Extracting and patching toolchain components
[WARN ]    binutils: using custom location, no patches applied
[WARN ]    gcc: using custom location, no patches applied
[INFO ]  Extracting and patching toolchain components: done in 406.38s (at 07:22)
[INFO ]  =================================================================
[INFO ]  Installing zlib for build
[EXTRA]    Configuring zlib
[EXTRA]    Building zlib
[EXTRA]    Installing zlib
[INFO ]  Installing zlib for build: done in 3.61s (at 07:26)
[INFO ]  =================================================================
[INFO ]  Installing zstd for build
[EXTRA]    Building zstd
[EXTRA]    Installing zstd
[INFO ]  Installing zstd for build: done in 16.49s (at 07:42)
[INFO ]  =================================================================
[INFO ]  Installing GMP for build
[EXTRA]    Configuring GMP
[EXTRA]    Building GMP
[EXTRA]    Installing GMP
[INFO ]  Installing GMP for build: done in 92.36s (at 09:15)
[INFO ]  =================================================================
[INFO ]  Installing MPFR for build
[EXTRA]    Configuring MPFR
[EXTRA]    Building MPFR
[EXTRA]    Installing MPFR
[INFO ]  Installing MPFR for build: done in 54.08s (at 10:09)
[INFO ]  =================================================================
[INFO ]  Installing ISL for build
[EXTRA]    Configuring ISL
[EXTRA]    Building ISL
[EXTRA]    Installing ISL
[INFO ]  Installing ISL for build: done in 54.55s (at 11:04)
[INFO ]  =================================================================
[INFO ]  Installing MPC for build
[EXTRA]    Configuring MPC
[EXTRA]    Building MPC
[EXTRA]    Installing MPC
[INFO ]  Installing MPC for build: done in 21.40s (at 11:25)
[INFO ]  =================================================================
[INFO ]  Installing ncurses for build
[EXTRA]    Configuring ncurses
[EXTRA]    Building ncurses
[EXTRA]    Installing ncurses
[INFO ]  Installing ncurses for build: done in 46.89s (at 12:12)
[INFO ]  =================================================================
[INFO ]  Installing libiconv for build
[EXTRA]    Skipping (included in GNU C library)
[INFO ]  Installing libiconv for build: done in 0.05s (at 12:12)
[INFO ]  =================================================================
[INFO ]  Installing gettext for build
[EXTRA]    Skipping (included in GNU C library)
[INFO ]  Installing gettext for build: done in 0.04s (at 12:12)
[INFO ]  =================================================================
[INFO ]  Installing binutils for build
[EXTRA]    Configuring binutils
[EXTRA]    Building binutils
[EXTRA]    Installing binutils
[INFO ]  Installing binutils for build: done in 138.06s (at 14:30)
[INFO ]  =================================================================
[INFO ]  Installing zlib for host
[EXTRA]    Building zlib
[EXTRA]    Installing zlib
[INFO ]  Installing zlib for host: done in 2.34s (at 14:33)
[INFO ]  =================================================================
[INFO ]  Installing zstd for host
[EXTRA]    Building zstd
[EXTRA]    Installing zstd
[INFO ]  Installing zstd for host: done in 18.61s (at 14:51)
[INFO ]  =================================================================
[INFO ]  Installing GMP for host
[EXTRA]    Configuring GMP
[EXTRA]    Building GMP
[EXTRA]    Installing GMP
[INFO ]  Installing GMP for host: done in 92.62s (at 16:24)
[INFO ]  =================================================================
[INFO ]  Installing MPFR for host
[EXTRA]    Configuring MPFR
[EXTRA]    Building MPFR
[EXTRA]    Installing MPFR
[INFO ]  Installing MPFR for host: done in 51.87s (at 17:16)
[INFO ]  =================================================================
[INFO ]  Installing ISL for host
[EXTRA]    Configuring ISL
[EXTRA]    Building ISL
[EXTRA]    Installing ISL
[INFO ]  Installing ISL for host: done in 56.67s (at 18:13)
[INFO ]  =================================================================
[INFO ]  Installing MPC for host
[EXTRA]    Configuring MPC
[EXTRA]    Building MPC
[EXTRA]    Installing MPC
[INFO ]  Installing MPC for host: done in 21.52s (at 18:34)
[INFO ]  =================================================================
[INFO ]  Installing expat for host
[EXTRA]    Configuring expat
[EXTRA]    Building expat
[EXTRA]    Installing expat
[INFO ]  Installing expat for host: done in 23.48s (at 18:58)
[INFO ]  =================================================================
[INFO ]  Installing ncurses for host
[EXTRA]    Configuring ncurses
[EXTRA]    Building ncurses
[EXTRA]    Installing ncurses
[INFO ]  Installing ncurses for host: done in 69.42s (at 20:07)
[INFO ]  =================================================================
[INFO ]  Installing libiconv for host
[EXTRA]    Configuring libiconv
[EXTRA]    Building libiconv
[EXTRA]    Installing libiconv
[INFO ]  Installing libiconv for host: done in 34.59s (at 20:42)
[INFO ]  =================================================================
[INFO ]  Installing gettext for host
[EXTRA]    Configuring gettext
[EXTRA]    Building gettext
[EXTRA]    Installing gettext
[INFO ]  Installing gettext for host: done in 579.10s (at 30:21)
[INFO ]  =================================================================
[INFO ]  Installing binutils for host
[EXTRA]    Configuring binutils
[EXTRA]    Prepare binutils for static build
[ERROR]      449 |       _bfd_error_handler (_("%pB: error: attribute section '%pA' too big: %#llx"),
[ERROR]      449 |       _bfd_error_handler (_("%pB: error: attribute section '%pA' too big: %#llx"),
[ERROR]      490 |   (_("%pB: error: attribute section length too small: %" PRId64),
[ERROR]      490 |   (_("%pB: error: attribute section length too small: %" PRId64),
[ERROR]      599 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      599 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      599 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      599 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]     2036 |  (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"),
[ERROR]     2036 |  (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"),
[ERROR]     2077 |   (_("DWARF error: unknown format content type %" PRIu64),
[ERROR]     2077 |   (_("DWARF error: unknown format content type %" PRIu64),
[ERROR]     2150 |  (_("DWARF error: line info section is too small (%" PRId64 ")"),
[ERROR]     2150 |  (_("DWARF error: line info section is too small (%" PRId64 ")"),
[ERROR]     2180 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     2180 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     2180 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     3006 |      (_("DWARF error: unable to read alt ref %" PRIu64),
[ERROR]     3006 |      (_("DWARF error: unable to read alt ref %" PRIu64),
[ERROR]     3062 |   (_("DWARF error: unable to locate abstract instance DIE ref %"
[ERROR]     3062 |   (_("DWARF error: unable to locate abstract instance DIE ref %"
[EXTRA]    Building binutils
[EXTRA]    Installing binutils
[INFO ]  Installing binutils for host: done in 139.13s (at 32:40)
[INFO ]  =================================================================
[INFO ]  Installing C library headers
[INFO ]  Installing C library headers: done in 0.22s (at 32:40)
[INFO ]  =================================================================
[INFO ]  Installing core C gcc compiler
[EXTRA]    Configuring core C gcc compiler
[EXTRA]    Building gcc
[EXTRA]    Installing gcc
[EXTRA]    Housekeeping for core gcc compiler
[EXTRA]       '' --> lib (gcc)   lib (os)
[INFO ]  Installing core C gcc compiler: done in 496.34s (at 40:57)
[INFO ]  =================================================================
[INFO ]  Installing C library
[EXTRA]    Configuring C library
[EXTRA]    Building C library
[EXTRA]    Installing C library
[INFO ]  Installing C library: done in 61.56s (at 41:58)
[INFO ]  =================================================================
[INFO ]  Installing final gcc compiler for build
[EXTRA]    Configuring final gcc compiler
[EXTRA]    Building final gcc compiler
[EXTRA]    Installing final gcc compiler
[EXTRA]    Housekeeping for core gcc compiler
[EXTRA]       '' --> lib (gcc)   lib (os)
[INFO ]  Installing final gcc compiler for build: done in 583.29s (at 51:42)
[INFO ]  =================================================================
[INFO ]  Installing final gcc compiler
[EXTRA]    Configuring final gcc compiler
[EXTRA]    Building final gcc compiler
[EXTRA]    Installing final gcc compiler
[EXTRA]    Housekeeping for core gcc compiler
[EXTRA]    Canadian Cross/Cross-native unable to confirm multilibs configuration  directly; will use build-compiler for housekeeping.
[EXTRA]       '' --> lib (gcc)   lib (os)
[INFO ]  Installing final gcc compiler: done in 631.95s (at 62:14)
[INFO ]  =================================================================
[INFO ]  Installing cross-gdb
[EXTRA]    Configuring cross gdb
[EXTRA]    Prepare gdb for static build
[ERROR]    14251 |       (_("%pB(%pA): error: reloc table entry %zu is empty"),
[ERROR]    14251 |       (_("%pB(%pA): error: reloc table entry %zu is empty"),
[ERROR]    14276 |        (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]    14276 |        (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]    14294 |    (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]    14294 |    (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]    14308 |       (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]    14308 |       (_("%pB(%pA): error: secondary reloc %zu"
[ERROR]      503 |       _bfd_error_handler (_("%pB: error: attribute section '%pA' too big: %#llx"),
[ERROR]      503 |       _bfd_error_handler (_("%pB: error: attribute section '%pA' too big: %#llx"),
[ERROR]      757 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      757 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      757 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]      757 |       _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
[ERROR]     2595 |  (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"),
[ERROR]     2595 |  (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"),
[ERROR]     2634 |   (_("DWARF error: unknown format content type %" PRIu64),
[ERROR]     2634 |   (_("DWARF error: unknown format content type %" PRIu64),
[ERROR]     2707 |  (_("DWARF error: line info section is too small (%" PRId64 ")"),
[ERROR]     2707 |  (_("DWARF error: line info section is too small (%" PRId64 ")"),
[ERROR]     2734 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     2734 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     2734 |  (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
[ERROR]     3505 |      (_("DWARF error: unable to read alt ref %" PRIu64),
[ERROR]     3505 |      (_("DWARF error: unable to read alt ref %" PRIu64),
[ERROR]     3557 |   (_("DWARF error: unable to locate abstract instance DIE ref %"
[ERROR]     3557 |   (_("DWARF error: unable to locate abstract instance DIE ref %"
[EXTRA]    Building cross gdb
[EXTRA]    Installing cross gdb
[EXTRA]    Installing '.gdbinit' template
[INFO ]  Installing cross-gdb: done in 454.00s (at 69:48)
[INFO ]  =================================================================
[INFO ]  Finalizing the toolchain's directory
[INFO ]    Stripping all toolchain executables
[EXTRA]    Creating toolchain aliases
[EXTRA]    Removing installed documentation
[EXTRA]    Collect license information from: /home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/src
[EXTRA]    Put the license information to: /home/user/x-tools/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/share/licenses
[INFO ]  Finalizing the toolchain's directory: done in 23.08s (at 70:11)
[INFO ]  Build completed at 20240331.114025
[INFO ]  (elapsed: 70:04.38)
[INFO ]  Finishing installation (may take a few seconds)...

To avoid problems with symbolic links I did the following:

cd ~/x-tools/HOST-x86_64-w64-mingw32
tar --dereference -czvf riscv32-unknown-elf.tgz riscv32-unknown-elf
# I'm using a Linux guest VM on Windows host so copy the compressed toolchain to Windows
cp riscv32-unknown-elf.tgz /media/sf_C_DRIVE/temp
# Extract the toolchain on Windows

In a Windows command shell:

c:
cd \temp\riscv32-unknown-elf\bin
riscv32-unknown-elf-gcc -v
Using built-in specs.
COLLECT_GCC=riscv32-unknown-elf-gcc
COLLECT_LTO_WRAPPER=c:/temp/riscv32-unknown-elf/bin/../libexec/gcc/riscv32-unknown-elf/10.2.0/lto-wrapper.exe
Target: riscv32-unknown-elf
Configured with: /home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/src/gcc/configure --build=x86_64-build_pc-linux-gnu --host=x86_64-host_w64-mingw32 --target=riscv32-unknown-elf --prefix=/home/user/x-tools/HOST-x86_64-w64-mingw32/riscv32-unknown-elf --exec_prefix=/home/user/x-tools/HOST-x86_64-w64-mingw32/riscv32-unknown-elf --with-local-prefix=/home/user/x-tools/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/riscv32-unknown-elf --with-headers=/home/user/x-tools/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/riscv32-unknown-elf/include --with-newlib --enable-threads=no --disable-shared --with-arch=rv32imafcp --with-abi=ilp32f --with-pkgversion='crosstool-NG 1.26.0.66_6ad7b96' --enable-__cxa_atexit --disable-libgomp --disable-libmudflap --disable-libmpx --disable-libssp --disable-libquadmath --disable-libquadmath-support --disable-libstdcxx-verbose --with-gmp=/home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/buildtools/complibs-host --with-mpfr=/home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/buildtools/complibs-host --with-mpc=/home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/buildtools/complibs-host --with-isl=/home/user/Downloads/crosstool-ng/.build/HOST-x86_64-w64-mingw32/riscv32-unknown-elf/buildtools/complibs-host --enable-lto --enable-target-optspace --disable-nls --disable-multilib --enable-languages=c,c++
Thread model: single
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.0 (crosstool-NG 1.26.0.66_6ad7b96)

QBos07 · 2024-03-31T14:33:43Z

Hello, ct-ng contributer here. I just wanted to say that MSYS2 is a great wsl alternative using native windows. ct-ng and gcc can but successfully compiled and used in this environment.
The toolchains don't have any dependency on the environment apart from a few DLLs wich you can just copy to the bin folder of the toolchain.

TommyMurphyTM1234 · 2024-03-31T14:59:43Z

Hello, ct-ng contributer here. I just wanted to say that MSYS2 is a great wsl alternative using native windows. ct-ng and gcc can but successfully compiled and used in this environment. The toolchains don't have any dependency on the environment apart from a few DLLs wich you can just copy to the bin folder of the toolchain.

Thanks @QBos07. Maybe things have changed in recent years but, in the past, I always found MSYS2 difficult to correctly configure and use in order to build a GCC toolchain or other stuff such as OpenOCD. I always found a CT-NG Canadian Cross compilation from Linux more effective. Or the old xPack Docker based approach. I'm only trying the latest xPack approach now to see if/how that can be used to build a custom toolchain such as the one mentioned here. Maybe I should give MSYS2 another go too? :-)

QBos07 · 2024-03-31T16:33:28Z

Definitely, I wouldn't say it works flawlessly 101% of the time but for that is autoconf. I can recommend it.

TommyMurphyTM1234 · 2024-04-01T11:15:54Z

Definitely, I wouldn't say it works flawlessly 101% of the time but for that is autoconf. I can recommend it.

~~Thanks @QBos07 - unfortunately I spent several hours yesterday trying to get things to build under MSYS2 but failed miserably.~~

Edit: ignore that - at least one fundamental mistake that I seem to have made was to use pacman -S gcc instead of pacman -S mingw-w64-ucrt-x86_64-gcc.

https://www.msys2.org/#:~:text=You%20will%20probably,ucrt%2Dx86_64%2Dgcc

I'll continue trying with the correct GCC installed and post back with updates when I have something useful.

TommyMurphyTM1234 · 2024-04-06T11:56:14Z

I was able to build a bare-metal toolchain (but not including GDB yet) using MSYS2 as follows:

Create an install directory for MSYS2 - e.g. C:\msys64.
Enable NTFS filesystem case sensitivity in order to avoid problems with files with the same name but different case (e.g. Linux headers): https://learn.microsoft.com/en-us/windows/wsl/case-sensitivity. In a PowerShell terminal with administrative privileges run this command: fsutil.exe file setCaseSensitiveInfo C:\msys64\ enable.
Download the MSYS2 installer from https://www.msys2.org/ run it and install into C:\msys64.
Uncomment MSYS=winsymlinks:nativestrict in C:\msys64\ucrt64.ini to avoid problems with ln -s symbolic links that the build process creates.
Run an MSYS2 UCRT64 terminal: Start Menu > MSYS2 > MSYS2 UCRT64.
Install these dependencies: ~~pacman -S mingw-w64-ucrt-x86_64-gcc autoconf automake autotools curl python3 python3-pip gawk bison flex texinfo gperf libtool patchutils bc libexpat expat ninja git cmake~~. Updated dependencies including the appropriate expat package for building GDB: pacman -S mingw-w64-ucrt-x86_64-gcc autoconf automake autotools curl python3 python3-pip gawk bison flex texinfo gperf libtool patchutils bc libexpat mingw-w64-ucrt-x86_64-expat ninja git cmake.
Run pwd to display the home directory - if it contains a space/spaces ("e.g. mine was /home/Tommy Murphy) then these will cause problems so create and use a directory without spaces - e.g. cd /home && mkdir riscv && cd riscv.
Do a build as normal ~~(disable GDB for now until I figure that out):~~ See point 6 above.

git clone https://github.com/riscv-collab/riscv-gnu-toolchain
cd riscv-gnu-toolchain
./configure --prefix=`pwd`/installed-tools
make 2>&1 | tee build.log

TODO:

~~Figure out how to build GDB - haven't been able to figure out what expat package meets its dependency requirements: https://packages.msys2.org/search?t=pkg&q=expat.~~ Done. See point 6 above.
~~Build Linux toolchain.~~ Done
Build other stuff - e.g. Spike/QEMU, LLVM etc.

Notes:

crosstool-NG seems much easier to configure/use and builds a toolchain much quicker.

TommyMurphyTM1234 · 2024-04-07T20:31:33Z

Figure out how to build GDB - haven't been able to figure out what expat package meets its dependency requirements: https://packages.msys2.org/search?t=pkg&q=expat

For some reason just installing the expat package (pacman -S expat) didn't help and the build failed looking for libexpat. I tried pacman -S mingw-w64-expat that failed:

pacman -S mingw-w64-expat
error: target not found: mingw-w64-expat

In the end I just downloaded the expat sources and built them myself and then the build worked:

cd /home/temp
# https://github.com/libexpat/libexpat/releases
wget https://github.com/libexpat/libexpat/releases/download/R_2_6_2/expat-2.6.2.tar.gz
tar xzvf expat-2.6.2.tar.gz
cd expat-2.6.2
./configure 
make install

cd /home/temp
git clone https://github.com/riscv-collab/riscv-gnu-toolchain
cd riscv-gnu-toolchain
./configure --prefix=`pwd`/installed-tools
make

ls installed-tools/bin/
riscv64-unknown-elf-addr2line.exe  riscv64-unknown-elf-cpp.exe         riscv64-unknown-elf-gcc-nm.exe      riscv64-unknown-elf-gcov.exe       riscv64-unknown-elf-ld.exe        riscv64-unknown-elf-ranlib.exe   riscv64-unknown-elf-strip.exe
riscv64-unknown-elf-ar.exe         riscv64-unknown-elf-elfedit.exe     riscv64-unknown-elf-gcc-ranlib.exe  riscv64-unknown-elf-gdb-add-index  riscv64-unknown-elf-lto-dump.exe  riscv64-unknown-elf-readelf.exe
riscv64-unknown-elf-as.exe         riscv64-unknown-elf-g++.exe         riscv64-unknown-elf-gcc.exe         riscv64-unknown-elf-gdb.exe        riscv64-unknown-elf-nm.exe        riscv64-unknown-elf-run.exe
riscv64-unknown-elf-c++.exe        riscv64-unknown-elf-gcc-13.2.0.exe  riscv64-unknown-elf-gcov-dump.exe   riscv64-unknown-elf-gprof.exe      riscv64-unknown-elf-objcopy.exe   riscv64-unknown-elf-size.exe
riscv64-unknown-elf-c++filt.exe    riscv64-unknown-elf-gcc-ar.exe      riscv64-unknown-elf-gcov-tool.exe   riscv64-unknown-elf-ld.bfd.exe     riscv64-unknown-elf-objdump.exe   riscv64-unknown-elf-strings.exe

I did also had to manually copy the following DLLs in order for GDB to launch correctly:

cp /ucrt64/bin/libgmp-10.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libmpfr-6.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libzstd.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libgcc_s_seh-1.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libiconv-2.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libwinpthread-1.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libstdc++-6.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin
cp /ucrt64/bin/libexpat-1.dll /home/temp/riscv-gnu-toolchain/installed-tools/bin

I haven't tried all of the toolchain executables so it's possible that there are other dependent DLLs but I think that the principle of compiling the Windows native bare-metal toolchain using MSYS2 has been illustrated adequately.

QBos07 · 2024-04-07T20:49:22Z

The binary version of expat is distrubuted as mingw-w64-ucrt-x86_64-expat for this platform.

TommyMurphyTM1234 · 2024-04-07T21:55:11Z

The binary version of expat is distrubuted as mingw-w64-ucrt-x86_64-expat for this platform.

Thanks @QBos07 - I didn't realise that I was searching only base packages and not all packages earlier!

https://packages.msys2.org/search?t=binpkg&q=expat

TommyMurphyTM1234 · 2024-04-08T21:25:24Z

I haven't tried all of the toolchain executables so it's possible that there are other dependent DLLs but I think that the principle of compiling the Windows native bare-metal toolchain using MSYS2 has been illustrated adequately.

I guess that these DLLs probably need to be copied to the toolchain bin directory...

 ldd installed-tools/bin/*.exe | grep ucrt64 | rev | cut -c17- | rev | sort | uniq
        libexpat-1.dll => /ucrt64/bin/libexpat-1.dll
        libgcc_s_seh-1.dll => /ucrt64/bin/libgcc_s_seh-1.dll
        libgmp-10.dll => /ucrt64/bin/libgmp-10.dll
        libiconv-2.dll => /ucrt64/bin/libiconv-2.dll
        libisl-23.dll => /ucrt64/bin/libisl-23.dll
        libmpc-3.dll => /ucrt64/bin/libmpc-3.dll
        libmpfr-6.dll => /ucrt64/bin/libmpfr-6.dll
        libstdc++-6.dll => /ucrt64/bin/libstdc++-6.dll
        libwinpthread-1.dll => /ucrt64/bin/libwinpthread-1.dll
        libzstd.dll => /ucrt64/bin/libzstd.dll
        zlib1.dll => /ucrt64/bin/zlib1.dll

QBos07 · 2024-04-09T15:06:07Z

If you don't want to copy the dlls. It's possible to just add C:\msys64\ucrt\bin to the PATH. This has the added benefit of convienently having many coreutils in your windows terminal.

TommyMurphyTM1234 · 2024-04-09T15:12:39Z

Yes, but I'm thinking of the situation where one builds a native Windows toolchain for use by somebody who doesn't have/want to install MSYS2.

ilg-ul · 2024-04-09T15:19:15Z

It's possible to just add C:\msys64\ucrt\bin to the PATH

Depending on the position in the PATH, this might break other programs using different versions of these libraries.

I'm no Windows specialist, so I might be wrong, but I think that the safest location is the same folder as the executable that uses the library.

TommyMurphyTM1234 · 2024-06-01T10:45:14Z

Two methods for building a Windows toolchain have been shown to work:

Canadian Cross toolchain buid using crosstool-NG on Linux to build a toolchain to run on Windows that generates code for RISC-V
Building natively on Windows using MSYS2

I haven't had time to pursue a third way:

xPack

I will try to look into that at some point but for now I will close this issue as the original question has been addressed.

TommyMurphyTM1234 closed this as completed Jun 1, 2024

TommyMurphyTM1234 mentioned this issue Jun 4, 2024

Support for new CH32V006 / CH32V005 boards? cnlohr/ch32fun#315

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