[R-pkg-devel] Win-builder not finding binaries provided by LinkingTo: cargo?

[Kevin Ushey]

I think this is the pertinent error:

> make: cargo: Command not found

That is, make is assuming that the cargo utility is installed and
available on the PATH, but that doesn't appear to be true on the CRAN
winbuilder machine.

The salso package (https://cran.r-project.org/package=salso)
explicitly requires cargo to be already available, per
SystemRequirements:

SystemRequirements: Cargo (>= 1.42.0) for installation from sources:
see file INSTALL

so you probably need to do something similar. I'd also recommend
downloading the 'salso' package to see how they resolve this, or
contacting the 'salso' maintainer to see what steps they took to
ensure their package could build on CRAN.

Best,
Kevin

On Tue, Apr 6, 2021 at 12:10 PM David Norris
<david using precisionmethods.guru> wrote:
>
> For version 0.2-2 of my ‘precautionary’ package, I have added fast numerical routines implemented in Rust.
> In my DESCRIPTION file, I am “LinkingTo: cargo (>= 0.1.28)”, but fail incoming check on Win-builder as follows:
> https://win-builder.r-project.org/incoming_pretest/precautionary_0.2-2_20210406_142130/Windows/00install.out
>
> * installing *source* package 'precautionary' ...
> ** using staged installation
> ** libs
>
> *** arch - i386
> rm -Rf precautionary.dll ./rust/target/i686-pc-windows-gnu/release/libprecautionary.a entrypoint.o
> d:/Compiler/rtools40/mingw32/bin/gcc  -I"D:/RCompile/recent/R/include" -DNDEBUG  -I'd:/RCompile/CRANpkg/lib/4.1/cargo/include'   -I"d:/Compiler/gcc-4.9.3/local330/include"     -pedantic -O2 -Wall  -std=gnu99 -mfpmath=sse -msse2 -mstackrealign  -c entrypoint.c -o entrypoint.o
> cargo build --target=i686-pc-windows-gnu --lib --release --manifest-path=./rust/Cargo.toml
> make: cargo: Command not found
> make: *** [Makevars.win:11: rust/target/-pc-windows-gnu/release/libprecautionary.a] Error 127
> ERROR: compilation failed for package 'precautionary'
> * removing 'd:/RCompile/CRANincoming/R-devel/lib/precautionary'
>
> As I understand the intention of package cargo https://CRAN.R-project.org/package=cargo, it aims to solve precisely this problem.
> Other platforms check my package just fine.
> Is the solution to be found in configuration of Win-builder, in my Makevars.win, or elsewhere?
> I have taken my Makevars.win straight from https://github.com/extendr/helloextendr/blob/main/src/Makevars.win as follows:
>
>
> TARGET = $(subst 64,x86_64,$(subst 32,i686,$(WIN)))-pc-windows-gnu
>
> LIBDIR = ./rust/target/$(TARGET)/release
>
> STATLIB = $(LIBDIR)/libprecautionary.a
>
> PKG_LIBS = -L$(LIBDIR) -lprecautionary -lws2_32 -ladvapi32 -luserenv
>
>
>
> all: C_clean
>
>
>
> $(SHLIB): $(STATLIB)
>
>
>
> $(STATLIB):
>
>         cargo build --target=$(TARGET) --lib --release --manifest-path=./rust/Cargo.toml
>
>
>
> C_clean:
>
>         rm -Rf $(SHLIB) $(STATLIB) $(OBJECTS)
>
>
>
> clean:
>
>         rm -Rf $(SHLIB) $(STATLIB) $(OBJECTS) rust/target
>
>
>         [[alternative HTML version deleted]]
>
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