Ricardo Wurmus <rek...@elephly.net> skribis:
> So, a problem with a linker script that cannot be found and a missing
> avr-objcopy. I found them in the binutils-cross-avr output in the
> store, but since there’s no separate package for this I installed it
> like this:
>
> guix package -i
> /gnu/store/5f7pp8r9wpwzsf61cf406xb1hkad2cdi-binutils-cross-avr-2.25.1
If needed, you could add one such package to ‘cross-base.scm’.
Currently there are only full-blown cross-GCCs there, but if adding a
cross-binutils is useful, go for it.
> Microscheme 0.9.2, (C) Ryan Suchocki
>>> Treeshaker: After 4 rounds: 87 globals purged! 22 bytes will be reserved.
>>> 18 lines compiled OK
>>> Assembling...
> avr-ld: cannot find crtm328p.o: No such file or directory
> avr-ld: cannot find -lm
> avr-ld: cannot find -lc
In GCC we modify the spec file so that the right -L/libc/dir/name is
passed to ld; see (gnu packages gcc), ‘GNU_USER_TARGET_LIB_SPEC’.
However, ‘gcc-cross-sans-libc-avr’ is a bare-bones compiler, so it
doesn’t get the -L flag in question since there’s no libc to link to.
To get a full-blow compiler that uses avr-libc, you could start from
this:
diff --git a/gnu/packages/avr.scm b/gnu/packages/avr.scm
index d59816b..8e9f172 100644
--- a/gnu/packages/avr.scm
+++ b/gnu/packages/avr.scm
@@ -53,6 +53,13 @@
for use with GCC on Atmel AVR microcontrollers.")
(license (license:non-copyleft "http://www.nongnu.org/avr-libc/LICENSE.txt";))))
+(define-public xgcc-avr-avrlibc
+ ;; AVR cross-compiler, used to build AVR-Libc.
+ (let ((triplet "avr-linux-avrlibc"))
+ (cross-gcc triplet
+ (cross-binutils triplet)
+ avr-libc)))
+
(define-public microscheme
(package
(name "microscheme")
… and then address any glibc assumptions you encounter.
> There are multiple copies of “libm.a” and “libc.a” and there’s a
> “crtm328p.o” as well somewhere below the “avr/lib/” directory in the
> output of the avr-libc package. Even after adding these paths to
> LIBRARY_PATH, however, I cannot seem to fix the linker errors above.
> Then I realised that LIBRARY_PATH only works for native compilers, and
> that I would need to pass flags to the compiler (“-L”, maybe?).
Maybe microsheme should have avr-gcc and avr-libc as propagated inputs
or something like that?
HTH,
Ludo’.
