commit: d29682528a767c6fb033f121730b9b4bb946cba0
Author: Sam James <sam <AT> gentoo <DOT> org>
AuthorDate: Sat Mar 7 05:40:17 2026 +0000
Commit: Sam James <sam <AT> gentoo <DOT> org>
CommitDate: Sun Mar 15 22:21:10 2026 +0000
URL: https://gitweb.gentoo.org/proj/crossdev.git/commit/?id=d2968252
crossdev: initial GNU Hurd support
Introduce GNU Hurd support which needs the following new packages:
* dev-util/mig
* sys-kernel/hurd
* sys-kernel/gnumach
We have to build a few packages twice because of dependencies between
headers:
1) sys-kernel/gnumach[headers-only]
2) dev-util/mig
3) sys-kernel/gnumach[-headers-only] (which uses GNU MIG)
4) sys-kernel/hurd[headers-only]
5) sys-libs/glibc
These are handled as K{2,3}PKG with some hacks. I'm not completely happy
with this but I don't see a better way of doing it.
As a TODO, there's still an issue I think with the final headers-only
state in package.use but need to poke at that.
Also had to fix a few minor *-gnu => Linux assumptions (now match *-linux-gnu*
first).
`crossdev i686-gnu` gets me a working toolchain now on x86_64-pc-linux-gnu:
```
$ file /tmp/a
/tmp/a: ELF 32-bit LSB pie executable, Intel i386, version 1 (SYSV),
dynamically linked, interpreter /lib/ld.so, for GNU/Hurd 0.0.0, not stripped
```
More to do surely, but a start. I've also built bash with
`i686-gnu-emerge app-shells/bash`.
Some honourable mentions to prior art from Sergei Trofimovich <slyich <AT>
gmail.com>
at https://trofi.github.io/posts/208-crossdev-and-gnu-hurd.html and
Matija Skala <mskala <AT> gmx.com> at https://github.com/matijaskala/hurd.
Alexey Shvetsov <alexxy <AT> gentoo.org> also shared with me his past work
on it at https://github.com/alexxy/gentoo-hurd. In the end, I've gone for
a different approach than those.
Signed-off-by: Sam James <sam <AT> gentoo.org>
crossdev | 52 ++++++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 48 insertions(+), 4 deletions(-)
diff --git a/crossdev b/crossdev
index 3c4666d..07e3f5e 100755
--- a/crossdev
+++ b/crossdev
@@ -419,7 +419,8 @@ parse_target() {
LPKG="dietlibc"
LCAT="dev-libs"
;;
- *-gnu*)
+
+ *-linux*gnu*)
LPKG="glibc"
# gcc would not find -lpthread without static libraries
while building
# its copy of libgomp.
@@ -461,6 +462,24 @@ parse_target() {
WITH_DEF_HEADERS="no"
;;
+ # GNU Hurd
+ *-gnu)
+ LPKG="glibc"
+
+ # GNU Mach first has to be built w/ headers-only
+ KPKG="gnumach"
+ # GNU MIG needs those initial GNU Mach headers
+ K2CAT="dev-util"
+ K2PKG="mig"
+ # We need GNU Hurd headers for glibc too
+ K3CAT="sys-kernel"
+ K3PKG="hurd"
+
+ # gcc would not find -lpthread without static libraries
while building
+ # its copy of libgomp.
+ LUSE+=" static-libs"
+ ;;
+
# Now for the BSDs ...
*-freebsd*)
LCAT="sys-freebsd" LPKG="freebsd-lib"
@@ -1645,7 +1664,7 @@ for f in package.{accept_keywords,env,mask,use}
env/${CROSSDEV_OVERLAY_CATEGORY}
rm -f "${f}/${CROSSDEV_OVERLAY_CATEGORY}"
done
-pkglist=( K L )
+pkglist=( K K2 K3 L )
if [[ ${LLVM} == "yes" ]] ; then
pkglist+=( R C A P U )
else
@@ -1924,9 +1943,34 @@ if ! ex_fast ; then
if is_s2 ; then
set_eopts_on_pkg_status ${KPKG} crosscompile_opts_headers-only
headers-only
- USE="${KUSE} ${USE}" \
- CROSSCOMPILE_OPTS="" \
+ USE="${KUSE} ${USE} headers-only" \
+ CROSSCOMPILE_OPTS="headers-only" \
doemerge ${KPKG}
+
+ if [[ -n ${K2PKG} ]] ; then
+ # KPKG may need K2PKG to install everything, so
+ # build it as a dependency first.
+ set_eopts_on_pkg_status ${K2PKG} crosscompile_opts
+
+ USE="${KUSE} ${USE} headers-only" \
+ CROSSCOMPILE_OPTS="headers-only" \
+ doemerge ${K2PKG}
+
+ # Go again now we have it.
+ USE="${KUSE} ${USE}" \
+ CROSSCOMPILE_OPTS="" \
+ doemerge ${KPKG}
+ fi
+
+ if [[ -n ${K3PKG} ]] ; then
+ # LPKG may need K3PKG to install everything, so
+ # build it as a dependency first.
+ set_eopts_on_pkg_status ${K3PKG}
crosscompile_opts_headers-only headers-only
+
+ USE="${KUSE} ${USE} headers-only" \
+ CROSSCOMPILE_OPTS="headers-only" \
+ doemerge ${K3PKG}
+ fi
fi
# stage3: full C library (headers/libs/etc...)
