Since commit f1d87664b82a ("kbuild: cross-compile linux-headers package
when possible"), 'make binrpm-pkg' may attempt to cross-compile the
kernel-devel package, but it fails under certain circumstances.
For example, when CONFIG_MODULE_SIG_FORMAT is enabled on openSUSE
Tumbleweed, the following command fails:
$ make ARCH=arm64 CROSS_COMPILE=aarch64-suse-linux- binrpm-pkg
[ snip ]
Rebuilding host programs with aarch64-suse-linux-gcc...
HOSTCC /home/masahiro/ref/linux/rpmbuild/BUILDROOT/kernel-6.12.0_rc4-1.aarch64/usr/src/kernels/6.12.0-rc4/scripts/kallsyms
HOSTCC /home/masahiro/ref/linux/rpmbuild/BUILDROOT/kernel-6.12.0_rc4-1.aarch64/usr/src/kernels/6.12.0-rc4/scripts/sorttable
HOSTCC /home/masahiro/ref/linux/rpmbuild/BUILDROOT/kernel-6.12.0_rc4-1.aarch64/usr/src/kernels/6.12.0-rc4/scripts/asn1_compiler
HOSTCC /home/masahiro/ref/linux/rpmbuild/BUILDROOT/kernel-6.12.0_rc4-1.aarch64/usr/src/kernels/6.12.0-rc4/scripts/sign-file
/home/masahiro/ref/linux/rpmbuild/BUILDROOT/kernel-6.12.0_rc4-1.aarch64/usr/src/kernels/6.12.0-rc4/scripts/sign-file.c:25:10: fatal error: openssl/opensslv.h: No such file or directory
25 | #include <openssl/opensslv.h>
| ^~~~~~~~~~~~~~~~~~~~
compilation terminated.
I believe this issue is less common on Fedora because cross-compiling
user-space programs is not possible, even if the gcc-aarch64-linux-gnu
package is installed. In other words, CONFIG_CC_CAN_LINK is unset.
On Fedora 40, the package information explains this limitation clearly:
$ dnf info gcc-aarch64-linux-gnu
[ snip ]
Description : Cross-build GNU C compiler.
:
: Only building kernels is currently supported. Support for cross-building
: user space programs is not currently provided as that would massively multiply
: the number of packages.
This commit disables the kernel-devel package when cross-compiling
because cross-compiling RPM packages is somewhat challenging, and I
did not come up with a better solution.
Fixes: f1d87664b82a ("kbuild: cross-compile linux-headers package when possible")
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/Makefile.package | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/scripts/Makefile.package b/scripts/Makefile.package
index 11d53f240a2b..b9a4b0c8b8a0 100644
--- a/scripts/Makefile.package
+++ b/scripts/Makefile.package
@@ -72,7 +72,8 @@ rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec
--define='_topdir $(abspath rpmbuild)' \
$(if $(filter a b, $(build-type)), \
--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \
- $$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps)) \
+ $$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps) \
+ $(if $(cross_compiling), --without=devel)) \
$(RPMOPTS))
# deb-pkg srcdeb-pkg bindeb-pkg
--
2.43.0
