On Tue, Aug 01, 2023 at 09:19:25PM +0900, Masahiro Yamada wrote: > Debian Policy "4.9. Main building script: debian/rules" requires > "debian/rules must start with the line #!/usr/bin/make -f". [1] > > Currently, Kbuild does not follow this policy. > > When Kbuild generates debian/rules, "#!$(command -v $MAKE) -f" is > expanded by shell. The resuling string may not be "#!/usr/bin/make -f". > > There was a reason to opt out the Debian policy. > > If you run '/path/to/my/custom/make deb-pkg', debian/rules must also be > invoked by the same Make program. If #!/usr/bin/make were hard-coded in > debian/rules, the sub-make would be executed by a possibly different > Make version. > > This is problematic due to the MAKEFLAGS incompatibility, especially the > job server flag. Old Make versions used --jobserver-fds to propagate job > server file descriptors, but Make >= 4.2 uses --jobserver-auth. The flag > disagreement between the parent/child Makes would result in a process > fork explosion. > > However, having a non-standard path in the shebang causes another issue; > the generated source package is not portable as such a path does not > exist in other build environments. > > This commit solves those conflicting demands. > > Hard-code '#!/usr/bin/make -f' in debian/rules to create a portable and > Debian-compliant source package. > > Pass '--rules-file=$(MAKE) -f debian/rules' when dpkg-buildpackage is > invoked from Makefile so that debian/rules is executed by the same Make > program as used to start Kbuild. > > [1] https://www.debian.org/doc/debian-policy/ch-source.html#main-building-script-debian-rules > > Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx> Tested-by: Nathan Chancellor <nathan@xxxxxxxxxx> > --- > > (no changes since v1) > > scripts/Makefile.package | 2 +- > scripts/package/mkdebian | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/scripts/Makefile.package b/scripts/Makefile.package > index 85beab0363d7..f8a948ec2c6b 100644 > --- a/scripts/Makefile.package > +++ b/scripts/Makefile.package > @@ -148,7 +148,7 @@ deb-pkg srcdeb-pkg bindeb-pkg: > $(if $(findstring source, $(build-type)), \ > --unsigned-source --compression=$(KDEB_SOURCE_COMPRESS)) \ > $(if $(findstring binary, $(build-type)), \ > - -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch), \ > + --rules-file='$(MAKE) -f debian/rules' -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch), \ > --no-check-builddeps) \ > $(DPKG_FLAGS)) > > diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian > index 9105abab9728..2829f5b8aea6 100755 > --- a/scripts/package/mkdebian > +++ b/scripts/package/mkdebian > @@ -264,7 +264,7 @@ EOF > fi > > cat <<EOF > debian/rules > -#!$(command -v $MAKE) -f > +#!/usr/bin/make -f > > srctree ?= . > KERNELRELEASE = ${KERNELRELEASE} > -- > 2.39.2 >
