So, I’m trying to update the bind package to support building with gssapi as a variant instead of it being a compile-time option.
A first stab at this is here, with the most important part being the Makefile. To illustrate the problem I’m facing, consider the definition of bind-tools:
define Package/bind-tools
$(Package/bind/Default)
TITLE+= administration tools (all)
DEPENDS:= \
+bind-check \
+bind-delv \
+bind-dig \
+bind-nslookup \
+bind-dnssec \
+bind-host \
+bind-rndc \
+bind-ddns-confgen
endef
Now, each package (like bind-nslookup) comes in two flavours with my patches: bind-nslookup and bind-nslookup-gssapi. This is modelled after e.g. ethtool which has a Makefile like this:
define Package/ethtool
SECTION:=net
CATEGORY:=Network
TITLE:=Display or change ethernet card settings
URL:=http://www.kernel.org/pub/software/network/ethtool/
VARIANT:=tiny
CONFLICTS:=ethtool-full
endef
define Package/ethtool-full
$(Package/ethtool)
TITLE += (full)
VARIANT:=full
PROVIDES:=ethtool
DEPENDS:=+libmnl
CONFLICTS:=
endef
This allows packages to depend on ethtool and it’ll be satisfied by ethtool or ethtool-full
So, returning to e.g. bind-nslookup from my branch, the relevant part of the Makefile looks like this:
define Package/bind-nslookup
$(Package/bind/Default)
TITLE+= tools (nslookup)
ALTERNATIVES:= \
200:/usr/bin/nslookup:/usr/libexec/nslookup-bind
CONFLICTS:=bind-nslookup-gssapi
endef
define Package/bind-nslookup-gssapi
$(Package/bind-gssapi/Default)
TITLE+= tools (nslookup) with GSSAPI
ALTERNATIVES:= \
200:/usr/bin/nslookup:/usr/libexec/nslookup-bind
PROVIDES:=bind-nslookup
endef
And that works as expected, the relevant parts of tmp/.config-package.in ends up looking like this:
config PACKAGE_bind-tools
tristate "bind-tools............................... bind administration tools (all)"
default y if DEFAULT_bind-tools
default m if ALL
depends on !(BIND_JEMALLOC) || ((mips||mipsel||mips64||powerpc64||x86_64||arm||aarch64||loongarch64)||(USE_GLIBC&&(powerpc||i386)))
depends on !arc
select PACKAGE_bind-check
select PACKAGE_bind-ddns-confgen if PACKAGE_bind-ddns-confgen-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-delv if PACKAGE_bind-delv-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-dig
select PACKAGE_bind-dnssec if PACKAGE_bind-dnssec-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-host if PACKAGE_bind-host-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-nslookup if PACKAGE_bind-nslookup-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-rndc if PACKAGE_bind-rndc-gssapi<PACKAGE_bind-tools
select PACKAGE_libc
help
bind administration tools (all)
The reference to select PACKAGE_bind-nslookup if PACKAGE_bind-nslookup-gssapi<PACKAGE_bind-tools basically means to select bind-nslookup if bind-nslookup-gssapi hasn’t already been selected, which is what’s intended.
Now, if I try to do the same thing to bind-check by uncommenting the PROVIDES line in the Makefile:
define Package/bind-check
$(Package/bind/Default)
TITLE+= tools (named-checkconf, named-checkzone)
CONFLICTS:=bind-check-gssapi
endef
define Package/bind-check-gssapi
$(Package/bind-gssapi/Default)
TITLE+= tools (named-checkconf, named-checkzone) with GSSAPI
#PROVIDES:=bind-check
endef
make menuconfig goes gaga and starts complaining:
tmp/.config-package.in:98795:error: recursive dependency detected!
tmp/.config-package.in:98795: symbol PACKAGE_bind-tools depends on PACKAGE_bind-tools
For a resolution refer to Documentation/kbuild/kconfig-language.rst
subsection "Kconfig recursive dependency limitations"
And the same section of tmp/.config-package.in suddenly turns into this:
config PACKAGE_bind-tools
tristate "bind-tools............................... bind administration tools (all)"
default y if DEFAULT_bind-tools
default m if ALL
depends on !(BIND_JEMALLOC) || ((mips||mipsel||mips64||powerpc64||x86_64||arm||aarch64||loongarch64)||(USE_GLIBC&&(powerpc||i386)))
depends on !(PACKAGE_bind-check-gssapi<PACKAGE_bind-tools && BIND_JEMALLOC) || ((mips||mipsel||mips64||powerpc64||x86_64||arm||aarch64||loongarch64)||(USE_GLIBC&&(powerpc||i386)))
depends on !(PACKAGE_bind-check-gssapi<PACKAGE_bind-tools) || !arc
depends on !(PACKAGE_bind-delv-gssapi<PACKAGE_bind-tools && BIND_JEMALLOC) || ((mips||mipsel||mips64||powerpc64||x86_64||arm||aarch64||loongarch64)||(USE_GLIBC&&(powerpc||i386)))
depends on !(PACKAGE_bind-delv-gssapi<PACKAGE_bind-tools) || !arc
depends on !arc
select PACKAGE_bind-check if PACKAGE_bind-check-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-ddns-confgen if PACKAGE_bind-ddns-confgen-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-delv if PACKAGE_bind-delv-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-dig
select PACKAGE_bind-dnssec if PACKAGE_bind-dnssec-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-host if PACKAGE_bind-host-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-nslookup if PACKAGE_bind-nslookup-gssapi<PACKAGE_bind-tools
select PACKAGE_bind-rndc if PACKAGE_bind-rndc-gssapi<PACKAGE_bind-tools
select PACKAGE_libc
help
bind administration tools (all)
The depends on !(PACKAGE_bind-check-gssapi<PACKAGE_bind-tools… type of lines above are suddenly added (and seem bogus).
Any idea what I’m doing wrong and/or how I could further debug the whole dependency checking in make menuconfig?