um: Allow static linking for non-glibc implementations
It is possible to produce a statically linked UML binary with UML_NET_VECTOR,
UML_NET_VDE and UML_NET_PCAP options enabled using alternative libc
implementations, which do not rely on NSS, such as musl.
Allow static linking in this case.
Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Tested-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index eb51fec..f59defe 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -62,12 +62,12 @@
source "arch/$(HEADER_ARCH)/um/Kconfig"
-config FORBID_STATIC_LINK
- bool
+config MAY_HAVE_RUNTIME_DEPS
+ bool
config STATIC_LINK
bool "Force a static link"
- depends on !FORBID_STATIC_LINK
+ depends on CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS || !MAY_HAVE_RUNTIME_DEPS
help
This option gives you the ability to force a static link of UML.
Normally, UML is linked as a shared binary. This is inconvenient for
diff --git a/arch/um/drivers/Kconfig b/arch/um/drivers/Kconfig
index 9160ead..2e7b8e0 100644
--- a/arch/um/drivers/Kconfig
+++ b/arch/um/drivers/Kconfig
@@ -234,7 +234,7 @@
config UML_NET_VECTOR
bool "Vector I/O high performance network devices"
depends on UML_NET
- select FORBID_STATIC_LINK
+ select MAY_HAVE_RUNTIME_DEPS
help
This User-Mode Linux network driver uses multi-message send
and receive functions. The host running the UML guest must have
@@ -246,7 +246,7 @@
config UML_NET_VDE
bool "VDE transport (obsolete)"
depends on UML_NET
- select FORBID_STATIC_LINK
+ select MAY_HAVE_RUNTIME_DEPS
help
This User-Mode Linux network transport allows one or more running
UMLs on a single host to communicate with each other and also
@@ -294,7 +294,7 @@
config UML_NET_PCAP
bool "pcap transport (obsolete)"
depends on UML_NET
- select FORBID_STATIC_LINK
+ select MAY_HAVE_RUNTIME_DEPS
help
The pcap transport makes a pcap packet stream on the host look
like an ethernet device inside UML. This is useful for making