[xen master] xen: Add Darwin.mk

[patchbot@xxxxxxx]

commit 2fa468919c39aac189623b6c580ce4ff8592d799
Author:     Bertrand Marquis <bertrand.marquis@xxxxxxx>
AuthorDate: Tue Feb 10 10:24:18 2026 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Feb 10 10:24:18 2026 +0100

    xen: Add Darwin.mk
    
    Xen does not provide a Darwin build configuration useable on Mac OS.
    It is possible to build Xen Hypervisor (tools are not supported) with a
    toolchain able to produce ELF binaries (GCC or others).
    
    Add config/Darwin.mk to include StdGNU.mk and force
    XEN_COMPILE_ARCH=unknown, ensuring Darwin builds always follow
    the cross-compile path so compiling on Mac OS is always handled as a
    cross compilation case.
    
    Only compiling the hypervisor has been tested !
    
    An example of how to build the hypervisor for arm64 on Mac OS
    (tools cannot be build for now) using a compiler from brew:
    - brew install aarch64-elf-gcc aarch64-elf-binutils
    - make XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-elf- HOSTCC=clang -C xen
    
    Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 config/Darwin.mk | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/config/Darwin.mk b/config/Darwin.mk
new file mode 100644
index 0000000000..de4a0afab7
--- /dev/null
+++ b/config/Darwin.mk
@@ -0,0 +1,7 @@
+# Use GNU tool definitions as the tools we are using are either GNU compatible
+# or we only use features which are supported on Mac OS.
+include $(XEN_ROOT)/config/StdGNU.mk
+
+# Force cross compile on Mac OS: Only hypervisor build is supported, no tools,
+# and in the hypervisor the (plain) SVR4 ABI is in use.
+XEN_COMPILE_ARCH = unknown
--
generated by git-patchbot for /home/xen/git/xen.git#master