From ed40567dde2ae1b1f8b0dc0e589093c8b357d713 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
Date: Tue, 19 Mar 2024 15:00:45 +0000
Subject: formatters: export a RUST_TARGET env variable for cross builds
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This the value to be passed to 'cargo --target NAME' when doing
a cross compiled build.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 lcitool/formatters.py |  7 +++++++
 lcitool/util.py       | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/lcitool/formatters.py b/lcitool/formatters.py
index ed8cecd..f057e2f 100644
--- a/lcitool/formatters.py
+++ b/lcitool/formatters.py
@@ -95,6 +95,7 @@ class Formatter(metaclass=abc.ABCMeta):
             "cross_arch": None,
             "cross_abi": None,
             "cross_arch_deb": None,
+            "cross_rust_target": None,
 
             "mappings": [pkg.mapping for pkg in pkgs.values()],
             "pkgs": package_names["native"],
@@ -111,6 +112,9 @@ class Formatter(metaclass=abc.ABCMeta):
                 cross_arch_deb = util.native_arch_to_deb_arch(target.cross_arch)
                 varmap["cross_arch_deb"] = cross_arch_deb
 
+            if "rust" in varmap["mappings"]:
+                varmap["cross_rust_target"] = util.native_arch_to_rust_target(varmap["cross_arch"])
+
         log.debug(f"Generated varmap: {varmap}")
         return varmap
 
@@ -440,6 +444,9 @@ class BuildEnvFormatter(Formatter):
             else:
                 env["MESON_OPTS"] = "--cross-file=" + varmap["cross_abi"]
 
+        if "rust" in varmap["mappings"]:
+            env["RUST_TARGET"] = varmap["cross_rust_target"]
+
         return env
 
 
diff --git a/lcitool/util.py b/lcitool/util.py
index 1123348..fd385d8 100644
--- a/lcitool/util.py
+++ b/lcitool/util.py
@@ -197,6 +197,25 @@ def native_arch_to_deb_arch(native_arch):
     return archmap[native_arch]
 
 
+def native_arch_to_rust_target(native_arch):
+    archmap = {
+        "aarch64": "aarch64-unknown-linux-gnu",
+        "armv6l": "armv5te-unknown-linux-gnueabi",
+        "armv7l": "armv7-unknown-linux-gnueabihf",
+        "i686": "i686-unknown-linux-gnu",
+        "mips": "mips-unknown-linux-gnu",
+        "mipsel": "mipsel-unknown-linux-gnu",
+        "mips64el": "mips64el-unknown-linux-gnuabi64",
+        "ppc64le": "powerpc64le-unknown-linux-gnu",
+        "riscv64": "riscv64gc-unknown-linux-gnu",
+        "s390x": "s390x-unknown-linux-gnu",
+        "x86_64": "x86_64-unknown-linux-gnu",
+    }
+    if native_arch not in archmap:
+        raise ValueError(f"Unsupported rust target {native_arch}")
+    return archmap[native_arch]
+
+
 def generate_file_header(cliargv):
     url = "https://gitlab.com/libvirt/libvirt-ci"
 
-- 
cgit v1.1