Changeset 71b4444 in mainline for kernel/meson.build

Timestamp:

2023-10-22T16:59:42Z (7 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

78f0422c, dd7df1c

Parents:

590cb6d2 (diff), 2944b5a (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge meson script updates for new toolchain

File:

• kernel/meson.build (modified) (2 diffs)

kernel/meson.build

@@ -89 +89 @@
         '-T', meson.current_build_dir() / '_link.ld',
 ]
+# The kernel is built as ELF but then copied as a blob of bytes and
+# the permissions are not relevant anyway (needed for binutils 2.39+).
+kernel_link_args += ldflags_ignore_rwx_segments
 
 if CONFIG_LTO
@@ -101 +104 @@
 kernel_c_args = arch_kernel_c_args + kernel_defs + [
         '-ffreestanding',
-        # TODO: remove this flag
-        cc.get_supported_arguments([ '-Wno-cast-function-type' ]),
+
+        cc.get_supported_arguments([
+                # TODO: remove this flag
+                '-Wno-cast-function-type',
+
+                # When accessing specific memory addresses that are below
+                # normal page size, the compiler may assume that we actually
+                # dereferenced NULL pointer and warns us about that.
+                # But in kernel we often need to access these addresses
+                # directly hence we need to ignore these warnings.
+                #
+                # TODO: might make more sense to disable this selectively
+                # in specific files (or better yet, for specific lines).
+                '--param=min-pagesize=0',
+        ]),
 ]