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[kvm-unit-tests,v3,2/5] Makefile: Prepare for clang EFI builds

Message ID 20240911091406.134240-9-andrew.jones@linux.dev (mailing list archive)
State Handled Elsewhere
Headers show
Series Support cross compiling with clang | expand

Commit Message

Andrew Jones Sept. 11, 2024, 9:14 a.m. UTC 
clang complains about GNU extensions such as variable sized types not
being at the end of structs unless -Wno-gnu is used. We may
eventually want -Wno-gnu, but for now let's just handle the warnings
as they come. Add -Wno-gnu-variable-sized-type-not-at-end to avoid
the warning issued for the initrd_dev_path struct. (Eliminating the
warning is preferred to reworking the struct, because the
implementation is imported verbatim from Linux.)

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Jones <andrew.jones@linux.dev>
---
 Makefile | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/Makefile b/Makefile
index 3d51cb726120..7471f7285b78 100644
--- a/Makefile
+++ b/Makefile
@@ -50,6 +50,8 @@  EFI_CFLAGS += -fshort-wchar
 # EFI applications use PIC as they are loaded to dynamic addresses, not a fixed
 # starting address
 EFI_CFLAGS += -fPIC
+# Avoid error with the initrd_dev_path struct
+EFI_CFLAGS += -Wno-gnu-variable-sized-type-not-at-end
 # Create shared library
 EFI_LDFLAGS := -Bsymbolic -shared -nostdlib
 endif