[build] Use -malign-double to build 32-bit UEFI binaries

The EDK2 codebase uses -malign-double for 32-bit builds, which causes 64-bit integers to be naturally aligned. This affects the layout of some structures (including EFI_BLOCK_IO_MEDIA). This mirrors wimboot commit 7b8f39d ("[build] Fix building of 32-bit UEFI version"). Signed-off-by: Michael Brown <mcb30@ipxe.org>
ipxe · Sep 24, 2014 · a3d8607 · a3d8607
1 parent 6a22170
commit a3d8607
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/arch/i386/Makefile.efi b/src/arch/i386/Makefile.efi
@@ -4,6 +4,10 @@
 #
 ELF2EFI		= $(ELF2EFI32)
 
+# Use EFI ABI
+#
+CFLAGS		+= -malign-double
+
 # Include generic EFI Makefile
 #
 MAKEDEPS	+= arch/x86/Makefile.efi