From df4d2000a22db673a788b8e57e8e7c0cc3cee777 Mon Sep 17 00:00:00 2001 From: Leonard Chan Date: Thu, 3 Oct 2019 18:53:04 -0700 Subject: Make vboot_version extern in header When enabling `-fno-common` in Fuchsia, we get a bunch of linker errors when linking futility: ``` ld.lld: error: duplicate symbol: vboot_version >>> defined at futility.h:43 (../../third_party/vboot_reference/futility/futility.h:43) >>> host_x63-asan_no_detect_leaks/obj/third_party/vboot_reference/futility/futility.cmd_bdb.c.o:(vboot_version) >>> defined at futility.h:43 (../../third_party/vboot_reference/futility/futility.h:43) >>> host_x64-asan_no_detect_leaks/obj/third_party/vboot_reference/futility/futility.cmd_create.c.o:(.bss.vboot_version+0x0) ``` and think this is because -fno-common places vboot_version for unitialized global variables in the BSS section of each object file. Making it extern instead resolves each reference to its definition in futility/misc.c. Change-Id: I591f07abd1f975a8a9d078bb4366e2e0861390b4 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1839207 Reviewed-by: Julius Werner Reviewed-by: Joel Kitching Commit-Queue: Julius Werner Tested-by: Julius Werner --- futility/futility.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/futility/futility.h b/futility/futility.h index 3bce1106..5dc426dd 100644 --- a/futility/futility.h +++ b/futility/futility.h @@ -41,7 +41,7 @@ enum vboot_version { }; /* What's our preferred API & data format? */ -enum vboot_version vboot_version; +extern enum vboot_version vboot_version; /* Here's a structure to define the commands that futility implements. */ struct futil_cmd_t { -- cgit v1.2.1