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File ovmf-EmbeddedPkg-Library-Support-SOURCE_DATE_EPOCH-in-Vir.patch of Package ovmf
From 441bc6b75c8edcfa825b324e05f7cd838feac2bb Mon Sep 17 00:00:00 2001 From: "Lee, Chun-Yi" <jlee@suse.com> Date: Thu, 11 Apr 2024 19:36:30 +0800 Subject: [PATCH] EmbeddedPkg/Library: Support SOURCE_DATE_EPOCH in VirtualRealTimeClockLib for reproducible RISC-V ovmf used VirtualRealTimeClockLib but the default epoch is a compilation time. It causes that the RISC-V ovmf binary image is NOT reproducible. This patch added the support of SOURCE_DATE_EPOCH by printenv command. If SOURCE_DATE_EPOCH be found then we use it as BUILD_EPOCH. Otherwise we run date command for setting BUILD_EPOCH. For distributions want a reproducible RISC-V ovmf image, they should export SOURCE_DATE_EPOCH environment variable before building ovmf. References: https://reproducible-builds.org/docs/source-date-epoch/ Signed-off-by: Lee, Chun-Yi <jlee@suse.com> --- .../Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf b/EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf index 5d0f867eb6..0bd6bcee75 100644 --- a/EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf +++ b/EmbeddedPkg/Library/VirtualRealTimeClockLib/VirtualRealTimeClockLib.inf @@ -34,4 +34,4 @@ # Current usage of this library expects GCC in a UNIX-like shell environment with the date command [BuildOptions] - GCC:*_*_*_CC_FLAGS = -DBUILD_EPOCH=`date +%s` + GCC:*_*_*_CC_FLAGS = -DBUILD_EPOCH=`printenv SOURCE_DATE_EPOCH || date +%s` -- 2.44.0
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