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.
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/ Cc: Pete Batard pete@akeo.ie Cc: Ard Biesheuvel ard.biesheuvel@linaro.org