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HBSD: Compile (nearly) all of HardenedBSD world with LTO on amd64 As an initial first step towards supporting Cross-DSO CFI, build both static and shared libraries with LTO. Prior to this commit, only applications were compiled with LTO. This commit is somewhat conservative in that we only turn LTO-ified libs on amd64. I plan to enable LTO-ified libs on arm64 with additional testing. Compiling all of base with LTO is incredibly memory intensive. In memory-constrained systems, one may need to adjust how many make jobs based on available memory (eg, `make -j 4` rather than `make -j 8`). As of this commit, I do not have firm numbers. To disable compiling libraries with LTO, set WITHOUT_LTOLIB in src.conf(5). Bump __HardenedBSD_version to account for this change. When arm64 support is added, an additional bump will be done. As of right now, there is no plan to MFC to 13-STABLE. Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org> Issue: #54

2021-05-28 15:39:28 +02:00

Set to build static and shared libraries with LTO.