[CMake] Add -Wl,-z,pack-relative-relocs if supported#208217
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We should aim to provide a good experience by default. Enable RELR for PIC builds (which is on by default, even in non-dylib builds) if supported by the linker (feature-tested) and the libc (currently hardcoded as glibc 2.36+; musl has no easy way to determine support). Reviewers: MaskRay
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We should aim to provide a good experience by default. Enable RELR for PIC builds (which is on by default, even in non-dylib builds) if supported by the linker (feature-tested) and the libc (currently hardcoded as glibc 2.36+; musl has no easy way to determine support).
RELR substantially reduces the size of the dynamic relocations in PIE executables and shared libraries and therefore also lowers max-rss and startup time due to fewer page faults.