122 lines
5.0 KiB
Nim
122 lines
5.0 KiB
Nim
import strutils
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if defined(release):
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switch("nimcache", "nimcache/release/$projectName")
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else:
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switch("nimcache", "nimcache/debug/$projectName")
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if defined(windows):
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# disable timestamps in Windows PE headers - https://wiki.debian.org/ReproducibleBuilds/TimestampsInPEBinaries
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switch("passL", "-Wl,--no-insert-timestamp")
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# increase stack size, unless something else is setting the stack size
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if not defined(windowsNoSetStack):
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switch("passL", "-Wl,--stack,8388608")
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# https://github.com/nim-lang/Nim/issues/4057
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--tlsEmulation:off
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if defined(i386):
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# set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag so we can use PAE, if enabled, and access more than 2 GiB of RAM
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switch("passL", "-Wl,--large-address-aware")
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# Avoid some rare stack corruption while using exceptions with a SEH-enabled
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# toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
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switch("define", "nimRawSetjmp")
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# This helps especially for 32-bit x86, which sans SSE2 and newer instructions
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# requires quite roundabout code generation for cryptography, and other 64-bit
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# and larger arithmetic use cases, along with register starvation issues. When
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# engineering a more portable binary release, this should be tweaked but still
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# use at least -msse2 or -msse3.
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#
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# https://github.com/status-im/nimbus-eth2/blob/stable/docs/cpu_features.md#ssse3-supplemental-sse3
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# suggests that SHA256 hashing with SSSE3 is 20% faster than without SSSE3, so
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# given its near-ubiquity in the x86 installed base, it renders a distribution
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# build more viable on an overall broader range of hardware.
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#
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if defined(disableMarchNative):
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if defined(i386) or defined(amd64):
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if defined(macosx):
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# https://support.apple.com/kb/SP777
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# "macOS Mojave - Technical Specifications": EOL as of 2021-10 so macOS
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# users on pre-Nehalem must be running either some Hackintosh, or using
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# an unsupported macOS version beyond that most recently EOL'd. Nehalem
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# supports instruction set extensions through SSE4.2 and POPCNT.
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switch("passC", "-march=nehalem")
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switch("passL", "-march=nehalem")
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else:
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switch("passC", "-mssse3")
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switch("passL", "-mssse3")
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elif defined(macosx) and defined(arm64):
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# Apple's Clang can't handle "-march=native" on M1: https://github.com/status-im/nimbus-eth2/issues/2758
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switch("passC", "-mcpu=apple-a14")
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switch("passL", "-mcpu=apple-a14")
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else:
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switch("passC", "-march=native")
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switch("passL", "-march=native")
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if defined(windows):
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65782
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# ("-fno-asynchronous-unwind-tables" breaks Nim's exception raising, sometimes)
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switch("passC", "-mno-avx512f")
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switch("passL", "-mno-avx512f")
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# Omitting frame pointers in nim breaks the GC:
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# https://github.com/nim-lang/Nim/issues/10625
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if not defined(windows):
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# ...except on Windows where the Nim bug doesn't manifest and the option
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# crashes GCC in some Mingw-w64 versions:
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# https://sourceforge.net/p/mingw-w64/bugs/880/
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86593
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switch("passC", "-fno-omit-frame-pointer")
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switch("passL", "-fno-omit-frame-pointer")
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--threads:on
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--opt:speed
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--excessiveStackTrace:on
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# enable metric collection
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--define:metrics
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# for heap-usage-by-instance-type metrics and object base-type strings
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--define:nimTypeNames
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switch("define", "withoutPCRE")
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when not defined(disable_libbacktrace):
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--define:nimStackTraceOverride
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switch("import", "libbacktrace")
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else:
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--stacktrace:on
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--linetrace:on
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var canEnableDebuggingSymbols = true
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if defined(macosx):
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# The default open files limit is too low on macOS (512), breaking the
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# "--debugger:native" build. It can be increased with `ulimit -n 1024`.
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let openFilesLimitTarget = 1024
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var openFilesLimit = 0
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try:
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openFilesLimit = staticExec("ulimit -n").strip(chars = Whitespace + Newlines).parseInt()
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if openFilesLimit < openFilesLimitTarget:
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echo "Open files limit too low to enable debugging symbols and lightweight stack traces."
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echo "Increase it with \"ulimit -n " & $openFilesLimitTarget & "\""
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canEnableDebuggingSymbols = false
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except:
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echo "ulimit error"
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# We ignore this resource limit on Windows, where a default `ulimit -n` of 256
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# in Git Bash is apparently ignored by the OS, and on Linux where the default of
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# 1024 is good enough for us.
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if canEnableDebuggingSymbols:
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# add debugging symbols and original files and line numbers
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--debugger:native
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--define:nimOldCaseObjects # https://github.com/status-im/nim-confutils/issues/9
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# `switch("warning[CaseTransition]", "off")` fails with "Error: invalid command line option: '--warning[CaseTransition]'"
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switch("warning", "CaseTransition:off")
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# The compiler doth protest too much, methinks, about all these cases where it can't
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# do its (N)RVO pass: https://github.com/nim-lang/RFCs/issues/230
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switch("warning", "ObservableStores:off")
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# Too many false positives for "Warning: method has lock level <unknown>, but another method has 0 [LockLevel]"
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switch("warning", "LockLevel:off")
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