211 lines
8.3 KiB
Nim
211 lines
8.3 KiB
Nim
import strutils
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const nimCachePathOverride {.strdefine.} = ""
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when nimCachePathOverride == "":
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when defined(release):
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let nimCachePath = "nimcache/release/" & projectName()
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else:
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let nimCachePath = "nimcache/debug/" & projectName()
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else:
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let nimCachePath = nimCachePathOverride
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switch("nimcache", nimCachePath)
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# `-flto` gives a significant improvement in processing speed, specially hash tree and state transition (basically any CPU-bound code implemented in nim)
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# With LTO enabled, optimization flags should be passed to both compiler and linker!
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if defined(release) and not defined(disableLTO):
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# "-w" is not passed to the compiler during linking, so we need to disable
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# some warnings by hand.
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switch("passL", "-Wno-stringop-overflow -Wno-stringop-overread")
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if defined(macosx): # Clang
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switch("passC", "-flto=thin")
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switch("passL", "-flto=thin -Wl,-object_path_lto," & nimCachePath & "/lto")
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elif defined(linux):
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switch("passC", "-flto=jobserver")
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switch("passL", "-flto=jobserver")
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switch("passC", "-finline-limit=100000")
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switch("passL", "-finline-limit=100000")
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else:
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# On windows, LTO needs more love and attention so "gcc-ar" and "gcc-ranlib" are
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# used for static libraries.
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discard
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# show C compiler warnings
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if defined(cwarnings):
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let common_gcc_options = "-Wno-discarded-qualifiers -Wno-incompatible-pointer-types"
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if defined(windows):
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put("gcc.options.always", "-mno-ms-bitfields " & common_gcc_options)
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put("clang.options.always", "-mno-ms-bitfields " & common_gcc_options)
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else:
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put("gcc.options.always", common_gcc_options)
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put("clang.options.always", common_gcc_options)
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if defined(limitStackUsage):
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# This limits stack usage of each individual function to 1MB - the option is
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# available on some GCC versions but not all - run with `-d:limitStackUsage`
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# and look for .su files in "./build/", "./nimcache/" or $TMPDIR that list the
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# stack size of each function.
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switch("passC", "-fstack-usage -Werror=stack-usage=1048576")
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switch("passL", "-fstack-usage -Werror=stack-usage=1048576")
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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
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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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# The dynamic Chronicles output currently prevents us from using colors on Windows
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# because these require direct manipulations of the stdout File object.
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switch("define", "chronicles_colors=off")
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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
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# https://support.apple.com/kb/SP803
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# "macOS Catalina - Technical Specifications" lists current oldest
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# supported models: MacBook Air (Mid 2012 or newer), MacBook Pro
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# (Mid 2012 or newer), Mac mini (Late 2012 or newer), and iMac (Late 2012
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# or newer). These all have Ivy Bridge CPUs or newer.
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#
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# This ensures AVX, AES, PCLMUL, FSGSBASE, RDRND, and F16C instruction
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# set support.
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switch("passC", "-march=ivybridge")
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switch("passL", "-march=ivybridge")
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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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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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--define:chronicles_line_numbers # These are disabled for release binaries
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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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const currentDir = currentSourcePath()[0 .. ^(len("config.nims") + 1)]
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switch("define", "nim_compiler_path=" & currentDir & "env.sh nim")
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switch("define", "withoutPCRE")
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switch("import", "testutils/moduletests")
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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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# Useful for Chronos metrics.
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#--define:chronosFutureTracking
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# ############################################################
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#
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# No LTO for crypto
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#
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# ############################################################
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# This applies per-file compiler flags to C files
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# which do not support {.localPassC: "-fno-lto".}
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# Unfortunately this is filename based instead of path-based
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# Assumes GCC
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# BLST
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put("server.always", "-fno-lto")
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put("assembly.always", "-fno-lto")
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# Secp256k1
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put("secp256k1.always", "-fno-lto")
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# BearSSL - only RNGs
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put("aesctr_drbg.always", "-fno-lto")
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put("hmac_drbg.always", "-fno-lto")
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put("sysrng.always", "-fno-lto")
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# Miracl - only ECP to derive public key from private key
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put("ecp_BLS12381.always", "-fno-lto")
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# ############################################################
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#
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# Spurious warnings
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#
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# ############################################################
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# sqlite3.c: In function ‘sqlite3SelectNew’:
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# vendor/nim-sqlite3-abi/sqlite3.c:124500: warning: function may return address of local variable [-Wreturn-local-addr]
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put("sqlite3.always", "-fno-lto") # -Wno-return-local-addr
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