const nimCachePathOverride {.strdefine.} = "" when nimCachePathOverride == "": when defined(release): let nimCachePath = "nimcache/release/" & projectName() else: let nimCachePath = "nimcache/debug/" & projectName() else: let nimCachePath = nimCachePathOverride switch("nimcache", nimCachePath) # `-flto` gives a significant improvement in processing speed, specially hash tree and state transition (basically any CPU-bound code implemented in nim) # With LTO enabled, optimization flags should be passed to both compiler and linker! if defined(release) and not defined(disableLTO): if defined(macosx): # Clang switch("passC", "-flto=thin") switch("passL", "-flto=thin -Wl,-object_path_lto," & nimCachePath & "/lto") elif defined(linux): switch("passC", "-flto=jobserver") switch("passL", "-flto=jobserver") switch("passC", "-finline-limit=100000") switch("passL", "-finline-limit=100000") else: # On windows, LTO needs more love and attention so "gcc-ar" and "gcc-ranlib" are # used for static libraries. discard if defined(windows): # disable timestamps in Windows PE headers - https://wiki.debian.org/ReproducibleBuilds/TimestampsInPEBinaries switch("passL", "-Wl,--no-insert-timestamp") # increase stack size switch("passL", "-Wl,--stack,8388608") # https://github.com/nim-lang/Nim/issues/4057 --tlsEmulation:off if defined(i386): # set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag so we can use PAE, if enabled, and access more than 2 GiB of RAM switch("passL", "-Wl,--large-address-aware") # The dynamic Chronicles output currently prevents us from using colors on Windows # because these require direct manipulations of the stdout File object. switch("define", "chronicles_colors=off") # This helps especially for 32-bit x86, which sans SSE2 and newer instructions # requires quite roundabout code generation for cryptography, and other 64-bit # and larger arithmetic use cases, along with register starvation issues. When # engineering a more portable binary release, this should be tweaked but still # use at least -msse2 or -msse3. if defined(disableMarchNative): if defined(i386) or defined(amd64): switch("passC", "-msse3") switch("passL", "-msse3") else: switch("passC", "-march=native") switch("passL", "-march=native") if defined(windows): # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65782 # ("-fno-asynchronous-unwind-tables" breaks Nim's exception raising, sometimes) switch("passC", "-mno-avx512f") switch("passL", "-mno-avx512f") # omitting frame pointers in nim breaks the GC # https://github.com/nim-lang/Nim/issues/10625 switch("passC", "-fno-omit-frame-pointer") switch("passL", "-fno-omit-frame-pointer") --threads:on --opt:speed --excessiveStackTrace:on # enable metric collection --define:metrics --define:chronicles_line_numbers # for heap-usage-by-instance-type metrics and object base-type strings --define:nimTypeNames # switch("define", "snappy_implementation=libp2p") const currentDir = currentSourcePath()[0 .. ^(len("config.nims") + 1)] switch("define", "nim_compiler_path=" & currentDir & "env.sh nim") switch("define", "withoutPCRE") switch("import", "testutils/moduletests") const useLibStackTrace = not defined(macosx) and not defined(windows) and not defined(disable_libbacktrace) when useLibStackTrace: --define:nimStackTraceOverride switch("import", "libbacktrace") else: --stacktrace:on --linetrace:on # the default open files limit is too low on macOS (512), breaking the # "--debugger:native" build. It can be increased with `ulimit -n 1024`. if not defined(macosx): # add debugging symbols and original files and line numbers --debugger:native --define:nimOldCaseObjects # https://github.com/status-im/nim-confutils/issues/9 # `switch("warning[CaseTransition]", "off")` fails with "Error: invalid command line option: '--warning[CaseTransition]'" switch("warning", "CaseTransition:off") # The compiler doth protest too much, methinks, about all these cases where it can't # do its (N)RVO pass: https://github.com/nim-lang/RFCs/issues/230 switch("warning", "ObservableStores:off") # Too many false positives for "Warning: method has lock level , but another method has 0 [LockLevel]" switch("warning", "LockLevel:off") # Useful for Chronos metrics. #--define:chronosFutureTracking # ############################################################ # # No LTO for crypto # # ############################################################ # This applies per-file compiler flags to C files # which do not support {.localPassC: "-fno-lto".} # Unfortunately this is filename based instead of path-based # Assumes GCC # BLST put("server.always", "-fno-lto") put("assembly.always", "-fno-lto") # Secp256k1 put("secp256k1.always", "-fno-lto") # BearSSL - only RNGs put("aesctr_drbg.always", "-fno-lto") put("hmac_drbg.always", "-fno-lto") put("sysrng.always", "-fno-lto") # Miracl - only ECP to derive public key from private key put("ecp_BLS12381.always", "-fno-lto") # ############################################################ # # Spurious warnings # # ############################################################ # sqlite3.c: In function ‘sqlite3SelectNew’: # vendor/nim-sqlite3-abi/sqlite3.c:124500: warning: function may return address of local variable [-Wreturn-local-addr] put("sqlite3.always", "-fno-lto") # -Wno-return-local-addr