logos-messaging-nim/config.nims

import os

if defined(release):
  switch("nimcache", "nimcache/release/$projectName")
else:
  switch("nimcache", "nimcache/debug/$projectName")

if defined(windows):
  if not defined(disable_rln):
    switch("passL", "rln.lib")
  switch("define", "postgres=false")

  # 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")

# https://github.com/status-im/nimbus-eth2/blob/stable/docs/cpu_features.md#ssse3-supplemental-sse3
# suggests that SHA256 hashing with SSSE3 is 20% faster than without SSSE3, so
# given its near-ubiquity in the x86 installed base, it renders a distribution
# build more viable on an overall broader range of hardware.
#
if defined(disableMarchNative):
  if defined(i386) or defined(amd64):
    if defined(macosx):
      # macOS Catalina is EOL as of 2022-09
      # https://support.apple.com/kb/sp833
      # "macOS Big Sur - Technical Specifications" lists current oldest
      # supported models: MacBook (2015 or later), MacBook Air (2013 or later),
      # MacBook Pro (Late 2013 or later), Mac mini (2014 or later), iMac (2014
      # or later), iMac Pro (2017 or later), Mac Pro (2013 or later).
      #
      # These all have Haswell or newer CPUs.
      #
      # This ensures AVX2, AES-NI, PCLMUL, BMI1, and BMI2 instruction set support.
      switch("passC", "-march=haswell -mtune=generic")
      switch("passL", "-march=haswell -mtune=generic")
    else:
      if defined(marchOptimized):
        # -march=broadwell: https://github.com/status-im/nimbus-eth2/blob/stable/docs/cpu_features.md#bmi2--adx
        # Changed to x86-64-v2 for broader support
        switch("passC", "-march=x86-64-v2 -mtune=generic")
        switch("passL", "-march=x86-64-v2 -mtune=generic")
      else:
        switch("passC", "-mssse3")
        switch("passL", "-mssse3")
elif defined(macosx) and defined(arm64):
  # Apple's Clang can't handle "-march=native" on M1: https://github.com/status-im/nimbus-eth2/issues/2758
  switch("passC", "-mcpu=apple-m1")
  switch("passL", "-mcpu=apple-m1")
else:
  if not defined(android):
    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")

when defined(macosx):
  # TEMPORARY (added 2026-06-19) — remove once nim-chronos is fixed/bumped upstream.
  #
  # macOS / Apple Clang 16+ promotes -Wincompatible-function-pointer-types to a
  # DEFAULT error (not gated behind -Werror). It fires on a dependency↔dependency
  # call in nim-chronos — none of our code is involved:
  #   chronos/streams/tlsstream.nim:718  ctx.setdest(itemAppend, ...)
  # chronos declares the PEM callback `itemAppend(ctx, pbytes: pointer, nbytes)`
  # while bearssl's `br_pem_decoder_setdest` expects `pbytes: const void*`. The
  # callback only READS the buffer (copyMem from pbytes), so the missing `const`
  # is benign — we demote the diagnostic back to a warning instead of failing.
  #
  # Why it appeared now (not a change on our side): the `const` was introduced in
  # nim-bearssl v0.2.9, published 2026-06-19 11:22 UTC. CI does not honor the
  # locked bearssl (nimble.lock pins 0.2.8) and fresh-resolves to latest, so any
  # run after 11:22 UTC picks up 0.2.9 and hits this. Earlier-running PRs that
  # resolved 0.2.8 are green only by timing; re-running them now reproduces it.
  #
  # Proper fix: chronos should declare `itemAppend`'s `pbytes` as `const pointer`.
  switch("passC", "-Wno-error=incompatible-function-pointer-types")

--threads:
  on
--opt:
  speed

--excessiveStackTrace:
  on
# enable metric collection
--define:
  metrics
# for heap-usage-by-instance-type metrics and object base-type strings
--define:
  nimTypeNames

# 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) and not defined(android):
  # add debugging symbols and original files and line numbers
  --debugger:
    native
  when defined(enable_libbacktrace):
    # light-weight stack traces using libbacktrace and libunwind
    # opt-in: pass -d:enable_libbacktrace (requires libbacktrace in project deps)
    --define:
      nimStackTraceOverride
    switch("import", "libbacktrace")

--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 <unknown>, but another method has 0 [LockLevel]"
switch("warning", "LockLevel:off")

if defined(android):
  var clang = getEnv("ANDROID_COMPILER")
  var ndk_home = getEnv("ANDROID_TOOLCHAIN_DIR")
  var sysroot = ndk_home & "/sysroot"
  var cincludes = sysroot & "/usr/include/" & getEnv("ANDROID_ARCH")

  switch("clang.path", ndk_home & "/bin")
  switch("clang.exe", clang)
  switch("clang.linkerexe", clang)
  switch("passC", "--sysroot=" & sysRoot)
  switch("passL", "--sysroot=" & sysRoot)
  switch("cincludes", sysRoot & "/usr/include/")

# begin Nimble config (version 2)
--noNimblePath
when withDir(thisDir(), system.fileExists("nimble.paths")):
  include "nimble.paths"
# end Nimble config