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"Global C++ compilation and link flags"

DDS_CPPOPTS = select({

"//:build_macos": [

"-O3",

"-flto=thin",

"-mtune=generic",

"-fPIC",

"-Wpedantic",

"-Wall",

"-Wno-character-conversion",

"-Werror",

],

"//:debug_build_macos": [

"-g",

"-mtune=generic",

"-fPIC",

"-Wpedantic",

"-Wall",

"-Wno-character-conversion",

"-Werror",

],

"//:build_linux": [

"-O3",

"-fPIC",

"-Wpedantic",

"-Wall",

"-Wno-character-conversion",

"-Werror",

],

"//:debug_build_linux": [

"-g",

"-O2",

"-fPIC",

"-Wpedantic",

"-Wall",

"-Wno-character-conversion",

"-Werror",

],

# Optimization (/O2, /Od) and language standard (/std) come from Bazel's

# compilation_mode and the patched MSVC default_cpp_std (/std:c++20).

# Restating them here overrides the toolchain and triggers MSVC D9025.

# /utf-8 must stay in these arms, not a global --cxxopt: wasm-transition

# targets match //:build_wasm and would reject an MSVC-only flag.

"//:build_windows": [

# Without /utf-8, MSVC decodes BOM-less UTF-8 sources in the system ANSI

# codepage; on hosts below CP1252 that raises C4819, which /WX turns into

# error C2220.

"/utf-8",

"/W4",

"/WX",

"/permissive-",

],

"//:debug_build_windows": [

"/Zi",

"/utf-8",

"/W4",

"/WX",

"/permissive-",

],

"//:build_wasm": [

"-O3",

"-flto",

"-std=c++20",

"-Wpedantic",

"-Wall",

"-Werror",

# -fexceptions must precede -fwasm-exceptions: the toolchain's default

# -fno-exceptions is otherwise not overridden at the clang frontend

# level by -fwasm-exceptions alone (it only selects the EH lowering

# mechanism, not the "exceptions enabled" toggle, in this LLVM build).

"-fexceptions",

"-fwasm-exceptions",

],

"//conditions:default": [

"-std=c++20"

],

})

DDS_LOCAL_DEFINES = select({

"//:build_macos": [],

"//:debug_build_macos": [],

"//:build_linux": [],

"//:debug_build_linux": [],

"//:build_wasm": [],

"//conditions:default": [],

}) + select({

"//:debug_all": ["DDS_DEBUG_ALL"],

"//conditions:default": [],

}) + select({

"//:tt_reset_debug": ["DDS_DEBUG_TT_RESET"],

"//conditions:default": [],

}) + select({

"//:ab_stats": ["DDS_AB_STATS"],

"//conditions:default": [],

})

DDS_LINKOPTS = select({

"//:build_macos": ["-flto=thin"],

"//:debug_build_macos": [],

"//:build_linux": [],

"//:debug_build_linux": [],

"//conditions:default": [],

})

# Per-target define to enable scheduler timing when desired.

# Controlled with: --define=scheduler=true

# Usage in BUILD files: local_defines = DDS_LOCAL_DEFINES + DDS_SCHEDULER_DEFINE

DDS_SCHEDULER_DEFINE = select({

"//:scheduler": ["DDS_SCHEDULER"],

"//conditions:default": [],

})