"-DCMAKE_C_FLAGS" in local.mk is ignored?

[sys9kdr]

Problem

I set -DCMAKE_C_FLAGS in local.mk and built neovim.
But CMAKE_C_FLAGS is missed in :verbose version.

"-DCMAKE_C_FLAGS" in local.mk is ignored?

# local.mk
CMAKE_BUILD_TYPE := RelWithDebInfo
CMAKE_EXTRA_FLAGS="-DCMAKE_C_FLAGS=-O3 -march=native -flto"

:verbose version
NVIM v0.10.0-dev-5e5f517
Build type: RelWithDebInfo
LuaJIT 2.1.1697887905
Compilation: /usr/bin/cc -O2 -g -Og -g -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-protot
ypes -std=gnu99 -Wshadow -Wconversion -Wvla -Wdouble-promotion -Wmissing-noreturn -Wmissing-format-a
ttribute -Wmissing-prototypes -fno-common -Wno-unused-result -Wimplicit-fallthrough -fdiagnostics-co
lor=always -fstack-protector-strong -DUNIT_TESTING -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -D
NVIM_TS_HAS_SET_MAX_START_DEPTH -I/home/myname/workspace/neovim/.deps/usr/include/luajit-2.1 -I/usr
/include -I/home/myname/workspace/neovim/.deps/usr/include -I/home/myname/workspace/neovim/build/s
rc/nvim/auto -I/home/myname/workspace/neovim/build/include -I/home/myname/workspace/neovim/build/c
make.config -I/home/myname/workspace/neovim/src

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/share/nvim"

Run :checkhealth for more info
Press ENTER or type command to contin

Steps to reproduce

1. create local.mk at project root.

# local.mk
CMAKE_BUILD_TYPE := RelWithDebInfo
CMAKE_EXTRA_FLAGS="-DCMAKE_C_FLAGS=-O3 -march=native -flto"

2. make and sudo make install

3. nvim and :verbose version. options I set in are missed.

:verbose version
NVIM v0.10.0-dev-5e5f517
Build type: RelWithDebInfo
LuaJIT 2.1.1697887905
Compilation: /usr/bin/cc -O2 -g -Og -g -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-protot
ypes -std=gnu99 -Wshadow -Wconversion -Wvla -Wdouble-promotion -Wmissing-noreturn -Wmissing-format-a
ttribute -Wmissing-prototypes -fno-common -Wno-unused-result -Wimplicit-fallthrough -fdiagnostics-co
lor=always -fstack-protector-strong -DUNIT_TESTING -DINCLUDE_GENERATED_DECLARATIONS -D_GNU_SOURCE -D
NVIM_TS_HAS_SET_MAX_START_DEPTH -I/home/myname/workspace/neovim/.deps/usr/include/luajit-2.1 -I/usr
/include -I/home/myname/workspace/neovim/.deps/usr/include -I/home/myname/workspace/neovim/build/s
rc/nvim/auto -I/home/myname/workspace/neovim/build/include -I/home/myname/workspace/neovim/build/c
make.config -I/home/myname/workspace/neovim/src

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/share/nvim"

Run :checkhealth for more info
Press ENTER or type command to contin

Expected behavior

Compilation: /usr/bin/cc -O3 -march=native -flto ... is displayed in :verbose version.

Neovim version (nvim -v)

NVIM v0.10.0-dev-5e5f517

Vim (not Nvim) behaves the same?

Operating system/version

Ubuntu 22.04(WSL)

Terminal name/version

wsltty

$TERM environment variable

xterm

Installation

build from repo

[dundargoc]

Nah, they're not ignored, they're just not shown in version output. Grep the build files for the flags you're looking for and they should be there.

I think the flags in CMAKE_C_FLAGS aren't added to version currently. I'll take a look.

[sys9kdr]

I found that line in ./cmake.config/versiondef.h.in

#define NVIM_VERSION_CFLAGS "${CMAKE_C_COMPILER} $<$<CONFIG:Debug>:${CMAKE_C_FLAGS_DEBUG}>$<$<CONFIG:Release>:${CMAKE_C_FLAGS_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_C_FLAGS_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_C_FLAGS_MINSIZEREL}> $<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_OPTIONS>, > -D$<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_DEFINITIONS>, -D> -I$<JOIN:$<REMOVE_DUPLICATES:$<TARGET_PROPERTY:nvim,INCLUDE_DIRECTORIES>>, -I>"

there is no CMAKE_C_FLAGS.