Autoconf has a builtin check to try figure out how to make the compiler error out on implicit function declarations. This check necessarily emits such a warning/error. We know that -Werror=implicit-function-declaration will work on any compiler we care about, so just force that to avoid noise.
This means we don't have to try whitelist 'strchr'. v2: drop 'export' as PMS doesn't allow it in make.defaults. Signed-off-by: Sam James <[email protected]> --- profiles/base/make.defaults | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/profiles/base/make.defaults b/profiles/base/make.defaults index ab69dbfae58ee..68ff36a90cc8d 100644 --- a/profiles/base/make.defaults +++ b/profiles/base/make.defaults @@ -181,3 +181,9 @@ ADA_TARGET="gnat_2021" # Default targets for lua{,-single}.eclass LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" + +# Sam James <[email protected]> (2023-02-28) +# Reduce -Wimplicit-function-declaration noise from autoconf. Any compilers +# we care about should match these anyway. See https://wiki.gentoo.org/wiki/Modern_C_porting. +ac_cv_c_undeclared_builtin_options="none needed" +gl_cv_compiler_check_decl_option="-Werror=implicit-function-declaration" -- 2.39.2
