mirror of
https://github.com/AuxXxilium/kmod.git
synced 2024-11-23 15:00:52 +07:00
d4f659e12a
Some are outdated, misleading or just repeat the same thing over and over. Remove them as they are not needed. Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://lore.kernel.org/r/20240723185921.1005569-3-lucas.de.marchi@gmail.com Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
273 lines
8.8 KiB
Plaintext
273 lines
8.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-or-later WITH Autoconf-exception-macro
|
|
#
|
|
# Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
|
|
# Copyright (c) 2006-2008 xine project
|
|
# Copyright (c) 2012 Lucas De Marchi <lucas.de.marchi@gmail.com>
|
|
|
|
AC_DEFUN([CC_CHECK_FLAG_APPEND], [
|
|
AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
|
|
AS_TR_SH([cc_cv_$2_$3]),
|
|
[eval "AS_TR_SH([cc_save_$2])='${$2}'"
|
|
eval "AS_TR_SH([$2])='-Werror `echo "$3" | sed 's/^-Wno-/-W/'`'"
|
|
AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; } ])],
|
|
[eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
|
|
[eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
|
|
eval "AS_TR_SH([$2])='$cc_save_$2'"])
|
|
|
|
AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
|
|
[eval "$1='${$1} $3'"])
|
|
])
|
|
|
|
dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2])
|
|
AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
|
|
for flag in $3; do
|
|
CC_CHECK_FLAG_APPEND($1, $2, $flag)
|
|
done
|
|
])
|
|
|
|
dnl Check if the flag is supported by linker (cacheable)
|
|
dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
|
|
|
|
|
|
dnl Check if the flag is supported by linker
|
|
dnl CC_CHECK_LDFLAGS_SILENT([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
|
|
AC_DEFUN([CC_CHECK_LDFLAGS_SILENT], [
|
|
AC_CACHE_VAL(AS_TR_SH([cc_cv_ldflags_$1]),
|
|
[ac_save_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="$LDFLAGS $1"
|
|
AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 1; }])],
|
|
[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
|
|
[eval "AS_TR_SH([cc_cv_ldflags_$1])="])
|
|
LDFLAGS="$ac_save_LDFLAGS"
|
|
])
|
|
|
|
AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
|
|
[$2], [$3])
|
|
])
|
|
|
|
dnl Check if the flag is supported by linker (cacheable)
|
|
dnl CC_CHECK_LDFLAGS([FLAG], [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND])
|
|
|
|
AC_DEFUN([CC_CHECK_LDFLAGS], [
|
|
AC_CACHE_CHECK([if $CC supports $1 flag],
|
|
AS_TR_SH([cc_cv_ldflags_$1]),
|
|
CC_CHECK_LDFLAGS_SILENT([$1]) dnl Don't execute actions here!
|
|
)
|
|
|
|
AS_IF([eval test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes],
|
|
[$2], [$3])
|
|
])
|
|
|
|
dnl define the LDFLAGS_NOUNDEFINED variable with the correct value for
|
|
dnl the current linker to avoid undefined references in a shared object.
|
|
AC_DEFUN([CC_NOUNDEFINED], [
|
|
dnl We check $host for which systems to enable this for.
|
|
AC_REQUIRE([AC_CANONICAL_HOST])
|
|
|
|
case $host in
|
|
dnl FreeBSD (et al.) does not complete linking for shared objects when pthreads
|
|
dnl are requested, as different implementations are present; to avoid problems
|
|
dnl use -Wl,-z,defs only for those platform not behaving this way.
|
|
*-freebsd* | *-openbsd*) ;;
|
|
*)
|
|
dnl First of all check for the --no-undefined variant of GNU ld. This allows
|
|
dnl for a much more readable command line, so that people can understand what
|
|
dnl it does without going to look for what the heck -z defs does.
|
|
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
|
|
CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
|
|
break
|
|
done
|
|
;;
|
|
esac
|
|
|
|
AC_SUBST([LDFLAGS_NOUNDEFINED])
|
|
])
|
|
|
|
dnl Check for a -Werror flag or equivalent. -Werror is the GCC
|
|
dnl and ICC flag that tells the compiler to treat all the warnings
|
|
dnl as fatal. We usually need this option to make sure that some
|
|
dnl constructs (like attributes) are not simply ignored.
|
|
dnl
|
|
dnl Other compilers don't support -Werror per se, but they support
|
|
dnl an equivalent flag:
|
|
dnl - Sun Studio compiler supports -errwarn=%all
|
|
AC_DEFUN([CC_CHECK_WERROR], [
|
|
AC_CACHE_CHECK(
|
|
[for $CC way to treat warnings as errors],
|
|
[cc_cv_werror],
|
|
[CC_CHECK_CFLAGS_SILENT([-Werror], [cc_cv_werror=-Werror],
|
|
[CC_CHECK_CFLAGS_SILENT([-errwarn=%all], [cc_cv_werror=-errwarn=%all])])
|
|
])
|
|
])
|
|
|
|
AC_DEFUN([CC_CHECK_ATTRIBUTE], [
|
|
AC_REQUIRE([CC_CHECK_WERROR])
|
|
AC_CACHE_CHECK([if $CC supports __attribute__(( ifelse([$2], , [$1], [$2]) ))],
|
|
AS_TR_SH([cc_cv_attribute_$1]),
|
|
[ac_save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $cc_cv_werror"
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([$3])],
|
|
[eval "AS_TR_SH([cc_cv_attribute_$1])='yes'"],
|
|
[eval "AS_TR_SH([cc_cv_attribute_$1])='no'"])
|
|
CFLAGS="$ac_save_CFLAGS"
|
|
])
|
|
|
|
AS_IF([eval test x$]AS_TR_SH([cc_cv_attribute_$1])[ = xyes],
|
|
[AC_DEFINE(
|
|
AS_TR_CPP([SUPPORT_ATTRIBUTE_$1]), 1,
|
|
[Define this if the compiler supports __attribute__(( ifelse([$2], , [$1], [$2]) ))]
|
|
)
|
|
$4],
|
|
[$5])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[constructor],,
|
|
[void __attribute__((constructor)) ctor() { int a; }],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_FORMAT], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[format], [format(printf, n, n)],
|
|
[void __attribute__((format(printf, 1, 2))) printflike(const char *fmt, ...) { fmt = (void *)0; }],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[format_arg], [format_arg(printf)],
|
|
[char *__attribute__((format_arg(1))) gettextlike(const char *fmt) { fmt = (void *)0; }],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[visibility_$1], [visibility("$1")],
|
|
[void __attribute__((visibility("$1"))) $1_function() { }],
|
|
[$2], [$3])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[nonnull], [nonnull()],
|
|
[void __attribute__((nonnull())) some_function(void *foo, void *bar) { foo = (void*)0; bar = (void*)0; }],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_UNUSED], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[unused], ,
|
|
[void some_function(void *foo, __attribute__((unused)) void *bar);],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[sentinel], ,
|
|
[void some_function(void *foo, ...) __attribute__((sentinel));],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[deprecated], ,
|
|
[void some_function(void *foo, ...) __attribute__((deprecated));],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_ALIAS], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[alias], [weak, alias],
|
|
[void other_function(void *foo) { }
|
|
void some_function(void *foo) __attribute__((weak, alias("other_function")));],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_MALLOC], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[malloc], ,
|
|
[void * __attribute__((malloc)) my_alloc(int n);],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_PACKED], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[packed], ,
|
|
[struct astructure { char a; int b; long c; void *d; } __attribute__((packed));],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_CONST], [
|
|
CC_CHECK_ATTRIBUTE(
|
|
[const], ,
|
|
[int __attribute__((const)) twopow(int n) { return 1 << n; } ],
|
|
[$1], [$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_FLAG_VISIBILITY], [
|
|
AC_REQUIRE([CC_CHECK_WERROR])
|
|
AC_CACHE_CHECK([if $CC supports -fvisibility=hidden],
|
|
[cc_cv_flag_visibility],
|
|
[cc_flag_visibility_save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $cc_cv_werror"
|
|
CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
|
|
cc_cv_flag_visibility='yes',
|
|
cc_cv_flag_visibility='no')
|
|
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
|
|
|
|
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
|
|
[AC_DEFINE([SUPPORT_FLAG_VISIBILITY], 1,
|
|
[Define this if the compiler supports the -fvisibility flag])
|
|
$1],
|
|
[$2])
|
|
])
|
|
|
|
AC_DEFUN([CC_CHECK_FUNC_BUILTIN], [
|
|
m4_pushdef([UPNAME], m4_translit([$1], [-a-z], [_A-Z]))
|
|
AC_CACHE_CHECK([if compiler has $1 builtin function],
|
|
[cc_cv_have_$1],
|
|
[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [
|
|
m4_case([$1],
|
|
[__builtin_clz], [$1(0)],
|
|
[__builtin_types_compatible_p], [$1(int, int)],
|
|
[__builtin_uaddl_overflow], [$1(0UL, 0UL, (void*)0)],
|
|
[__builtin_uaddll_overflow], [$1(0ULL, 0ULL, (void*)0)],
|
|
[__builtin_expect], [$1(0, 0)]
|
|
)])],
|
|
[cc_cv_have_$1=yes],
|
|
[cc_cv_have_$1=no])])
|
|
|
|
AS_IF([test "x$cc_cv_have_$1" = "xyes"],
|
|
[AC_DEFINE([HAVE_]m4_defn([UPNAME]), 1, [Define to 1 if compiler has $1() builtin function])
|
|
$2],
|
|
[AS_IF([test "x$3" = "x"], [AC_MSG_ERROR([*** builtin function not found: $1()])],
|
|
[AC_DEFINE([HAVE_]m4_defn([UPNAME]), 0)
|
|
$3])]
|
|
)
|
|
m4_popdef([UPNAME])
|
|
])
|
|
|
|
AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
|
|
AC_REQUIRE([CC_CHECK_WERROR])
|
|
AC_CACHE_CHECK([highest __attribute__ ((aligned ())) supported],
|
|
[cc_cv_attribute_aligned],
|
|
[ac_save_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $cc_cv_werror"
|
|
for cc_attribute_align_try in 64 32 16 8 4 2; do
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
|
|
int main() {
|
|
static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
|
|
return c;
|
|
}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
|
|
done
|
|
CFLAGS="$ac_save_CFLAGS"
|
|
])
|
|
|
|
if test "x$cc_cv_attribute_aligned" != "x"; then
|
|
AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX], [$cc_cv_attribute_aligned],
|
|
[Define the highest alignment supported])
|
|
fi
|
|
])
|