mirror of https://github.com/MidnightCommander/mc
buildsys: update ax_gcc_func_attribute to fix fallthrough detection
Signed-off-by: Yury V. Zaytsev <yury@shurup.com> Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
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40867e5740
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87bdeeb591
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@ -42,6 +42,7 @@
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# flatten
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# flatten
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# format
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# format
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# format_arg
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# format_arg
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# gnu_format
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# gnu_inline
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# gnu_inline
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# hot
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# hot
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# ifunc
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# ifunc
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@ -77,7 +78,7 @@
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# and this notice are preserved. This file is offered as-is, without any
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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# warranty.
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#serial 9
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#serial 13
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AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
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AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
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AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1])
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AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1])
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@ -132,7 +133,7 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
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int foo( void ) __attribute__(($1));
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int foo( void ) __attribute__(($1));
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],
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],
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[fallthrough], [
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[fallthrough], [
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int foo( void ) {switch (0) { case 1: __attribute__(($1)); case 2: break ; }};
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void foo( int x ) {switch (x) { case 1: __attribute__(($1)); case 2: break ; }};
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],
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],
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[flatten], [
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[flatten], [
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int foo( void ) __attribute__(($1));
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int foo( void ) __attribute__(($1));
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@ -140,6 +141,9 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
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[format], [
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[format], [
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int foo(const char *p, ...) __attribute__(($1(printf, 1, 2)));
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int foo(const char *p, ...) __attribute__(($1(printf, 1, 2)));
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],
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],
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[gnu_format], [
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int foo(const char *p, ...) __attribute__((format(gnu_printf, 1, 2)));
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],
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[format_arg], [
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[format_arg], [
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char *foo(const char *p) __attribute__(($1(1)));
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char *foo(const char *p) __attribute__(($1(1)));
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],
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],
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@ -224,7 +228,7 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
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dnl GCC doesn't exit with an error if an unknown attribute is
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dnl GCC doesn't exit with an error if an unknown attribute is
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dnl provided but only outputs a warning, so accept the attribute
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dnl provided but only outputs a warning, so accept the attribute
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dnl only if no warning were issued.
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dnl only if no warning were issued.
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[AS_IF([test -s conftest.err],
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[AS_IF([grep -- -Wattributes conftest.err],
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[AS_VAR_SET([ac_var], [no])],
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[AS_VAR_SET([ac_var], [no])],
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[AS_VAR_SET([ac_var], [yes])])],
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[AS_VAR_SET([ac_var], [yes])])],
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[AS_VAR_SET([ac_var], [no])])
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[AS_VAR_SET([ac_var], [no])])
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