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-rw-r--r--m4/__inline.m422
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diff --git a/m4/__inline.m4 b/m4/__inline.m4
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+# Test for __inline keyword
+dnl Copyright 2017-2019 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl___INLINE],
+[
+ AC_CACHE_CHECK([whether the compiler supports the __inline keyword],
+ [gl_cv_c___inline],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[typedef int foo_t;
+ static __inline foo_t foo (void) { return 0; }]],
+ [[return foo ();]])],
+ [gl_cv_c___inline=yes],
+ [gl_cv_c___inline=no])])
+ if test $gl_cv_c___inline = yes; then
+ AC_DEFINE([HAVE___INLINE], [1],
+ [Define to 1 if the compiler supports the keyword '__inline'.])
+ fi
+])