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diff --git a/m4/inline.m4 b/m4/inline.m4
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-# inline.m4 serial 4
-dnl Copyright (C) 2006, 2009-2011 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.
-
-dnl Test for the 'inline' keyword or equivalent.
-dnl Define 'inline' to a supported equivalent, or to nothing if not supported,
-dnl like AC_C_INLINE does. Also, define HAVE_INLINE if 'inline' or an
-dnl equivalent is effectively supported, i.e. if the compiler is likely to
-dnl drop unused 'static inline' functions.
-AC_DEFUN([gl_INLINE],
-[
- AC_REQUIRE([AC_C_INLINE])
- AC_CACHE_CHECK([whether the compiler generally respects inline],
- [gl_cv_c_inline_effective],
- [if test $ac_cv_c_inline = no; then
- gl_cv_c_inline_effective=no
- else
- dnl GCC defines __NO_INLINE__ if not optimizing or if -fno-inline is
- dnl specified.
- dnl Use AC_COMPILE_IFELSE here, not AC_EGREP_CPP, because the result
- dnl depends on optimization flags, which can be in CFLAGS.
- dnl (AC_EGREP_CPP looks only at the CPPFLAGS.)
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([[]],
- [[#ifdef __NO_INLINE__
- #error "inline is not effective"
- #endif]])],
- [gl_cv_c_inline_effective=yes],
- [gl_cv_c_inline_effective=no])
- fi
- ])
- if test $gl_cv_c_inline_effective = yes; then
- AC_DEFINE([HAVE_INLINE], [1],
- [Define to 1 if the compiler supports one of the keywords
- 'inline', '__inline__', '__inline' and effectively inlines
- functions marked as such.])
- fi
-])