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authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /gnulib-m4/inline.m4
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'gnulib-m4/inline.m4')
-rw-r--r--gnulib-m4/inline.m440
1 files changed, 40 insertions, 0 deletions
diff --git a/gnulib-m4/inline.m4 b/gnulib-m4/inline.m4
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+++ b/gnulib-m4/inline.m4
@@ -0,0 +1,40 @@
+# inline.m4 serial 4
+dnl Copyright (C) 2006, 2009 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
+])