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Diffstat (limited to 'm4/restrict.m4')
| -rw-r--r-- | m4/restrict.m4 | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/m4/restrict.m4 b/m4/restrict.m4 deleted file mode 100644 index 1f3bbb92..00000000 --- a/m4/restrict.m4 +++ /dev/null @@ -1,38 +0,0 @@ -#serial 1003 -dnl Copyright (C) 2003 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. - -# This macro can be removed once we can rely on Autoconf 2.57a or later, -# since we can then use its AC_C_RESTRICT. - -# gl_C_RESTRICT -# -------------- -# Determine whether the C/C++ compiler supports the "restrict" keyword -# introduced in ANSI C99, or an equivalent. Do nothing if the compiler -# accepts it. Otherwise, if the compiler supports an equivalent, -# define "restrict" to be that. Here are some variants: -# - GCC supports both __restrict and __restrict__ -# - older DEC Alpha C compilers support only __restrict -# - _Restrict is the only spelling accepted by Sun WorkShop 6 update 2 C -# Otherwise, define "restrict" to be empty. -AC_DEFUN([gl_C_RESTRICT], -[AC_CACHE_CHECK([for C/C++ restrict keyword], gl_cv_c_restrict, - [gl_cv_c_restrict=no - # Try the official restrict keyword, then gcc's __restrict, and - # the less common variants. - for ac_kw in restrict __restrict __restrict__ _Restrict; do - AC_COMPILE_IFELSE([AC_LANG_SOURCE( - [float * $ac_kw x;])], - [gl_cv_c_restrict=$ac_kw; break]) - done - ]) - case $gl_cv_c_restrict in - restrict) ;; - no) AC_DEFINE(restrict,, - [Define to equivalent of C99 restrict keyword, or to nothing if this - is not supported. Do not define if restrict is supported directly.]) ;; - *) AC_DEFINE_UNQUOTED(restrict, $gl_cv_c_restrict) ;; - esac -]) |