-# gnulib-common.m4 serial 33
-dnl Copyright (C) 2007-2013 Free Software Foundation, Inc.
+# gnulib-common.m4 serial 36
+dnl Copyright (C) 2007-2016 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.
is a misnomer outside of parameter lists. */
#define _UNUSED_PARAMETER_ _GL_UNUSED
+/* gcc supports the "unused" attribute on possibly unused labels, and
+ g++ has since version 4.5. Note to support C++ as well as C,
+ _GL_UNUSED_LABEL should be used with a trailing ; */
+#if !defined __cplusplus || __GNUC__ > 4 \
+ || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+# define _GL_UNUSED_LABEL _GL_UNUSED
+#else
+# define _GL_UNUSED_LABEL
+#endif
+
/* The __pure__ attribute was added in gcc 2.96. */
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
[
dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
dnl as "cc", and GCC as "gcc". They have different object file formats and
- dnl library formats. In particular, the GNU binutils programs ar, ranlib
+ dnl library formats. In particular, the GNU binutils programs ar and ranlib
dnl produce libraries that work only with gcc, not with cc.
AC_REQUIRE([AC_PROG_CC])
+ AC_BEFORE([$0], [AM_PROG_AR])
AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
[
AC_EGREP_CPP([Amsterdam],
[gl_cv_c_amsterdam_compiler=yes],
[gl_cv_c_amsterdam_compiler=no])
])
- if test -z "$AR"; then
- if test $gl_cv_c_amsterdam_compiler = yes; then
+
+ dnl Don't compete with AM_PROG_AR's decision about AR/ARFLAGS if we are not
+ dnl building with __ACK__.
+ if test $gl_cv_c_amsterdam_compiler = yes; then
+ if test -z "$AR"; then
AR='cc -c.a'
- if test -z "$ARFLAGS"; then
- ARFLAGS='-o'
- fi
- else
- dnl Use the Automake-documented default values for AR and ARFLAGS,
- dnl but prefer ${host}-ar over ar (useful for cross-compiling).
- AC_CHECK_TOOL([AR], [ar], [ar])
- if test -z "$ARFLAGS"; then
- ARFLAGS='cru'
- fi
fi
- else
if test -z "$ARFLAGS"; then
- ARFLAGS='cru'
+ ARFLAGS='-o'
fi
+ else
+ dnl AM_PROG_AR was added in automake v1.11.2. AM_PROG_AR does not AC_SUBST
+ dnl ARFLAGS variable (it is filed into Makefile.in directly by automake
+ dnl script on-demand, if not specified by ./configure of course).
+ dnl Don't AC_REQUIRE the AM_PROG_AR otherwise the code for __ACK__ above
+ dnl will be ignored. Also, pay attention to call AM_PROG_AR in else block
+ dnl because AM_PROG_AR is written so it could re-set AR variable even for
+ dnl __ACK__. It may seem like its easier to avoid calling the macro here,
+ dnl but we need to AC_SUBST both AR/ARFLAGS (thus those must have some good
+ dnl default value and automake should usually know them).
+ m4_ifdef([AM_PROG_AR], [AM_PROG_AR], [:])
fi
+
+ dnl In case the code above has not helped with setting AR/ARFLAGS, use
+ dnl Automake-documented default values for AR and ARFLAGS, but prefer
+ dnl ${host}-ar over ar (useful for cross-compiling).
+ AC_CHECK_TOOL([AR], [ar], [ar])
+ if test -z "$ARFLAGS"; then
+ ARFLAGS='cr'
+ fi
+
AC_SUBST([AR])
AC_SUBST([ARFLAGS])
if test -z "$RANLIB"; then
])
# AC_C_RESTRICT
-# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
-# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
-# works.
-# This definition can be removed once autoconf >= 2.62 can be assumed.
-# AC_AUTOCONF_VERSION was introduced in 2.62, so use that as the witness.
-m4_ifndef([AC_AUTOCONF_VERSION],[
+# This definition is copied from post-2.69 Autoconf and overrides the
+# AC_C_RESTRICT macro from autoconf 2.60..2.69. It can be removed
+# once autoconf >= 2.70 can be assumed. It's painful to check version
+# numbers, and in practice this macro is more up-to-date than Autoconf
+# is, so override Autoconf unconditionally.
AC_DEFUN([AC_C_RESTRICT],
[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
[ac_cv_c_restrict=no
# The order here caters to the fact that C++ does not require restrict.
for ac_kw in __restrict __restrict__ _Restrict restrict; do
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
- [[typedef int * int_ptr;
- int foo (int_ptr $ac_kw ip) {
- return ip[0];
- }]],
- [[int s[1];
- int * $ac_kw t = s;
- t[0] = 0;
- return foo(t)]])],
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[typedef int *int_ptr;
+ int foo (int_ptr $ac_kw ip) { return ip[0]; }
+ int bar (int [$ac_kw]); /* Catch GCC bug 14050. */
+ int bar (int ip[$ac_kw]) { return ip[0]; }
+ ]],
+ [[int s[1];
+ int *$ac_kw t = s;
+ t[0] = 0;
+ return foo (t) + bar (t);
+ ]])],
[ac_cv_c_restrict=$ac_kw])
test "$ac_cv_c_restrict" != no && break
done
nothing if this is not supported. Do not define if restrict is
supported directly. */
#undef restrict
-/* Work around a bug in Sun C++: it does not support _Restrict, even
- though the corresponding Sun C compiler does, which causes
- "#define restrict _Restrict" in the previous line. Perhaps some future
- version of Sun C++ will work with _Restrict; if so, it'll probably
- define __RESTRICT, just as Sun C does. */
+/* Work around a bug in Sun C++: it does not support _Restrict or
+ __restrict__, even though the corresponding Sun C compiler ends up with
+ "#define restrict _Restrict" or "#define restrict __restrict__" in the
+ previous line. Perhaps some future version of Sun C++ will work with
+ restrict; if so, hopefully it defines __RESTRICT like Sun C does. */
#if defined __SUNPRO_CC && !defined __RESTRICT
# define _Restrict
+# define __restrict__
#endif])
case $ac_cv_c_restrict in
restrict) ;;
no) AC_DEFINE([restrict], []) ;;
*) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
esac
-])
-])
+])# AC_C_RESTRICT
# gl_BIGENDIAN
# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
AC_CACHE_VAL([$1], [$2])
as_echo_n="$saved_as_echo_n"
])
+
+# AS_VAR_COPY was added in autoconf 2.63b
+m4_define_default([AS_VAR_COPY],
+[AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])
+
+# AC_PROG_SED was added in autoconf 2.59b
+m4_ifndef([AC_PROG_SED],
+[AC_DEFUN([AC_PROG_SED],
+[AC_CACHE_CHECK([for a sed that does not truncate output], ac_cv_path_SED,
+ [dnl ac_script should not contain more than 99 commands (for HP-UX sed),
+ dnl but more than about 7000 bytes, to catch a limit in Solaris 8 /usr/ucb/sed.
+ ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+ for ac_i in 1 2 3 4 5 6 7; do
+ ac_script="$ac_script$as_nl$ac_script"
+ done
+ echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+ AS_UNSET([ac_script])
+ if test -z "$SED"; then
+ ac_path_SED_found=false
+ _AS_PATH_WALK([], [
+ for ac_prog in sed gsed; do
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+ AS_EXECUTABLE_P(["$ac_path_SED"]) || continue
+ case `"$ac_path_SED" --version 2>&1` in
+ *GNU*) ac_cv_path_SED=$ac_path_SED ac_path_SED_found=:;;
+ *)
+ ac_count=0
+ _AS_ECHO_N([0123456789]) >conftest.in
+ while :
+ do
+ cat conftest.in conftest.in >conftest.tmp
+ mv conftest.tmp conftest.in
+ cp conftest.in conftest.nl
+ echo >> conftest.nl
+ "$ac_path_SED" -f conftest.sed <conftest.nl >conftest.out 2>/dev/null || break
+ diff conftest.out conftest.nl >/dev/null 2>&1 || break
+ ac_count=`expr $ac_count + 1`
+ if test $ac_count -gt ${ac_path_SED_max-0}; then
+ # Best so far, but keep looking for better
+ ac_cv_path_SED=$ac_path_SED
+ ac_path_SED_max=$ac_count
+ fi
+ test $ac_count -gt 10 && break
+ done
+ rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
+ esac
+ $ac_path_SED_found && break 3
+ done
+ done])
+ if test -z "$ac_cv_path_SED"; then
+ AC_ERROR([no acceptable sed could be found in \$PATH])
+ fi
+ else
+ ac_cv_path_SED=$SED
+ fi
+ SED="$ac_cv_path_SED"
+ AC_SUBST([SED])dnl
+ rm -f conftest.sed
+])])])
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