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Diff for /embedaddon/libiconv/srcm4/gnulib-common.m4 between versions 1.1 and 1.1.1.3

version 1.1, 2012/02/21 22:57:49 version 1.1.1.3, 2021/03/17 13:38:46
Line 1 Line 1
# gnulib-common.m4 serial 11# gnulib-common.m4 serial 44
dnl Copyright (C) 2007-2009 Free Software Foundation, Inc.dnl Copyright (C) 2007-2019 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation  dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,  dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.  dnl with or without modifications, as long as this notice is preserved.
   
   AC_PREREQ([2.62])
   
 # gl_COMMON  # gl_COMMON
 # is expanded unconditionally through gnulib-tool magic.  # is expanded unconditionally through gnulib-tool magic.
 AC_DEFUN([gl_COMMON], [  AC_DEFUN([gl_COMMON], [
Line 12  AC_DEFUN([gl_COMMON], [ Line 14  AC_DEFUN([gl_COMMON], [
   AC_REQUIRE([gl_COMMON_BODY])    AC_REQUIRE([gl_COMMON_BODY])
 ])  ])
 AC_DEFUN([gl_COMMON_BODY], [  AC_DEFUN([gl_COMMON_BODY], [
     AH_VERBATIM([_Noreturn],
   [/* The _Noreturn keyword of C11.  */
   #ifndef _Noreturn
   # if (defined __cplusplus \
         && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
             || (defined _MSC_VER && 1900 <= _MSC_VER)))
   #  define _Noreturn [[noreturn]]
   # elif ((!defined __cplusplus || defined __clang__) \
           && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0)  \
               || 4 < __GNUC__ + (7 <= __GNUC_MINOR__)))
      /* _Noreturn works as-is.  */
   # elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C
   #  define _Noreturn __attribute__ ((__noreturn__))
   # elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
   #  define _Noreturn __declspec (noreturn)
   # else
   #  define _Noreturn
   # endif
   #endif
   ])
   AH_VERBATIM([isoc99_inline],    AH_VERBATIM([isoc99_inline],
 [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports  [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
    the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of     the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
    earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.     earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
   __APPLE__ && __MACH__ test for MacOS X.   __APPLE__ && __MACH__ test for Mac OS X.
    __APPLE_CC__ tests for the Apple compiler and its version.     __APPLE_CC__ tests for the Apple compiler and its version.
    __STDC_VERSION__ tests for the C99 mode.  */     __STDC_VERSION__ tests for the C99 mode.  */
 #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__  #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
 # define __GNUC_STDC_INLINE__ 1  # define __GNUC_STDC_INLINE__ 1
 #endif])  #endif])
   AH_VERBATIM([unused_parameter],    AH_VERBATIM([unused_parameter],
[/* Define as a marker that can be attached to function parameter declarations[/* Define as a marker that can be attached to declarations that might not
   for parameters that are not used.  This helps to reduce warnings, such as    be used.  This helps to reduce warnings, such as from
   from GCC -Wunused-parameter.  */    GCC -Wunused-parameter.  */
 #if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)  #if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
# define _UNUSED_PARAMETER_ __attribute__ ((__unused__))# define _GL_UNUSED __attribute__ ((__unused__))
 #else  #else
# define _UNUSED_PARAMETER_# define _GL_UNUSED
 #endif  #endif
   /* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
      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__))
   #else
   # define _GL_ATTRIBUTE_PURE /* empty */
   #endif
   
   /* The __const__ attribute was added in gcc 2.95.  */
   #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
   # define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
   #else
   # define _GL_ATTRIBUTE_CONST /* empty */
   #endif
   
   /* The __malloc__ attribute was added in gcc 3.  */
   #if 3 <= __GNUC__
   # define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
   #else
   # define _GL_ATTRIBUTE_MALLOC /* empty */
   #endif
 ])  ])
     AH_VERBATIM([async_safe],
   [/* The _GL_ASYNC_SAFE marker should be attached to functions that are
      signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
      invoked from such signal handlers.  Such functions have some restrictions:
        * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
          or should be listed as async-signal-safe in POSIX
          <http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
          section 2.4.3.  Note that malloc(), sprintf(), and fwrite(), in
          particular, are NOT async-signal-safe.
        * All memory locations (variables and struct fields) that these functions
          access must be marked 'volatile'.  This holds for both read and write
          accesses.  Otherwise the compiler might optimize away stores to and
          reads from such locations that occur in the program, depending on its
          data flow analysis.  For example, when the program contains a loop
          that is intended to inspect a variable set from within a signal handler
              while (!signal_occurred)
                ;
          the compiler is allowed to transform this into an endless loop if the
          variable 'signal_occurred' is not declared 'volatile'.
      Additionally, recall that:
        * A signal handler should not modify errno (except if it is a handler
          for a fatal signal and ends by raising the same signal again, thus
          provoking the termination of the process).  If it invokes a function
          that may clobber errno, it needs to save and restore the value of
          errno.  */
   #define _GL_ASYNC_SAFE
 ])  ])
     dnl Preparation for running test programs:
     dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
     dnl to /dev/tty, so they can be redirected to log files.  Such diagnostics
     dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
     LIBC_FATAL_STDERR_=1
     export LIBC_FATAL_STDERR_
   ])
   
   # gl_MODULE_INDICATOR_CONDITION
   # expands to a C preprocessor expression that evaluates to 1 or 0, depending
   # whether a gnulib module that has been requested shall be considered present
   # or not.
   m4_define([gl_MODULE_INDICATOR_CONDITION], [1])
   
   # gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
   # sets the shell variable that indicates the presence of the given module to
   # a C preprocessor expression that will evaluate to 1.
   AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
   [
     gl_MODULE_INDICATOR_SET_VARIABLE_AUX(
       [GNULIB_[]m4_translit([[$1]],
                             [abcdefghijklmnopqrstuvwxyz./-],
                             [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])],
       [gl_MODULE_INDICATOR_CONDITION])
   ])
   
   # gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable])
   # modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION.
   # The shell variable's value is a C preprocessor expression that evaluates
   # to 0 or 1.
   AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX],
   [
     m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1],
       [
        dnl Simplify the expression VALUE || 1 to 1.
        $1=1
       ],
       [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1],
                                                [gl_MODULE_INDICATOR_CONDITION])])
   ])
   
   # gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition])
   # modifies the shell variable to include the given condition.  The shell
   # variable's value is a C preprocessor expression that evaluates to 0 or 1.
   AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR],
   [
     dnl Simplify the expression 1 || CONDITION to 1.
     if test "$[]$1" != 1; then
       dnl Simplify the expression 0 || CONDITION to CONDITION.
       if test "$[]$1" = 0; then
         $1=$2
       else
         $1="($[]$1 || $2)"
       fi
     fi
   ])
   
 # gl_MODULE_INDICATOR([modulename])  # gl_MODULE_INDICATOR([modulename])
# defines a C macro indicating the presence of the given module.# defines a C macro indicating the presence of the given module
 # in a location where it can be used.
 #                                             |  Value  |   Value   |
 #                                             | in lib/ | in tests/ |
 # --------------------------------------------+---------+-----------+
 # Module present among main modules:          |    1    |     1     |
 # --------------------------------------------+---------+-----------+
 # Module present among tests-related modules: |    0    |     1     |
 # --------------------------------------------+---------+-----------+
 # Module not present at all:                  |    0    |     0     |
 # --------------------------------------------+---------+-----------+
 AC_DEFUN([gl_MODULE_INDICATOR],  AC_DEFUN([gl_MODULE_INDICATOR],
 [  [
  AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],  AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
    [Define to 1 when using the gnulib module ]$1[.])      [abcdefghijklmnopqrstuvwxyz./-],
       [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
     [gl_MODULE_INDICATOR_CONDITION],
     [Define to a C preprocessor expression that evaluates to 1 or 0,
      depending whether the gnulib module $1 shall be considered present.])
 ])  ])
   
# m4_foreach_w# gl_MODULE_INDICATOR_FOR_TESTS([modulename])
# is a backport of autoconf-2.59c's m4_foreach_w.# defines a C macro indicating the presence of the given module
# Remove this macro when we can assume autoconf >= 2.60.# in lib or tests. This is useful to determine whether the module
m4_ifndef([m4_foreach_w],# should be tested.
  [m4_define([m4_foreach_w],#                                             |  Value  |   Value   |
    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])#                                             | in lib/ | in tests/ |
 # --------------------------------------------+---------+-----------+
 # Module present among main modules:          |    1    |     1     |
 # --------------------------------------------+---------+-----------+
 # Module present among tests-related modules: |    1    |     1     |
 # --------------------------------------------+---------+-----------+
 # Module not present at all:                  |    0    |     0     |
 # --------------------------------------------+---------+-----------+
 AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
 [
   AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
       [abcdefghijklmnopqrstuvwxyz./-],
       [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
     [Define to 1 when the gnulib module $1 should be tested.])
 ])
   
# AC_PROG_MKDIR_P# gl_ASSERT_NO_GNULIB_POSIXCHECK
# is a backport of autoconf-2.60's AC_PROG_MKDIR_P.# asserts that there will never be a need to #define GNULIB_POSIXCHECK.
# Remove this macro when we can assume autoconf >= 2.60.# and thereby enables an optimization of configure and config.h.
m4_ifdef([AC_PROG_MKDIR_P], [], [# Used by Emacs.
  AC_DEFUN_ONCE([AC_PROG_MKDIR_P],AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
    [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake[
     MKDIR_P='$(mkdir_p)'  dnl Override gl_WARN_ON_USE_PREPARE.
     AC_SUBST([MKDIR_P])])])  dnl But hide this definition from 'aclocal'.
   AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
 ])
   
   # gl_ASSERT_NO_GNULIB_TESTS
   # asserts that there will be no gnulib tests in the scope of the configure.ac
   # and thereby enables an optimization of config.h.
   # Used by Emacs.
   AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
   [
     dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
     AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
   ])
   
   # Test whether <features.h> exists.
   # Set HAVE_FEATURES_H.
   AC_DEFUN([gl_FEATURES_H],
   [
     AC_CHECK_HEADERS_ONCE([features.h])
     if test $ac_cv_header_features_h = yes; then
       HAVE_FEATURES_H=1
     else
       HAVE_FEATURES_H=0
     fi
     AC_SUBST([HAVE_FEATURES_H])
   ])
   
   # AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
   # ----------------------------------------------------
   # Backport of autoconf-2.63b's macro.
   # Remove this macro when we can assume autoconf >= 2.64.
   m4_ifndef([AS_VAR_IF],
   [m4_define([AS_VAR_IF],
   [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
   
   # gl_PROG_CC_C99
   # Modifies the value of the shell variable CC in an attempt to make $CC
   # understand ISO C99 source code.
   # This is like AC_PROG_CC_C99, except that
   # - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
   #   <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00367.html>,
   #   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
   #   <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00441.html>.
   # Remaining problems:
   # - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
   #   to CC twice
   #   <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00431.html>.
   # - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard.
   AC_DEFUN([gl_PROG_CC_C99],
   [
     dnl Change that version number to the minimum Autoconf version that supports
     dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls.
     m4_version_prereq([9.0],
       [AC_REQUIRE([AC_PROG_CC_C99])],
       [AC_REQUIRE([AC_PROG_CC_STDC])])
   ])
   
   # gl_PROG_AR_RANLIB
   # Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
   # The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
   # the values.
   AC_DEFUN([gl_PROG_AR_RANLIB],
   [
     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 and ranlib
     dnl produce libraries that work only with gcc, not with cc.
     AC_REQUIRE([AC_PROG_CC])
     dnl The '][' hides this use from 'aclocal'.
     AC_BEFORE([$0], [A][M_PROG_AR])
     AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
       [
         AC_EGREP_CPP([Amsterdam],
           [
   #ifdef __ACK__
   Amsterdam
   #endif
           ],
           [gl_cv_c_amsterdam_compiler=yes],
           [gl_cv_c_amsterdam_compiler=no])
       ])
   
     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'
       fi
       if test -z "$ARFLAGS"; then
         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).
       dnl
       dnl The '][' hides this use from 'aclocal'.
       m4_ifdef([A][M_PROG_AR], [A][M_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
       if test $gl_cv_c_amsterdam_compiler = yes; then
         RANLIB=':'
       else
         dnl Use the ranlib program if it is available.
         AC_PROG_RANLIB
       fi
     fi
     AC_SUBST([RANLIB])
   ])
   
 # AC_C_RESTRICT  # AC_C_RESTRICT
# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,# This definition is copied from post-2.69 Autoconf and overrides the
# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++# AC_C_RESTRICT macro from autoconf 2.60..2.69.  It can be removed
# works.# once autoconf >= 2.70 can be assumed.  It's painful to check version
# This definition can be removed once autoconf >= 2.62 can be assumed.# numbers, and in practice this macro is more up-to-date than Autoconf
 # is, so override Autoconf unconditionally.
 AC_DEFUN([AC_C_RESTRICT],  AC_DEFUN([AC_C_RESTRICT],
 [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],  [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
   [ac_cv_c_restrict=no    [ac_cv_c_restrict=no
    # The order here caters to the fact that C++ does not require restrict.     # The order here caters to the fact that C++ does not require restrict.
    for ac_kw in __restrict __restrict__ _Restrict restrict; do     for ac_kw in __restrict __restrict__ _Restrict restrict; do
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(     AC_COMPILE_IFELSE(
      [[typedef int * int_ptr;      [AC_LANG_PROGRAM(
        int foo (int_ptr $ac_kw ip) {         [[typedef int *int_ptr;
        return ip[0];           int foo (int_ptr $ac_kw ip) { return ip[0]; }
       }]],           int bar (int [$ac_kw]); /* Catch GCC bug 14050.  */
      [[int s[1];           int bar (int ip[$ac_kw]) { return ip[0]; }
        int * $ac_kw t = s;         ]],
        t[0] = 0;         [[int s[1];
        return foo(t)]])],           int *$ac_kw t = s;
            t[0] = 0;
            return foo (t) + bar (t);
          ]])],
       [ac_cv_c_restrict=$ac_kw])        [ac_cv_c_restrict=$ac_kw])
      test "$ac_cv_c_restrict" != no && break       test "$ac_cv_c_restrict" != no && break
    done     done
Line 86  AC_DEFUN([AC_C_RESTRICT], Line 381  AC_DEFUN([AC_C_RESTRICT],
    nothing if this is not supported.  Do not define if restrict is     nothing if this is not supported.  Do not define if restrict is
    supported directly.  */     supported directly.  */
 #undef restrict  #undef restrict
/* Work around a bug in Sun C++: it does not support _Restrict, even/* Work around a bug in Sun C++: it does not support _Restrict or
   though the corresponding Sun C compiler does, which causes   __restrict__, even though the corresponding Sun C compiler ends up with
   "#define restrict _Restrict" in the previous line.  Perhaps some future   "#define restrict _Restrict" or "#define restrict __restrict__" in the
   version of Sun C++ will work with _Restrict; if so, it'll probably   previous line.  Perhaps some future version of Sun C++ will work with
   define __RESTRICT, just as Sun C does.  */   restrict; if so, hopefully it defines __RESTRICT like Sun C does.  */
 #if defined __SUNPRO_CC && !defined __RESTRICT  #if defined __SUNPRO_CC && !defined __RESTRICT
 # define _Restrict  # define _Restrict
   # define __restrict__
 #endif])  #endif])
  case $ac_cv_c_restrict in   case $ac_cv_c_restrict in
    restrict) ;;     restrict) ;;
    no) AC_DEFINE([restrict], []) ;;     no) AC_DEFINE([restrict], []) ;;
    *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;     *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
  esac   esac
])])# AC_C_RESTRICT
   
 # gl_BIGENDIAN  # gl_BIGENDIAN
 # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.  # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
Line 122  AC_DEFUN([gl_CACHE_VAL_SILENT], Line 418  AC_DEFUN([gl_CACHE_VAL_SILENT],
   AC_CACHE_VAL([$1], [$2])    AC_CACHE_VAL([$1], [$2])
   as_echo_n="$saved_as_echo_n"    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])])
Removed from v.1.1  
changed lines
  Added in v.1.1.1.3

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