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      1 # glob_h.m4 serial 9
      2 dnl Copyright (C) 2018-2022 Free Software Foundation, Inc.
      3 dnl This file is free software; the Free Software Foundation
      4 dnl gives unlimited permission to copy and/or distribute it,
      5 dnl with or without modifications, as long as this notice is preserved.
      6 
      7 dnl From Bruno Haible.
      8 
      9 AC_DEFUN_ONCE([gl_GLOB_H],
     10 [
     11   AC_REQUIRE([gl_GLOB_H_DEFAULTS])
     12   m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])])
     13   AC_REQUIRE([AC_C_RESTRICT])
     14   AC_CHECK_HEADERS_ONCE([glob.h])
     15   gl_CHECK_NEXT_HEADERS([glob.h])
     16 
     17   if test $ac_cv_header_glob_h = yes; then
     18     HAVE_GLOB_H=1
     19   else
     20     HAVE_GLOB_H=0
     21   fi
     22   AC_SUBST([HAVE_GLOB_H])
     23 
     24   m4_ifdef([gl_POSIXCHECK],
     25     [GL_GENERATE_GLOB_H=true],
     26     [GL_GENERATE_GLOB_H=false
     27      if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then
     28        dnl Override <glob.h> always, to support the C++ GNULIB_NAMESPACE.
     29        GL_GENERATE_GLOB_H=true
     30      else
     31        if test $ac_cv_header_glob_h != yes; then
     32          dnl Provide a substitute <glob.h> file.
     33          GL_GENERATE_GLOB_H=true
     34        fi
     35      fi
     36     ])
     37 
     38   dnl Check for declarations of anything we want to poison if the
     39   dnl corresponding gnulib module is not in use.
     40   gl_WARN_ON_USE_PREPARE([[#include <glob.h>
     41     ]],
     42     [glob globfree glob_pattern_p])
     43 ])
     44 
     45 dnl Unconditionally enables the replacement of <glob.h>.
     46 AC_DEFUN([gl_REPLACE_GLOB_H],
     47 [
     48   gl_GLOB_H_REQUIRE_DEFAULTS
     49   GL_GENERATE_GLOB_H=true
     50 ])
     51 
     52 # gl_GLOB_MODULE_INDICATOR([modulename])
     53 # sets the shell variable that indicates the presence of the given module
     54 # to a C preprocessor expression that will evaluate to 1.
     55 # This macro invocation must not occur in macros that are AC_REQUIREd.
     56 AC_DEFUN([gl_GLOB_MODULE_INDICATOR],
     57 [
     58   dnl Ensure to expand the default settings once only.
     59   gl_GLOB_H_REQUIRE_DEFAULTS
     60   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
     61   dnl Define it also as a C macro, for the benefit of the unit tests.
     62   gl_MODULE_INDICATOR_FOR_TESTS([$1])
     63 ])
     64 
     65 # Initializes the default values for AC_SUBSTed shell variables.
     66 # This macro must not be AC_REQUIREd.  It must only be invoked, and only
     67 # outside of macros or in macros that are not AC_REQUIREd.
     68 AC_DEFUN([gl_GLOB_H_REQUIRE_DEFAULTS],
     69 [
     70   m4_defun(GL_MODULE_INDICATOR_PREFIX[_GLOB_H_MODULE_INDICATOR_DEFAULTS], [
     71     gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GLOB])
     72   ])
     73   m4_require(GL_MODULE_INDICATOR_PREFIX[_GLOB_H_MODULE_INDICATOR_DEFAULTS])
     74   AC_REQUIRE([gl_GLOB_H_DEFAULTS])
     75 ])
     76 
     77 AC_DEFUN([gl_GLOB_H_DEFAULTS],
     78 [
     79   dnl Assume POSIX and GNU behavior unless another module says otherwise.
     80   HAVE_GLOB=1;               AC_SUBST([HAVE_GLOB])
     81   HAVE_GLOB_PATTERN_P=1;     AC_SUBST([HAVE_GLOB_PATTERN_P])
     82   REPLACE_GLOB=0;            AC_SUBST([REPLACE_GLOB])
     83   REPLACE_GLOB_PATTERN_P=0;  AC_SUBST([REPLACE_GLOB_PATTERN_P])
     84 ])
     85