acinclude.m4

   1 dnl ===========================================================================
   2 dnl Additional macros used to configure GiNaC.  We don't start our own
   3 dnl additions' names with AC_ but with GINAC_ in order to steer clear of
   4 dnl future trouble.
   5 dnl ===========================================================================
   6
   7 dnl  GINAC_HEADER_GETVAL(NAME,FILE)
   8 dnl  ----------------------------
   9 dnl  Expand at autoconf time to the value of a "#define NAME" from the given
  10 dnl  FILE. The regexps here aren't very rugged, but are enough for us.
  11 dnl  /dev/null as a parameter prevents a hang if $2 is accidentally omitted.
  12 dnl  (shamelessly ripped from GMP, and changed prefix to GINAC_).
  13
  14 define(GINAC_HEADER_GETVAL,
  15 [patsubst(patsubst(
  16 esyscmd([grep "^#define $1 " $2 /dev/null 2>/dev/null]),
  17 [^.*$1[         ]+],[]),
  18 [[
  19         ]*$],[])])
  20 define(GINAC_GET_VERSION,
  21 [GINAC_HEADER_GETVAL(GINACLIB_$1_VERSION,[ginac/version.h])])
  22 define(GINAC_GET_LTVERSION,
  23 [GINAC_HEADER_GETVAL(GINAC_LT_$1,[ginac/version.h])])
  24
  25 dnl Usage: GINAC_STD_CXX_HEADERS
  26 dnl Check for standard C++ headers, bail out if something is missing.
  27 AC_DEFUN([GINAC_STD_CXX_HEADERS], [
  28 AC_CACHE_CHECK([for standard C++ header files], [ginac_cv_std_cxx_headers], [
  29         ginac_cv_std_cxx_headers="no"
  30         AC_LANG_PUSH([C++])
  31         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  32                 #include <algorithm>
  33                 #include <cstring>
  34                 #include <cstddef>
  35                 #include <ctime>
  36                 #include <fstream>
  37                 #include <functional>
  38                 #include <iomanip>
  39                 #include <ios>
  40                 #include <iosfwd>
  41                 #include <iostream>
  42                 #include <iterator>
  43                 #include <limits>
  44                 #include <list>
  45                 #include <map>
  46                 #include <memory>
  47                 #include <numeric>
  48                 #include <ostream>
  49                 #include <set>
  50                 #include <sstream>
  51                 #include <stack>
  52                 #include <stdexcept>
  53                 #include <string>
  54                 #include <typeinfo>
  55                 #include <utility>
  56                 #include <vector>
  57                 ]])], [ginac_cv_std_cxx_headers="yes"])
  58         AC_LANG_POP([C++])])
  59 if test "${ginac_cv_std_cxx_headers}" != "yes"; then
  60         AC_MSG_ERROR([Standard ISO C++ headers are missing])
  61 fi
  62 ])
  63
  64 dnl Usage: GINAC_LIBREADLINE
  65 dnl
  66 dnl Check if GNU readline library and headers are avialable.
  67 dnl Defines GINSH_LIBS variable, and HAVE_LIBREADLINE,
  68 dnl HAVE_READLINE_READLINE_H, HAVE_READLINE_HISTORY_H preprocessor macros.
  69 dnl
  70 dnl Note: this macro rejects readline versions <= 4.2 and non-GNU
  71 dnl implementations.
  72 dnl
  73 AC_DEFUN([GINAC_READLINE],[
  74 AC_REQUIRE([GINAC_TERMCAP])
  75 GINSH_LIBS=""
  76 AC_CHECK_HEADERS(readline/readline.h readline/history.h)
  77 if test "x${ac_cv_header_readline_readline_h}" != "xyes" -o "x${ac_cv_header_readline_history_h}" != "xyes"; then
  78         GINAC_WARNING([ginsh will not compile, because readline headers could not be found.])
  79 else
  80         AC_CACHE_CHECK([for version of libreadline], [ginac_cv_rl_supported], [
  81                 ginac_cv_rl_supported="no"
  82                 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  83                         #include <stdio.h>
  84                         #include <readline/readline.h>
  85                         #if !defined(RL_VERSION_MAJOR) || !defined(RL_VERSION_MINOR)
  86                         #error "Ancient/unsupported version of readline"
  87                         #endif]])],
  88                         [ginac_cv_rl_supported="yes"])])
  89         if test "x${ginac_cv_rl_supported}" != "xyes"; then
  90                 GINAC_WARNING([ginsh will not compile, because of an unsupported version of readline (<= 4.2 or non-GNU).])
  91         else
  92                 save_LIBS="$LIBS"
  93                 LIBS="$LIBTERMCAP $LIBS"
  94                 AC_CHECK_LIB(readline, readline)
  95                 if test "x${ac_cv_lib_readline_readline}" != "xyes"; then
  96                         GINAC_WARNING([ginsh will not compile, because libreadline could not be found.])
  97                 fi
  98                 GINSH_LIBS="$LIBS"
  99                 LIBS="$save_LIBS"
 100         fi
 101 fi
 102 AC_SUBST(GINSH_LIBS)])
 103
 104 dnl Usage: GINAC_TERMCAP
 105 dnl libreadline is based on the termcap functions.
 106 dnl Some systems have tgetent(), tgetnum(), tgetstr(), tgetflag(), tputs(),
 107 dnl tgoto() in libc, some have it in libtermcap, some have it in libncurses.
 108 dnl When both libtermcap and libncurses exist, we prefer the latter, because
 109 dnl libtermcap is being phased out.
 110 AC_DEFUN([GINAC_TERMCAP],
 111 [LIBTERMCAP=
 112 case $host_os in
 113 *mingw32*)
 114  ;; dnl no termcap libraries are necessary (need hacked libreadline)
 115 *)
 116 AC_CHECK_FUNCS(tgetent)
 117 if test "x$ac_cv_func_tgetent" = "xyes"; then
 118     :
 119 else
 120     AC_CHECK_LIB(ncurses, tgetent, LIBTERMCAP="-lncurses")
 121     if test -z "$LIBTERMCAP"; then
 122         AC_CHECK_LIB(termcap, tgetent, LIBTERMCAP="-ltermcap")
 123     fi
 124 fi
 125 ;;
 126 esac
 127 AC_SUBST(LIBTERMCAP)
 128 ])
 129
 130 dnl Usage: GINAC_ERROR(message)
 131 dnl This macro displays the warning "message" and sets the flag ginac_error
 132 dnl to yes.
 133 AC_DEFUN([GINAC_ERROR],[
 134 ginac_error_txt="$ginac_error_txt
 135 ** $1
 136 "
 137 ginac_error=yes])
 138
 139 dnl Usage: GINAC_WARNING(message)
 140 dnl This macro displays the warning "message" and sets the flag ginac_warning
 141 dnl to yes.
 142 AC_DEFUN([GINAC_WARNING],[
 143 ginac_warning_txt="$ginac_warning_txt
 144 == $1
 145 "
 146 ginac_warning=yes])
 147
 148 dnl Usage: GINAC_CHECK_ERRORS
 149 dnl (must be put at end of configure.in, because it exits on error)
 150 dnl This macro displays a warning message if GINAC_ERROR or GINAC_WARNING
 151 dnl has occured previously.
 152 AC_DEFUN([GINAC_CHECK_ERRORS],[
 153 if test "x${ginac_error}" = "xyes"; then
 154         echo
 155     echo "**** The following problems have been detected by configure."
 156     echo "**** Please check the messages below before running \"make\"."
 157     echo "**** (see the section 'Common Problems' in the INSTALL file)"
 158     echo "$ginac_error_txt"
 159     if test "x${ginac_warning_txt}" != "x"; then
 160         echo "${ginac_warning_txt}"
 161     fi
 162     if test "x$cache_file" != "x/dev/null"; then
 163         echo "deleting cache ${cache_file}"
 164         rm -f $cache_file
 165     fi
 166     exit 1
 167 else
 168     if test "x${ginac_warning}" = "xyes"; then
 169                 echo
 170         echo "=== The following minor problems have been detected by configure."
 171         echo "=== Please check the messages below before running \"make\"."
 172         echo "=== (see the section 'Common Problems' in the INSTALL file)"
 173         echo "$ginac_warning_txt"
 174     fi
 175     echo "Configuration of GiNaC $VERSION done. Now type \"make\"."
 176 fi])
 177
 178 AC_DEFUN([GINAC_HAVE_RUSAGE],
 179 [AC_CACHE_CHECK([whether struct rusage is declared in <sys/resource.h>],
 180 ac_cv_have_rusage,
 181  [AC_TRY_COMPILE([#include <sys/times.h>
 182                   #include <sys/resource.h>],
 183                   [struct rusage resUsage;
 184                    getrusage(RUSAGE_SELF, &resUsage);
 185                    return 0;],
 186                  [ac_cv_have_rusage=yes],
 187                  [ac_cv_have_rusage=no])
 188 ])
 189 CONFIG_RUSAGE="no"
 190 if test "$ac_cv_have_rusage" = yes; then
 191   CONFIG_RUSAGE="yes"
 192   AC_DEFINE(HAVE_RUSAGE,,[define if struct rusage declared in <sys/resource.h>])
 193 fi
 194 AC_SUBST(CONFIG_RUSAGE)
 195 ])
 196
 197 dnl Usage: GINAC_EXCOMPILER
 198 dnl - Checks if dlopen is available
 199 dnl - Allows user to disable GiNaC::compile_ex (e.g. for security reasons)
 200 dnl Defines HAVE_LIBDL preprocessor macro, sets DL_LIBS and CONFIG_EXCOMPILER
 201 dnl variables.
 202 AC_DEFUN([GINAC_EXCOMPILER], [
 203 CONFIG_EXCOMPILER=yes
 204 DL_LIBS=""
 205
 206 AC_ARG_ENABLE([excompiler],
 207         [AS_HELP_STRING([--enable-excompiler], [Enable GiNaC::compile_ex (default: yes)])],
 208         [if test "$enableval" = "no"; then
 209                 CONFIG_EXCOMPILER="no"
 210         fi],
 211         [CONFIG_EXCOMPILER="yes"])
 212
 213 case $host_os in
 214         *mingw32*)
 215         CONFIG_EXCOMPILER="notsupported"
 216         ;;
 217         *)
 218         ;;
 219 esac
 220
 221 if test "$CONFIG_EXCOMPILER" = "yes"; then
 222         AC_CHECK_HEADER([dlfcn.h], [CONFIG_EXCOMPILER="yes"], [CONFIG_EXCOMPILER="no"])
 223 elif test "$CONFIG_EXCOMPILER" = "no"; then
 224         AC_MSG_NOTICE([GiNaC::compile_ex disabled at user request.])
 225 else
 226         AC_MSG_NOTICE([GiNaC::compile_ex is not supported on $host_os.])
 227 fi
 228
 229 if test "$CONFIG_EXCOMPILER" = "yes"; then
 230         dnl Some systems (GNU/Linux, Solaris) have dlopen in -ldl, some
 231         dnl others (OpenBSD) -- in libc
 232         found_dlopen_lib="no"
 233         DL_LIBS="-ldl"
 234         AC_CHECK_LIB(dl, dlopen, [found_dlopen_lib="yes"])
 235         if test "$found_dlopen_lib" = "no"; then
 236                 DL_LIBS=""
 237                 AC_CHECK_FUNC(dlopen, [found_dlopen_lib="yes"])
 238         fi
 239         if test "$found_dlopen_lib" = "no"; then
 240                 CONFIG_EXCOMPILER="no"
 241                 AC_MSG_WARN([Could not found working dlopen(). GiNaC::compile_ex will be disabled.])
 242         else
 243                 AC_DEFINE(HAVE_LIBDL, 1, [set to 1 if dlopen() works.])
 244         fi
 245 fi
 246 AC_SUBST(DL_LIBS)
 247 AC_SUBST(CONFIG_EXCOMPILER)])
 248