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_$1,[ginac/version.h])])
  24
  25 dnl Usage: GINAC_STD_CXX_HEADERS
  26 dnl Check for standard C++ headers, bail out if something is missing.
  27 AC_DEFUN([GINAC_STD_CXX_HEADERS], [
  28 AC_CACHE_CHECK([for standard C++ header files], [ginac_cv_std_cxx_headers], [
  29         ginac_cv_std_cxx_headers="no"
  30         AC_LANG_PUSH([C++])
  31         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  32                 #include <algorithm>
  33                 #include <cstring>
  34                 #include <cstddef>
  35                 #include <cstdint>
  36                 #include <ctime>
  37                 #include <fstream>
  38                 #include <functional>
  39                 #include <iomanip>
  40                 #include <ios>
  41                 #include <iosfwd>
  42                 #include <iostream>
  43                 #include <iterator>
  44                 #include <limits>
  45                 #include <list>
  46                 #include <map>
  47                 #include <memory>
  48                 #include <numeric>
  49                 #include <ostream>
  50                 #include <set>
  51                 #include <sstream>
  52                 #include <stack>
  53                 #include <stdexcept>
  54                 #include <string>
  55                 #include <typeinfo>
  56                 #include <utility>
  57                 #include <vector>
  58                 ]])], [ginac_cv_std_cxx_headers="yes"])
  59         AC_LANG_POP([C++])])
  60 if test "${ginac_cv_std_cxx_headers}" != "yes"; then
  61         AC_MSG_ERROR([Standard ISO C++ headers are missing])
  62 fi
  63 ])
  64
  65 dnl Usage: GINAC_LIBREADLINE
  66 dnl
  67 dnl Check if GNU readline library and headers are avialable.
  68 dnl Defines GINSH_LIBS variable, and HAVE_LIBREADLINE,
  69 dnl HAVE_READLINE_READLINE_H, HAVE_READLINE_HISTORY_H preprocessor macros.
  70 dnl
  71 dnl Note: this macro rejects readline versions <= 4.2 and non-GNU
  72 dnl implementations.
  73 dnl
  74 AC_DEFUN([GINAC_READLINE],[
  75 AC_REQUIRE([GINAC_TERMCAP])
  76 GINSH_LIBS=""
  77 AC_CHECK_HEADERS(readline/readline.h readline/history.h)
  78 if test "x${ac_cv_header_readline_readline_h}" != "xyes" -o "x${ac_cv_header_readline_history_h}" != "xyes"; then
  79         GINAC_WARNING([ginsh will not compile, because readline headers could not be found.])
  80 else
  81         AC_CACHE_CHECK([for version of libreadline], [ginac_cv_rl_supported], [
  82                 ginac_cv_rl_supported="no"
  83                 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  84                         #include <stdio.h>
  85                         #include <readline/readline.h>
  86                         #if !defined(RL_VERSION_MAJOR) || !defined(RL_VERSION_MINOR)
  87                         #error "Ancient/unsupported version of readline"
  88                         #endif]])],
  89                         [ginac_cv_rl_supported="yes"])])
  90         if test "x${ginac_cv_rl_supported}" != "xyes"; then
  91                 GINAC_WARNING([ginsh will not compile, because of an unsupported version of readline (<= 4.2 or non-GNU).])
  92         else
  93                 save_LIBS="$LIBS"
  94                 LIBS="$LIBTERMCAP $LIBS"
  95                 AC_CHECK_LIB(readline, readline)
  96                 if test "x${ac_cv_lib_readline_readline}" != "xyes"; then
  97                         GINAC_WARNING([ginsh will not compile, because libreadline could not be found.])
  98                 fi
  99                 GINSH_LIBS="$LIBS"
 100                 LIBS="$save_LIBS"
 101         fi
 102 fi
 103 AC_SUBST(GINSH_LIBS)])
 104
 105 dnl Usage: GINAC_TERMCAP
 106 dnl libreadline is based on the termcap functions.
 107 dnl Some systems have tgetent(), tgetnum(), tgetstr(), tgetflag(), tputs(),
 108 dnl tgoto() in libc, some have it in libtermcap, some have it in libncurses.
 109 dnl When both libtermcap and libncurses exist, we prefer the latter, because
 110 dnl libtermcap is being phased out.
 111 AC_DEFUN([GINAC_TERMCAP],
 112 [LIBTERMCAP=
 113 case $host_os in
 114 *mingw32*)
 115  ;; dnl no termcap libraries are necessary (need hacked libreadline)
 116 *)
 117 AC_CHECK_FUNCS(tgetent)
 118 if test "x$ac_cv_func_tgetent" = "xyes"; then
 119     :
 120 else
 121     AC_CHECK_LIB(ncurses, tgetent, LIBTERMCAP="-lncurses")
 122     if test -z "$LIBTERMCAP"; then
 123         AC_CHECK_LIB(termcap, tgetent, LIBTERMCAP="-ltermcap")
 124     fi
 125 fi
 126 ;;
 127 esac
 128 AC_SUBST(LIBTERMCAP)
 129 ])
 130
 131 dnl Usage: GINAC_ERROR(message)
 132 dnl This macro displays the warning "message" and sets the flag ginac_error
 133 dnl to yes.
 134 AC_DEFUN([GINAC_ERROR],[
 135 ginac_error_txt="$ginac_error_txt
 136 ** $1
 137 "
 138 ginac_error=yes])
 139
 140 dnl Usage: GINAC_WARNING(message)
 141 dnl This macro displays the warning "message" and sets the flag ginac_warning
 142 dnl to yes.
 143 AC_DEFUN([GINAC_WARNING],[
 144 ginac_warning_txt="$ginac_warning_txt
 145 == $1
 146 "
 147 ginac_warning=yes])
 148
 149 dnl Usage: GINAC_CHECK_ERRORS
 150 dnl (must be put at end of configure.in, because it exits on error)
 151 dnl This macro displays a warning message if GINAC_ERROR or GINAC_WARNING
 152 dnl has occured previously.
 153 AC_DEFUN([GINAC_CHECK_ERRORS],[
 154 if test "x${ginac_error}" = "xyes"; then
 155         echo
 156     echo "**** The following problems have been detected by configure."
 157     echo "**** Please check the messages below before running \"make\"."
 158     echo "**** (see the section 'Common Problems' in the INSTALL file)"
 159     echo "$ginac_error_txt"
 160     if test "x${ginac_warning_txt}" != "x"; then
 161         echo "${ginac_warning_txt}"
 162     fi
 163     if test "x$cache_file" != "x/dev/null"; then
 164         echo "deleting cache ${cache_file}"
 165         rm -f $cache_file
 166     fi
 167     exit 1
 168 else
 169     if test "x${ginac_warning}" = "xyes"; then
 170                 echo
 171         echo "=== The following minor problems have been detected by configure."
 172         echo "=== Please check the messages below before running \"make\"."
 173         echo "=== (see the section 'Common Problems' in the INSTALL file)"
 174         echo "$ginac_warning_txt"
 175     fi
 176     echo "Configuration of GiNaC $VERSION done. Now type \"make\"."
 177 fi])
 178
 179 AC_DEFUN([GINAC_HAVE_RUSAGE],
 180 [AC_CACHE_CHECK([whether struct rusage is declared in <sys/resource.h>],
 181 ac_cv_have_rusage,
 182  [AC_TRY_COMPILE([#include <sys/times.h>
 183                   #include <sys/resource.h>],
 184                   [struct rusage resUsage;
 185                    getrusage(RUSAGE_SELF, &resUsage);
 186                    return 0;],
 187                  [ac_cv_have_rusage=yes],
 188                  [ac_cv_have_rusage=no])
 189 ])
 190 CONFIG_RUSAGE="no"
 191 if test "$ac_cv_have_rusage" = yes; then
 192   CONFIG_RUSAGE="yes"
 193   AC_DEFINE(HAVE_RUSAGE,,[define if struct rusage declared in <sys/resource.h>])
 194 fi
 195 AC_SUBST(CONFIG_RUSAGE)
 196 ])
 197
 198 dnl Usage: GINAC_EXCOMPILER
 199 dnl - Checks if dlopen is available
 200 dnl - Allows user to disable GiNaC::compile_ex (e.g. for security reasons)
 201 dnl Defines HAVE_LIBDL preprocessor macro, sets DL_LIBS and CONFIG_EXCOMPILER
 202 dnl variables.
 203 AC_DEFUN([GINAC_EXCOMPILER], [
 204 CONFIG_EXCOMPILER=yes
 205 DL_LIBS=""
 206
 207 AC_ARG_ENABLE([excompiler],
 208         [AS_HELP_STRING([--enable-excompiler], [Enable GiNaC::compile_ex (default: yes)])],
 209         [if test "$enableval" = "no"; then
 210                 CONFIG_EXCOMPILER="no"
 211         fi],
 212         [CONFIG_EXCOMPILER="yes"])
 213
 214 case $host_os in
 215         *mingw32*)
 216         CONFIG_EXCOMPILER="notsupported"
 217         ;;
 218         *)
 219         ;;
 220 esac
 221
 222 if test "$CONFIG_EXCOMPILER" = "yes"; then
 223         AC_CHECK_HEADER([dlfcn.h], [CONFIG_EXCOMPILER="yes"], [CONFIG_EXCOMPILER="no"])
 224 elif test "$CONFIG_EXCOMPILER" = "no"; then
 225         AC_MSG_NOTICE([GiNaC::compile_ex disabled at user request.])
 226 else
 227         AC_MSG_NOTICE([GiNaC::compile_ex is not supported on $host_os.])
 228 fi
 229
 230 if test "$CONFIG_EXCOMPILER" = "yes"; then
 231         dnl Some systems (GNU/Linux, Solaris) have dlopen in -ldl, some
 232         dnl others (OpenBSD) -- in libc
 233         found_dlopen_lib="no"
 234         DL_LIBS="-ldl"
 235         AC_CHECK_LIB(dl, dlopen, [found_dlopen_lib="yes"])
 236         if test "$found_dlopen_lib" = "no"; then
 237                 DL_LIBS=""
 238                 AC_CHECK_FUNC(dlopen, [found_dlopen_lib="yes"])
 239         fi
 240         if test "$found_dlopen_lib" = "no"; then
 241                 CONFIG_EXCOMPILER="no"
 242                 AC_MSG_WARN([Could not found working dlopen(). GiNaC::compile_ex will be disabled.])
 243         else
 244                 AC_DEFINE(HAVE_LIBDL, 1, [set to 1 if dlopen() works.])
 245         fi
 246 fi
 247 AC_SUBST(DL_LIBS)
 248 AC_SUBST(CONFIG_EXCOMPILER)])
 249