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