Update the supported platforms/compilers list.
[ginac.git] / acinclude.m4
index f4368eb..1e53fa4 100644 (file)
@@ -4,114 +4,215 @@ dnl additions' names with AC_ but with GINAC_ in order to steer clear of
 dnl future trouble.
 dnl ===========================================================================
 
-dnl Generally, it is a bad idea to put specialized header files for a library
-dnl into a generic directory like /usr/local/include/.  Instead, one should put
-dnl them into a subdirectory.  GiNaC does it, NTL does it.  Unfortunately, CLN
-dnl doesn't do so but some people choose to do it by hand.  In these cases we
-dnl need to #include <CLN/cln.h>, otherwise #include <cln.h>.  This macro
-dnl tries to be clever and find out the correct way by defining the variable
-dnl HAVE_CLN_CLN_H in config.h:
-AC_DEFUN(GINAC_CHECK_CLN_H,
-    [AC_PROVIDE([$0])
-    AC_CHECK_HEADERS(CLN/cln.h, ,
-        AC_CHECK_HEADERS(cln.h, ,
-            AC_MSG_ERROR([cannot find header for Bruno Haible's CLN]);
-        )
-    )
+dnl Usage: GINAC_STD_CXX_HEADERS
+dnl Check for standard C++ headers, bail out if something is missing.
+AC_DEFUN([GINAC_STD_CXX_HEADERS], [
+AC_CACHE_CHECK([for standard C++ header files], [ginac_cv_std_cxx_headers], [
+       ginac_cv_std_cxx_headers="no"
+       AC_LANG_PUSH([C++])
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+               #include <iosfwd>
+               #include <iostream>
+               #include <vector>
+               #include <list>
+               #include <map>
+               #include <set>
+               #include <string>
+               #include <sstream>
+               #include <typeinfo>
+               #include <stdexcept>
+               #include <algorithm>
+               #include <limits>
+               #include <ctime>
+               ]])], [ginac_cv_std_cxx_headers="yes"])
+       AC_LANG_POP([C++])])
+if test "${ginac_cv_std_cxx_headers}" != "yes"; then
+       AC_MSG_ERROR([Standard ISO C++ 98 headers are missing])
+fi
 ])
 
-dnl This macro is needed because the generic AC_CHECK_LIB doesn't work because
-dnl C++ is more strongly typed than C.  Therefore we need to work with the 
-dnl more fundamental AC_TRY_LINK instead.
-AC_DEFUN(GINAC_CHECK_LIBCLN,
-    [AC_PROVIDE([$0])
-    AC_MSG_CHECKING([how to link with libcln])
-    saved_LIBS="${LIBS}"
-    AC_CACHE_VAL(ginac_cv_lib_cln_link,
-        [LIBS="-lcln"
-        case "${ac_cv_header_CLN_cln_h}" in
-        "yes")
-            AC_TRY_LINK([#include <CLN/cln.h>],
-                [factorial(1);],
-                ginac_cv_lib_cln_link="-lcln",
-                ginac_cv_lib_cln_link="fail")
-            ;;
-        *)
-            AC_TRY_LINK([#include <cln.h>],
-                [factorial(1);],
-                ginac_cv_lib_cln_link="-lcln",
-                ginac_cv_lib_cln_link="fail")
-            ;;
-        esac
-    ])
-    case "${ginac_cv_lib_cln_link}" in
-dnl linking worked:
-    "-lcln")
-        LIBS="-lcln ${saved_LIBS}"
-        AC_MSG_RESULT([-lcln])
-        GINAC_CHECK_LIBCLN_SANITY
-    ;;
-dnl linking failed:
-    "fail")
-        LIBS="${saved_LIBS}"
-        AC_MSG_RESULT([])
-        AC_MSG_WARN([linking with libcln failed])
-    ;;
-dnl should never ever get here:
-    *)
-        LIBS="${saved_LIBS}"
-    ;;
-    esac
+dnl Usage: GINAC_LIBREADLINE
+dnl
+dnl Check if GNU readline library and headers are avialable.
+dnl Defines GINSH_LIBS variable, and HAVE_LIBREADLINE,
+dnl HAVE_READLINE_READLINE_H, HAVE_READLINE_HISTORY_H preprocessor macros.
+dnl
+dnl Note: this macro rejects readline versions <= 4.2 and non-GNU
+dnl implementations.
+dnl
+AC_DEFUN([GINAC_READLINE],[
+AC_REQUIRE([GINAC_TERMCAP])
+GINSH_LIBS=""
+AC_CHECK_HEADERS(readline/readline.h readline/history.h)
+if test "x${ac_cv_header_readline_readline_h}" != "xyes" -o "x${ac_cv_header_readline_history_h}" != "xyes"; then
+       GINAC_WARNING([ginsh will not compile, because readline headers could not be found.])
+else
+       AC_CACHE_CHECK([for version of libreadline], [ginac_cv_rl_supported], [
+               ginac_cv_rl_supported="no"
+               AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+                       #include <stdio.h>
+                       #include <readline/readline.h>
+                       #if !defined(RL_VERSION_MAJOR) || !defined(RL_VERSION_MINOR)
+                       #error "Ancient/unsupported version of readline"
+                       #endif]])],
+                       [ginac_cv_rl_supported="yes"])])
+       if test "x${ginac_cv_rl_supported}" != "xyes"; then
+               GINAC_WARNING([ginsh will not compile, because of an unsupported version of readline (<= 4.2 or non-GNU).])
+       else
+               save_LIBS="$LIBS"
+               LIBS="$LIBTERMCAP $LIBS"
+               AC_CHECK_LIB(readline, readline)
+               if test "x${ac_cv_lib_readline_readline}" != "xyes"; then
+                       GINAC_WARNING([ginsh will not compile, because libreadline could not be found.])
+               fi
+               GINSH_LIBS="$LIBS"
+               LIBS="$save_LIBS"
+       fi
+fi
+AC_SUBST(GINSH_LIBS)])
+       
+dnl Usage: GINAC_TERMCAP
+dnl libreadline is based on the termcap functions.
+dnl Some systems have tgetent(), tgetnum(), tgetstr(), tgetflag(), tputs(),
+dnl tgoto() in libc, some have it in libtermcap, some have it in libncurses.
+dnl When both libtermcap and libncurses exist, we prefer the latter, because
+dnl libtermcap is being phased out.
+AC_DEFUN([GINAC_TERMCAP],
+[LIBTERMCAP=
+case $host_os in
+*mingw32*)
+ ;; dnl no termcap libraries are necessary (need hacked libreadline)
+*)
+AC_CHECK_FUNCS(tgetent)
+if test "x$ac_cv_func_tgetent" = "xyes"; then
+    :
+else
+    AC_CHECK_LIB(ncurses, tgetent, LIBTERMCAP="-lncurses")
+    if test -z "$LIBTERMCAP"; then
+        AC_CHECK_LIB(termcap, tgetent, LIBTERMCAP="-ltermcap")
+    fi
+fi
+;;
+esac
+AC_SUBST(LIBTERMCAP)
 ])
 
-dnl Check if the CLN library suits our needs, i.e. if it is new enough, by
-dnl trying to run into a little bug which was present till version 1.0.1 and
-dnl then removed.
-AC_DEFUN(GINAC_CHECK_LIBCLN_SANITY,
-    [AC_PROVIDE([$0])
-    AC_MSG_CHECKING([whether libcln behaves sane])
-    AC_CACHE_VAL(ginac_cv_lib_cln_integrity,
-        [
-        case "${ac_cv_header_CLN_cln_h}" in
-        "yes")
-            AC_TRY_RUN([#include <CLN/cln.h>
-int main() {
-cl_RA q(3); q = q/2; cl_RA p(3); p = p/2;
-if (q+p != 3) return 1; else return 0;
-}],
-                ginac_cv_lib_cln_integrity="sane",
-                ginac_cv_lib_cln_integrity="insane",
-                ginac_cv_lib_cln_integrity="guessing sane")
-            ;;
-        *)
-            AC_TRY_RUN([#include <cln.h>
-int main() {
-cl_RA q(3); q = q/2; cl_RA p(3); p = p/2;
-if (q+p != 3) return 1; else return 0;
-}],
-                ginac_cv_lib_cln_integrity="sane",
-                ginac_cv_lib_cln_integrity="insane",
-                ginac_cv_lib_cln_integrity="guessing sane")
-            ;;
-        esac
-    ])
-    case "${ginac_cv_lib_cln_integrity}" in
-dnl exit status was 0:
-    "sane")
-        AC_MSG_RESULT([yes])
-    ;;
-dnl exit status was not 0:
-    "insane")
-        AC_MSG_RESULT([no])
-        AC_MSG_WARN([maybe version of libcln is older than 1.0.2?])
-    ;;
-dnl test-program was not run because we are cross-compiling:
-    "guessing sane")
-        AC_MSG_RESULT([hopefully])
-    ;;
-dnl should never ever get here:
-    *)
-        AC_MSG_WARN([you found a bug in the configure script!])
-    ;;
-    esac
+dnl Usage: GINAC_ERROR(message)
+dnl This macro displays the warning "message" and sets the flag ginac_error
+dnl to yes.
+AC_DEFUN([GINAC_ERROR],[
+ginac_error_txt="$ginac_error_txt
+** $1
+"
+ginac_error=yes])
+
+dnl Usage: GINAC_WARNING(message)
+dnl This macro displays the warning "message" and sets the flag ginac_warning
+dnl to yes.
+AC_DEFUN([GINAC_WARNING],[
+ginac_warning_txt="$ginac_warning_txt
+== $1
+"
+ginac_warning=yes])
+
+dnl Usage: GINAC_CHECK_ERRORS
+dnl (must be put at end of configure.in, because it exits on error)
+dnl This macro displays a warning message if GINAC_ERROR or GINAC_WARNING 
+dnl has occured previously.
+AC_DEFUN([GINAC_CHECK_ERRORS],[
+if test "x${ginac_error}" = "xyes"; then
+       echo
+    echo "**** The following problems have been detected by configure."
+    echo "**** Please check the messages below before running \"make\"."
+    echo "**** (see the section 'Common Problems' in the INSTALL file)"
+    echo "$ginac_error_txt"
+    if test "x${ginac_warning_txt}" != "x"; then
+        echo "${ginac_warning_txt}"
+    fi
+    if test "x$cache_file" != "x/dev/null"; then
+        echo "deleting cache ${cache_file}"
+        rm -f $cache_file
+    fi
+    exit 1
+else 
+    if test "x${ginac_warning}" = "xyes"; then
+               echo
+        echo "=== The following minor problems have been detected by configure."
+        echo "=== Please check the messages below before running \"make\"."
+        echo "=== (see the section 'Common Problems' in the INSTALL file)"
+        echo "$ginac_warning_txt"
+    fi
+    echo "Configuration of GiNaC $VERSION done. Now type \"make\"."
+fi])
+
+AC_DEFUN([GINAC_HAVE_RUSAGE],
+[AC_CACHE_CHECK([whether struct rusage is declared in <sys/resource.h>],
+ac_cv_have_rusage,
+ [AC_TRY_COMPILE([#include <sys/times.h>
+                  #include <sys/resource.h>],
+                  [struct rusage resUsage;
+                   getrusage(RUSAGE_SELF, &resUsage);
+                   return 0;],
+                 [ac_cv_have_rusage=yes],
+                 [ac_cv_have_rusage=no])
 ])
+CONFIG_RUSAGE="no"
+if test "$ac_cv_have_rusage" = yes; then
+  CONFIG_RUSAGE="yes"
+  AC_DEFINE(HAVE_RUSAGE,,[define if struct rusage declared in <sys/resource.h>])
+fi
+AC_SUBST(CONFIG_RUSAGE)
+])
+
+dnl Usage: GINAC_EXCOMPILER
+dnl - Checks if dlopen is available
+dnl - Allows user to disable GiNaC::compile_ex (e.g. for security reasons)
+dnl Defines HAVE_LIBDL preprocessor macro, sets DL_LIBS and CONFIG_EXCOMPILER
+dnl variables.
+AC_DEFUN([GINAC_EXCOMPILER], [
+CONFIG_EXCOMPILER=yes
+DL_LIBS=""
+
+AC_ARG_ENABLE([excompiler], 
+       [AS_HELP_STRING([--enable-excompiler], [Enable GiNaC::compile_ex (default: yes)])],
+       [if test "$enableval" = "no"; then
+               CONFIG_EXCOMPILER="no"
+       fi],
+       [CONFIG_EXCOMPILER="yes"])
+
+case $host_os in
+       *mingw32*)
+       CONFIG_EXCOMPILER="notsupported"
+       ;;
+       *)
+       ;;
+esac
+
+if test "$CONFIG_EXCOMPILER" = "yes"; then
+       AC_CHECK_HEADER([dlfcn.h], [CONFIG_EXCOMPILER="yes"], [CONFIG_EXCOMPILER="no"])
+elif test "$CONFIG_EXCOMPILER" = "no"; then
+       AC_MSG_NOTICE([GiNaC::compile_ex disabled at user request.])
+else
+       AC_MSG_NOTICE([GiNaC::compile_ex is not supported on $host_os.])
+fi
+       
+if test "$CONFIG_EXCOMPILER" = "yes"; then
+       dnl Some systems (GNU/Linux, Solaris) have dlopen in -ldl, some
+       dnl others (OpenBSD) -- in libc
+       found_dlopen_lib="no"
+       DL_LIBS="-ldl"
+       AC_CHECK_LIB(dl, dlopen, [found_dlopen_lib="yes"])
+       if test "$found_dlopen_lib" = "no"; then
+               DL_LIBS=""
+               AC_CHECK_FUNC(dlopen, [found_dlopen_lib="yes"])
+       fi
+       if test "$found_dlopen_lib" = "no"; then
+               CONFIG_EXCOMPILER="no"
+               AC_MSG_WARN([Could not found working dlopen(). GiNaC::compile_ex will be disabled.])
+       else
+               AC_DEFINE(HAVE_LIBDL, 1, [set to 1 if dlopen() works.])
+       fi
+fi
+AC_SUBST(DL_LIBS)
+AC_SUBST(CONFIG_EXCOMPILER)])
+