+
+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 "**** 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 "=== 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_LIB(dl, dlopen, [
+ DL_LIBS="-ldl"
+ AC_DEFINE(HAVE_LIBDL, 1, [set to 1 if you have a working libdl installed.])],
+
+ [AC_MSG_WARN([libdl not found. GiNaC::compile_ex will be disabled.])
+ CONFIG_EXCOMPILER="no"])
+elif test "$CONFIG_EXCOMPILER" = "no"; then
+ AC_MSG_RESULT([INFO: GiNaC::compile_ex disabled at user request.])
+else
+ AC_MSG_RESULT([INFO: GiNaC::compile_ex is not supported on $host_os.])
+fi
+AC_SUBST(DL_LIBS)
+AC_SUBST(CONFIG_EXCOMPILER)])
+