- clarify comment about counterintuitive sorting for Laplace.

[ginac.git] / configure.in

diff --git a/configure.in b/configure.in
index 463a66e95887bda2bf653d5d5efcc479be886a10..aa0d315b86266db3edeafd6aa8f95b8a963f04e7 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -19,9 +19,9 @@ dnl (don't we all *love* M4?)...
 
 GINACLIB_MAJOR_VERSION=0
 GINACLIB_MINOR_VERSION=9
-GINACLIB_MICRO_VERSION=1
-GINACLIB_INTERFACE_AGE=0
-GINACLIB_BINARY_AGE=0
+GINACLIB_MICRO_VERSION=4
+GINACLIB_INTERFACE_AGE=1
+GINACLIB_BINARY_AGE=1
 GINACLIB_VERSION=$GINACLIB_MAJOR_VERSION.$GINACLIB_MINOR_VERSION.$GINACLIB_MICRO_VERSION
 
 AC_SUBST(GINACLIB_MAJOR_VERSION)
@@ -40,8 +40,8 @@ dnl The version number in newly created archives will be ARCHIVE_VERSION.
 dnl Archives version (ARCHIVE_VERSION-ARCHIVE_AGE) thru ARCHIVE_VERSION can
 dnl be read by this version of the GiNaC library.
 
-ARCHIVE_VERSION=0
-ARCHIVE_AGE=0
+ARCHIVE_VERSION=1
+ARCHIVE_AGE=1
 
 AC_SUBST(ARCHIVE_VERSION)
 AC_SUBST(ARCHIVE_AGE)
@@ -107,8 +107,19 @@ dnl Make sure all the necessary new-style headers are installed on the system.
 dnl If one of them cannot be found the system is probably not ANSI-conform
 dnl enough so trying the .h-style headers is a waste of time.
 AC_CHECK_HEADERS(iostream vector map string list typeinfo iterator stdexcept algorithm, ,
-  AC_MSG_ERROR(need to have ANSI compliant headers))
+  AC_MSG_ERROR([need to have ANSI compliant headers]))
+dnl We need the sstream header.  But since g++-2.95.n, n<3  does not provide
+dnl it, we must fall back to strstream, which, however, suffers from fixed
+dnl buffer sizes.  So the fallback may produce a crippled library. NB: this
+dnl fallback will disappear in future versions.
 AC_CHECK_HEADERS(sstream strstream)
+if test "x${ac_cv_header_sstream}" = "xno"; then
+  if test "x${ac_cv_header_strstream}" = "xno"; then
+    AC_MSG_ERROR([I could not find the <sstream> or <strstream> header.])
+  else
+    GINAC_WARNING([I could not find <sstream>.  <strstream> may cause trouble.])
+  fi
+fi
 
 dnl We need to have Bruno Haible's CLN installed.
 dnl (CLN versions >= 1.1.0 must have installed cln.m4 at a visible place,