X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?a=blobdiff_plain;f=configure.ac;h=631cbc07861dbb3498c9f4ec858b1090a9e04542;hb=df823d53c56c762072f534c9f24479090162e33a;hp=14b888f1960d8df5df58e5504bd5508808395c38;hpb=f38cbcd651246fb5c1294705d29399f3cbfddaf5;p=ginac.git

diff --git a/configure.ac b/configure.ac
index 14b888f1..631cbc07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,10 +12,11 @@ dnl version number. In particular, library version is OS dependent.
 dnl
 dnl When making releases, do
 dnl 1. Increment ginac_lt_revision
-dnl 2. If any interfaces have been added, removed, or changed since the last
-dnl    release, increment ginac_lt_current and set ginac_lt_revision to 0.
-dnl 3. If any interfaces have been removed since the last release, set 
-dnl    ginac_lt_age to 0.
+dnl 2. If any interfaces have been added since the last release, increment
+dnl    ginac_lt_current and set ginac_lt_revision to 0.
+dnl 3. If any interfaces have been changed or removed since the last release,
+dnl    make sure you increment ginac_minor_version above and reset both
+dnl    ginac_lt_current and ginac_lt_revision to 0.
 dnl
 dnl Please note: the libtool naming scheme cannot guarantee that on all
 dnl systems, the numbering is consecutive. It only guarantees that it is
@@ -23,7 +24,6 @@ dnl increasing. This doesn't matter, though: there is not incurred cost
 dnl for numbers that are omitted, except for shrinking the available space
 dnl of leftover numbers. Not something we need to worry about yet. ;-)
 m4_define([ginac_lt_current], [0])
-m4_define([ginac_lt_age], [0])
 m4_define([ginac_lt_revision], [0])
 
 AC_INIT([GiNaC], ginac_version, [<ginac-list@ginac.de>])
@@ -57,8 +57,10 @@ AC_SUBST(ARCHIVE_AGE)
 AC_DEFINE_UNQUOTED(ARCHIVE_VERSION, $ARCHIVE_VERSION, [Current GiNaC archive file version number])
 AC_DEFINE_UNQUOTED(ARCHIVE_AGE, $ARCHIVE_AGE, [GiNaC archive file version age])
 
-dnl libtool versioning
-LT_VERSION_INFO="ginac_lt_current:ginac_lt_revision:ginac_lt_age"
+dnl libtool versioning (We don't use libtool's age numbering since we promise
+dnl to keep the binary interface compatible if only ginac_micro_version changes.
+dnl In effect, age==current.)
+LT_VERSION_INFO="ginac_lt_current:ginac_lt_revision:ginac_lt_current"
 LT_RELEASE="ginac_release"
 
 AC_SUBST(LT_VERSION_INFO)
@@ -80,10 +82,7 @@ AC_LANG([C++])
 dnl Make sure all the necessary standard headers are installed on the system.
 GINAC_STD_CXX_HEADERS
 
-dnl We need to have Bruno Haible's CLN installed.
-dnl (pkg-config must have installed pkg.m4 at a visible place, which provides
-dnl this macro. CLN >= 1.1.6 must have installed cln.pc at a visible place,
-dnl which provides the actual dependency information.)
+dnl We need to have CLN installed.
 PKG_CHECK_MODULES(CLN, cln >= 1.2.2)
 AC_LIB_LINKFLAGS_FROM_LIBS([CLN_RPATH], [$CLN_LIBS], [1])
 LIBS="$LIBS $CLN_LIBS $CLN_RPATH"
@@ -105,6 +104,7 @@ GINAC_READLINE
 
 dnl Check for dl library (needed for GiNaC::compile).
 GINAC_EXCOMPILER
+AM_CONDITIONAL(CONFIG_EXCOMPILER, [test "x${CONFIG_EXCOMPILER}" = "xyes"])
 
 dnl Check for utilities needed by the different kinds of documentation.
 dnl Documentation needs only be built when extending it, so never mind if it