[build] include config.h conditionally to not break non-autotools build.

[ginac.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index d5b3af5991326861b84bd1b35d50ca7008d90dae..7ca6c3bb3ee736d5de1aa7a8407702b20565956d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -84,7 +84,7 @@ GINAC_STD_CXX_HEADERS
 
 dnl We need to have CLN installed.
 PKG_CHECK_MODULES(CLN, cln >= 1.2.2)
-AC_LIB_LINKFLAGS_FROM_LIBS([CLN_RPATH], [$CLN_LIBS], [1])
+AC_LIB_LINKFLAGS_FROM_LIBS([CLN_RPATH], [$CLN_LIBS])
 LIBS="$LIBS $CLN_LIBS $CLN_RPATH"
 CPPFLAGS="$CPPFLAGS $CLN_CFLAGS"
 dnl Include proper rpath into pkg-config meta data, so
@@ -101,6 +101,10 @@ dnl Check for stuff needed for building the GiNaC interactive shell (ginsh).
 AC_CHECK_HEADERS(unistd.h)
 GINAC_HAVE_RUSAGE
 GINAC_READLINE
+dnl Python is necessary for building function.{cpp,h}
+AC_PATH_PROG(PYTHON, python, "")
+AS_IF([test -z "$PYTHON" -a ! -f "$srcdir/ginac/function.cpp"],
+      [AC_MSG_ERROR([GiNaC will not compile because Python is missing])])
 
 dnl Check for dl library (needed for GiNaC::compile).
 GINAC_EXCOMPILER