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-rw-r--r--Build/source/m4/kpse-common.m416
1 files changed, 16 insertions, 0 deletions
diff --git a/Build/source/m4/kpse-common.m4 b/Build/source/m4/kpse-common.m4
index 86ab1decc8c..05386a7b70d 100644
--- a/Build/source/m4/kpse-common.m4
+++ b/Build/source/m4/kpse-common.m4
@@ -259,3 +259,19 @@ AC_DEFUN([KPSE_ADD_FLAGS],
CPPFLAGS="$CPPFLAGS $[]AS_TR_CPP($1)_INCLUDES"
LIBS="$[]AS_TR_CPP($1)_LIBS $LIBS"
]) # KPSE_ADD_FLAGS
+
+# KPSE_MSG_ERROR(PACKAGE, ERROR, [EXIT-STATUS = 1])
+# -------------------------------------------------
+# Same as AC_MSG_ERROR(ERROR, EXIT-STATUS), except when building this
+# package PACKAGE has been disabled.
+#
+# The new (2009) TL build system requires all directories to be configured
+# for the benefit of 'dist*' Make targets. When building PACKAGE has been
+# disabled, configuring that package must not fail because building required
+# libraries from the TL tree has been disabled as a consequence.
+AC_DEFUN([KPSE_MSG_ERROR],
+[AS_IF([test "x$enable_build" = xno],
+ [AC_MSG_WARN([building $1 has been disabled and would fail because
+$2])],
+ [AC_MSG_ERROR([$2], m4_default([$3], 1))])
+]) # KPSE_MSG_ERROR