X-Git-Url: http://git.draconx.ca/gitweb/dxcommon.git/blobdiff_plain/8c45dd9fec485578a09dbf541d4209dcf77acd5f..7029e258114ecffe7a80be495fba50a70e6ab00c:/m4/base.m4

diff --git a/m4/base.m4 b/m4/base.m4
index fd9b811..c14ba68 100644
--- a/m4/base.m4
+++ b/m4/base.m4
@@ -1,6 +1,6 @@
-dnl Copyright © 2012, 2014, 2021 Nick Bowler
+dnl Copyright © 2012, 2014, 2021, 2023 Nick Bowler
 dnl
-dnl Base directory handling for dxcommon.
+dnl Basic macros for dxcommon.
 dnl
 dnl License WTFPL2: Do What The Fuck You Want To Public License, version 2.
 dnl This is free software: you are free to do what the fuck you want to.
@@ -76,3 +76,10 @@ dnl complex shell command suitable for use in shell conditionals.
 AC_DEFUN([DX_RUN_LOG], [{ (set -x; $1;) >&AS_MESSAGE_LOG_FD 2>&1
   dx_status=$?; AS_ECHO(["\$? = $dx_status"]) >&AS_MESSAGE_LOG_FD 2>&1
   test $dx_status = 0; }])
+
+# DX_PATCH_MACRO([macro-name], [regexp], [replacement])
+#
+# Patches the definition of macro-name by replacing substrings that match
+# the given regexp (a la m4_bpatsubst).
+AC_DEFUN([DX_PATCH_MACRO], [m4_ifdef([$1],
+  [m4_define([$1], m4_bpatsubst(m4_dquote(m4_defn([$1])), [$2], [$3]))])])