Since FreeType uses `$(value ...)', we now need GNU make 3.80 or
newer.
* configure: zsh doesn't like ${1+"$@"}.
Update needed GNU make version.
* builds/toplevel.mk: Check for `$(eval ...)'.
* docs/INSTALL.GNU, docs/INSTALL.CROSS, docs/INSTALL.UNIX: Document
it.
diff --git a/docs/INSTALL.UNIX b/docs/INSTALL.UNIX
index 3ddfb8e..1d5af99 100644
--- a/docs/INSTALL.UNIX
+++ b/docs/INSTALL.UNIX
@@ -19,7 +19,7 @@
GNU Make <version number>
Copyright (C) <year> Free Software Foundation Inc.
- Note that version 3.78.1 or higher is *required* or the build will
+ Note that version 3.80 or higher is *required* or the build will
fail.
It is also fine to have GNU Make under another name (e.g. 'gmake')