Limitations of Make: make -k exit status not trustable

[Alexandre Duret-Lutz]

Ok to commit?

2002-07-24  Alexandre Duret-Lutz  <address@hidden>

        * doc/autoconf.texi (Limitations of Make): Never trust the
        exit status of `make -k'.

Index: doc/autoconf.texi
===================================================================
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.651
diff -u -r1.651 autoconf.texi
--- doc/autoconf.texi   24 Jul 2002 00:38:49 -0000      1.651
+++ doc/autoconf.texi   24 Jul 2002 21:36:42 -0000
@@ -10421,6 +10421,27 @@
 World
 @end example
 
address@hidden @code{make -k}
address@hidden @code{make -k}
+
+Do not rely on the exit status of @code{make -k}.  Some implementations
+reflect whether they encountered an error in their exit status; other
+implementations always succeed.
+
address@hidden
+% @kbd{cat Makefile}
+all:
+        false
+% @kbd{make -k; echo exit status: $?}    # GNU make
+false
+make: *** [all] Error 1
+exit status: 2
+% @kbd{pmake -k; echo exit status: $?}   # BSD make
+false
+*** Error code 1 (continuing)
+exit status: 0
address@hidden example
+
 @item @code{VPATH}
 @cindex @code{VPATH}
 
-- 
Alexandre Duret-Lutz