Paul Smith 9ae02b7916 [SV 45728] Detect changes in .VARIABLES more accurately. ... For performance, we only recompute .VARIABLES when (a) it's expanded and (b) when its value will change from a previous expansion. To determine (b) we were checking the number of entries in the hash table which used to work until we started undefining entries: now if you undefine and redefine the same number of entries in between expanding .VARIABLES, it doesn't detect any change. Instead, keep an increasing change number. * variables.c: Add variable_changenum. (define_variable_in_set, merge_variable_sets): Increment variable_changenum if adding a new variable to the global set. (undefine_variable_in_set): Increment variable_changenum if undefining a variable from the global set. (lookup_special_var): Test variable_changenum not the hash table. * tests/scripts/variables/special: Test undefining variables.		2016-03-13 18:23:20 -04:00
..
automatic
CURDIR
DEFAULT_GOAL	Convert all "`'" quotes to "''" per new GNU Coding Standard guidelines.	2012-03-04 00:24:20 +00:00
define	Convert all "`'" quotes to "''" per new GNU Coding Standard guidelines.	2012-03-04 00:24:20 +00:00
flavors	Add support for "::=" simple assignment operator.	2012-01-30 00:21:57 +00:00
GNUMAKEFLAGS	* GNUMAKEFLAGS: Remove -O so it passes in NO_OUTPUT_SYNC mode.	2013-10-19 12:05:58 -04:00
INCLUDE_DIRS
LIBPATTERNS	Convert all "`'" quotes to "''" per new GNU Coding Standard guidelines.	2012-03-04 00:24:20 +00:00
MAKE	Convert all "`'" quotes to "''" per new GNU Coding Standard guidelines.	2012-03-04 00:24:20 +00:00
MAKE_RESTARTS	Enhance the output sync mode.	2013-09-12 04:07:52 -04:00
MAKECMDGOALS
MAKEFILES
MAKEFLAGS	Enhance the output sync mode.	2013-09-12 04:07:52 -04:00
MAKELEVEL
MFILE_LIST
negative
private	cosmetics: fix few innocuous typos	2013-05-05 20:50:37 -04:00
SHELL	Solaris /bin/sh can't handle multiple options ("-e -c").	2013-09-30 00:12:18 -04:00
special	[SV 45728] Detect changes in .VARIABLES more accurately.	2016-03-13 18:23:20 -04:00
undefine