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-rw-r--r--NEWS20
1 files changed, 18 insertions, 2 deletions
diff --git a/NEWS b/NEWS
index f452686..b9577c9 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,15 @@ Version 3.81.90
standard runtime library.
* WARNING: Backward-incompatibility!
+ The POSIX standard for make was changed in the 2008 version in a
+ fundamentally incompatible way: make is required to invoke the shell as if
+ the '-e' flag were provided. Because this would break many makefiles that
+ have been written to conform to the original text of the standard, the
+ default behavior of GNU make remains to invoke the shell with simply '-c'.
+ However, any makefile specifying the .POSIX special target will follow the
+ new POSIX standard and pass '-e' to the shell. See also .SHELLFLAGS below.
+
+* WARNING: Backward-incompatibility!
The '$?' variable now contains all prerequisites that caused the target to
be considered out of date, even if they do not exist (previously only
existing targets were provided in $?).
@@ -58,6 +67,10 @@ Version 3.81.90
set and reset at will; recipes will use the value active when they were
first parsed. To detect this feature check the value of $(.RECIPEPREFIX).
+* New special variable: .SHELLFLAGS allows you to change the options passed to
+ the shell when it invokes recipes. By default the value will be "-c" (or
+ "-ec" if .POSIX is set).
+
* New variable modifier 'private': prefixing a variable assignment with the
modifier 'private' suppresses inheritance of that variable by
prerequisites. This is most useful for target- and pattern-specific
@@ -66,13 +79,17 @@ Version 3.81.90
* New make directive: 'undefine' allows you to undefine a variable so
that it appears as if it was never set. Both $(flavor) and $(origin)
functions will return 'undefined' for such a variable. To detect this
- feature search for 'undefine in the .FEATURES special variable.
+ feature search for 'undefine' in the .FEATURES special variable.
* The parser for variable assignments has been enhanced to allow multiple
modifiers ('export', 'override', 'private') on the same line as variables,
including define/endef variables, and in any order. Also, it is possible
to create variables and targets named as these modifiers.
+* The 'define' make directive now allows a variable assignment operator after
+ the variable name, to allow for simple, conditional, or appending multi-line
+ variable assignment.
+
Version 3.81
@@ -109,7 +126,6 @@ Version 3.81
of this SysV feature you will need to update them.
* WARNING: Backward-incompatibility!
-
In order to comply with POSIX, the way in which GNU make processes
backslash-newline sequences in recipes has changed. If your makefiles
use backslash-newline sequences inside of single-quoted strings in