diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 20 |
1 files changed, 18 insertions, 2 deletions
@@ -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 variable now contains all prerequisites that caused the target to be considered out of date, even if they do not exist (previously only existing targets were provided in $?).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 |