diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/make.texi | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/doc/make.texi b/doc/make.texi index 7187e19..35a40dd 100644 --- a/doc/make.texi +++ b/doc/make.texi @@ -2873,6 +2873,21 @@ of @code{make} will be run serially, even if the @samp{-j} option is given. Any recursively invoked @code{make} command will still run recipes in parallel (unless its makefile also contains this target). Any prerequisites on this target are ignored. + +@findex .POSIX +@item .POSIX +@cindex POSIX-conforming mode, setting + +If @code{.POSIX} is mentioned as a target, then the makefile will be +parsed and run in POSIX-conforming mode. This does @emph{not} mean +that only POSIX-conforming makefiles will be accepted: all advanced +GNU @code{make} features are still available. Rather, this target +causes @code{make} to behave as required by POSIX in those areas +where @code{make}'s default behavior differs. + +In particular, if this target is mentioned then recipes will be +invoked as if the shell had been passed the @code{-e} flag: the first +failing command in a recipe will cause the recipe to fail immediately. @end table Any defined implicit rule suffix also counts as a special target if it @@ -3713,11 +3728,16 @@ truncated, at least). @subsection Choosing the Shell @cindex shell, choosing the @cindex @code{SHELL}, value of +@cindex @code{.SHELLFLAGS}, value of @vindex SHELL +@vindex .SHELLFLAGS The program used as the shell is taken from the variable @code{SHELL}. If this variable is not set in your makefile, the program -@file{/bin/sh} is used as the shell. +@file{/bin/sh} is used as the shell. The argument(s) passed to the +shell are taken from the variable @code{.SHELLFLAGS}. The default +value of @code{.SHELLFLAGS} is @code{-c} normally, or @code{-ec} in +POSIX-conforming mode. @cindex environment, @code{SHELL} in Unlike most variables, the variable @code{SHELL} is never set from the |