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Reset GNUMAKEFLAGS after parsing.

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If we don't do this we'll continually add flags on recursion.  This
is mainly for users to set in their environment before invoking make.
This commit is contained in:
Paul Smith 2013-09-29 13:15:00 -04:00
parent e8122ecb5d
commit 543521cd47
6 changed files with 52 additions and 8 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2013-09-29 Paul Smith <psmith@gnu.org>
* main.c (main): Clear GNUMAKEFLAGS after parsing, to avoid
proliferation of options.
* NEWS: Document it.
* doc/make.texi (Options/Recursion): Ditto.
2013-09-23 Eli Zaretskii <eliz@gnu.org>
* w32/compat/posixfcn.c: Fix the forgotten OUTPUT_SYNC conditional.

9
NEWS
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@ -73,7 +73,8 @@ http://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=101&set
* New variable: $(GNUMAKEFLAGS) will be parsed for make flags, just like
MAKEFLAGS is. It can be set in the environment or the makefile, containing
GNU make-specific flags to allow your makefile to be portable to other
versions of make. GNU make never sets or modifies GNUMAKEFLAGS.
versions of make. Once this variable is parsed, GNU make will set it to the
empty string so that flags will not be duplicated on recursion.
* New variable: `MAKE_HOST' gives the name of the host architecture
make was compiled for. This is the same value you see after 'Built for'
@ -81,8 +82,10 @@ http://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=101&set
* Behavior of MAKEFLAGS and MFLAGS is more rigorously defined. All simple
flags are grouped together in the first word of MAKEFLAGS. No options that
accept arguments appear there. If no simple flags are present MAKEFLAGS
begins with a space. MFLAGS never begins with "- ".
accept arguments appear in the first word. If no simple flags are present
MAKEFLAGS begins with a space. Flags with both short and long versions
always use the short versions in MAKEFLAGS. Flags are listed in
alphabetical order using ASCII ordering. MFLAGS never begins with "- ".
* Setting the -r and -R options in MAKEFLAGS inside a makefile now works as
expected, removing all built-in rules and variables, respectively.

15
doc/make.texi
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@ -4808,10 +4808,17 @@ to GNU @code{make}, and hence do not want to add GNU
@code{make}-specific flags to the @code{MAKEFLAGS} variable, you can
add them to the @code{GNUMAKEFLAGS} variable instead. This variable
is parsed just before @code{MAKEFLAGS}, in the same way as
@code{MAKEFLAGS}. Note, however, that when @code{make} constructs
@code{MAKEFLAGS} to pass to a recursive @code{make} it will include
all flags. GNU @code{make} never sets the @code{GNUMAKEFLAGS}
variable itself.
@code{MAKEFLAGS}. When @code{make} constructs @code{MAKEFLAGS} to
pass to a recursive @code{make} it will include all flags, even those
taken from @code{GNUMAKEFLAGS}. As a result, after parsing
@code{GNUMAKEFLAGS} GNU @code{make} sets this variable to the empty
string to avoid duplicating flags during recursion.
It's best to use @code{GNUMAKEFLAGS} only with flags which won't
materially change the behavior of your makefiles. If your makefiles
require GNU make anyway then simply use @code{MAKEFLAGS}. Flags such
as @samp{--no-print-directory} or @samp{--output-sync} may be
appropriate for @code{GNUMAKEFLAGS}.
@node -w Option, , Options/Recursion, Recursion
@subsection The @samp{--print-directory} Option

10
main.c
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@ -1396,6 +1396,10 @@ main (int argc, char **argv, char **envp)
/* Decode the switches. */
decode_env_switches (STRING_SIZE_TUPLE ("GNUMAKEFLAGS"));
/* Clear GNUMAKEFLAGS to avoid duplication. */
define_variable_cname ("GNUMAKEFLAGS", "", o_env, 0);
decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
/* In output sync mode we need to sync any output generated by reading the
@ -1931,12 +1935,16 @@ main (int argc, char **argv, char **envp)
/* Decode switches again, for variables set by the makefile. */
decode_env_switches (STRING_SIZE_TUPLE ("GNUMAKEFLAGS"));
/* Clear GNUMAKEFLAGS to avoid duplication. */
define_variable_cname ("GNUMAKEFLAGS", "", o_override, 0);
decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
#if 0
decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS"));
#endif
/* Reset in case the switches changed our minds. */
/* Reset in case the switches changed our mind. */
syncing = (output_sync == OUTPUT_SYNC_LINE
|| output_sync == OUTPUT_SYNC_TARGET);

5
tests/ChangeLog
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@ -1,3 +1,8 @@
2013-09-29 Paul Smith <psmith@gnu.org>
* scripts/variables/GNUMAKEFLAGS: Verify that GNUMAKEFLAGS is
cleared and options are not duplicated.
2013-09-23 Paul Smith <psmith@gnu.org>
* scripts/options/print-directory: Rename dash-w to

14
tests/scripts/variables/GNUMAKEFLAGS
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@ -23,4 +23,18 @@ all: ; @echo $(MAKEFLAGS)
echo erR --trace --no-print-directory
erR --trace --no-print-directory");
# Verify that re-exec / recursion doesn't duplicate flags from GNUMAKEFLAGS
$extraENV{GNUMAKEFLAGS} = '-I/tmp -Oline';
run_make_test(q!
recurse: ; @echo $@; echo MAKEFLAGS = $$MAKEFLAGS; echo GNUMAKEFLAGS = $$GNUMAKEFLAGS; #MAKEPATH# -f #MAKEFILE# all
all: ; @echo $@; echo MAKEFLAGS = $$MAKEFLAGS; echo GNUMAKEFLAGS = $$GNUMAKEFLAGS
-include x.mk
x.mk: ; @echo $@; echo MAKEFLAGS = $$MAKEFLAGS; echo GNUMAKEFLAGS = $$GNUMAKEFLAGS; echo > $@
!,
"", "x.mk\nMAKEFLAGS = -I/tmp -Oline\nGNUMAKEFLAGS =\nrecurse\nMAKEFLAGS = -I/tmp -Oline\nGNUMAKEFLAGS =\n#MAKE#[1]: Entering directory '#PWD#'\nall\nMAKEFLAGS = w -I/tmp -Oline\nGNUMAKEFLAGS =\n#MAKE#[1]: Leaving directory '#PWD#'\n");
unlink('x.mk');
1;