Thank you. It works nicely, with the basic test:
$ ./make -f -
.ALLOW_RECURSIVE_CHAINS:
%/dir: %; # mkdir $@
target/dir/dir/file: target/dir/dir; # touch $@
target:; # mkdir $@
# mkdir target
# mkdir target/dir
# mkdir target/dir/dir
# touch target/dir/dir/file
It does perfectly what the aim was. The original use case is rather unusual:
Some of the build steps cannot be automated and instead of having text files
with manual steps laying here and there I wanted to show the manual
instructions to the user directly from make. Further, thought that steps like
'1. ..., 2... etc.' are actually 'ordinal' targets in and each later step is
dependent on the earlier one. (Also it would be easy to extend in the future,
no worries about step re-numbering.) And to avoid potential name collisions
(e.g. the user have to do more than once 'Next') and to accommodate sub-steps
with arbitrary order ('Location' and 'Virtual machine name' in the attached
example) let's use some 'growing path construct' as target naming convention.
(Maybe this is an overkill but I like it and I believe it will be easier to
maintain these tasks as 'makefile'. It is not aimed to be used excessively,
only for some tasks which are unfortunately manual.)
Thank you. I would be happy to see the new '.ALLOW_RECURSIVE_CHAINS' target in
the next GNU 'make' release and / or committed to master before.
---
Here is the 'makefile' for the above mentioned user case. It waits for the
'virtual_machine_name.vmx' file to be created manually, for this test it times
out after 10 seconds, hence the 'Error 124':
$ ./make -s -f ~/makefile2 virtual_machine_name.vmx
vmware_workstation_16_player
VMware Workstation
16 Player
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine.../file/.../player
Player
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine.../file
File
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine...
[-New Virtual Machine...-]
{+New virtual machine...+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next/.../i_will_install_the_operating_system_later./install_20_from_3a_
Install from:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next/.../i_will_install_the_operating_system_later.
I will install the operating system later.
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next
[-Next >-]
{+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other/guest_operating_system
Guest
operating system
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version/other
Other
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier/version
Version
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next/.../freebsd_version_10_and_earlier
FreeBSD version 10 and earlier
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../next
[-Next >-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../c_3a__5c_cygwin64_5c_home_5c_user_5c_/location_3a_
Location:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../c_3a__5c_cygwin64_5c_home_5c_user_5c_
C:\cygwin64\home\User\
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../virtual_machine_name/virtual_20_machine_20_name_3a_
Virtual machine name:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next/.../virtual_machine_name
virtual_machine_name
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next
[-Next >-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next
[-Next >-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware...
[-Customize
Hardware...-] {+Customize hardware...+}
virtual_machine_name.vmx/finish/close/.../512_mib/memory_20_for_20_this_20_virtual_20_machine_3a_/memory
Memory
virtual_machine_name.vmx/finish/close/.../512_mib/memory_20_for_20_this_20_virtual_20_machine_3a_
Memory for this virtual machine:
virtual_machine_name.vmx/finish/close/.../512_mib
[-512 MB-] {+512
MiB+}
virtual_machine_name.vmx/finish/close
Close
virtual_machine_name.vmx/finish
Finish
virtual_machine_name.vmx
........make: *** [/home/User/makefile2:228: virtual_machine_name.vmx] Error 124
---
$ ./make -s -f ~/makefile virtual_machine_name.vmx > stdout; ./make -s -f
~/makefile2 virtual_machine_name.vmx > stdout2; git diff --no-index --word-diff
--word-diff-regex=. stdout stdout2; git diff --no-index --word-diff
--word-diff-regex=. ~/makefile ~/makefile2
make: *** [/home/User/makefile:245: virtual_machine_name.vmx] Error 124
make: *** [/home/User/makefile2:228: virtual_machine_name.vmx] Error 124
diff --git a/stdout b/stdout2
index 06132d03..98acda3c 100644
--- a/stdout
+++ b/stdout2
@@ -1,20 +1,20 @@
vmware_workstation_16_player
VMware Workstation
16 Player
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine.../file/.../player
{+ +}Player
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine.../file
{+ +}File
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later./install_20_from_3a_/new_virtual_machine...
{+ +}[-New Virtual
Machine...-] {+New virtual machine...+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later./install_20_from_3a_
{+
+}Install from:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later.
{+ +}I will install the operating system later.
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system/next[-4-]{+
+}
[-Next >-]
{+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other/guest_operating_system
{+ +}Guest
operating system
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version/other
{+ +}Other
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier/version
{+ +}Version
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier
{+ +}FreeBSD version 10 and earlier
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../next[-3-]{+
+}
[-Next >-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../c_3a__5c_cygwin64_5c_home_5c_user_5c_/location_3a_
{+ +}Location:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../c_3a__5c_cygwin64_5c_home_5c_user_5c_
{+ +}C:\cygwin64\home\User\
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../virtual_machine_name/virtual_20_machine_20_name_3a_
{+ +}Virtual machine name:
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]/.../virtual_machine_name
{+ +}virtual_machine_name
virtual_machine_name.vmx/finish/close/customize_hardware.../next/.../next[-2-]{+
+}
[-Next
>-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware.../next
[-Next >-] {+Next+}
virtual_machine_name.vmx/finish/close/customize_hardware...
[-Customize
Hardware...-] {+Customize hardware...+}
virtual_machine_name.vmx/finish/close/.../512_mib/memory_20_for_20_this_20_virtual_20_machine_3a_/memory
Memory
diff --git a/home/User/makefile b/home/User/makefile2
index 865b8470..dff93180 100755
--- a/home/User/makefile
+++ b/home/User/makefile2
@@ -1,3 +1,4 @@
{+.ALLOW_RECURSIVE_CHAINS:+}
.SECONDARY:
%/.../512_mib/memory_20_for_20_this_20_virtual_20_machine_3a_/memory/...: \
@@ -12,7 +13,7 @@
printf '%.300s\t%s\n' $@ "$$(cat names/512_mib)" | expand -t 1,301
%/c_3a__5c_cygwin64_5c_home_5c_user_5c_/location_3a_: \
%/next[-3-] \
names/location_3a_ \
printf '%.300s\t%s\n' $@ "$$(cat names/location_3a_)" | expand -t 1,301
@@ -29,19 +30,19 @@
printf '%.300s\t%s\n' $@ "$$(cat names/close)" | expand -t 1,301
%/customize_hardware.../next/.../next[-2-]/...: \
%/customize_hardware.../next/.../next[-2-]/.../c_3a__5c_cygwin64_5c_home_5c_user_5c_
\
%/customize_hardware.../next/.../next[-2-]/.../virtual_machine_name \
:
%/customize_hardware.../next/.../next[-2-]/.../next[-3-]/...: \
%/customize_hardware.../next/.../next[-2-]/.../next[-3-]/.../freebsd_version_10_and_earlier
\
:
%/customize_hardware.../next/...: \
%/customize_hardware.../next/.../next[-2-] \
:
@@ -69,13 +70,13 @@
printf '%.300s\t%s\n' $@ "$$(cat names/freebsd_version_10_and_earlier)"
| expand -t 1,301
%/guest_operating_system/next[-4-]/...: \
%/guest_operating_system/next[-4-]/.../i_will_install_the_operating_system_later.
\
:
%/guest_operating_system: \
%/guest_operating_system/next[-4-] \
names/guest_operating_system \
printf '%.300s\t%s\n' $@ "$$(cat names/guest_operating_system)" |
expand -t 1,301
@@ -115,24 +116,6 @@
printf '%.300s\t%s\n' $@ "$$(cat names/new_virtual_machine...)" |
expand -t 1,301
[-%/next2: \-]
[- %/next2/... \-]
[- names/next \-]
[- printf '%.300s\t%s\n' $@ "$$(cat names/next)" | expand -t 1,301-]
[-%/next3: \-]
[- %/next3/... \-]
[- names/next \-]
[- printf '%.300s\t%s\n' $@ "$$(cat names/next)" | expand -t 1,301-]
[-%/next4: \-]
[- %/next4/... \-]
[- names/next \-]
[- printf '%.300s\t%s\n' $@ "$$(cat names/next)" | expand -t 1,301-]
%/next: \
%/next/... \
names/next \
@@ -158,7 +141,7 @@
printf '%.300s\t%s\n' $@ "$$(cat names/version)" | expand -t 1,301
%/virtual_machine_name/virtual_20_machine_20_name_3a_: \
%/next[-3-] \
names/virtual_20_machine_20_name_3a_ \
printf '%.300s\t%s\n' $@ "$$(cat names/virtual_20_machine_20_name_3a_)"
| expand -t 1,301
---
$ base64 ~/makefile
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---
$ base64 ~/makefile2
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bmQgLXQgMSwzMDEK
On Friday, November 8th, 2024 at 5:41 AM, Dmitry Goncharov
<dgoncha...@users.sf.net> wrote:
> On Thu, Nov 7, 2024 at 3:49 AM WaitronCharm via Bug reports and
> discussion for GNU make bug-make@gnu.org wrote:
>
> > > all: hello.tsk
> > > %.tsk: %.o; $(info hello.tsk)
> > > %.o: %.c %.tsk; $(info hello.c)
> > > Wouldn't this result anyway in a cyclic graph due to '%.tsk'?
>
>
> This is a legal makefile. Make drops the circular dependency and
> successfully builds hello.tsk.
>
> > What I meant in my earlier email is that protecting from infinite recursion
> > should not happen by forbidding recursion completely.
>
>
> As i said earlier, the authors probably had other reasons.
> Given that we mostly deal with files like hello.o, rather than
> hello.o.o, one obvious question is why do you even want to do this?
>
> > Would this be then (1) check out the code, (2) add a new special target,
> > (3) instead of 'break' simply continue around line 'Avoiding implicit rule
> > recursion for rule', (4) compile and see the result?
>
>
> (5) add tests, (6) update the manual.
>
> > What I meant by complications is whether the implementation uses the
> > pattern rule name as some 'identifier' in any structures and multiples of
> > the same pattern rule name (per target) would cause mess. (New 'identifier'
> > could change to the combination of pattern rule name and instance no. of
> > applying that rule).
>
>
> No.
>
> > I am not familiar with the 'make' code and did not look into it yet. Want
> > to just estimate how much work would this be.
>
>
> i posted a diff below that you can use. This diff achieves the
> behavior you desire. You can see, the change is small. The hard part
> here, is not the size of the changeset. The hard part is to convince
> yourself that, with this change, make still does the minimal necessary
> amount of implicit searches.
>
> regards, Dmitry
>
> diff --git a/src/file.c b/src/file.c index 6f816c8a..c8017e34 100644
> --- a/src/file.c +++ b/src/file.c @@ -911,6 +911,10 @@ snap_deps
> (void) d2->wait_here = 1; } + f = lookup_file
>
> (".ALLOW_RECURSIVE_CHAINS"); + if (f != 0 && f->is_target) +
>
> allow_recursive_chains = 1; + { struct dep *prereqs =
> expand_extra_prereqs (lookup_variable
> (STRING_SIZE_TUPLE(".EXTRA_PREREQS"))); diff --git a/src/implicit.c
> b/src/implicit.c index 134e3fef..2bd2b90e 100644 --- a/src/implicit.c
> +++ b/src/implicit.c @@ -297,7 +297,7 @@ pattern_search (struct file
> file, int archive, / If this rule is in use by a parent
> pattern_search, don't use it here. */ - if (rule->in_use) + if
>
> (rule->in_use && !allow_recursive_chains) { DBS (DB_IMPLICIT,
>
> (_("Avoiding implicit rule recursion for rule '%s'.\n"), diff --git
> a/src/main.c b/src/main.c index 78084d09..5333df5f 100644 ---
> a/src/main.c +++ b/src/main.c @@ -193,6 +193,10 @@ static int
> old_builtin_variables_flag; int export_all_variables = 0; +/* Nonzero
> means a chain of implicit rules can have a rule multiple times. / +
> +int allow_recursive_chains; + / Nonzero means keep going even if
> remaking some file fails (-k). */ int keep_going_flag; diff --git
> a/src/makeint.h b/src/makeint.h index 61c78229..27a269ed 100644 ---
> a/src/makeint.h +++ b/src/makeint.h @@ -736,6 +736,7 @@ extern int
> print_version_flag, check_symlink_flag, posix_pedantic; extern int
> not_parallel, second_expansion, clock_skew_detected; extern int
> rebuilding_makefiles, one_shell, output_sync, verify_flag; extern int
> export_all_variables; +extern int allow_recursive_chains; extern
> unsigned long command_count; extern const char *default_shell;
