[bug #62162] patsubst not working in prerequisites under .SECONDEXPANSION

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?62162>

                 Summary: patsubst not working in prerequisites under
.SECONDEXPANSION
                 Project: make
            Submitted by: None
            Submitted on: Thu 10 Mar 2022 10:06:34 AM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 4.3
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

For some reason `patsubst` function doesn't do its work in the following
snippet. 

```
prereq_files = 1-prereq 2-prereq
all: prefix.stem.r1.ext

files = $(foreach file,$(prereq_files),prefix.stem.r$(patsubst
%-prereq,%,$(file)).ext)
# Files is prefix.stem.r1.ext prefix.stem.r2.ext
$(files) : %.ext : $$(patsubst r%,%,$$(lastword $$(subst .stem.,
,$$*)))-prereq
        cat $< > $@
```

I get `make: *** No rule to make target 'r1-prereq'` error, when trying to
make `prefix.stem.r1.ext` which by design should depend on `1-prereq`.
patsubst doesn't do its job and makes it depend on r1-prereq which is
non-existent. Weirdly if I just use $(subst r,,<...>) everything is fine. 

Any ideas?
-Mikhail



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File Attachments:


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Date: Thu 10 Mar 2022 10:06:34 AM UTC  Name: Makefile  Size: 253B   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=52975>

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