Package: pkgconf
Version: 1.8.1-1
Severity: normal

Hello,

this was surprising behaviour for which I cannot find documentation,
which I discovered by accident by having a $ARCH file in my build
directory:

If invoking as pkg-config, everything is fine:

  $ rm x86_64-linux-gnu 
  $ pkg-config --cflags libxml-2.0
  -I/usr/include/libxml2 
  $ echo foo > x86_64-linux-gnu
  $ pkg-config --cflags libxml-2.0
  -I/usr/include/libxml2 

If invoking as /usr/bin/x86_64-linux-gnu-pkg-config instead, a file with
called x86_64-linux-gnu gets parsed and influences the results:

  $ rm x86_64-linux-gnu
  $ /usr/bin/x86_64-linux-gnu-pkg-config --cflags libxml-2.0
  -I/usr/include/libxml2 
  $ echo foo > x86_64-linux-gnu
  $ /usr/bin/x86_64-linux-gnu-pkg-config --cflags libxml-2.0
  Package libxml-2.0 was not found in the pkg-config search path.
  Perhaps you should add the directory containing `libxml-2.0.pc'
  to the PKG_CONFIG_PATH environment variable
  Package 'libxml-2.0', required by 'virtual:world', not found

It may be expected behaviour, or it may be something unintended that
leads to unexpected code execution. I cannot find it documented in man
pkg-config(1) or man pc(5) and I cannot tell what it's supposed to do,
so I'll limit myself to reporting the surprising behaviour.

It was pretty tricky to debug why this source which included such a file
used to build before bookworm and in bookworm stopped being unable to
find its dependencies


Thanks,

Enrico

-- System Information:
Debian Release: 12.1
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.1.0-9-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_IE:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages pkgconf depends on:
ii  pkgconf-bin  1.8.1-1

pkgconf recommends no packages.

pkgconf suggests no packages.

-- no debconf information

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