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Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set

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  Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set Vincent Lefevre <vincent@vinc17.net> - 2025-02-06 00:50 +0100
    Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set Vincent Lefevre <vincent@vinc17.net> - 2025-02-06 01:20 +0100
    Bug#1095260: [pkg-gnupg-maint] Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set NIIBE Yutaka <gniibe@fsij.org> - 2025-02-06 02:30 +0100

#1231939 — Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set

Package: libgpg-error-dev
Version: 1.51-3
Severity: important

When the PKG_CONFIG_PATH environment variable is set,
"gpgrt-config --modversion gpgme" fails:

cventin:~> echo $PKG_CONFIG_PATH
/home/vlefevre/opt/tcc/lib/pkgconfig
cventin:~> gpgrt-config --modversion gpgme
Can't find gpgme.pc
cventin:~[1]>

No problems with pkg-config:

cventin:~> pkg-config --path gpgme
/usr/lib/x86_64-linux-gnu/pkgconfig/gpgme.pc

The cause is PKG_CONFIG_PATH, because if I unset it,
gpgrt-config works fine:

cventin:~> env -u PKG_CONFIG_PATH gpgrt-config --modversion gpgme
1.24.1

(The consequence was I got Mutt built without GPGME support on this
machine.)

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.11.10-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libgpg-error-dev depends on:
ii  libgpg-error0  1.51-3

libgpg-error-dev recommends no packages.

libgpg-error-dev suggests no packages.

-- no debconf information

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)

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#1231941

Control: tags -1 upstream

On 2025-02-06 00:38:29 +0100, Vincent Lefevre wrote:
> When the PKG_CONFIG_PATH environment variable is set,
> "gpgrt-config --modversion gpgme" fails:
> 
> cventin:~> echo $PKG_CONFIG_PATH
> /home/vlefevre/opt/tcc/lib/pkgconfig
> cventin:~> gpgrt-config --modversion gpgme
> Can't find gpgme.pc
> cventin:~[1]>

This is an upstream bug:

  if [ -z "$PKG_CONFIG_LIBDIR" ]; then
    if [ -z "$PKG_CONFIG_PATH" ]; then
      # It used to fail as:
      #
      # echo "Please use --libdir=LIBDIR option or set PKG_CONFIG_LIBDIR" 1>&2
      # echo "Or set PKG_CONFIG_PATH" 1>&2
      #
      # Now, we try a fallback.
      determine_gpgrt_libdir
      PKG_CONFIG_PATH="${gpgrt_libdir}/pkgconfig"
    fi
  else
    # PKG_CONFIG_LIBDIR is available here
    # Modify PKG_CONFIG_PATH, prepending PKG_CONFIG_LIBDIR
    PKG_CONFIG_PATH="$PKG_CONFIG_LIBDIR${PKG_CONFIG_PATH:+:}$PKG_CONFIG_PATH"
  fi

I suppose that if $PKG_CONFIG_LIBDIR is empty, ${gpgrt_libdir}/pkgconfig
should be prepended whether $PKG_CONFIG_PATH is empty or not. Something
like

  if [ -z "$PKG_CONFIG_LIBDIR" ]; then
    determine_gpgrt_libdir
    PKG_CONFIG_PATH="${gpgrt_libdir}/pkgconfig${PKG_CONFIG_PATH:+:}$PKG_CONFIG_PATH"
  else
    # PKG_CONFIG_LIBDIR is available here
    # Modify PKG_CONFIG_PATH, prepending PKG_CONFIG_LIBDIR
    PKG_CONFIG_PATH="$PKG_CONFIG_LIBDIR${PKG_CONFIG_PATH:+:}$PKG_CONFIG_PATH"
  fi

(not tested).

If this is not sufficient, the case where $PKG_CONFIG_PATH is unset
is probably buggy too.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)

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#1231944 — Bug#1095260: [pkg-gnupg-maint] Bug#1095260: libgpg-error-dev: can't find gpgme.pc when PKG_CONFIG_PATH is set

Vincent Lefevre <vincent@vinc17.net> wrote:
> When the PKG_CONFIG_PATH environment variable is set,
> "gpgrt-config --modversion gpgme" fails:

Thank you for your report.

I confirmed the issue, identified a bug, and fixed in upstream as the
commit of:

	dbf1e0dc47229384d59cb19084de39a855e5c871

I think that problem has now gone in master.  1.52 will be released
with the fix.
-- 

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