We can't link properly to libgit2 without pkg-config telling
us which libraries and headers to use.
die 'PERL_INLINE_DIRECTORY not defined';
my $f = "$inline_dir/.public-inbox.lock";
open $lockfh, '>', $f or die "failed to open $f: $!\n";
- my $pc = which($ENV{PKG_CONFIG} // 'pkg-config');
+ my $pc = which($ENV{PKG_CONFIG} // 'pkg-config') //
+ die "pkg-config missing for libgit2";
my ($dir) = (__FILE__ =~ m!\A(.+?)/[^/]+\z!);
my $rdr = {};
open $rdr->{2}, '>', '/dev/null' or die "open /dev/null: $!";