commit c663944bb4a9040e49811037fc3984d2d15764be
Author: Kerin Millar <kfm@plushkava.net>
Date:   Sun Jan 10 22:52:26 2021 +0000

    Don't convey positional parameters to the . builtin
    
    To do so is a bashism; POSIX makes no provision for it. Fortunately, there
    is no need to begin with. The srcdir variable is already defined at the
    point that build/version.sh is sourced from the configure script and, thus,
    does not need to be passed.
    
    As version.sh is only ever sourced, that would be a valid fix in and as of
    itself. However, because version.sh has the executable bit set, there is an
    implication that the original author may have intended for it to be so; for
    testing purposes, perhaps. So as to continue to support this potential use
    case, have the script retain the ability to assign the value of $1 to
    srcdir, provided that srcdir is empty and provided that at least one
    positional parameter was specified.
    
    Signed-off-by: Kerin Millar <kfm@plushkava.net>
    Closes: https://bugs.gentoo.org/764881

diff --git a/build/version.sh b/build/version.sh
index 8cea0a3f3..614c74615 100755
--- a/build/version.sh
+++ b/build/version.sh
@@ -1,4 +1,6 @@
-srcdir="$1"
+if [ -z "$srcdir" ] && [ $# -gt 0 ]; then
+  srcdir=$1
+fi
 
 # If no git repo try to read from the existing git_version.h, for building from tarballs
 if ! test -d "${srcdir}/.git"; then
diff --git a/configure.ac b/configure.ac
index 1d8c93067..d50541f40 100644
--- a/configure.ac
+++ b/configure.ac
@@ -117,7 +117,7 @@ PKG_PROG_PKG_CONFIG([pkgconfig_required_version])
 # Developers only
 #################
 AC_MSG_CHECKING([for version])
-. $srcdir/build/version.sh "$srcdir"
+. $srcdir/build/version.sh
 AC_MSG_RESULT([$BUILD_GIT_VERSION_STRING $VERSION_SOURCE])
 
 AC_MSG_CHECKING([for build date])