/usr/share/aclocal/g-wrap.m4 is in libgwrap-runtime-dev 1.9.14-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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dnl Written by Robert Merkel <rgmerk@mira.net>
dnl Parts ripped off from guile.m4 and ORBit.m4
dnl check whether we use the old or new guile smobs
AC_DEFUN([AC_GWRAP_CHECK_GUILE],
[if test x$GUILE = x ; then
AC_PATH_PROG(GUILE, guile, no)
fi
dnl AC_MSG_WARN(guile is $GUILE)
if test "${GUILE}" = "no" ; then
AC_MSG_ERROR(g-wrap couldn't find guile.)
fi
])
dnl AM_PATH_GWRAP ([MINIMUM-VERSION, [ACTION-IF-FOUND.
dnl [ACTION-IF-NOT-FOUND]]])
dnl tests for minimum version of g-wrap.
dnl sets G_WRAP_CONFIG and GWRAP_OLD_GUILE_SMOB if needed.
AC_DEFUN([AM_PATH_GWRAP],
[dnl
dnl
dnl
AC_ARG_WITH(g-wrap-prefix,[ --with-g-wrap-prefix=PFX Prefix where g-wrap is installed (optional)],
gwrap_prefix="$withval", g_wrap_prefix="")
min_gwrap_version=ifelse([$1], , 0.9.1,$1)
if test x${GUILE} = x ; then
AC_PATH_PROG(GUILE, guile, no)
fi
dnl if prefix set, then set them explicitly
if test x${gwrap_prefix} != x ; then
G_WRAP_CONFIG=${gwrap_prefix}/bin/g-wrap-config
else
AC_PATH_PROG(G_WRAP_CONFIG, g-wrap-config, no)
if test x${G_WRAP_CONFIG} = xno ; then
CHECK_VERSION="no"
ifelse([$3], , true , [AC_MSG_WARN(g-wrap-config failed)
$3])
fi
fi
if test x$CHECK_VERSION != xno ; then
AC_MSG_CHECKING(for g-wrap - version >= ${min_gwrap_version})
gwrap_major_version=`${G_WRAP_CONFIG} --version | \
sed 's/g-wrap-config \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
gwrap_minor_version=`${G_WRAP_CONFIG} --version | \
sed 's/g-wrap-config \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
gwrap_micro_version=`${G_WRAP_CONFIG} --version | \
sed 's/g-wrap-config \([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
major_required=`echo ${min_gwrap_version} |\
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
minor_required=`echo ${min_gwrap_version} |\
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
micro_required=`echo ${min_gwrap_version} |\
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
if ${GUILE} -c "(cond ((> ${gwrap_major_version} ${major_required}) (exit 0))\
((< ${gwrap_major_version} ${major_required}) (exit 1))\
((> ${gwrap_minor_version} ${minor_required}) (exit 0))\
((< ${gwrap_minor_version} ${minor_required}) (exit 1))\
((< ${gwrap_micro_version} ${micro_required}) (exit 1))\
(else (exit 0)))" ; then
AC_MSG_RESULT(yes)
ifelse([$2], , true, [$2])
else
AC_MSG_RESULT(no)
ifelse([$3], , true , [AC_MSG_WARN(guile check failed)
$3])
fi
dnl check version
fi])
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