see
https://lintian.debian.org/tags/autotools-pkg-config-macro-not-cross-compilation-safe.html
AC_CHECK_PROG(HAVE_GTK_ICON_CACHE, gtk-update-icon-cache, yes, no)
AM_CONDITIONAL(UPDATE_GTK_ICON_CACHE, test x"$HAVE_GTK_ICON_CACHE" = xyes)
AC_CHECK_PROG(HAVE_GTK_ICON_CACHE, gtk-update-icon-cache, yes, no)
AM_CONDITIONAL(UPDATE_GTK_ICON_CACHE, test x"$HAVE_GTK_ICON_CACHE" = xyes)
-AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-if test x$PKG_CONFIG = xno ; then
- AC_MSG_ERROR([*** pkg-config not found. See http://www.freedesktop.org/software/pkgconfig/])
-fi
dnl libtool versioning
LT_RELEASE=$MAJOR_VERSION.$MINOR_VERSION
dnl libtool versioning
LT_RELEASE=$MAJOR_VERSION.$MINOR_VERSION
dnl check for glib
PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.28 gmodule-2.0 >= 2.28 gobject-2.0 >= 2.28 gthread-2.0 >= 2.28)
dnl check for glib
PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.28 gmodule-2.0 >= 2.28 gobject-2.0 >= 2.28 gthread-2.0 >= 2.28)
-GLIB_GENMARSHAL=`pkg-config --variable=glib_genmarshal glib-2.0`
+GLIB_GENMARSHAL=`$PKG_CONFIG --variable=glib_genmarshal glib-2.0`
AC_SUBST(GLIB_GENMARSHAL)
AC_SUBST(GLIB_CFLAGS)
AC_SUBST(GLIB_GENMARSHAL)
AC_SUBST(GLIB_CFLAGS)