Avoid gratuitous library dependencies linking gnulib.

[dxcommon.git] / scripts / fix-gnulib.pl

diff --git a/scripts/fix-gnulib.pl b/scripts/fix-gnulib.pl
index 17163c7e24cc15d436bd5dd593c7629212bc5963..834fb7a2e6fe0f0b3f4a11c7eaa11d3fb800422c 100755 (executable)
--- a/scripts/fix-gnulib.pl
+++ b/scripts/fix-gnulib.pl
@@ -111,6 +111,14 @@ EOF
        # useful for non-recursive builds.  Strip them out.
        drop if (/^(AM_CPPFLAGS|AM_CFLAGS)/);
 
+       # Library dependencies are added automatically to libgnu.la by
+       # gnulib-tool.  Unfortunately, this means that everything linking
+       # against libgnu.la is forced to pull in the same deps, even if they're
+       # unneeded.  Furthermore, a libtool linker flag reordering bug prevents
+       # --as-needed from stripping out the useless deps, so it's better to
+       # handle them all manually.
+       drop if (/LDFLAGS/);
+
        # Rewrite automake hook targets to be more generic.
        if (s/^(.*)-local:/\1-gnulib:/) {
                print ".PHONY: $1-gnulib\n";
@@ -174,9 +182,21 @@ if (defined $m4output) {
 
        open(M4OUT, '>', $m4output) or die "$m4output: $!\n";
 
-       print M4OUT "dnl This file was generated by fix-gnulib.pl\n";
-       print M4OUT "AC_DEFUN([$m4macro], [dnl\n";
+       print M4OUT <<EOF;
+dnl This file was generated by fix-gnulib.pl
+dnl
+dnl Usage: DX_FIX_GNULIB([symbol-prefix])
+dnl   where symbol-prefix is the application-specific symbol prefix to apply
+dnl   to Gnulib's symbols.  Defaults to \${PACKAGE}__.
+dnl   top-level source directory; e.g. lib.
+AC_DEFUN([$m4macro], [dnl
+EOF
        print M4OUT <<'EOF';
+GLSRC=lib
+GLSYM_PREFIX='ifelse([$1], [], [${PACKAGE}__], [$1])'
+AC_SUBST([GLSRC])
+AC_SUBST([GLSYM_PREFIX])
+
 m4_foreach([gl_objvar], [[gl_LIBOBJS], [gl_LTLIBOBJS]], [dnl
 set x $gl_objvar; shift
 gl_objvar=
@@ -185,7 +205,6 @@ while test ${#} -gt 0; do
 done
 ])
 EOF
-
        foreach (@vars) {
                print M4OUT "$_=\${$_:+lib/\$$_}\n";
        }