diff options
Diffstat (limited to 'm4/nonpic.m4')
| -rw-r--r-- | m4/nonpic.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/nonpic.m4 b/m4/nonpic.m4 new file mode 100644 index 0000000..bbb81c1 --- /dev/null +++ b/m4/nonpic.m4 @@ -0,0 +1,21 @@ +dnl AC_LIBTOOL_NON_PIC ([ACTION-IF-WORKS], [ACTION-IF-FAILS]) +dnl check for nonbuggy libtool -prefer-non-pic +AC_DEFUN([AC_LIBTOOL_NON_PIC], + [AC_MSG_CHECKING([if libtool supports -prefer-non-pic flag]) + mkdir ac_test_libtool; cd ac_test_libtool; ac_cv_libtool_non_pic=no + echo "int g (int i); static int h (int i) {return g (i);} int f (int i) {return h (i);}" >f.c + echo "int (* hook) (int) = 0; int g (int i) {if (hook) i = hook (i); return i + 1;}" >g.c + ../libtool --mode=compile $CC $CFLAGS -prefer-non-pic \ + -c f.c >/dev/null 2>&1 && \ + ../libtool --mode=compile $CC $CFLAGS -prefer-non-pic \ + -c g.c >/dev/null 2>&1 && \ + ../libtool --mode=link $CC $CFLAGS -prefer-non-pic -o libfoo.la \ + -rpath / f.lo g.lo >/dev/null 2>&1 && + ac_cv_libtool_non_pic=yes + cd ..; rm -fr ac_test_libtool; AC_MSG_RESULT([$ac_cv_libtool_non_pic]) + if test x"$ac_cv_libtool_non_pic" = x"yes"; then + ifelse([$1],[],[:],[$1]) + else + ifelse([$2],[],[:],[$2]) + fi]) + |