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      1 dnl GNU_MAKE_JOBSERVER
      2 dnl
      3 dnl Implement a workaround for GNU mak jobserver by adding the '+' to the
      4 dnl recipe line in Makefiles generated by automake.
      5 dnl
      6 AC_DEFUN([GNU_MAKE_JOBSERVER],[dnl
      7 m4_pattern_allow(AM_V_CCLD)
      8 touch config.status.tmp
      9 dnl Must keep the same timestamps on config.status and Makefile.
     10 if touch --reference=config.status config.status.tmp > /dev/null 2>&1; then
     11   sed '/as_fn_exit 0/i \
     12 sed -e \"s/^\t\\\(\\\$(AM_V_CCLD)\\\)/\t+ \\\1/\" Makefile > Makefile.tmp \
     13 touch --reference=Makefile Makefile.tmp \
     14 mv Makefile.tmp Makefile \
     15 ' config.status > config.status.tmp
     16   touch --reference=config.status config.status.tmp
     17   mv config.status.tmp config.status
     18   chmod +x config.status
     19   sed -e "s/^\t\(\$(AM_V_CCLD)\)/\t+ \1/" Makefile > Makefile.tmp
     20   touch --reference=Makefile Makefile.tmp
     21   mv Makefile.tmp Makefile
     22 else
     23   rm -f config.status.tmp
     24 fi])
     25