m4/md5sum.m4

   1 AC_DEFUN([DX_PROG_MD5SUM], [dnl
   2 AC_CHECK_PROGS([MD5SUM], [md5sum], [false])
   3 AC_CACHE_CHECK([whether md5sum works], [dx_cv_md5sum_works], [dnl
   4         dx_cv_md5sum_works=yes
   5         # Positive test
   6         cat >conftest.md5 <<'EOF'
   7 d41d8cd98f00b204e9800998ecf8427e  /dev/null
   8 EOF
   9         if $MD5SUM -c conftest.md5 >/dev/null 2>&1; then :; else
  10                 dx_cv_md5sum_works=no
  11         fi
  12         # Negative test
  13         cat >conftest.md5 <<'EOF'
  14 d41d8cd98f00b204e9810998ecf8427e  /dev/null
  15 EOF
  16         if $MD5SUM -c conftest.md5 >/dev/null 2>&1; then
  17                 dx_cv_md5sum_works=no
  18         fi
  19         rm -f conftest.md5
  20 ])])