| 1 | dnl A function to check if the system's zlib library should be used. The |
| 2 | dnl builtin zlib dnl is used by default unless the user configured with |
| 3 | dnl --with-system-zlib. |
| 4 | |
| 5 | AC_DEFUN([AM_ZLIB], |
| 6 | [ |
| 7 | # Use the system's zlib library. |
| 8 | zlibdir="-L\$(top_builddir)/../zlib" |
| 9 | zlibinc="-I\$(top_srcdir)/../zlib" |
| 10 | AC_ARG_WITH(system-zlib, |
| 11 | [AS_HELP_STRING([--with-system-zlib], [use installed libz])], |
| 12 | if test x$with_system_zlib = xyes ; then |
| 13 | zlibdir= |
| 14 | zlibinc= |
| 15 | fi |
| 16 | ) |
| 17 | AC_SUBST(zlibdir) |
| 18 | AC_SUBST(zlibinc) |
| 19 | ]) |