tinc-vpn.org Git - tinc/blob - m4/zlib.m4

   1 dnl Check to find the zlib headers/libraries
   2
   3 AC_DEFUN([tinc_ZLIB],
   4 [
   5   AC_ARG_ENABLE([zlib],
   6     AS_HELP_STRING([--disable-zlib], [disable zlib compression support]))
   7   AS_IF([test "x$enable_zlib" != "xno"], [
   8   AC_DEFINE(HAVE_ZLIB, 1, [have zlib compression support])
   9     AC_ARG_WITH(zlib,
  10       AS_HELP_STRING([--with-zlib=DIR], [zlib base directory, or:]),
  11       [zlib="$withval"
  12        CPPFLAGS="$CPPFLAGS -I$withval/include"
  13        LDFLAGS="$LDFLAGS -L$withval/lib"]
  14     )
  15
  16     AC_ARG_WITH(zlib-include,
  17       AS_HELP_STRING([--with-zlib-include=DIR], [zlib headers directory]),
  18       [zlib_include="$withval"
  19        CPPFLAGS="$CPPFLAGS -I$withval"]
  20     )
  21
  22     AC_ARG_WITH(zlib-lib,
  23       AS_HELP_STRING([--with-zlib-lib=DIR], [zlib library directory]),
  24       [zlib_lib="$withval"
  25        LDFLAGS="$LDFLAGS -L$withval"]
  26     )
  27
  28     AC_CHECK_HEADERS(zlib.h,
  29       [],
  30       [AC_MSG_ERROR("zlib header files not found."); break]
  31     )
  32
  33     AC_CHECK_LIB(z, compress2,
  34       [LIBS="$LIBS -lz"],
  35       [AC_MSG_ERROR("zlib libraries not found.")]
  36     )
  37   ])
  38 ])