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   tinc_ac_save_CPPFLAGS="$CPPFLAGS"
   6
   7   AC_ARG_WITH(zlib,
   8     AC_HELP_STRING([--with-zlib=DIR], [zlib base directory, or:]),
   9     [zlib="$withval"
  10      CFLAGS="$CFLAGS -I$withval/include"
  11      CPPFLAGS="$CPPFLAGS -I$withval/include"
  12      LIBS="$LIBS -L$withval/lib"]
  13   )
  14
  15   AC_ARG_WITH(zlib-include,
  16     AC_HELP_STRING([--with-zlib-include=DIR], [zlib headers directory]),
  17     [zlib_include="$withval"
  18      CFLAGS="$CFLAGS -I$withval"
  19      CPPFLAGS="$CPPFLAGS -I$withval"]
  20   )
  21
  22   AC_ARG_WITH(zlib-lib,
  23     AC_HELP_STRING([--with-zlib-lib=DIR], [zlib library directory]),
  24     [zlib_lib="$withval"
  25      LIBS="$LIBS -L$withval"]
  26   )
  27
  28   AC_CHECK_HEADERS(zlib.h,
  29     [],
  30     [AC_MSG_ERROR("zlib header files not found."); break]
  31   )
  32
  33   CPPFLAGS="$tinc_ac_save_CPPFLAGS"
  34
  35   AC_CHECK_LIB(z, compress2,
  36     [LIBS="$LIBS -lz"],
  37     [AC_MSG_ERROR("zlib libraries not found.")]
  38   )
  39 ])