build/ac-macros/zlib.m4

   1 dnl
   2 dnl  SVN_LIB_Z
   3 dnl
   4 dnl  Check configure options and assign variables related to
   5 dnl  the zlib library.
   6 dnl
   7
   8 AC_DEFUN(SVN_LIB_Z,
   9 [
  10   zlib_found=no
  11
  12   AC_ARG_WITH(zlib,AS_HELP_STRING([--with-zlib=PREFIX],
  13                                   [zlib compression library]),
  14   [
  15     if test "$withval" = "yes" ; then
  16       AC_MSG_ERROR([--with-zlib requires an argument.])
  17     else
  18       AC_MSG_NOTICE([zlib library configuration])
  19       zlib_prefix=$withval
  20       save_cppflags="$CPPFLAGS"
  21       CPPFLAGS="$CPPFLAGS -I$zlib_prefix/include"
  22       AC_CHECK_HEADERS(zlib.h,[
  23         save_ldflags="$LDFLAGS"
  24         LDFLAGS="-L$zlib_prefix/lib"
  25         AC_CHECK_LIB(z, inflate, [zlib_found="yes"])
  26         LDFLAGS="$save_ldflags"
  27       ])
  28       CPPFLAGS="$save_cppflags"
  29     fi
  30   ],
  31   [
  32     AC_CHECK_HEADER(zlib.h, [
  33       AC_CHECK_LIB(z, inflate, [zlib_found="builtin"])
  34     ])
  35   ])
  36
  37   if test "$zlib_found" = "no"; then
  38     AC_MSG_ERROR([subversion requires zlib])
  39   fi
  40
  41   if test "$zlib_found" = "yes"; then
  42     SVN_ZLIB_PREFIX="$zlib_prefix"
  43     SVN_ZLIB_INCLUDES="-I$zlib_prefix/include"
  44     LDFLAGS="-L$zlib_prefix/lib"
  45   fi
  46
  47   SVN_ZLIB_LIBS="-lz"
  48
  49   AC_SUBST(SVN_ZLIB_PREFIX)
  50   AC_SUBST(SVN_ZLIB_INCLUDES)
  51   AC_SUBST(SVN_ZLIB_LIBS)
  52 ])