1 ###############################################################################

2 ## $Id: zlib.m4,v 1.1 2003/09/17 22:26:07 hipnod Exp $

3 ###############################################################################

4

5 dnl

6 dnl Check for zlib in some bizarre locations...

7 dnl

8 AC_DEFUN([GIFT_PLUGIN_CHECK_ZLIB],

9 [

10 # set the minimum ZLIB_VER we're willing to link against...

11 ZLIB_VER=1.1.4

12

13 # for some reason Darwin has a 1.1.3 version with the 1.1.4 security fix

14 # applied backwards...

15 case "${host}" in

16 *-*-darwin* )

17 ZLIB_VER=1.1.3

18 ;;

19 esac

20

21 if test x"$OPT_ZLIB" = xno; then

22 zlib_ok=no

23 else

24 ZLIB_DIRS="$OPT_ZLIB /usr /usr/local /sw"

25 for ZLIB_DIR in $ZLIB_DIRS;

26 do

27 LIBS_SAVE="$LIBS"

28 CPPFLAGS_SAVE="$CPPFLAGS"

29 LIBS="$LIBS -L${ZLIB_DIR}/lib"

30 CPPFLAGS="$CPPFLAGS -I${ZLIB_DIR}/include"

31 AC_CACHE_CHECK(

32 [for zlib version ${ZLIB_VER}+ in ${ZLIB_DIR}],

33 zlib_ok,

34 AC_TRY_RUN(

35 [#include <zlib.h>

36 #include <string.h>

37 void main() {

38 exit(strcmp(ZLIB_VERSION, "${ZLIB_VER}") < 0);

39 }

40 ],

41 [zlib_ok=yes],

42 [zlib_ok=no],

43 [zlib_ok=yes]))

44

45 if test "$zlib_ok" != "no"; then

46 AC_CHECK_FUNC(gzread, , AC_CHECK_LIB(z, gzread))

47 AC_DEFINE(USE_ZLIB)

48 AC_SUBST(USE_ZLIB)

49 break

50 fi

51 LIBS="$LIBS_SAVE"

52 CPPFLAGS="$CPPFLAGS_SAVE"

53 done

54

55 if test "$zlib_ok" = "no"; then

56 AC_MSG_ERROR([

57 NOTE: The zlib compression library version ${ZLIB_VER} or greater was not found

58 on your system.

59

60 If zlib ${ZLIB_VER}+ is not installed, install it.

61 ])

62 fi

63 fi

64 ])