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

   1 dnl Check to find the OpenSSL headers/libraries
   2
   3
   4 AC_DEFUN(tinc_OPENSSL,
   5 [
   6   AC_ARG_WITH(openssl,
   7     [  --with-openssl=DIR      OpenSSL library and headers prefix],
   8     [openssl_lib="$withval/lib"
   9      openssl_include="$withval/include"]
  10   )
  11   AC_CACHE_CHECK([for openssl headers], tinc_cv_openssl_include,
  12   [
  13     AC_ARG_WITH(openssl-include,
  14       [  --with-openssl-include=DIR OpenSSL headers directory],
  15       [tinc_cv_openssl_include="$withval"],
  16       [if test "x$openssl_include" = "x" ; then
  17          tinc_cv_openssl_include="none given"
  18        else
  19          tinc_cv_openssl_include=$openssl_include
  20        fi]
  21     )
  22   ])
  23   AC_CACHE_CHECK([for openssl libraries], tinc_cv_openssl_lib,
  24   [
  25     AC_ARG_WITH(openssl-lib,
  26       [  --with-openssl-lib=DIR  OpenSSL library directory],
  27       [tinc_cv_openssl_lib="$withval"],
  28       [if test "x$openssl_lib" = "x" ; then
  29          tinc_cv_openssl_lib="none given"
  30        else
  31          tinc_cv_openssl_lib=$openssl_lib
  32        fi]
  33     )
  34   ])
  35
  36 if test "$tinc_cv_openssl_lib" != "none given" ; then
  37   LIBS="$LIBS -L$tinc_cv_openssl_lib"
  38 fi
  39 if test "$tinc_cv_openssl_include" != "none given" ; then
  40   INCLUDES="$INCLUDES -I$tinc_cv_openssl_include"
  41 fi
  42
  43 osi=none
  44 AC_CHECK_HEADERS(evp.h rsa.h,
  45 [osi=found
  46  break])
  47
  48 if test "$osi" = "none" ; then
  49   AC_CHECK_HEADERS(openssl/evp.h openssl/rsa.h,
  50   [osi=found
  51    break])
  52 fi
  53
  54
  55 libcrypto=none
  56
  57 if test "$osi" = "found" ; then
  58   AC_CHECK_LIB(crypto, SHA1_version, [
  59     libcrypto=yes
  60   ])
  61 fi
  62
  63 if test $libcrypto = none; then
  64 cat <<EOF
  65
  66 It seems like OpenSSL is not installed on this system.  But perhaps
  67 you need to supply the exact location of the headers and libraries.
  68 You can try running configure with the --with-openssl=/DIRECTORY
  69 parameter.  If you installed the headers and libraries in a different
  70 location you can use --with-openssl-include=/DIR and
  71 --with-openssl-lib=/DIR.
  72
  73 EOF
  74
  75   AC_MSG_ERROR(OpenSSL not found.)
  76
  77 else
  78   LIBS="$LIBS -lcrypto"
  79 fi
  80
  81 ])