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   CFLAGS="$CFLAGS -I$tinc_cv_openssl_include"
  41 fi
  42
  43 osi=found
  44 AC_CHECK_HEADERS(evp.h rsa.h rand.h err.h sha.h pem.h,
  45 [], [osi=none; break])
  46
  47 if test "$osi" = "none" ; then
  48   osi=found
  49   AC_CHECK_HEADERS(openssl/evp.h openssl/rsa.h openssl/rand.h openssl/err.h openssl/sha.h openssl/pem.h,
  50   [], [osi=none; break])
  51 fi
  52
  53
  54 libcrypto=none
  55
  56 if test "$osi" = "found" ; then
  57   AC_CHECK_LIB(crypto, SHA1_version, [
  58     libcrypto=yes
  59   ])
  60 fi
  61
  62 if test $libcrypto = none; then
  63 cat <<EOF
  64
  65 It seems like OpenSSL is not installed on this system.  But perhaps
  66 you need to supply the exact location of the headers and libraries.
  67 You can try running configure with the --with-openssl=/DIRECTORY
  68 parameter.  If you installed the headers and libraries in a different
  69 location you can use --with-openssl-include=/DIR and
  70 --with-openssl-lib=/DIR.
  71
  72 EOF
  73
  74   AC_MSG_ERROR(OpenSSL not found.)
  75
  76 else
  77   LIBS="$LIBS -lcrypto"
  78 fi
  79
  80 ])