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

   1 dnl Check to find the OpenSSL headers/libraries
   2
   3 AC_DEFUN(tinc_OPENSSL,
   4 [
   5   tinc_ac_save_CPPFLAGS="$CPPFLAGS"
   6
   7   AC_ARG_WITH(openssl,
   8     AC_HELP_STRING([--with-openssl=DIR], [OpenSSL base directory, or:]),
   9     [openssl="$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(openssl-include,
  16     AC_HELP_STRING([--with-openssl-include=DIR], [OpenSSL headers directory (without trailing /openssl)]),
  17     [openssl_include="$withval"
  18      CFLAGS="$CFLAGS -I$withval"
  19      CPPFLAGS="$CPPFLAGS -I$withval"]
  20   )
  21
  22   AC_ARG_WITH(openssl-lib,
  23     AC_HELP_STRING([--with-openssl-lib=DIR], [OpenSSL library directory]),
  24     [openssl_lib="$withval"
  25      LIBS="$LIBS -L$withval"]
  26   )
  27
  28   AC_CHECK_HEADERS(openssl/evp.h openssl/rsa.h openssl/rand.h openssl/err.h openssl/sha.h openssl/pem.h,
  29     [],
  30     [AC_MSG_ERROR([OpenSSL header files not found.]); break]
  31   )
  32
  33   CPPFLAGS="$tinc_ac_save_CPPFLAGS"
  34
  35 case $host_os in
  36   *mingw*)
  37     AC_CHECK_LIB(crypto, SHA1_version,
  38       [LIBS="$LIBS -lcrypto -lgdi32"],
  39       [AC_MSG_ERROR([OpenSSL libraries not found.])]
  40     )
  41   ;;
  42   *)
  43     AC_CHECK_LIB(crypto, SHA1_version,
  44       [LIBS="$LIBS -lcrypto"],
  45       [AC_MSG_ERROR([OpenSSL libraries not found.])]
  46     )
  47
  48     AC_CHECK_FUNC(dlopen,
  49       [],
  50       [AC_CHECK_LIB(dl, dlopen,
  51         [LIBS="$LIBS -ldl"],
  52         [AC_MSG_ERROR([OpenSSL depends on libdl.]); break]
  53       )]
  54     )
  55   ;;
  56 esac
  57
  58   AC_CHECK_FUNCS([RAND_pseudo_bytes EVP_EncryptInit_ex], ,
  59     [AC_MSG_ERROR([Missing OpenSSL functionality, make sure you have installed the latest version.]); break],
  60   )
  61
  62   AC_CHECK_DECL([OpenSSL_add_all_algorithms], ,
  63     [AC_MSG_ERROR([Missing OpenSSL functionality, make sure you have installed the latest version.]); break],
  64     [#include <openssl/evp.h>]
  65   )
  66 ])