m4/openssl.m4

   1 dnl Check to find the OpenSSL headers/libraries
   2
   3 AC_DEFUN(tinc_OPENSSL,
   4 [
   5   tinc_ac_save_CPPFLAGS="$CPPFLAGS"
   6
   7   AC_ARG_WITH(openssl-include,
   8     [  --with-openssl-include=DIR  OpenSSL headers directory (without trailing /openssl)],
   9     [openssl_include="$withval"
  10      CFLAGS="$CFLAGS -I$withval"
  11      CPPFLAGS="$CPPFLAGS -I$withval"]
  12   )
  13
  14   AC_ARG_WITH(openssl-lib,
  15     [  --with-openssl-lib=DIR  OpenSSL library directory],
  16     [openssl_lib="$withval"
  17      LIBS="$LIBS -L$withval"]
  18   )
  19
  20   AC_CHECK_HEADERS(openssl/evp.h openssl/rsa.h openssl/rand.h openssl/err.h openssl/sha.h openssl/pem.h,
  21     [],
  22     [AC_MSG_ERROR([OpenSSL header files not found.]); break]
  23   )
  24
  25   CPPFLAGS="$tinc_ac_save_CPPFLAGS"
  26
  27   AC_CHECK_LIB(crypto, SHA1_version,
  28     [LIBS="$LIBS -lcrypto"],
  29     [AC_MSG_ERROR([OpenSSL libraries not found.])]
  30   )
  31
  32   AC_CHECK_FUNCS(RAND_pseudo_bytes)
  33
  34   AC_CHECK_FUNC(OpenSSL_add_all_algorithms,
  35     [],
  36     [AC_CHECK_FUNC(SSLeay_add_all_algorithms,
  37       [AC_DEFINE(HAVE_SSLEAY_ADD_ALL_ALGORITHMS, 1, [Defined if this function should be used instead of OpenSLL_add_all_algorithms])],
  38       [AC_MSG_ERROR([Missing required OpenSSL functionality!])]
  39     )]
  40   )
  41
  42   AC_CHECK_FUNC(dlopen,
  43     [],
  44     [AC_CHECK_LIB(dl, dlopen,
  45       [LIBS="$LIBS -ldl"],
  46       [AC_MSG_ERROR([OpenSSL depends on libdl.])]
  47     )]
  48   )
  49 ])