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include(CheckCSourceCompiles)
include(CheckCXXSourceCompiles)
include(CheckCSourceRuns)
set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_LIBRARIES})
# Use all includes, not just OpenSSL includes to see if there are
# include files of different versions that do not match
GET_DIRECTORY_PROPERTY(includes INCLUDE_DIRECTORIES)
set(CMAKE_REQUIRED_INCLUDES ${includes})
check_c_source_compiles("
#include <openssl/ssl.h>
int main() { return 0; }
" including_ssl_h_works)
if (NOT including_ssl_h_works)
# On Red Hat we may need to include Kerberos header.
set(CMAKE_REQUIRED_INCLUDES ${includes} /usr/kerberos/include)
check_c_source_compiles("
#include <krb5.h>
#include <openssl/ssl.h>
int main() { return 0; }
" NEED_KRB5_H)
if (NOT NEED_KRB5_H)
message(FATAL_ERROR
"OpenSSL test failure. See CmakeError.log for details.")
else ()
message(STATUS "OpenSSL requires Kerberos header")
include_directories("/usr/kerberos/include")
endif ()
endif ()
# check for OPENSSL_add_all_algorithms_conf function
# and thus OpenSSL >= v0.9.7
check_c_source_compiles("
#include <openssl/evp.h>
int main() {
OPENSSL_add_all_algorithms_conf();
return 0;
}
" openssl_greater_than_0_9_7)
if (NOT openssl_greater_than_0_9_7)
message(FATAL_ERROR "OpenSSL >= v0.9.7 required")
endif ()
check_cxx_source_compiles("
#include <openssl/x509.h>
int main() {
const unsigned char** cpp = 0;
X509** x =0;
d2i_X509(x, cpp, 0);
return 0;
}
" OPENSSL_D2I_X509_USES_CONST_CHAR)
if (NOT OPENSSL_D2I_X509_USES_CONST_CHAR)
# double check that it compiles without const
check_cxx_source_compiles("
#include <openssl/x509.h>
int main() {
unsigned char** cpp = 0;
X509** x =0;
d2i_X509(x, cpp, 0);
return 0;
}
" OPENSSL_D2I_X509_USES_CHAR)
if (NOT OPENSSL_D2I_X509_USES_CHAR)
message(FATAL_ERROR
"Can't determine if openssl_d2i_x509() takes const char parameter")
endif ()
endif ()
check_c_source_runs("
#include <stdio.h>
#include <openssl/opensslv.h>
#include <openssl/crypto.h>
int main() {
printf(\"-- OpenSSL Library version: %s\\\\n\", SSLeay_version(SSLEAY_VERSION));
printf(\"-- OpenSSL Header version: %s\\\\n\", OPENSSL_VERSION_TEXT);
if (SSLeay() == OPENSSL_VERSION_NUMBER) {
return 0;
}
return -1;
}
" OPENSSL_CORRECT_VERSION_NUMBER )
if (NOT OPENSSL_CORRECT_VERSION_NUMBER)
message(FATAL_ERROR
"OpenSSL library version does not match headers")
endif ()
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_LIBRARIES)
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