qt5base-lts/config.tests/openssl/openssl.cpp

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#include <openssl/opensslv.h>

#if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER-0 < 0x0090700fL
#  error "OpenSSL >= 0.9.7 is required"
#endif

#include <openssl/ssl.h>

#if OPENSSL_VERSION_NUMBER-0 >= 0x10002000L && !defined(OPENSSL_NO_EC) && !defined(SSL_CTRL_SET_CURVES)
#  error "OpenSSL was reported as >= 1.0.2 but is missing required features, possibly it's libressl which is unsupported"
#endif

int main()
{
}