user78742: I have followed the guide "Building headless Bitcoin and Bitcoin-qt on Windows" but with a more recent altcoin source code to test.
The compilation stop on ld.exe: cannot find -lsecp256k1
Is one step missing to generate this missing dll ?
My qt-pro includes:

win32:BOOST_LIB_SUFFIX=-mgw49-mt-s-1_57
  win32:BOOST_INCLUDE_PATH=C:/Deps/boost_1_57_0
  win32:BOOST_LIB_PATH=C:/Deps/boost_1_57_0/stage/lib
  win32:BDB_INCLUDE_PATH=c:/deps/db-4.8.30.NC/build_unix/
  win32:BDB_LIB_PATH=c:/deps/db-4.8.30.NC/build_unix
  win32:OPENSSL_INCLUDE_PATH=C:/Deps/openssl-1.0.2k/include/
  win32:OPENSSL_LIB_PATH=C:/Deps/openssl-1.0.2k
  win32:MINIUPNPC_INCLUDE_PATH=C:/Deps/
  win32:MINIUPNPC_LIB_PATH=C:/Deps/miniupnpc/
  win32:LIBPNG_INCLUDE_PATH=C:/Deps/libpng-1.6.1/
  win32:LIBPNG_LIB_PATH=C:/Deps/libpng-1.6.18
  win32:QRENCODE_INCLUDE_PATH=C:/Deps/qrencode-3.4.4
  win32:QRENCODE_LIB_PATH=C:/Deps/qrencode-3.4.4/.libs
  win32:SECP256K1_LIB_PATH = C:/Crypto/mycrypto/src/secp256k1/
  win32:SECP256K1_INCLUDE_PATH = C:/Crypto/mycrypto/src/secp256k1/include


user78742: Problem resolved ! 
There was an error during the secp256k1 compilation process (MINGW32 under windows), adding:

LT_INIT([win32-dll])

into the secp256k1/configure.ac has resolved the compilation error.

78742: <p>I have followed the guide "<a href="https://bitcointalk.org/index.php?topic=149479.0" rel="nofollow noreferrer">Building headless Bitcoin and Bitcoin-qt on Windows</a>" but with a more recent altcoin source code to test.</p>

<p>The compilation stop on <strong>ld.exe: cannot find -lsecp256k1</strong></p>

<p>Is one step missing to generate this missing dll ?</p>

<p>My qt-pro includes:</p>

<blockquote>
  <p>win32:BOOST_LIB_SUFFIX=-mgw49-mt-s-1_57<br>
  win32:BOOST_INCLUDE_PATH=C:/Deps/boost_1_57_0<br>
  win32:BOOST_LIB_PATH=C:/Deps/boost_1_57_0/stage/lib<br>
  win32:BDB_INCLUDE_PATH=c:/deps/db-4.8.30.NC/build_unix/<br>
  win32:BDB_LIB_PATH=c:/deps/db-4.8.30.NC/build_unix<br>
  win32:OPENSSL_INCLUDE_PATH=C:/Deps/openssl-1.0.2k/include/<br>
  win32:OPENSSL_LIB_PATH=C:/Deps/openssl-1.0.2k<br>
  win32:MINIUPNPC_INCLUDE_PATH=C:/Deps/<br>
  win32:MINIUPNPC_LIB_PATH=C:/Deps/miniupnpc/<br>
  win32:LIBPNG_INCLUDE_PATH=C:/Deps/libpng-1.6.1/<br>
  win32:LIBPNG_LIB_PATH=C:/Deps/libpng-1.6.18<br>
  win32:QRENCODE_INCLUDE_PATH=C:/Deps/qrencode-3.4.4<br>
  win32:QRENCODE_LIB_PATH=C:/Deps/qrencode-3.4.4/.libs<br>
  win32:SECP256K1_LIB_PATH = C:/Crypto/mycrypto/src/secp256k1/<br>
  win32:SECP256K1_INCLUDE_PATH = C:/Crypto/mycrypto/src/secp256k1/include</p>
</blockquote>
 78742: <p>Problem resolved ! 
There was an error during the secp256k1 compilation process (MINGW32 under windows), adding:</p>

<blockquote>
  <p><code>LT_INIT([win32-dll])</code></p>
</blockquote>

<p>into the secp256k1/configure.ac has resolved the compilation error.</p>
