Path out _difftime64() dependency.

build.sh

@@ -123,6 +123,7 @@ pkg_ssh2="$(find "${LIBS_DIR}" -maxdepth 1 -name 'libssh2-*.tar.gz' | sort -rn |
 rm -rf "${SSH2_DIR}" && mkdir "${SSH2_DIR}"
 tar -xvf "${pkg_ssh2}" --strip-components=1 -C "${SSH2_DIR}"
 pushd "${SSH2_DIR}"
+patch -p1 -b < "${BASE_DIR}/patch/ssh2_session.diff"
 CFLAGS="-march=${MY_MARCH} -mtune=${MY_MTUNE} -I${LIBS_DIR}/include" LDFLAGS="-L${LIBS_DIR}/lib" LIBS="-latomic" ./configure --disable-examples-build --disable-shared --with-libz
 make
 cp -v src/.libs/libssh2.a "${LIBS_DIR}/lib"

patch/ssh2_session.diff

@@ -0,0 +1,22 @@
+diff --git "a/D:\\_Sandbox\\curl\\libssh2-x64\\src\\session.c.orig" "b/D:\\_Sandbox\\curl\\libssh2-x64\\src\\session.c"
+index e439acd..476a497 100644
+--- "a/src/session.c"
++++ "b/src/session.c"
+@@ -58,6 +58,8 @@
+ #include "mac.h"
+ #include "misc.h"
+ 
++#define DIFFTIME(X,Y) ((double)((Y) - (X)))
++
+ /* libssh2_default_alloc
+  */
+ static
+@@ -610,7 +612,7 @@ int _libssh2_wait_socket(LIBSSH2_SESSION *session, time_t start_time)
+         (seconds_to_next == 0 ||
+          ms_to_next > session->api_timeout)) {
+         time_t now = time(NULL);
+-        elapsed_ms = (long)(1000*difftime(now, start_time));
++        elapsed_ms = (long)(1000*DIFFTIME(now, start_time));
+         if(elapsed_ms > session->api_timeout) {
+             return _libssh2_error(session, LIBSSH2_ERROR_TIMEOUT,
+                                   "API timeout expired");