<p class="level0">The flags option is a bit pattern that tells libcurl exactly what features to init, as described below. Set the desired bits by ORing the values together. In normal operation, you must specify CURL_GLOBAL_ALL. Don't use any other value unless you are familiar with it and mean to control internal operations of libcurl.
<p class="level0"><span Class="bold">This function is not thread safe.</span> You must not call it when any other thread in the program (i.e. a thread sharing the same memory) is running. This doesn't just mean no other thread that is using libcurl. Because <a Class="emphasis" href="./curl_global_init.html">curl_global_init</a> calls functions of other libraries that are similarly thread unsafe, it could conflict with any other thread that uses these other libraries.
<p class="level0">If you are initializing libcurl from a Windows DLL you should not initialize it from DllMain or a static initializer because Windows holds the loader lock during that time and it could cause a deadlock.
-<p class="level0">See the description in <a Class="bold" href="./libcurl.html">libcurl</a> of global environment requirements for details of how to use this function.
-<p class="level0"><a name="FLAGS"></a><h2 class="nroffsh">FLAGS</h2>
+<p class="level0">See the description in <a Class="emphasis" href="./libcurl.html">libcurl</a> of global environment requirements for details of how to use this function. <a name="FLAGS"></a><h2 class="nroffsh">FLAGS</h2>
<p class="level0">
-<p class="level0"><span Class="bold">CURL_GLOBAL_ALL</span> Initialize everything possible. This sets all known bits except <span Class="bold">CURL_GLOBAL_ACK_EINTR</span>.
-<p class="level0"><span Class="bold">CURL_GLOBAL_SSL</span> Initialize SSL
-<p class="level0"><span Class="bold">CURL_GLOBAL_WIN32</span> Initialize the Win32 socket libraries.
-<p class="level0"><span Class="bold">CURL_GLOBAL_NOTHING</span> Initialise nothing extra. This sets no bit.
-<p class="level0"><span Class="bold">CURL_GLOBAL_DEFAULT</span> A sensible default. It will init both SSL and Win32. Right now, this equals the functionality of the <span Class="bold">CURL_GLOBAL_ALL</span> mask.
-<p class="level0"><span Class="bold">CURL_GLOBAL_ACK_EINTR</span> When this flag is set, curl will acknowledge EINTR condition when connecting or when waiting for data. Otherwise, curl waits until full timeout elapses. (Added in 7.30.0) <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
+<p class="level0"><a name="CURLGLOBALALL"></a><span class="nroffip">CURL_GLOBAL_ALL</span>
+<p class="level1">Initialize everything possible. This sets all known bits except <a class="bold" href="#CURLGLOBALACKEINTR">CURL_GLOBAL_ACK_EINTR</a>.
+<p class="level1">
+<p class="level0"><a name="CURLGLOBALSSL"></a><span class="nroffip">CURL_GLOBAL_SSL</span>
+<p class="level1">Initialize SSL.
+<p class="level1">The implication here is that if this bit is not set, the initialization of the SSL layer needs to be done by the application or at least outside of libcurl. The exact procedure how to do SSL initializtion depends on the TLS backend libcurl uses.
+<p class="level1">Doing TLS based transfers without having the TLS layer initialized may lead to unexpected behaviors.
+<p class="level0"><a name="CURLGLOBALWIN32"></a><span class="nroffip">CURL_GLOBAL_WIN32</span>
+<p class="level1">Initialize the Win32 socket libraries.
+<p class="level1">The implication here is that if this bit is not set, the initialization of winsock has to be done by the application or you risk getting undefined behaviors. This option exists for when the initialization is handled outside of libcurl so there's no need for libcurl to do it again.
+<p class="level0"><a name="CURLGLOBALNOTHING"></a><span class="nroffip">CURL_GLOBAL_NOTHING</span>
+<p class="level1">Initialise nothing extra. This sets no bit.
+<p class="level0"><a name="CURLGLOBALDEFAULT"></a><span class="nroffip">CURL_GLOBAL_DEFAULT</span>
+<p class="level1">A sensible default. It will init both SSL and Win32. Right now, this equals the functionality of the <a class="bold" href="#CURLGLOBALALL">CURL_GLOBAL_ALL</a> mask.
+<p class="level0"><a name="CURLGLOBALACKEINTR"></a><span class="nroffip">CURL_GLOBAL_ACK_EINTR</span>
+<p class="level1">When this flag is set, curl will acknowledge EINTR condition when connecting or when waiting for data. Otherwise, curl waits until full timeout elapses. (Added in 7.30.0) <a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
<p class="level0">If this function returns non-zero, something went wrong and you cannot use the other curl functions. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
<p class="level0"><a Class="manpage" href="./curl_global_init_mem.html">curl_global_init_mem</a>, <a Class="manpage" href="./curl_global_cleanup.html">curl_global_cleanup</a>, <a Class="manpage" href="./curl_easy_init.html">curl_easy_init</a>, <a Class="manpage" href="./libcurl.html">libcurl</a><p class="roffit">
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