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<p style="margin: 0px 0px 1.2em !important;">Hey everyone,</p>
<p style="margin: 0px 0px 1.2em !important;">I’m shipping a config
file for my library and inside I set push/pop specific policies
so that me and the consumers of my library can target different
policies without us clashing against each other. However I’m
struggling with <code style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;">cmake_policy(PUSH)</code>/<code style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;">cmake_policy(POP)</code>
once they are invoked from macro/functions. </p>
<p style="margin: 0px 0px 1.2em !important;">Here’s a minimal
failure example illustrating my problem</p>
<pre style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code class="hljs language-cmake" style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block !important;display: block; overflow-x: auto; padding: 0.5em; color: rgb(51, 51, 51); background: rgb(248, 248, 248) none repeat scroll 0% 0%; -moz-text-size-adjust: none;">
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">project</span>(pcl-config-test)
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">cmake_minimum_required</span>(VERSION <span class="hljs-number" style="color: rgb(0, 128, 128);">3.5</span>)
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">cmake_policy</span>(PUSH)
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">macro</span>(return_early)
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;"># clean up code</span>
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">cmake_policy</span>(POP)
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">return</span>()
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">endmacro</span>()
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;"># 1. do a bunch of things. invoke a couple of macros/functions</span>
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;"># from within other macros/functions, etc...</span>
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;"># 2. some error occurs</span>
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">if</span>(ERROR)
return_early()
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">endif</span>()
<span class="hljs-comment" style="color: rgb(153, 153, 136); font-style: italic;"># 3. Everything went well</span>
<span class="hljs-keyword" style="color: rgb(51, 51, 51); font-weight: bold;">cmake_policy</span>(POP)
</code></pre>
<p style="margin: 0px 0px 1.2em !important;">This produces the
following output</p>
<pre style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;font-size: 1em; line-height: 1.2em;margin: 1.2em 0px;"><code style="font-size: 0.85em; font-family: Consolas, Inconsolata, Courier, monospace;margin: 0px 0.15em; padding: 0px 0.3em; white-space: pre-wrap; border: 1px solid rgb(234, 234, 234); background-color: rgb(248, 248, 248); border-radius: 3px; display: inline;white-space: pre; overflow: auto; border-radius: 3px; border: 1px solid rgb(204, 204, 204); padding: 0.5em 0.7em; display: block !important;">
CMake Error at CMakeLists.txt:27 (my_macro):
cmake_policy POP without matching PUSH
CMake Error in CMakeLists.txt:
cmake_policy PUSH without matching POP
-- Configuring incomplete, errors occurred!
</code></pre>
<p style="margin: 0px 0px 1.2em !important;">I was counting on the
policy stack being preserved for at least macros, but that is
not the case.</p>
<p style="margin: 0px 0px 1.2em !important;">Is there a way for me
to return early from my config file from within macros?</p>
<p style="margin: 0px 0px 1.2em !important;">Best regards,</p>
<p style="margin: 0px 0px 1.2em !important;">Sérgio</p>
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