oauth: Fix kqueue detection on OpenBSD

jchampio · jchampio · commit 3a797c24914a · 2025-07-07T11:58:04.000-07:00
In b0635bf, I added an early header check to the Meson OAuth support, which was intended to duplicate the later checks for HAVE_SYS_[EVENT|EPOLL]_H. However, I implemented the new test via check_header() -- which tries to compile -- rather than has_header(), which just looks for the file's existence. The distinction matters on OpenBSD, where <sys/event.h> can't be compiled without including prerequisite headers, so -Dlibcurl=enabled failed on that platform. Switch to has_header() to fix this. Note that reviewers expressed concern about the difference between our Autoconf feature tests (which compile headers) and our Meson feature tests (which do not). I'm not opposed to aligning the two, but I want to avoid making bigger changes as part of this fix. Reviewed-by: Peter Eisentraut <peter@eisentraut.org> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/flat/CAOYmi+kdR218ke2zu74oTJvzYJcqV1MN5=mGAPqZQuc79HMSVA@mail.gmail.com Backpatch-through: 18
diff --git a/meson.build b/meson.build
@@ -943,10 +943,10 @@ if not libcurlopt.disabled()
   # libcurl and one of either epoll or kqueue.
   oauth_flow_supported = (
     libcurl.found()
-    and (cc.check_header('sys/event.h', required: false,
-                         args: test_c_args, include_directories: postgres_inc)
-         or cc.check_header('sys/epoll.h', required: false,
-                            args: test_c_args, include_directories: postgres_inc))
+    and (cc.has_header('sys/event.h',
+                       args: test_c_args, include_directories: postgres_inc)
+         or cc.has_header('sys/epoll.h',
+                          args: test_c_args, include_directories: postgres_inc))
   )
 
   if oauth_flow_supported
