From 80fc384e217ca43d29bd7e8323a391ffccb526d2 Mon Sep 17 00:00:00 2001
From: Andrei Pavel <andrei@isc.org>
Date: Tue, 22 Apr 2025 23:08:26 +0300
Subject: [PATCH] [#3732] Meson: Add gtest.cc compiler check to detect crashes

---
 compiler-checks/gtest.cc | 12 ++++++++++++
 meson.build              | 21 ++++++++++++++++-----
 2 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 compiler-checks/gtest.cc

diff --git a/compiler-checks/gtest.cc b/compiler-checks/gtest.cc
new file mode 100644
index 0000000000..eb1bcea6ec
--- /dev/null
+++ b/compiler-checks/gtest.cc
@@ -0,0 +1,12 @@
+#include <gtest/gtest.h>
+
+// musl's mallocng memory allocator stupidly crash for test names that are
+// lengthier than 16 characters. Hence the long test name.
+TEST(Fixture, testWithLongLongLongName) {
+    EXPECT_LT(1, 2);
+}
+
+int main() {
+    testing::InitGoogleTest();
+    return RUN_ALL_TESTS();
+}
diff --git a/meson.build b/meson.build
index 3f5d541a67..f66a543e53 100644
--- a/meson.build
+++ b/meson.build
@@ -244,11 +244,22 @@ if netconf_opt.enabled() and NETCONF_DEP.get_variable(
     error('Dependency not found: NETCONF.')
 endif
 
-GTEST_DEP = dependency(
-    'gtest',
-    fallback: ['gtest', 'gtest_dep'],
-    required: TESTS_OPT.enabled() or FUZZ_OPT.enabled(),
-)
+# Google Test
+GTEST_DEP = dependency('gtest', required: TESTS_OPT.enabled() or FUZZ_OPT.enabled())
+if GTEST_DEP.found()
+    result = cpp.run(
+        fs.read('compiler-checks/gtest.cc'),
+        name: 'Check if a simple GTest test runs.',
+        dependencies: [GTEST_DEP],
+    )
+    if result.returncode() != 0
+        GTEST_DEP = disabler()
+        gtest_subproject = subproject('gtest', required: false)
+        if gtest_subproject.found()
+            GTEST_DEP = gtest_subproject.get_variable('gtest_dep')
+        endif
+    endif
+endif
 
 # Crypto
 if crypto_opt == 'botan'