Only run external symbols test on Linux. Closes #304.

Author: oschwald

Changes.md

@@ -1,3 +1,8 @@
+## 1.7.1
+
+* The external symbols test now only runs on Linux. It assumes a Linux
+  environment. Reported by Carlo Cabrera. GitHub #304.
+
 ## 1.7.0 - 2022-09-28
 
 * `FD_CLOEXEC` is now set on platforms that do not support `O_CLOEXEC`.

t/external_symbols_t.pl

@@ -5,12 +5,20 @@
 
 use FindBin qw( $Bin );
 
+_skip_tests_if_not_linux();
 _skip_tests_if_required_modules_are_not_present();
 _skip_tests_if_nm_is_not_present();
 _test_libs_external_symbols();
 
 done_testing();
 
+sub _skip_tests_if_not_linux {
+    return if $^O eq 'linux';
+
+    print "1..0 # skip all tests skipped - this test requires Linux.\n";
+    exit 0;
+}
+
 sub _skip_tests_if_required_modules_are_not_present {
     eval <<'EOF';
     use Test::More 0.88;