Fix build when dirent.h is not available

configure.ac

@@ -370,6 +370,9 @@ AC_SUBST(PSL_TESTFILE)
 AC_FUNC_ALLOCA
 AC_CHECK_FUNCS([strndup clock_gettime fmemopen nl_langinfo])
 
+# check for dirent.h
+AC_HEADER_DIRENT
+
 # Override the template file name of the generated .pc file, so that there
 # is no need to rename the template file when the API version changes.
 AC_CONFIG_FILES([Makefile

fuzz/main.c

@@ -40,7 +40,6 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <sys/stat.h>
-#include <dirent.h>
 
 #if defined (_MSC_VER) && ! defined (ssize_t)
 #include <basetsd.h>
@@ -49,7 +48,9 @@ typedef SSIZE_T ssize_t;
 
 #include "fuzzer.h"
 
-#if defined (TEST_RUN) && defined (HAVE_FMEMOPEN)
+#if defined (TEST_RUN) && defined (HAVE_FMEMOPEN) && defined (HAVE_DIRENT_H)
+
+#include <dirent.h>
 
 static void test_all_from(const char *dirname)
 {
@@ -122,7 +123,7 @@ int main(int argc, char **argv)
 	return 0;
 }
 
-#else /* TEST_RUN && HAVE_FMEMOPEN */
+#else /* TEST_RUN && HAVE_FMEMOPEN && HAVE_DIRENT_H */
 
 #ifndef __AFL_LOOP
 static int __AFL_LOOP(int n)
@@ -158,4 +159,4 @@ int main(int argc, char **argv)
 #endif
 }
 
-#endif /* TEST_RUN && HAVE_FMEMOPEN*/
+#endif /* TEST_RUN && HAVE_FMEMOPEN && HAVE_DIRENT_H */

meson.build

@@ -107,6 +107,7 @@ config.set('BUILTIN_GENERATOR_LIBIDN', enable_builtin == 'libidn')
 config.set('HAVE_UNISTD_H', cc.check_header('unistd.h'))
 config.set('HAVE_STDINT_H', cc.check_header('stdint.h'))
 config.set('HAVE_ALLOCA_H', cc.check_header('alloca.h'))
+config.set('HAVE_DIRENT_H', cc.check_header('dirent.h'))
 config.set('HAVE_ALLOCA', cc.has_function('alloca'))
 config.set('HAVE_STRNDUP', cc.has_function('strndup'))
 config.set('HAVE_CLOCK_GETTIME', cc.has_function('clock_gettime'))