check for alloca.h before including

configure.ac

@@ -205,6 +205,9 @@ AC_ARG_WITH(psl-testfile,
   PSL_TESTFILE="\$(top_srcdir)/data/test_psl.txt")
 AC_SUBST(PSL_TESTFILE)
 
+# check for alloca / alloca.h
+AC_FUNC_ALLOCA
+
 # 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

src/psl.c

@@ -63,10 +63,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#include <alloca.h>
 #include <errno.h>
 #include <langinfo.h>
 #include <arpa/inet.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #ifdef WITH_LIBICU
 #	include <unicode/uversion.h>

src/psl2c.c

@@ -38,6 +38,9 @@
 #include <time.h>
 #include <ctype.h>
 #include <sys/stat.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #if defined(BUILTIN_GENERATOR_LIBICU) || defined(BUILTIN_GENERATOR_LIBIDN2) || defined(BUILTIN_GENERATOR_LIBIDN)
 #	define _GENERATE_BUILTIN_DATA

tests/test-is-cookie-domain-acceptable.c

@@ -35,7 +35,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <alloca.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #include <libpsl.h>
 

tests/test-is-public-all.c

@@ -36,7 +36,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#include <alloca.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #include <libpsl.h>
 

tests/test-is-public-builtin.c

@@ -35,7 +35,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <alloca.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #include <libpsl.h>
 

tests/test-is-public.c

@@ -35,7 +35,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <alloca.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #include <libpsl.h>
 

tests/test-registrable-domain.c

@@ -36,7 +36,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#include <alloca.h>
+#ifdef HAVE_ALLOCA_H
+#	include <alloca.h>
+#endif
 
 #ifdef WITH_LIBICU
 #	include <unicode/uversion.h>