Fix alloca usage on FreeBSD

CMakeLists.txt

@@ -289,8 +289,10 @@ if(WITH_SQLITE)
                     SQLITE_OMIT_DEPRECATED
                     SQLITE_OMIT_PROGRESS_CALLBACK
                     SQLITE_OMIT_SHARED_CACHE
-                    SQLITE_USE_ALLOCA
         )
+        if(HAVE_ALLOCA_H)
+            target_compile_definitions(sqlite3 PRIVATE SQLITE_USE_ALLOCA)
+        endif()
         if(WITH_MILTER AND TARGET Threads::Threads)
             target_link_libraries(sqlite3 PRIVATE Threads::Threads)
         endif()

src/srs2.c

@@ -20,8 +20,6 @@
 
 #include <postsrsd_build_config.h>
 #include <stdarg.h>
-#include <string.h> /* memcpy, strcpy, memset */
-#include <strings.h>
 #ifdef HAVE_ALLOCA_H
 #    include <alloca.h>
 #endif
@@ -285,7 +283,11 @@ static void srs_hash_create_v(srs_t* srs, int idx, char* buf, int nargs,
     {
         data = va_arg(ap, char*);
         len = strlen(data);
+#ifndef HAVE_ALLOCA_H
+        lcdata = malloc(len + 1);
+#else
         lcdata = alloca(len + 1);
+#endif
         for (j = 0; j < len; j++)
         {
             if (isupper(data[j]))
@@ -297,6 +299,9 @@ static void srs_hash_create_v(srs_t* srs, int idx, char* buf, int nargs,
         HMAC_Update(&ctx, lcdata, len);
 #else
         srs_hmac_update(&ctx, lcdata, len);
+#endif
+#ifndef HAVE_ALLOCA_H
+        free(lcdata);
 #endif
     }