sys: use config.h to track default settings

Instead of duplicating each manually, use the config.h from the
sources to simplify future upgrades.

PR #35

Author: carenas

pcre2-sys/build.rs

@@ -41,14 +41,7 @@ fn main() {
         .define("PCRE2_CODE_UNIT_WIDTH", "8")
         .define("HAVE_STDLIB_H", "1")
         .define("HAVE_MEMMOVE", "1")
-        .define("HEAP_LIMIT", "20000000")
-        .define("LINK_SIZE", "2")
-        .define("MATCH_LIMIT", "10000000")
-        .define("MATCH_LIMIT_DEPTH", "10000000")
-        .define("MAX_NAME_COUNT", "10000")
-        .define("MAX_NAME_SIZE", "32")
-        .define("NEWLINE_DEFAULT", "2")
-        .define("PARENS_NEST_LIMIT", "250")
+        .define("HAVE_CONFIG_H", "1")
         .define("PCRE2_STATIC", "1")
         .define("STDC_HEADERS", "1")
         .define("SUPPORT_PCRE2_8", "1")