feature: added new C API ngx_http_lua_pcre_version to wrap the pcre_version() C API in libpcre.

Author: agentzh

config

@@ -497,61 +497,6 @@ fi
 
 # ----------------------------------------
 
-if [ $USE_PCRE = YES -o $PCRE != NONE ] && [ $PCRE != NO -a $PCRE != YES ]; then
-    # force pcre_version symbol to be required when PCRE is statically linked
-    case "$NGX_PLATFORM" in
-        Darwin:*)
-            ngx_feature="require defined symbols (-u)"
-            ngx_feature_name=
-            ngx_feature_path=
-            ngx_feature_libs="-Wl,-u,_strerror"
-            ngx_feature_run=no
-            ngx_feature_incs="#include <stdio.h>"
-            ngx_feature_test='printf("hello");'
-
-            . auto/feature
-
-            if [ $ngx_found = yes ]; then
-                CORE_LIBS="-Wl,-u,_pcre_version $CORE_LIBS"
-            fi
-        ;;
-
-        *)
-            ngx_feature="require defined symbols (--require-defined)"
-            ngx_feature_name=
-            ngx_feature_path=
-            ngx_feature_libs="-Wl,--require-defined=strerror"
-            ngx_feature_run=no
-            ngx_feature_incs="#include <stdio.h>"
-            ngx_feature_test='printf("hello");'
-
-            . auto/feature
-
-            if [ $ngx_found = yes ]; then
-                CORE_LIBS="-Wl,--require-defined=pcre_version $CORE_LIBS"
-
-            else
-                # ld 2.25 and below (--required-defined was introduced in 2.26)
-                ngx_feature="require defined symbols fallback (--undefined)"
-                ngx_feature_name=
-                ngx_feature_path=
-                ngx_feature_libs="-Wl,--undefined=strerror"
-                ngx_feature_run=no
-                ngx_feature_incs="#include <stdio.h>"
-                ngx_feature_test='printf("hello");'
-
-                . auto/feature
-
-                if [ $ngx_found = yes ]; then
-                    CORE_LIBS="-Wl,--undefined=pcre_version $CORE_LIBS"
-                fi
-            fi
-        ;;
-    esac
-fi
-
-# ----------------------------------------
-
 USE_MD5=YES
 USE_SHA1=YES
 

src/ngx_http_lua_regex.c

@@ -582,6 +582,13 @@ ngx_http_lua_ffi_max_regex_cache_size(void)
 }
 
 
+const char *
+ngx_http_lua_ffi_pcre_version(void)
+{
+    return pcre_version();
+}
+
+
 #endif /* NGX_PCRE */