mapserver: fix build with libxml2 2.12

    sha256 = "sha256-fAf4kOe/6bQW0i46+EZbD/6iWI2Bjkn2no6XeR/+mg4=";

  };

  patches = [

    # drop this patch for version 8.0.2

    ./fix-build-w-libxml2-12.patch

  ];

  nativeBuildInputs = [

    cmake

    pkg-config

diff --git a/mapows.c b/mapows.c

index f141a7b..5a94ecb 100644

--- a/mapows.c

+++ b/mapows.c

@@ -168,7 +168,7 @@ static int msOWSPreParseRequest(cgiRequestObj *request,

 #endif

     if (ows_request->document == NULL

         || (root = xmlDocGetRootElement(ows_request->document)) == NULL) {

-      xmlErrorPtr error = xmlGetLastError();

+      const xmlError *error = xmlGetLastError();

       msSetError(MS_OWSERR, "XML parsing error: %s",

                  "msOWSPreParseRequest()", error->message);

       return MS_FAILURE;

diff --git a/mapwcs.cpp b/mapwcs.cpp

index 70e63b8..19afa79 100644

--- a/mapwcs.cpp

+++ b/mapwcs.cpp

@@ -362,7 +362,7 @@ static int msWCSParseRequest(cgiRequestObj *request, wcsParamsObj *params, mapOb

     /* parse to DOM-Structure and get root element */

     if((doc = xmlParseMemory(request->postrequest, strlen(request->postrequest)))

         == NULL) {

-      xmlErrorPtr error = xmlGetLastError();

+      const xmlError *error = xmlGetLastError();

       msSetError(MS_WCSERR, "XML parsing error: %s",

                  "msWCSParseRequest()", error->message);

       return MS_FAILURE;

diff --git a/mapwcs20.cpp b/mapwcs20.cpp

index b35e803..2431bdc 100644

--- a/mapwcs20.cpp

+++ b/mapwcs20.cpp

@@ -1446,7 +1446,7 @@ int msWCSParseRequest20(mapObj *map,

     /* parse to DOM-Structure and get root element */

     if(doc == NULL) {

-      xmlErrorPtr error = xmlGetLastError();

+      const xmlError *error = xmlGetLastError();

       msSetError(MS_WCSERR, "XML parsing error: %s",

                  "msWCSParseRequest20()", error->message);

       return MS_FAILURE;