WRF | error - jas_image_t aka struct anonymous has no member named inmem_ and image.inmem_=1

Issue

While compiling WPSv3.8.1,

17 gcc -c  -D_UNDERSCORE -DBYTESWAP -DLINUX -DIO_NETCDF -DBIT32 -DNO_SIGNAL -D_MPI -I/home/wpsze/WRF/WRFv440/Library/include/ -DUSE_JPEG2000 -DUSE_PNG -D__64BIT__ enc_jp    eg2000.c
18 enc_jpeg2000.c: In function ‘enc_jpeg2000_’:
19 enc_jpeg2000.c:141:10: error: ‘jas_image_t’ {aka ‘struct <anonymous>’} has no member named ‘inmem_’
20   141 |     image.inmem_=1;
21       |          ^
22 make[2]: [Makefile:75: enc_jpeg2000.o] Error 1 (ignored)

Search

From Grib2 output is broken -- https://github.com/wrf-model/WRF/issues/993

I'm unsure if the issue has been resolved, or if anyone still cares, but I think I see what might be going on here. The offending part of enc_jpeg2000.c relates to a C struct of type jas_image_t (in line 87 in the version of this file I'm looking at):

jas_image_t image;

It throws an error when the code tries to access the inmem_ element:

image.inmem_=1;

This C struct is defined by jasper/jas_image.h (version 2.0.14, which is what I have on the system I'm working on).

/* Image class. */

typedef struct {

        jas_image_coord_t tlx_;
        /* The x-coordinate of the top-left corner of the image bounding box. */

        jas_image_coord_t tly_;
        /* The y-coordinate of the top-left corner of the image bounding box. */

        jas_image_coord_t brx_;
        /* The x-coordinate of the bottom-right corner of the image bounding
          box (plus one). */

        jas_image_coord_t bry_;
        /* The y-coordinate of the bottom-right corner of the image bounding
          box (plus one). */

        int numcmpts_;
        /* The number of components. */

        int maxcmpts_;
        /* The maximum number of components that this image can have (i.e., the
          allocated size of the components array). */

        jas_image_cmpt_t **cmpts_;
        /* Per-component information. */

        jas_clrspc_t clrspc_;

        jas_cmprof_t *cmprof_;

//      bool inmem_;

} jas_image_t;

You can see that the bool component inmem_ has been commented out. If you go back to older versions of jasper you can get back to one that doesn't have inmem_ commented out. For example, in the github repo for this library, that would be something like SHAH 2b2efba4eda0a654ab02 or version 1.900.24, which dates to Nov 2016.

Workaround

In WPSv3.8.1 code

./ungrib/src/ngl/g2/dec_jpeg2000.c:104:    printf(" inmem %d \n",image->inmem_);
./ungrib/src/ngl/g2/enc_jpeg2000.c:141:    image.inmem_=1;

and, modify enc_jpeg2000.c

/* 
 * Does not seem to be needed, and throws a compiler error
 * image.inmem_=1;
 */

Finally, ungrib.exe is generated.

but, is it right? will that break something...?

Ref: WRF 3.9.1.1 安装 记录 >此外，如果安装的是较新的jasper版本，还需要更改文件enc_jpeg2000.c （在目录WPS/ungrib/src/ngl/g2/enc_jpeg2000.c） > 参见 http://forum.wrfforum.com/viewtopic.php?f=20&t=10035 >将第141行 >> image.inmem_=1; >注释掉 >这样，就能生成ungrib.exe了