Hi 
i followed the guide to setup and ubuntu vm , then checkout code, then use menuconfig to select stuff for dlink dap 2695, and add some other like aircrack-ng , then i ended with make command to obtain compiled packages and system image, all without error.
Then i uploaded system image trougth web ui and after system-image upload i received a warning that the file isn't compliant and the possibility to force, then i tried and the result is that the dlink antenna don't work.
I can restore the previous firmware directly on spi nor and come back to a working device, the repeat the procedure described.
i not understand what is missing or is wrong when select stuff under menuconfig
by dump nor memory with working and not working openwrt and using binwalk tool to compare the offset i can see:
working openwrt
DECIMAL HEXADECIMAL DESCRIPTION
--------------------------------------------------------------------------------
125472 0x1EA20 Certificate in DER format (x509 v3), header length: 4, sequence length: 64
150112 0x24A60 U-Boot version string, "U-Boot 1.1.4 (Jun 27 2013 - 17:53:03)"
150400 0x24B80 CRC32 polynomial table, big endian
174132 0x2A834 HTML document header
174260 0x2A8B4 HTML document footer
174272 0x2A8C0 HTML document header
174288 0x2A8D0 HTML document header
174509 0x2A9AD HTML document footer
174544 0x2A9D0 HTML document footer
174596 0x2AA04 HTML document header
175274 0x2ACAA HTML document footer
327696 0x50010 gzip compressed data, maximum compression, from Unix, last modified: 1970-01-01 00:01:20 (bogus date)
393216 0x60000 JFFS2 filesystem, big endian
458864 0x70070 Unix path: /dev/mtdblock/1
458912 0x700A0 LZMA compressed data, properties: 0x6D, dictionary size: 8388608 bytes, uncompressed size: 7865770 bytes
6750208 0x670000 Squashfs filesystem, little endian, version 4.0, compression:xz, size: 3931344 bytes, 1338 inodes, blocksize: 262144 bytes, created: 2023-10-09 21:45:35
10682368 0xA30000 JFFS2 filesystem, big endian
16187408 0xF70010 POSIX tar archive (GNU), owner user name: "_tar/"
not working openwrt
DECIMAL HEXADECIMAL DESCRIPTION
--------------------------------------------------------------------------------
125472 0x1EA20 Certificate in DER format (x509 v3), header length: 4, sequence length: 64
150112 0x24A60 U-Boot version string, "U-Boot 1.1.4 (Jun 27 2013 - 17:53:03)"
150400 0x24B80 CRC32 polynomial table, big endian
174132 0x2A834 HTML document header
174260 0x2A8B4 HTML document footer
174272 0x2A8C0 HTML document header
174288 0x2A8D0 HTML document header
174509 0x2A9AD HTML document footer
174544 0x2A9D0 HTML document footer
174596 0x2AA04 HTML document header
175274 0x2ACAA HTML document footer
327696 0x50010 gzip compressed data, maximum compression, from Unix, last modified: 1970-01-01 00:01:20 (bogus date)
393216 0x60000 JFFS2 filesystem, big endian
458864 0x70070 Unix path: /dev/mtdblock/1
458912 0x700A0 LZMA compressed data, properties: 0x6D, dictionary size: 8388608 bytes, uncompressed size: 7865770 bytes
6750208 0x670000 Squashfs filesystem, little endian, version 4.0, compression:xz, size: 3931344 bytes, 1338 inodes, blocksize: 262144 bytes, created: 2023-10-09 21:45:35
10682368 0xA30000 JFFS2 filesystem, big endian
16187408 0xF70010 POSIX tar archive (GNU), owner user name: "_tar/"