/usr/lib/gcc-cross/arm-linux-gnueabi/6/adalib/gnatprj/prj-com.ali is in libgnatprj6-dev-armel-cross 6.4.0-17ubuntu1cross1.
This file is owned by root:root, with mode 0o444.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | V "GNAT Lib v6"
A -nostdinc
A -O2
A -fPIC
A -g
A -gnatn
A -march=armv5t
A -mfloat-abi=soft
A -mtls-dialect=gnu
P SS ZX
RN
RV NO_ACCESS_SUBPROGRAMS
RV SPARK_05
U prj.com%s prj-com.ads 18a830a0 NE OO PK
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W prj%s prj.adb prj.ali
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X 21 osint.ads
44K9*Osint 790e10 24|29w6 35r24
155U14*Fail 24|35r30
X 23 prj.ads
42K9*Prj 2135e8 24|31r9 40r5
X 24 prj-com.ads
31K13*Com 23|42k9 24|40l9 40e12
33P9*Fail_Proc 33>40 35r11
33a40 S{string}
35p4*Fail{33P9}
X 26 system.ads
67M9*Address
X 31 s-memory.ads
53V13*Alloc{26|67M9} 103i<c,__gnat_malloc>22
68U14*Free 104i<c,__gnat_free>22
76V13*Realloc{26|67M9} 105i<c,__gnat_realloc>22
|