/usr/lib/gcc-cross/alpha-linux-gnu/5/adalib/gnatprj/err_vars.ali is in libgnatprj5-dev-alpha-cross 5.3.1-14ubuntu2cross1.
This file is owned by root:root, with mode 0o444.
The actual contents of the file can be viewed below.
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A -nostdinc
A -O2
A -fPIC
A -g
A -gnatn
P ZX
RN
RV NO_ELABORATION_CODE
RV SPARK_05
U err_vars%s err_vars.ads 154d5cae EE OO PK
W namet%s namet.adb namet.ali
W system%s system.ads system.ali
W system.exception_table%s s-exctab.adb s-exctab.ali
W system.standard_library%s s-stalib.adb s-stalib.ali
W types%s types.adb types.ali
W uintp%s uintp.adb uintp.ali
D ada.ads 20070406091342 3ffc8e18 ada%s
D a-except.ads 20140730140058 5250cb69 ada.exceptions%s
D a-unccon.ads 20070406091342 f9eb8f06 ada.unchecked_conversion%s
D a-uncdea.ads 20070406091342 f15a5ed1 ada.unchecked_deallocation%s
D alloc.ads 20150107084147 61013b91 alloc%s
D debug.ads 20090420131856 3ea59655 debug%s
D err_vars.ads 20140801132617 d6d090e9 err_vars%s
D hostparm.ads 20140801100131 a20ca6cf hostparm%s
D namet.ads 20150302110329 53fa811d namet%s
D opt.ads 20150302110329 e5e8f770 opt%s
D output.ads 20140801093848 2d9479ad output%s
D system.ads 20141030114420 67019775 system%s
D s-conca2.ads 20140225151544 02a0d7d0 system.concat_2%s
D s-exctab.ads 20140225151139 54135002 system.exception_table%s
D s-exctab.adb 20140611105235 c756f391 system.exception_table%b
D s-memory.ads 20140225151139 597d6634 system.memory%s
D s-os_lib.ads 20150220113817 5853d835 system.os_lib%s
D s-parame.ads 20140801093848 7e2a0d7f system.parameters%s
D s-soflin.ads 20140801100131 aa763b52 system.soft_links%s
D s-stache.ads 20140225151139 a37c21ec system.stack_checking%s
D s-stalib.ads 20150220094550 fa0a3617 system.standard_library%s
D s-stoele.ads 20140225151139 2dc34a04 system.storage_elements%s
D s-string.ads 20140225151139 8fe54fb7 system.strings%s
D s-traent.ads 20140730135025 005bf670 system.traceback_entries%s
D s-unstyp.ads 20140731130224 9d58a4c0 system.unsigned_types%s
D s-wchcon.ads 20140718092328 1b7d22d2 system.wch_con%s
D table.ads 20090506081141 e3a9ec16 table%s
D table.adb 20141107135941 9716557f table%b
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D uintp.ads 20160414103913 f3f1d794 uintp%s
D unchconv.ads 20070406091342 ca2f9e18 unchecked_conversion%s
D unchdeal.ads 20070406091342 214516a4 unchecked_deallocation%s
X 7 err_vars.ads
33K9*Err_Vars 151l5 151e13
57i4*Error_Msg_Qual_Level{30|59I9}
63b4*Warn_On_Instance{boolean}
71i4*Raise_Exception_On_Error{30|62I12}
80X4*Error_Msg_Exception
83i4*Current_Error_Source_File{30|567I9}
91b4*Warning_Doc_Switch{boolean}
108i4*Error_Msg_Col{30|177I9}
111i4*Error_Msg_Uint_1{31|48I9}
112i4*Error_Msg_Uint_2{31|48I9}
115i4*Error_Msg_Sloc{30|212I12}
118i4*Error_Msg_Name_1{9|179I9}
119i4*Error_Msg_Name_2{9|179I9}
120i4*Error_Msg_Name_3{9|179I9}
123i4*Error_Msg_File_1{9|571I9}
124i4*Error_Msg_File_2{9|571I9}
125i4*Error_Msg_File_3{9|571I9}
128i4*Error_Msg_Unit_1{9|596I9}
129i4*Error_Msg_Unit_2{9|596I9}
132i4*Error_Msg_Node_1{30|384I9}
133i4*Error_Msg_Node_2{30|384I9}
136b4*Error_Msg_Warn{boolean}
146a4*Error_Msg_String{string}
147i4*Error_Msg_Strlen{natural}
X 9 namet.ads
38K9*Namet 7|29w6 29r17 9|707e10
179I9*Name_Id<integer> 7|118r23 119r23 120r23
571I9*File_Name_Type<179I9> 7|123r23 124r23 125r23
596I9*Unit_Name_Type<179I9> 7|128r23 129r23
X 12 system.ads
67M9*Address
X 16 s-memory.ads
53V13*Alloc{12|67M9} 103i<c,__gnat_malloc>22
68U14*Free 104i<c,__gnat_free>22
76V13*Realloc{12|67M9} 105i<c,__gnat_realloc>22
X 30 types.ads
52K9*Types 7|30w6 30r17 30|942e10
59I9*Int<integer> 7|57r27
62I12*Nat{59I9} 7|71r31
144I9*Text_Ptr<59I9>
177I9*Column_Number<short_integer> 7|108r20
212I12*Source_Ptr{144I9} 7|115r21
384I9*Node_Id<integer> 7|132r23 133r23
567I9*Source_File_Index<59I9> 7|83r32
570i4*Internal_Source_File{567I9} 7|83r53
X 31 uintp.ads
42K9*Uintp 7|31w6 31r17 31|542e10
48I9*Uint<30|59I9> 7|111r23 112r23
|