Avoid multiply-defined symbols that lead to link errors such as:

  gcc -O2 -fno-strict-aliasing -fwrapv -Wall -fno-tree-vrp  -g -D_FILE_OFFSET_BITS=64 -D_REENTRANT -DCAML_NAME_SPACE  -Wl,-E -o ocamlruni prims.o libcamlruni.a -lm  -ldl -lpthread 
  ld: libcamlruni.a(backtrace.i.o):/tmp/guix-build-ocaml-4.07.1.drv-0/ocaml-4.07.1/byterun/backtrace.c:31: multiple definition of `caml_debug_info'; libcamlruni.a(backtrace_prim.i.o):/tmp/guix-build-ocaml-4.07.1.drv-0/ocaml-4.07.1/byterun/backtrace_prim.c:47: first defined here

diff --git a/asmrun/startup.c b/asmrun/startup.c
index 070f0c6..cf8a56f 100644
--- a/asmrun/startup.c
+++ b/asmrun/startup.c
@@ -44,7 +44,6 @@
 #endif
 
 extern int caml_parser_trace;
-CAMLexport header_t caml_atom_table[256];
 char * caml_code_area_start, * caml_code_area_end;
 struct ext_table caml_code_fragments_table;
 
diff --git a/byterun/backtrace.c b/byterun/backtrace.c
index 8dfe9b7..9cc9e72 100644
--- a/byterun/backtrace.c
+++ b/byterun/backtrace.c
@@ -28,7 +28,7 @@
 #include "caml/fail.h"
 
 /* The table of debug information fragments */
-struct ext_table caml_debug_info;
+static struct ext_table caml_debug_info;
 
 CAMLexport int32_t caml_backtrace_active = 0;
 CAMLexport int32_t caml_backtrace_pos = 0;
diff --git a/byterun/backtrace_prim.c b/byterun/backtrace_prim.c
index e69b256..d794f73 100644
--- a/byterun/backtrace_prim.c
+++ b/byterun/backtrace_prim.c
@@ -44,7 +44,7 @@
 #include "caml/backtrace_prim.h"
 
 /* The table of debug information fragments */
-struct ext_table caml_debug_info;
+static struct ext_table caml_debug_info;
 
 CAMLexport char_os * caml_cds_file = NULL;
 
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<div class='path'>path: <a href='/guix/log/?id=33014590340ac058eedd4ba23761b67b9561c783'>root</a>/<a href='/guix/log/nix?id=33014590340ac058eedd4ba23761b67b9561c783'>nix</a>/<a href='/guix/log/nix/libutil?id=33014590340ac058eedd4ba23761b67b9561c783'>libutil</a>/<a href='/guix/log/nix/libutil/util.cc?id=33014590340ac058eedd4ba23761b67b9561c783'>util.cc</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/libutil/util.cc?id=33014590340ac058eedd4ba23761b67b9561c783&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-05-13 16:31:34 +0200'>2024-05-13</span></td><td><a href='/guix/commit/nix/libutil/util.cc?id=7757fdd491862fa5c33f1f894503346b89898a01'>daemon: Loop over ‘copy_file_range’ upon short writes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>