utility for stripping debug info out of libs

build.bat

@@ -119,6 +119,7 @@ if "%textperf%"=="1"                   set didbuild=1 && %compile% ..\src\scratc
 if "%convertperf%"=="1"                set didbuild=1 && %compile% ..\src\scratch\convertperf.c                              %compile_link% %out%convertperf.exe || exit /b 1
 if "%debugstringperf%"=="1"            set didbuild=1 && %compile% ..\src\scratch\debugstringperf.c                          %compile_link% %out%debugstringperf.exe || exit /b 1
 if "%parse_inline_sites%"=="1"         set didbuild=1 && %compile% ..\src\scratch\parse_inline_sites.c                       %compile_link% %out%parse_inline_sites.exe || exit /b 1
+if "%strip_lib_debug%"=="1"            set didbuild=1 && %compile% ..\src\strip_lib_debug\strip_lib_debug.c                  %compile_link% %out%strip_lib_debug.exe || exit /b 1
 if "%mule_main%"=="1"                  set didbuild=1 && del vc*.pdb mule*.pdb && %compile_release% %only_compile% ..\src\mule\mule_inline.cpp && %compile_release% %only_compile% ..\src\mule\mule_o2.cpp && %compile_debug% %EHsc% ..\src\mule\mule_main.cpp ..\src\mule\mule_c.c mule_inline.obj mule_o2.obj %compile_link% %no_aslr% %out%mule_main.exe || exit /b 1
 if "%mule_module%"=="1"                set didbuild=1 && %compile% ..\src\mule\mule_module.cpp                               %compile_link% %link_dll% %out%mule_module.dll || exit /b 1
 if "%mule_hotload%"=="1"               set didbuild=1 && %compile% ..\src\mule\mule_hotload_main.c %compile_link% %out%mule_hotload.exe & %compile% ..\src\mule\mule_hotload_module_main.c %compile_link% %link_dll% %out%mule_hotload_module.dll || exit /b 1

src/strip_lib_debug/strip_lib_debug.c

@@ -0,0 +1,116 @@
+// Copyright (c) 2025 Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#define BUILD_TITLE "Epic Games Tools (R) Lib Strip Debug"
+#define BUILD_CONSOLE_INTERFACE 1
+
+////////////////////////////////
+// Headers
+
+#include "base/base_inc.h"
+#include "os/os_inc.h"
+#include "coff/coff.h"
+#include "coff/coff_parse.h"
+
+////////////////////////////////
+// Implementations
+
+#include "base/base_inc.c"
+#include "os/os_inc.c"
+#include "coff/coff.c"
+#include "coff/coff_parse.c"
+
+internal void
+sld_main(CmdLine *cmdl)
+{
+  B32 do_help = cmd_line_has_flag(cmdl, str8_lit("help")) ||
+                cmd_line_has_flag(cmdl, str8_lit("h"))    ||
+                cmd_line_has_flag(cmdl, str8_lit("?"))    ||
+                cmdl->argc == 1;
+  if (do_help) {    fprintf(stderr, "--- Help ---------------------------------------------------------------------\n");
+    fprintf(stderr, " %s\n\n", BUILD_TITLE_STRING_LITERAL);
+    fprintf(stderr, " Usage: strip_lib_debug [Options]\n\n");
+    fprintf(stderr, " Options:\n");
+    fprintf(stderr, "  -in:<path>  Path to input lib file\n");
+    fprintf(stderr, "  -out:<path> Path to output lib file\n");
+    os_abort(0);
+  }
+
+  Temp scratch = scratch_begin(0,0);
+
+  String8 in_lib_path  = cmd_line_string(cmdl, str8_lit("in"));
+  String8 out_lib_path = cmd_line_string(cmdl, str8_lit("out"));
+
+  if (in_lib_path.size == 0) {
+    fprintf(stderr, "ERROR: please provide an input path via -in:<path>\n");
+    os_abort(1);
+  }
+  if (out_lib_path.size == 0) {
+    fprintf(stderr, "ERROR: please provide an output path via -out:<path>\n");
+    os_abort(1);
+  }
+
+  String8 in_lib = os_data_from_file_path(scratch.arena, in_lib_path);
+  if (in_lib.size == 0) {
+    fprintf(stderr, "ERROR: unable to read file %.*s\n", str8_varg(in_lib_path));
+    os_abort(1);
+  }
+
+  if (!coff_is_regular_archive(in_lib)) {
+    fprintf(stderr, "ERROR: input lib is not COFF archive\n");
+    os_abort(1);
+  }
+
+  // read & parse lib
+  String8           out_lib = push_str8_copy(scratch.arena, in_lib);
+  COFF_ArchiveParse parse   = coff_archive_parse_from_data(out_lib);
+
+  // was parse successful?
+  if (parse.error.size) {
+    fprintf(stderr, "ERROR: %.*s: %.*s\n", str8_varg(in_lib_path), str8_varg(parse.error));
+    os_abort(1);
+  }
+
+  // convert big endian offsets
+  U32  member_offsets_count = parse.first_member.symbol_count;
+  U32 *member_offsets       = push_array(scratch.arena, U32, parse.first_member.member_offset_count);
+  for (U32 offset_idx = 0; offset_idx < member_offsets_count; offset_idx += 1) {
+    member_offsets[offset_idx] = from_be_u32(parse.first_member.member_offsets[offset_idx]);
+  }
+
+  // fixup sections
+  for (U64 member_idx = 0; member_idx < member_offsets_count; member_idx += 1) {
+    COFF_ParsedArchiveMemberHeader member_header = {0};
+    coff_parse_archive_member_header(out_lib, member_offsets[member_idx], &member_header);
+    String8       member_data = str8_substr(out_lib, member_header.data_range);
+    COFF_DataType member_type = coff_data_type_from_data(member_data);
+    if (member_type == COFF_DataType_BigObj || member_type == COFF_DataType_Obj) {
+      COFF_FileHeaderInfo  file_header_info = coff_file_header_info_from_data(member_data);
+      COFF_SectionHeader  *section_table    = (COFF_SectionHeader *)str8_substr(member_data, file_header_info.section_table_range).str;
+      String8              string_table     = str8_substr(member_data, file_header_info.string_table_range);
+      for (U64 sect_idx = 0; sect_idx < file_header_info.section_count_no_null; sect_idx += 1) {
+        COFF_SectionHeader *sect_header = &section_table[sect_idx];
+        String8             name        = coff_name_from_section_header(string_table, sect_header);
+        if (str8_match(str8_lit(".debug$S"), name, 0) || str8_match(str8_lit(".debug$T"), name, 0)) {
+          sect_header->flags = COFF_SectionFlag_LnkRemove;
+          MemorySet(sect_header->name, 'x', sizeof(sect_header->name));
+        }
+      }
+    }
+  }
+
+  // wirte modified library
+  if (!os_write_data_to_file_path(out_lib_path, out_lib)) {
+    fprintf(stderr, "ERROR: unable to write output file to %.*s\n", str8_varg(out_lib_path));
+    os_abort(1);
+  }
+
+  scratch_end(scratch);
+}
+
+internal void
+entry_point(CmdLine *cmdl)
+{
+  sld_main(cmdl);
+}
+