Build fails with LTO

まず、レポートに記載されたフラグでLTOビルドを再現し、その後 src/liboslexec/llvm_instance.cpp、batched_llvm_instance.cpp、osogram.y、oslgram.y、および診断に記載された生成済みのparserとlexerのファイルを調査します。コンパイラが報告した競合する定義を比較し、それらのビルドエントリポイントをたどります。LTOビルドが報告されたODRエラーなしで完了すれば完了です。

I tried to build with the following *FLAGS to optimize the build: -flto=4 -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing

Note the -Werror=* flags are used to help detect cases where the compiler tries to optimize by assuming UB cannot exist in the source code -- if it does exist, ordinarily the code would be miscompiled, and this says to make the miscompilation a fatal error.

I got this error:

[164/173] : && /usr/bin/x86_64-pc-linux-gnu-g++ -fPIC -march=native -fstack-protector-all -O2 -pipe -fdiagnostics-color=always -frecord-gcc-switches -flto=4 -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing  -Wformat -Werror=format-security -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS  -Wl,-O1 -Wl,--as-needed -flto=4 -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing -Wl,--defsym=__gentoo_check_ldflags__=0  -Wl,--version-script=/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/build-scripts/hidesymbols.map  -Wl,--exclude-libs,ALL -shared -Wl,-soname,liboslexec.so.1.14.1 -o lib/liboslexec.so.1.14.1 src/liboslexec/CMakeFiles/oslexec.dir/shadingsys.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/closure.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/dictionary.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/context.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/loadshader.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/master.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opcolor.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opfmt.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opmatrix.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opmessage.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opnoise.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opspline.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opstring.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/optexture.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/oslexec.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/pointcloud.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/rendservices.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/constfold.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/runtimeoptimize.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/typespec.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/lpexp.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/lpeparse.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/automata.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/accum.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opclosure.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/shadeimage.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/backendllvm.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_gen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_util.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/rs_fallback.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/journal.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_analysis.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_backendllvm.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_llvm_gen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_llvm_instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_rendservices.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/ast.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/codegen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/oslcomp.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/symtab.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/typecheck.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osogram.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osolex.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/oslgram.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osllex.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osl_llvm_compiled_ops.bc.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osl_llvm_compiled_rs_dependent_ops.bc.cpp.o -L/usr/lib/llvm/17/lib64 -Wl,-rpath,/usr/lib/llvm/17/lib64:/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/lib:  lib/liboslquery.so.1.14.1  lib/liboslnoise.so.1.14.1  /usr/lib64/libOpenImageIO.so.2.5.9  -lm  /usr/lib64/libboost_filesystem.so  /usr/lib64/libboost_system.so  /usr/lib64/libboost_thread.so  /usr/lib64/libboost_chrono.so  /usr/lib64/libboost_atomic.so  -ldl  /usr/lib/llvm/17/lib64/libclang-cpp.so  /usr/lib/llvm/17/lib64/libLLVM-17.0.6.so  /usr/lib64/libOpenImageIO_Util.so.2.5.9  /usr/lib64/libImath-3_1.so.29.10.0  -lm  /usr/lib64/libpugixml.so.1.14 && :
FAILED: lib/liboslexec.so.1.14.1 
: && /usr/bin/x86_64-pc-linux-gnu-g++ -fPIC -march=native -fstack-protector-all -O2 -pipe -fdiagnostics-color=always -frecord-gcc-switches -flto=4 -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing  -Wformat -Werror=format-security -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS  -Wl,-O1 -Wl,--as-needed -flto=4 -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing -Wl,--defsym=__gentoo_check_ldflags__=0  -Wl,--version-script=/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/build-scripts/hidesymbols.map  -Wl,--exclude-libs,ALL -shared -Wl,-soname,liboslexec.so.1.14.1 -o lib/liboslexec.so.1.14.1 src/liboslexec/CMakeFiles/oslexec.dir/shadingsys.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/closure.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/dictionary.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/context.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/loadshader.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/master.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opcolor.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opfmt.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opmatrix.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opmessage.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opnoise.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opspline.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opstring.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/optexture.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/oslexec.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/pointcloud.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/rendservices.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/constfold.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/runtimeoptimize.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/typespec.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/lpexp.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/lpeparse.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/automata.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/accum.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/opclosure.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/shadeimage.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/backendllvm.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_gen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/llvm_util.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/rs_fallback.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/journal.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_analysis.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_backendllvm.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_llvm_gen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_llvm_instance.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/batched_rendservices.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/ast.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/codegen.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/oslcomp.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/symtab.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/__/liboslcomp/typecheck.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osogram.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osolex.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/oslgram.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osllex.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osl_llvm_compiled_ops.bc.cpp.o src/liboslexec/CMakeFiles/oslexec.dir/osl_llvm_compiled_rs_dependent_ops.bc.cpp.o -L/usr/lib/llvm/17/lib64 -Wl,-rpath,/usr/lib/llvm/17/lib64:/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/lib:  lib/liboslquery.so.1.14.1  lib/liboslnoise.so.1.14.1  /usr/lib64/libOpenImageIO.so.2.5.9  -lm  /usr/lib64/libboost_filesystem.so  /usr/lib64/libboost_system.so  /usr/lib64/libboost_thread.so  /usr/lib64/libboost_chrono.so  /usr/lib64/libboost_atomic.so  -ldl  /usr/lib/llvm/17/lib64/libclang-cpp.so  /usr/lib/llvm/17/lib64/libLLVM-17.0.6.so  /usr/lib64/libOpenImageIO_Util.so.2.5.9  /usr/lib64/libImath-3_1.so.29.10.0  -lm  /usr/lib64/libpugixml.so.1.14 && :
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/llvm_instance.cpp:150:8: error: type ‘struct HelperFuncRecord’ violates the C++ One Definition Rule [-Werror=odr]
  150 | struct HelperFuncRecord {
      |        ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/batched_llvm_instance.cpp:168:8: note: a different type is defined in another translation unit
  168 | struct HelperFuncRecord {
      |        ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/batched_llvm_instance.cpp:171:9: note: the first difference of corresponding definitions is field ‘vector_width’
  171 |     int vector_width;
      |         ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/batched_llvm_instance.cpp:168:8: note: a type with different number of fields is defined in another translation unit
  168 | struct HelperFuncRecord {
      |        ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osogram.hpp:82:7: error: type ‘union YYSTYPE’ violates the C++ One Definition Rule [-Werror=odr]
   82 | union YYSTYPE
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/oslgram.hpp:113:7: note: a different type is defined in another translation unit
  113 | union YYSTYPE
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/osogram.y:47:17: note: the first difference of corresponding definitions is field ‘s’
   47 |     const char *s;  // For string values -- guaranteed to be a ustring.c_str()
      |                 ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/../liboslcomp/oslgram.y:50:17: note: a field with different name is defined in another translation unit
   50 |     ASTNode    *n;  // Abstract Syntax Tree node
      |                 ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osogram.cpp:474:7: error: type ‘union yyalloc’ violates the C++ One Definition Rule [-Werror=odr]
  474 | union yyalloc
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/oslgram.cpp:565:7: note: a different type is defined in another translation unit
  565 | union yyalloc
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osogram.cpp:476:14: note: the first difference of corresponding definitions is field ‘yyss_alloc’
  476 |   yy_state_t yyss_alloc;
      |              ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/oslgram.cpp:567:14: note: a field of same name but different type is defined in another translation unit
  567 |   yy_state_t yyss_alloc;
      |              ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osolex.cpp:931:8: error: type ‘struct yyguts_t’ violates the C++ One Definition Rule [-Werror=odr]
  931 | /* Holds the entire state of the reentrant scanner. */
      |        ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osllex.cpp:957:8: note: a different type is defined in another translation unit
  957 | /* Holds the entire state of the reentrant scanner. */
      |        ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osolex.cpp:935:19: note: the first difference of corresponding definitions is field ‘yyextra_r’
  935 |     /* User-defined. Not touched by flex. */
      |                   ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osllex.cpp:961:19: note: a field of same name but different type is defined in another translation unit
  961 |     /* User-defined. Not touched by flex. */
      |                   ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/osoreader.h:27:7: note: type name ‘OSL_v1_14_1::pvt::OSOReader’ should match type name ‘OSL_v1_14_1::pvt::OSLCompilerImpl’
   27 | class OSOReader {
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/../liboslcomp/oslcomp_pvt.h:36:7: note: the incompatible type is defined here
   36 | class OSLCompilerImpl {
      |       ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:118:1: error: type of ‘osl_allocate_weighted_closure_component’ does not match original declaration [-Werror=lto-type-mismatch]
  118 | DECL(osl_allocate_weighted_closure_component, "CXiiX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:64:1: note: return value type mismatch
   64 | osl_allocate_weighted_closure_component(ShaderGlobals* sg, int id, int size,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:64:1: note: ‘osl_allocate_weighted_closure_component’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:117:1: error: type of ‘osl_allocate_closure_component’ does not match original declaration [-Werror=lto-type-mismatch]
  117 | DECL(osl_allocate_closure_component, "CXii")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:56:1: note: return value type mismatch
   56 | osl_allocate_closure_component(ShaderGlobals* sg, int id, int size)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:56:1: note: ‘osl_allocate_closure_component’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:115:1: error: type of ‘osl_mul_closure_float’ does not match original declaration [-Werror=lto-type-mismatch]
  115 | DECL(osl_mul_closure_float, "CXCf")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:43:1: note: return value type mismatch
   43 | osl_mul_closure_float(ShaderGlobals* sg, ClosureColor* a, float w)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:43:1: note: ‘osl_mul_closure_float’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:116:1: error: type of ‘osl_mul_closure_color’ does not match original declaration [-Werror=lto-type-mismatch]
  116 | DECL(osl_mul_closure_color, "CXCc")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:30:1: note: return value type mismatch
   30 | osl_mul_closure_color(ShaderGlobals* sg, ClosureColor* a, const Color3* w)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:30:1: note: ‘osl_mul_closure_color’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:114:1: error: type of ‘osl_add_closure_closure’ does not match original declaration [-Werror=lto-type-mismatch]
  114 | DECL(osl_add_closure_closure, "CXCC")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:18:1: note: return value type mismatch
   18 | osl_add_closure_closure(ShaderGlobals* sg, const ClosureColor* a,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:18:1: note: ‘osl_add_closure_closure’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:120:1: error: type of ‘osl_closure_to_ustringhash’ does not match original declaration [-Werror=lto-type-mismatch]
  120 | DECL(osl_closure_to_ustringhash, "hXC")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:85:1: note: return value type mismatch
   85 | osl_closure_to_ustringhash(ShaderGlobals* sg, ClosureColor* c)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:85:1: note: type ‘ustringhash_pod’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:85:1: note: ‘osl_closure_to_ustringhash’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:119:1: error: type of ‘osl_closure_to_string’ does not match original declaration [-Werror=lto-type-mismatch]
  119 | DECL(osl_closure_to_string, "sXC")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:74:1: note: return value type mismatch
   74 | osl_closure_to_string(ShaderGlobals* sg, ClosureColor* c)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/opclosure.cpp:74:1: note: ‘osl_closure_to_string’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:206:1: error: type of ‘osl_pointcloud_write’ does not match original declaration [-Werror=lto-type-mismatch]
  206 | DECL(osl_pointcloud_write, "iXhXiXXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:474:1: note: return value type mismatch
  474 | osl_pointcloud_write(ShaderGlobals* sg, ustringhash_pod filename_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:474:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:474:1: note: ‘osl_pointcloud_write’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:207:1: error: type of ‘osl_pointcloud_write_helper’ does not match original declaration [-Werror=lto-type-mismatch]
  207 | DECL(osl_pointcloud_write_helper, "xXXXihLX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:460:1: note: type mismatch in parameter 1
  460 | osl_pointcloud_write_helper(ustringhash_pod* names_, TypeDesc* types,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:460:1: note: ‘osl_pointcloud_write_helper’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:205:1: error: type of ‘osl_pointcloud_get’ does not match original declaration [-Werror=lto-type-mismatch]
  205 | DECL(osl_pointcloud_get, "iXhXihLX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:436:1: note: return value type mismatch
  436 | osl_pointcloud_get(ShaderGlobals* sg, ustringhash_pod filename_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:436:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:436:1: note: ‘osl_pointcloud_get’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:204:1: error: type of ‘osl_pointcloud_search’ does not match original declaration [-Werror=lto-type-mismatch]
  204 | DECL(osl_pointcloud_search, "iXhXfiiXXii*")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:383:1: note: return value type mismatch
  383 | osl_pointcloud_search(ShaderGlobals* sg, ustringhash_pod filename_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:383:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/pointcloud.cpp:383:1: note: ‘osl_pointcloud_search’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:410:1: error: type of ‘osl_trace’ does not match original declaration [-Werror=lto-type-mismatch]
  410 | DECL(osl_trace, "iXXXXXXXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:497:1: note: return value type mismatch
  497 | osl_trace(void* sg_, void* opt_, void* Pos_, void* dPosdx_, void* dPosdy_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:497:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:497:1: note: ‘osl_trace’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:409:1: error: type of ‘osl_trace_set_traceset’ does not match original declaration [-Werror=lto-type-mismatch]
  409 | DECL(osl_trace_set_traceset, "xXh")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:490:1: note: type mismatch in parameter 1
  490 | osl_trace_set_traceset(void* opt, const ustringhash_pod x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:490:1: note: ‘osl_trace_set_traceset’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:408:1: error: type of ‘osl_trace_set_shade’ does not match original declaration [-Werror=lto-type-mismatch]
  408 | DECL(osl_trace_set_shade, "xXi")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:483:1: note: type mismatch in parameter 1
  483 | osl_trace_set_shade(void* opt, int x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:483:1: note: ‘osl_trace_set_shade’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:407:1: error: type of ‘osl_trace_set_maxdist’ does not match original declaration [-Werror=lto-type-mismatch]
  407 | DECL(osl_trace_set_maxdist, "xXf")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:477:1: note: type mismatch in parameter 1
  477 | osl_trace_set_maxdist(void* opt, float x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:477:1: note: ‘osl_trace_set_maxdist’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:406:1: error: type of ‘osl_trace_set_mindist’ does not match original declaration [-Werror=lto-type-mismatch]
  406 | DECL(osl_trace_set_mindist, "xXf")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:471:1: note: type mismatch in parameter 1
  471 | osl_trace_set_mindist(void* opt, float x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:471:1: note: ‘osl_trace_set_mindist’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:242:1: error: type of ‘osl_get_trace_options’ does not match original declaration [-Werror=lto-type-mismatch]
  242 | DECL(osl_get_trace_options, "XX");
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:462:1: note: return value type mismatch
  462 | osl_get_trace_options(void* sg_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:462:1: note: ‘osl_get_trace_options’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:404:1: error: type of ‘osl_get_textureinfo_st’ does not match original declaration [-Werror=lto-type-mismatch]
  404 | DECL(osl_get_textureinfo_st, "iXhXffhiiiXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:430:1: note: return value type mismatch
  430 | osl_get_textureinfo_st(void* sg_, ustringhash_pod name_, void* handle, float s,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:430:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:430:1: note: ‘osl_get_textureinfo_st’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:403:1: error: type of ‘osl_get_textureinfo’ does not match original declaration [-Werror=lto-type-mismatch]
  403 | DECL(osl_get_textureinfo, "iXhXhiiiXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:403:1: note: return value type mismatch
  403 | osl_get_textureinfo(void* sg_, ustringhash_pod name_, void* handle,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:403:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:403:1: note: ‘osl_get_textureinfo’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:402:1: error: type of ‘osl_environment’ does not match original declaration [-Werror=lto-type-mismatch]
  402 | DECL(osl_environment, "iXhXXXXXiXXXXXXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:349:1: note: return value type mismatch
  349 | osl_environment(void* sg_, ustringhash_pod name_, void* handle, void* opt_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:349:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:349:1: note: ‘osl_environment’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:401:1: error: type of ‘osl_texture3d’ does not match original declaration [-Werror=lto-type-mismatch]
  401 | DECL(osl_texture3d, "iXhXXXXXXiXXXXXXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:286:1: note: return value type mismatch
  286 | osl_texture3d(void* sg_, ustringhash_pod name_, void* handle, void* opt_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:286:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:286:1: note: ‘osl_texture3d’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:400:1: error: type of ‘osl_texture’ does not match original declaration [-Werror=lto-type-mismatch]
  400 | DECL(osl_texture, "iXhXXffffffiXXXXXXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:232:1: note: return value type mismatch
  232 | osl_texture(void* sg_, ustringhash_pod name_, void* handle, void* opt_, float s,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:232:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:232:1: note: ‘osl_texture’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:399:1: error: type of ‘osl_texture_set_missingcolor_alpha’ does not match original declaration [-Werror=lto-type-mismatch]
  399 | DECL(osl_texture_set_missingcolor_alpha, "xXif")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:221:1: note: type mismatch in parameter 1
  221 | osl_texture_set_missingcolor_alpha(void* opt, int alphaindex,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:221:1: note: ‘osl_texture_set_missingcolor_alpha’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:398:1: error: type of ‘osl_texture_set_missingcolor_arena’ does not match original declaration [-Werror=lto-type-mismatch]
  398 | DECL(osl_texture_set_missingcolor_arena, "xXX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:215:1: note: type mismatch in parameter 1
  215 | osl_texture_set_missingcolor_arena(void* opt, const void* missing)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:215:1: note: ‘osl_texture_set_missingcolor_arena’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:397:1: error: type of ‘osl_texture_set_subimagename’ does not match original declaration [-Werror=lto-type-mismatch]
  397 | DECL(osl_texture_set_subimagename, "xXh")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:207:1: note: type mismatch in parameter 1
  207 | osl_texture_set_subimagename(void* opt, ustringhash_pod subimagename_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:207:1: note: ‘osl_texture_set_subimagename’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:396:1: error: type of ‘osl_texture_set_subimage’ does not match original declaration [-Werror=lto-type-mismatch]
  396 | DECL(osl_texture_set_subimage, "xXi")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:200:1: note: type mismatch in parameter 1
  200 | osl_texture_set_subimage(void* opt, int subimage)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:200:1: note: ‘osl_texture_set_subimage’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:395:1: error: type of ‘osl_texture_set_interp_code’ does not match original declaration [-Werror=lto-type-mismatch]
  395 | DECL(osl_texture_set_interp_code, "xXi")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:194:1: note: type mismatch in parameter 1
  194 | osl_texture_set_interp_code(void* opt, int mode)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:194:1: note: ‘osl_texture_set_interp_code’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:394:1: error: type of ‘osl_texture_set_interp’ does not match original declaration [-Werror=lto-type-mismatch]
  394 | DECL(osl_texture_set_interp, "xXh")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:184:1: note: type mismatch in parameter 1
  184 | osl_texture_set_interp(void* opt, ustringhash_pod modename_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:184:1: note: ‘osl_texture_set_interp’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:373:1: error: type of ‘osl_texture_decode_interpmode’ does not match original declaration [-Werror=lto-type-mismatch]
  373 | DECL(osl_texture_decode_interpmode, "ih");
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:177:1: note: return value type mismatch
  177 | osl_texture_decode_interpmode(ustringhash_pod name_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:177:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:177:1: note: ‘osl_texture_decode_interpmode’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:393:1: error: type of ‘osl_texture_set_time’ does not match original declaration [-Werror=lto-type-mismatch]
  393 | DECL(osl_texture_set_time, "xXf")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:171:1: note: type mismatch in parameter 1
  171 | osl_texture_set_time(void* opt, float x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:171:1: note: ‘osl_texture_set_time’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:392:1: error: type of ‘osl_texture_set_fill’ does not match original declaration [-Werror=lto-type-mismatch]
  392 | DECL(osl_texture_set_fill, "xXf")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:165:1: note: type mismatch in parameter 1
  165 | osl_texture_set_fill(void* opt, float x)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/optexture.cpp:165:1: note: ‘osl_texture_set_fill’ was previously declared here

[... and much more, but "There was an error creating your Issue: body is too long (maximum is 65536 characters)." so...]

/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:235:1: error: type of ‘osl_naninf_check’ does not match original declaration [-Werror=lto-type-mismatch]
  235 | DECL(osl_naninf_check, "xiXiXhihiih")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4591:1: note: type mismatch in parameter 1
 4591 | osl_naninf_check(int ncomps, const void* vals_, int has_derivs, void* sg,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4591:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4591:1: note: ‘osl_naninf_check’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:239:1: error: type of ‘osl_incr_get_userdata_calls’ does not match original declaration [-Werror=lto-type-mismatch]
  239 | DECL(osl_incr_get_userdata_calls, "xX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4774:1: note: type mismatch in parameter 1
 4774 | osl_incr_get_userdata_calls(void* sg_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4774:1: note: ‘osl_incr_get_userdata_calls’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:238:1: error: type of ‘osl_bind_interpolated_param’ does not match original declaration [-Werror=lto-type-mismatch]
  238 | DECL(osl_bind_interpolated_param, "iXhLiXiXiXi")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4735:1: note: return value type mismatch
 4735 | osl_bind_interpolated_param(void* sg_, ustringhash_pod name_, long long type,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4735:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4735:1: note: ‘osl_bind_interpolated_param’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:237:1: error: type of ‘osl_get_attribute’ does not match original declaration [-Werror=lto-type-mismatch]
  237 | DECL(osl_get_attribute, "iXihhiiLX")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4719:1: note: return value type mismatch
 4719 | osl_get_attribute(void* sg_, int dest_derivs, ustringhash_pod obj_name_,
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4719:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4719:1: note: ‘osl_get_attribute’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/builtindecl.h:230:1: error: type of ‘osl_raytype_name’ does not match original declaration [-Werror=lto-type-mismatch]
  230 | DECL(osl_raytype_name, "iXh")
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4708:1: note: return value type mismatch
 4708 | osl_raytype_name(void* sg_, ustringhash_pod name_)
      | ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4708:1: note: type ‘int’ should match type ‘void’
/var/tmp/portage/media-libs/osl-9999/work/osl-9999/src/liboslexec/shadingsys.cpp:4708:1: note: ‘osl_raytype_name’ was previously declared here
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osogram.cpp:126:6: error: type ‘yysymbol_kind_t’ violates the C++ One Definition Rule [-Werror=odr]
  126 | enum yysymbol_kind_t
      |      ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/oslgram.cpp:129:6: note: an enum with different value name is defined in another translation unit
  129 | enum yysymbol_kind_t
      |      ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/osogram.cpp:134:3: note: name ‘YYSYMBOL_HINT’ differs from name ‘YYSYMBOL_INT_LITERAL’ defined in another translation unit
  134 |   YYSYMBOL_HINT = 5,                       /* HINT  */
      |   ^
/var/tmp/portage/media-libs/osl-9999/work/osl-9999_build/src/liboslexec/oslgram.cpp:137:3: note: mismatching definition
  137 |   YYSYMBOL_INT_LITERAL = 5,                /* INT_LITERAL  */
      |   ^
lto1: some warnings being treated as errors
lto-wrapper: fatal error: /usr/bin/x86_64-pc-linux-gnu-g++ returned 1 exit status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/13/../../../../x86_64-pc-linux-gnu/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Originally reported downstream: https://bugs.gentoo.org/875836
Full build log: build.log