Build fails with LTO

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](https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/files/15195035/build.log)

Start by reproducing the LTO build with the flags in the report, then inspect src/liboslexec/llvm_instance.cpp, batched_llvm_instance.cpp, osogram.y, oslgram.y, and the generated parser and lexer files named in the diagnostics. Compare the conflicting definitions reported by the compiler and trace their build entry points. Done means the LTO build completes without the reported ODR errors.

Written by the indexing model from the issue text.