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Re: [RFC] Dealing with ODR violations in GCC


On Fri, Sep 12, 2014 at 7:40 AM, Jan Hubicka <hubicka@ucw.cz> wrote:
> Hi,
> I went through excercise of running LTO bootstrap with ODR verification on.  There are some typename clashes
> I guess we want to fix.  I wonder what approach is preferred, do we want to introduce anonymous
> namespaces for those?

For passes you could put them into pass class scope.  Anonymous
namespaces would work as well but I don't like them very much
and for this it sounds like an abuse of them.

Prefixing/renaming the names is possible as well, of course.

Richard.

> Honza
>
> ../../gcc/tlink.c:62:16: warning: type âstruct file_hash_entryâ violates one definition rule [-Wodr]
>  typedef struct file_hash_entry
>                 ^
> ../../libcpp/files.c:143:8: note: a different type is defined in another translation unit
>  struct file_hash_entry
>         ^
> ../../gcc/tlink.c:64:15: note: the first difference of corresponding definitions is field âkeyâ
>    const char *key;
>                ^
> ../../libcpp/files.c:145:27: note: a field with different name is defined in another translation unit
>    struct file_hash_entry *next;
>                            ^
> ../../gcc/ipa-devirt.c:2674:0: warning: type âstruct type_change_infoâ violates one definition rule [-Wodr]
>  struct type_change_info
>  ^
> ../../gcc/ipa-prop.c:595:0: note: a different type is defined in another translation unit
>  struct type_change_info
>  ^
> ../../gcc/ipa-devirt.c:2681:0: note: the first difference of corresponding definitions is field âinstanceâ
>    tree instance;
>  ^
> ../../gcc/ipa-prop.c:602:0: note: a field with different name is defined in another translation unit
>    tree object;
>  ^
> ../../gcc/gcse.c:294:0: warning: type âstruct occrâ violates one definition rule [-Wodr]
>  struct occr
>  ^
> ../../gcc/postreload-gcse.c:160:0: note: a different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/gcse.c:297:0: note: the first difference of corresponding definitions is field ânextâ
>    struct occr *next;
>  ^
> ../../gcc/postreload-gcse.c:163:0: note: a field of same name but different type is defined in another translation unit
>    struct occr *next;
>  ^
> ../../gcc/gcse.c:259:0: warning: type âstruct exprâ violates one definition rule [-Wodr]
>  struct expr
>  ^
> ../../gcc/postreload-gcse.c:92:0: note: a different type is defined in another translation unit
>  struct expr
>  ^
> ../../gcc/gcse.c:264:0: note: the first difference of corresponding definitions is field âbitmap_indexâ
>    int bitmap_index;
>  ^
> ../../gcc/postreload-gcse.c:98:0: note: a field with different name is defined in another translation unit
>    hashval_t hash;
>  ^
> ../../gcc/predict.c:2499:0: warning: type âstruct block_info_defâ violates one definition rule [-Wodr]
>  typedef struct block_info_def
>  ^
> ../../gcc/reg-stack.c:208:0: note: a different type is defined in another translation unit
>  typedef struct block_info_def
>  ^
> ../../gcc/predict.c:2502:0: note: the first difference of corresponding definitions is field âfrequencyâ
>    sreal frequency;
>  ^
> ../../gcc/reg-stack.c:210:0: note: a field with different name is defined in another translation unit
>    struct stack_def stack_in; /* Input stack configuration.  */
>  ^
> ../../gcc/lra-eliminations.c:80:0: warning: type âstruct elim_tableâ violates one definition rule [-Wodr]
>  struct elim_table
>  ^
> ../../gcc/reload1.c:264:0: note: a different type is defined in another translation unit
>  struct elim_table
>  ^
> ../../gcc/lra-eliminations.c:88:0: note: the first difference of corresponding definitions is field âprevious_offsetâ
>    HOST_WIDE_INT previous_offset;
>  ^
> ../../gcc/reload1.c:268:0: note: a field with different name is defined in another translation unit
>    HOST_WIDE_INT initial_offset; /* Initial difference between values.  */
>  ^
> ../../gcc/tree-ssa-ccp.c:169:0: warning: type âstruct prop_value_dâ violates one definition rule [-Wodr]
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-copy.c:79:0: note: a different type is defined in another translation unit
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-ccp.c:171:0: note: the first difference of corresponding definitions is field âlattice_valâ
>      ccp_lattice_t lattice_val;
>  ^
> ../../gcc/tree-ssa-copy.c:81:0: note: a field with different name is defined in another translation unit
>      tree value;
>  ^
> ../../gcc/profile.h:26:0: warning: type âstruct edge_infoâ violates one definition rule [-Wodr]
>  struct edge_info
>  ^
> ../../gcc/tree-ssa-dom.c:113:0: note: a different type is defined in another translation unit
>  struct edge_info
>  ^
> ../../gcc/profile.h:28:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid:1;
>  ^
> ../../gcc/tree-ssa-dom.c:117:0: note: a field with different name is defined in another translation unit
>    tree lhs;
>  ^
> ../../gcc/tree-ssa-loop-im.c:119:0: warning: type âstruct mem_refâ violates one definition rule [-Wodr]
>  typedef struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:271:0: note: a different type is defined in another translation unit
>  struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-im.c:121:0: note: the first difference of corresponding definitions is field âidâ
>    unsigned id;   /* ID assigned to the memory reference
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:273:0: note: a field with different name is defined in another translation unit
>    gimple stmt;   /* Statement in that the reference appears.  */
>  ^
> ../../gcc/bitmap.c:2146:8: warning: type âstruct output_infoâ violates one definition rule [-Wodr]
>  struct output_info
>         ^
> ../../gcc/alloc-pool.c:342:0: note: a different type is defined in another translation unit
>  struct output_info
>  ^
> ../../gcc/bitmap.c:2148:12: note: the first difference of corresponding definitions is field âsizeâ
>    uint64_t size;
>             ^
> ../../gcc/alloc-pool.c:344:0: note: a field with different name is defined in another translation unit
>    unsigned long total_created;
>  ^
> ../../gcc/gcse.c:320:0: warning: type âstruct hash_table_dâ violates one definition rule [-Wodr]
>  struct hash_table_d
>  ^
> ../../gcc/cprop.c:96:0: note: a different type is defined in another translation unit
>  struct hash_table_d
>  ^
> ../../gcc/gcse.c:324:0: note: the first difference of corresponding definitions is field âtableâ
>    struct expr **table;
>  ^
> ../../gcc/cprop.c:100:0: note: a field of same name but different type is defined in another translation unit
>    struct expr **table;
>  ^
> ../../gcc/profile.c:77:0: warning: type âstruct bb_infoâ violates one definition rule [-Wodr]
>  struct bb_info {
>  ^
> ../../gcc/dse.c:424:0: note: a different type is defined in another translation unit
>  struct bb_info
>  ^
> ../../gcc/profile.c:78:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid : 1;
>  ^
> ../../gcc/dse.c:430:0: note: a field with different name is defined in another translation unit
>    insn_info_t last_insn;
>  ^
> ../../gcc/tree-ssa-structalias.c:1526:0: warning: type âstruct topo_infoâ violates one definition rule [-Wodr]
>  struct topo_info
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a different type is defined in another translation unit
>  {
>  ^
> ../../gcc/tree-ssa-structalias.c:1529:0: note: the first difference of corresponding definitions is field âvisitedâ
>    sbitmap visited;
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a field with different name is defined in another translation unit
>  {
>  ^
> ../../gcc/ggc-common.c:945:0: warning: type âstruct ptr_hash_entryâ violates one definition rule [-Wodr]
>  struct ptr_hash_entry
>  ^
> ../../gcc/vec.c:83:0: note: a different type is defined in another translation unit
>    void *ptr;
>  ^
> ../../gcc/ggc-common.c:948:0: note: the first difference of corresponding definitions is field âlocâ
>    struct loc_descriptor *loc;
>  ^
> ../../gcc/vec.c:83:0: note: a field of same name but different type is defined in another translation unit
>    void *ptr;
>  ^
> ../../gcc/cp/mangle.c:93:0: warning: type âstruct globalsâ violates one definition rule [-Wodr]
>  typedef struct GTY(()) globals {
>  ^
> ../../gcc/ggc-page.c:381:0: note: a different type is defined in another translation unit
>  static struct globals
>  ^
> ../../gcc/cp/mangle.c:96:0: note: the first difference of corresponding definitions is field âsubstitutionsâ
>    vec<tree, va_gc> *substitutions;
>  ^
> ../../gcc/ggc-page.c:387:0: note: a field with different name is defined in another translation unit
>    page_entry *pages[NUM_ORDERS];
>  ^
> ../../gcc/alloc-pool.c:342:0: warning: type âstruct output_infoâ violates one definition rule [-Wodr]
>  struct output_info
>  ^
> ../../gcc/bitmap.c:2146:0: note: a different type is defined in another translation unit
>  struct output_info
>  ^
> ../../gcc/alloc-pool.c:344:0: note: the first difference of corresponding definitions is field âtotal_createdâ
>    unsigned long total_created;
>  ^
> ../../gcc/bitmap.c:2148:0: note: a field with different name is defined in another translation unit
>    uint64_t size;
>  ^
> ../../gcc/ipa-devirt.c:2674:0: warning: type âstruct type_change_infoâ violates one definition rule [-Wodr]
>  struct type_change_info
>  ^
> ../../gcc/ipa-prop.c:595:0: note: a different type is defined in another translation unit
>  struct type_change_info
>  ^
> ../../gcc/ipa-devirt.c:2681:0: note: the first difference of corresponding definitions is field âinstanceâ
>    tree instance;
>  ^
> ../../gcc/ipa-prop.c:602:0: note: a field with different name is defined in another translation unit
>    tree object;
>  ^
> ../../gcc/gcse.c:294:0: warning: type âstruct occrâ violates one definition rule [-Wodr]
>  struct occr
>  ^
> ../../gcc/postreload-gcse.c:160:0: note: a different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/gcse.c:297:0: note: the first difference of corresponding definitions is field ânextâ
>    struct occr *next;
>  ^
> ../../gcc/postreload-gcse.c:163:0: note: a field of same name but different type is defined in another translation unit
>    struct occr *next;
>  ^
> ../../gcc/gcse.c:259:0: warning: type âstruct exprâ violates one definition rule [-Wodr]
>  struct expr
>  ^
> ../../gcc/postreload-gcse.c:92:0: note: a different type is defined in another translation unit
>  struct expr
>  ^
> ../../gcc/gcse.c:264:0: note: the first difference of corresponding definitions is field âbitmap_indexâ
>    int bitmap_index;
>  ^
> ../../gcc/postreload-gcse.c:98:0: note: a field with different name is defined in another translation unit
>    hashval_t hash;
>  ^
> ../../gcc/predict.c:2499:0: warning: type âstruct block_info_defâ violates one definition rule [-Wodr]
>  typedef struct block_info_def
>  ^
> ../../gcc/reg-stack.c:208:0: note: a different type is defined in another translation unit
>  typedef struct block_info_def
>  ^
> ../../gcc/predict.c:2502:0: note: the first difference of corresponding definitions is field âfrequencyâ
>    sreal frequency;
>  ^
> ../../gcc/reg-stack.c:210:0: note: a field with different name is defined in another translation unit
>    struct stack_def stack_in; /* Input stack configuration.  */
>  ^
> ../../gcc/lra-eliminations.c:80:0: warning: type âstruct elim_tableâ violates one definition rule [-Wodr]
>  struct elim_table
>  ^
> ../../gcc/reload1.c:264:0: note: a different type is defined in another translation unit
>  struct elim_table
>  ^
> ../../gcc/lra-eliminations.c:88:0: note: the first difference of corresponding definitions is field âprevious_offsetâ
>    HOST_WIDE_INT previous_offset;
>  ^
> ../../gcc/reload1.c:268:0: note: a field with different name is defined in another translation unit
>    HOST_WIDE_INT initial_offset; /* Initial difference between values.  */
>  ^
> ../../gcc/cp/semantics.c:4075:0: warning: type âstruct nrv_dataâ violates one definition rule [-Wodr]
>  struct nrv_data
>  ^
> ../../gcc/tree-nrv.c:58:0: note: a different type is defined in another translation unit
>  struct nrv_data
>  ^
> ../../gcc/cp/semantics.c:4081:0: note: the first difference of corresponding definitions is field âvisitedâ
>    hash_table<pointer_hash <tree_node> > visited;
>  ^
> ../../gcc/tree-nrv.c:67:0: note: a field with different name is defined in another translation unit
>    int modified;
>  ^
> ../../gcc/tree-ssa-ccp.c:169:0: warning: type âstruct prop_value_dâ violates one definition rule [-Wodr]
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-copy.c:79:0: note: a different type is defined in another translation unit
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-ccp.c:171:0: note: the first difference of corresponding definitions is field âlattice_valâ
>      ccp_lattice_t lattice_val;
>  ^
> ../../gcc/tree-ssa-copy.c:81:0: note: a field with different name is defined in another translation unit
>      tree value;
>  ^
> ../../gcc/profile.h:26:0: warning: type âstruct edge_infoâ violates one definition rule [-Wodr]
>  struct edge_info
>  ^
> ../../gcc/tree-ssa-dom.c:113:0: note: a different type is defined in another translation unit
>  struct edge_info
>  ^
> ../../gcc/profile.h:28:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid:1;
>  ^
> ../../gcc/tree-ssa-dom.c:117:0: note: a field with different name is defined in another translation unit
>    tree lhs;
>  ^
> ../../gcc/tree-ssa-loop-im.c:119:0: warning: type âstruct mem_refâ violates one definition rule [-Wodr]
>  typedef struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:271:0: note: a different type is defined in another translation unit
>  struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-im.c:121:0: note: the first difference of corresponding definitions is field âidâ
>    unsigned id;   /* ID assigned to the memory reference
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:273:0: note: a field with different name is defined in another translation unit
>    gimple stmt;   /* Statement in that the reference appears.  */
>  ^
> ../../gcc/gcse.c:320:0: warning: type âstruct hash_table_dâ violates one definition rule [-Wodr]
>  struct hash_table_d
>  ^
> ../../gcc/cprop.c:58:0: note: a different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/gcse.c:324:0: note: the first difference of corresponding definitions is field âtableâ
>    struct expr **table;
>  ^
> ../../gcc/cprop.c:58:0: note: a field of same name but different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/profile.c:77:0: warning: type âstruct bb_infoâ violates one definition rule [-Wodr]
>  struct bb_info {
>  ^
> ../../gcc/dse.c:1079:0: note: a different type is defined in another translation unit
>  free_read_records (bb_info_t bb_info)
>  ^
> ../../gcc/profile.c:78:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid : 1;
>  ^
> ../../gcc/dse.c:1079:0: note: a field with different name is defined in another translation unit
>  free_read_records (bb_info_t bb_info)
>  ^
> ../../gcc/tree-ssa-structalias.c:1526:0: warning: type âstruct topo_infoâ violates one definition rule [-Wodr]
>  struct topo_info
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a different type is defined in another translation unit
>  {
>  ^
> ../../gcc/tree-ssa-structalias.c:1529:0: note: the first difference of corresponding definitions is field âvisitedâ
>    sbitmap visited;
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a field with different name is defined in another translation unit
>  {
>  ^
> ../../gcc/ggc-common.c:945:0: warning: type âstruct ptr_hash_entryâ violates one definition rule [-Wodr]
>  struct ptr_hash_entry
>  ^
> ../../gcc/vec.c:83:0: note: a different type is defined in another translation unit
>    void *ptr;
>  ^
> ../../gcc/ggc-common.c:948:0: note: the first difference of corresponding definitions is field âlocâ
>    struct loc_descriptor *loc;
>  ^
> ../../gcc/vec.c:83:0: note: a field of same name but different type is defined in another translation unit
>    void *ptr;
>  ^
> ../../gcc/cp/call.c:83:8: warning: type âstruct conversionâ violates one definition rule [-Wodr]
>  struct conversion {
>         ^
> ../../libcpp/charset.c:613:0: note: a different type is defined in another translation unit
>    const char *pair;
>  ^
> ../../gcc/cp/call.c:85:19: note: the first difference of corresponding definitions is field âkindâ
>    conversion_kind kind;
>                    ^
> ../../libcpp/charset.c:613:0: note: a field with different name is defined in another translation unit
>    const char *pair;
>  ^
> ../../gcc/alloc-pool.c:342:0: warning: type âstruct output_infoâ violates one definition rule [-Wodr]
>  struct output_info
>  ^
> ../../gcc/bitmap.c:2146:0: note: a different type is defined in another translation unit
>  struct output_info
>  ^
> ../../gcc/alloc-pool.c:344:0: note: the first difference of corresponding definitions is field âtotal_createdâ
>    unsigned long total_created;
>  ^
> ../../gcc/bitmap.c:2148:0: note: a field with different name is defined in another translation unit
>    uint64_t size;
>  ^
> ../../gcc/ipa-devirt.c:2674:0: warning: type âstruct type_change_infoâ violates one definition rule [-Wodr]
>  struct type_change_info
>  ^
> ../../gcc/ipa-prop.c:595:0: note: a different type is defined in another translation unit
>  struct type_change_info
>  ^
> ../../gcc/ipa-devirt.c:2681:0: note: the first difference of corresponding definitions is field âinstanceâ
>    tree instance;
>  ^
> ../../gcc/ipa-prop.c:602:0: note: a field with different name is defined in another translation unit
>    tree object;
>  ^
> ../../gcc/gcse.c:294:0: warning: type âstruct occrâ violates one definition rule [-Wodr]
>  struct occr
>  ^
> ../../gcc/postreload-gcse.c:160:0: note: a different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/gcse.c:297:0: note: the first difference of corresponding definitions is field ânextâ
>    struct occr *next;
>  ^
> ../../gcc/postreload-gcse.c:163:0: note: a field of same name but different type is defined in another translation unit
>    struct occr *next;
>  ^
> ../../gcc/gcse.c:259:0: warning: type âstruct exprâ violates one definition rule [-Wodr]
>  struct expr
>  ^
> ../../gcc/postreload-gcse.c:92:0: note: a different type is defined in another translation unit
>  struct expr
>  ^
> ../../gcc/gcse.c:264:0: note: the first difference of corresponding definitions is field âbitmap_indexâ
>    int bitmap_index;
>  ^
> ../../gcc/postreload-gcse.c:98:0: note: a field with different name is defined in another translation unit
>    hashval_t hash;
>  ^
> ../../gcc/predict.c:2499:0: warning: type âstruct block_info_defâ violates one definition rule [-Wodr]
>  typedef struct block_info_def
>  ^
> ../../gcc/reg-stack.c:208:0: note: a different type is defined in another translation unit
>  typedef struct block_info_def
>  ^
> ../../gcc/predict.c:2502:0: note: the first difference of corresponding definitions is field âfrequencyâ
>    sreal frequency;
>  ^
> ../../gcc/reg-stack.c:210:0: note: a field with different name is defined in another translation unit
>    struct stack_def stack_in; /* Input stack configuration.  */
>  ^
> ../../gcc/lra-eliminations.c:80:0: warning: type âstruct elim_tableâ violates one definition rule [-Wodr]
>  struct elim_table
>  ^
> ../../gcc/reload1.c:264:0: note: a different type is defined in another translation unit
>  struct elim_table
>  ^
> ../../gcc/lra-eliminations.c:88:0: note: the first difference of corresponding definitions is field âprevious_offsetâ
>    HOST_WIDE_INT previous_offset;
>  ^
> ../../gcc/reload1.c:268:0: note: a field with different name is defined in another translation unit
>    HOST_WIDE_INT initial_offset; /* Initial difference between values.  */
>  ^
> ../../gcc/tree-ssa-ccp.c:169:0: warning: type âstruct prop_value_dâ violates one definition rule [-Wodr]
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-copy.c:79:0: note: a different type is defined in another translation unit
>  struct prop_value_d {
>  ^
> ../../gcc/tree-ssa-ccp.c:171:0: note: the first difference of corresponding definitions is field âlattice_valâ
>      ccp_lattice_t lattice_val;
>  ^
> ../../gcc/tree-ssa-copy.c:81:0: note: a field with different name is defined in another translation unit
>      tree value;
>  ^
> ../../gcc/profile.h:26:0: warning: type âstruct edge_infoâ violates one definition rule [-Wodr]
>  struct edge_info
>  ^
> ../../gcc/tree-ssa-dom.c:113:0: note: a different type is defined in another translation unit
>  struct edge_info
>  ^
> ../../gcc/profile.h:28:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid:1;
>  ^
> ../../gcc/tree-ssa-dom.c:117:0: note: a field with different name is defined in another translation unit
>    tree lhs;
>  ^
> ../../gcc/tree-ssa-loop-im.c:119:0: warning: type âstruct mem_refâ violates one definition rule [-Wodr]
>  typedef struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:271:0: note: a different type is defined in another translation unit
>  struct mem_ref
>  ^
> ../../gcc/tree-ssa-loop-im.c:121:0: note: the first difference of corresponding definitions is field âidâ
>    unsigned id;   /* ID assigned to the memory reference
>  ^
> ../../gcc/tree-ssa-loop-prefetch.c:273:0: note: a field with different name is defined in another translation unit
>    gimple stmt;   /* Statement in that the reference appears.  */
>  ^
> ../../gcc/gcse.c:320:0: warning: type âstruct hash_table_dâ violates one definition rule [-Wodr]
>  struct hash_table_d
>  ^
> ../../gcc/cprop.c:58:0: note: a different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/gcse.c:324:0: note: the first difference of corresponding definitions is field âtableâ
>    struct expr **table;
>  ^
> ../../gcc/cprop.c:58:0: note: a field of same name but different type is defined in another translation unit
>  struct occr
>  ^
> ../../gcc/profile.c:77:0: warning: type âstruct bb_infoâ violates one definition rule [-Wodr]
>  struct bb_info {
>  ^
> ../../gcc/dse.c:1079:0: note: a different type is defined in another translation unit
>  free_read_records (bb_info_t bb_info)
>  ^
> ../../gcc/profile.c:78:0: note: the first difference of corresponding definitions is field âcount_validâ
>    unsigned int count_valid : 1;
>  ^
> ../../gcc/dse.c:1079:0: note: a field with different name is defined in another translation unit
>  free_read_records (bb_info_t bb_info)
>  ^
> ../../gcc/tree-ssa-structalias.c:1526:0: warning: type âstruct topo_infoâ violates one definition rule [-Wodr]
>  struct topo_info
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a different type is defined in another translation unit
>  {
>  ^
> ../../gcc/tree-ssa-structalias.c:1529:0: note: the first difference of corresponding definitions is field âvisitedâ
>    sbitmap visited;
>  ^
> ../../gcc/ipa-cp.c:577:0: note: a field with different name is defined in another translation unit
>  {
>  ^
> ../../gcc/ggc-common.c:945:0: warning: type âstruct ptr_hash_entryâ violates one definition rule [-Wodr]
>  struct ptr_hash_entry
>  ^
> ../../gcc/vec.c:83:0: note: a different type is defined in another translation unit
>    void *ptr;
>  ^
> ../../gcc/ggc-common.c:948:0: note: the first difference of corresponding definitions is field âlocâ
>    struct loc_descriptor *loc;
>  ^
> ../../gcc/vec.c:83:0: note: a field of same name but different type is defined in another translation unit
>    void *ptr;
>  ^
> /usr/bin/ld.gold.real: warning: using 'GLIBCXX_3.4' as version for '_ZNKSt15basic_stringbufIwSt11char_traitsIwESaIwEE3strEv' which is also named in version 'GLIBCXX_3.4.6' in script
> /usr/bin/ld.gold.real: warning: using 'GLIBCXX_3.4' as version for '_ZNKSs11_M_disjunctEPKc' which is also named in version 'GLIBCXX_3.4.5' in script
> /usr/bin/ld.gold.real: warning: using 'GLIBCXX_3.4' as version for '_ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw' which is also named in version 'GLIBCXX_3.4.5' in script
> make[2]: *** [compare] Error 1
> make[1]: *** [stage3-bubble] Error 2
> make: *** [all] Error 2


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