ODR Violations when building with LTO

[kostadinsh]

Some ODR violations appear as warnings when building with LTO
GCC Version is gcc (Gentoo Hardened 13.2.0 p3) 13.2.0
Steps to reproduce:

1. git clone https://github.com/mstorsjo/fdk-aac.git
2. export CXXFLAGS="-O2 -flto=auto"
3. mkdir fdk-aac/build && cd fdk-aac/build
4. cmake .. && make VERBOSE=1

libMpegTPDec/src/tpdec_adts.h:141:8: warning: type 'struct STRUCT_ADTS' violates the C++ One Definition Rule [-Wodr]
  141 | struct STRUCT_ADTS {
      |        ^
libMpegTPEnc/src/tpenc_adts.h:133:3: note: a different type is defined in another translation unit
  133 | } STRUCT_ADTS;
      |   ^
libMpegTPDec/src/tpdec_adts.h:142:18: note: the first difference of corresponding definitions is field 'bs'
  142 |   STRUCT_ADTS_BS bs;
      |                  ^
libMpegTPEnc/src/tpenc_adts.h:111:7: note: a field with different name is defined in another translation unit
  111 |   INT sample_freq;
      |       ^
libMpegTPDec/src/tpdec_latm.h:126:3: warning: type 'struct LATM_LAYER_INFO' violates the C++ One Definition Rule [-Wodr]
  126 | } LATM_LAYER_INFO;
      |   ^
libMpegTPEnc/src/tpenc_latm.h:130:3: note: a different type is defined in another translation unit
  130 | } LATM_LAYER_INFO;
      |   ^
libMpegTPDec/src/tpdec_latm.h:122:8: note: the first difference of corresponding definitions is field 'm_frameLengthType'
  122 |   UINT m_frameLengthType;
      |        ^
libMpegTPEnc/src/tpenc_latm.h:126:14: note: a field with different name is defined in another translation unit
  126 |   signed int frameLengthType;
      |              ^
libSACdec/src/sac_dec.h:201:3: warning: type 'struct LOSSLESSDATA' violates the C++ One Definition Rule [-Wodr]
  201 | } LOSSLESSDATA;
      |   ^
libSACenc/src/sacenc_bitstream.h:241:3: note: a different type is defined in another translation unit
  241 | } LOSSLESSDATA;
      |   ^
libSACdec/src/sac_dec.h:196:9: note: the first difference of corresponding definitions is field 'bsXXXDataMode'
  196 |   SCHAR bsXXXDataMode[MAX_PARAMETER_SETS];
      |         ^
libSACenc/src/sacenc_bitstream.h:236:9: note: a field of same name but different type is defined in another translation unit
  236 |   UCHAR bsXXXDataMode[SACENC_MAX_NUM_BOXES][MAX_NUM_PARAMS];
      |         ^
libSACdec/src/sac_dec.h:201:3: note: array types have different bounds
  201 | } LOSSLESSDATA;
      |   ^
./libSBRenc/include/../src/bit_sbr.h:131:8: warning: type 'struct SBR_HEADER_DATA' violates the C++ One Definition Rule [-Wodr]
  131 | struct SBR_HEADER_DATA {
      |        ^
libSBRdec/src/env_extr.h:295:3: note: a different type is defined in another translation unit
  295 | } SBR_HEADER_DATA;
      |   ^
./libSBRenc/include/../src/bit_sbr.h:132:11: note: the first difference of corresponding definitions is field 'sbr_amp_res'
  132 |   AMP_RES sbr_amp_res;
      |           ^
libSBRdec/src/env_extr.h:271:3: note: a field with different name is defined in another translation unit
  271 |   syncState; /*!< The current initialization status of the header */
      |   ^
./libSBRenc/include/../src/ton_corr.h:131:3: warning: type 'struct PATCH_PARAM' violates the C++ One Definition Rule [-Wodr]
  131 | } PATCH_PARAM;
      |   ^
libSBRdec/src/lpp_tran.h:187:3: note: a different type is defined in another translation unit
  187 | } PATCH_PARAM;
      |   ^
./libSBRenc/include/../src/ton_corr.h:120:7: note: the first difference of corresponding definitions is field 'sourceStartBand'
  120 |   INT sourceStartBand; /*!< first band in lowbands where to take the samples
      |       ^
libSBRdec/src/lpp_tran.h:174:9: note: a field of same name but different type is defined in another translation unit
  174 |   UCHAR sourceStartBand; /*!< first band in lowbands where to take the samples
      |         ^
./libSBRenc/include/../src/ton_corr.h:131:3: note: type 'INT' should match type 'UCHAR'
  131 | } PATCH_PARAM;
      |   ^
./libSBRenc/include/../src/sbr.h:129:16: warning: type 'struct SBR_CHANNEL' violates the C++ One Definition Rule [-Wodr]
  129 | typedef struct SBR_CHANNEL {
      |                ^
libSBRdec/src/sbr_dec.h:173:3: note: a different type is defined in another translation unit
  173 | } SBR_CHANNEL;
      |   ^
./libSBRenc/include/../src/sbr.h:130:22: note: the first difference of corresponding definitions is field 'hEnvChannel'
  130 |   struct ENV_CHANNEL hEnvChannel;
      |                      ^
libSBRdec/src/sbr_dec.h:170:18: note: a field with different name is defined in another translation unit
  170 |   SBR_FRAME_DATA frameData[(1) + 1];
      |                  ^
./libFDK/include/nlc_dec.h:129:3: warning: type 'DATA_TYPE' violates the C++ One Definition Rule [-Wodr]
  129 | } DATA_TYPE;
      |   ^
libSACenc/src/sacenc_nlc_enc.h:120:3: note: an enum with different number of values is defined in another translation unit
  120 | } DATA_TYPE;
      |   ^