简单的结构增加 C++ Android 二进制文件的大小

问：

为什么将以下结构添加到我的公共标头会导致我的 android 二进制大小 （libMyLibrary.so） 增加 4KB？

#define EXPORT __attribute__((visibility("default")))
struct EXPORT ITest
{
    inline static const std::string TestString   = "TestString";
};

使用 nm 不是很有帮助，因为它只给了我两个条目，对应于只增加了大约 32 字节的条目。 在使用 readelf 进一步调查时，很明显 .text 部分标题增加了 4KB。仅凭这些小代码行就已经很多了。 原因是什么，或者我将如何进一步调查？

下面是我使用的编译器和链接器标志：

target_compile_options(${PROJECT_NAME} PRIVATE
        $<$<CONFIG:RELEASE>: -g0
                -Oz
                -fvisibility=hidden
                -fvisibility-inlines-hidden
                -fno-rtti
                -fno-unwind-tables
                -fno-exceptions
                -fno-omit-frame-pointer>
                -Wno-null-conversion
)

target_link_options(${PROJECT_NAME} PRIVATE
        $<$<CONFIG:RELEASE>: -g0
                -Wl,--exclude-libs,ALL
                -Wl,--gc-sections
                -WX-,--icf=safe
                -Wl,--strip-all>
)

readelf 的输出

There are 24 section headers, starting at offset 0xd5208:

Section Headers:
  [Nr] Name              Type            Address          Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            0000000000000000 000000 000000 00      0   0  0
  [ 1] .note.gnu.build-id NOTE            0000000000000200 000200 000024 00   A  0   0  4
  [ 2] .gnu.hash         GNU_HASH        0000000000000228 000228 000c58 00   A  3   0  8
  [ 3] .dynsym           DYNSYM          0000000000000e80 000e80 003048 18   A  4   3  8
  [ 4] .dynstr           STRTAB          0000000000003ec8 003ec8 008131 00   A  0   0  1
  [ 5] .gnu.version      VERSYM          000000000000bffa 00bffa 000406 02   A  3   0  2
  [ 6] .gnu.version_r    VERNEED         000000000000c400 00c400 000020 00   A  4   1  8
  [ 7] .rela.dyn         RELA            000000000000c420 00c420 00ead8 18   A  3   0  8
  [ 8] .rela.plt         RELA            000000000001aef8 01aef8 000df8 18  AI  3  19  8
  [ 9] .plt              PROGBITS        000000000001bcf0 01bcf0 000970 10  AX  0   0 16
  [10] .text             PROGBITS        000000000001c660 01c660 0acb14 00  AX  0   0  4
  [11] .rodata           PROGBITS        00000000000c9180 0c9180 004852 00   A  0   0 16
  [12] .eh_frame_hdr     PROGBITS        00000000000cd9d4 0cd9d4 000064 00   A  0   0  4
  [13] .eh_frame         PROGBITS        00000000000cda38 0cda38 0001c8 00   A  0   0  8
  [14] .note.android.ident NOTE            00000000000cdc00 0cdc00 000098 00   A  0   0  4
  [15] .init_array       INIT_ARRAY      00000000000cf448 0ce448 000118 08  WA  0   0  8
  [16] .fini_array       FINI_ARRAY      00000000000cf560 0ce560 000010 08  WA  0   0  8
  [17] .data.rel.ro      PROGBITS        00000000000cf570 0ce570 006220 00  WA  0   0  8
  [18] .dynamic          DYNAMIC         00000000000d5790 0d4790 000200 10  WA  4   0  8
  [19] .got              PROGBITS        00000000000d5990 0d4990 000670 08  WA  0   0  8
  [20] .data             PROGBITS        00000000000d6000 0d5000 000040 00  WA  0   0  8
  [21] .bss              NOBITS          00000000000d6040 0d5040 0012c0 00  WA  0   0  8
  [22] .comment          PROGBITS        0000000000000000 0d5040 0000dc 01  MS  0   0  1
  [23] .shstrtab         STRTAB          0000000000000000 0d511c 0000e9 00      0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
  L (link order), O (extra OS processing required), G (group), T (TLS),
  C (compressed), x (unknown), o (OS specific), E (exclude),
  p (processor specific)

Symbol table '.dynsym' contains 515 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 000000000001c660     0 SECTION LOCAL  DEFAULT   10 
     2: 00000000000cf570     0 SECTION LOCAL  DEFAULT   17 
     3: 00000000000d6040     0 NOTYPE  LOCAL  DEFAULT  ABS __bss_start__
     4: 00000000000d7300     0 NOTYPE  LOCAL  DEFAULT  ABS __end__
     5: 00000000000d7300     0 NOTYPE  LOCAL  DEFAULT  ABS __bss_end__
     6: 00000000000d6040     0 NOTYPE  LOCAL  DEFAULT  ABS __bss_start
     7: 00000000000d7300     0 NOTYPE  LOCAL  DEFAULT  ABS _bss_end__
     8: 00000000000d7300     0 NOTYPE  LOCAL  DEFAULT  ABS _end
     9: 00000000000d6040     0 NOTYPE  LOCAL  DEFAULT  ABS _edata
   ......
   213: 0000000000042eb8   144 FUNC    GLOBAL DEFAULT   10 <Hidden>
   214: 00000000000d6248    24 OBJECT  WEAK   DEFAULT   21 _ZN9Namespace5ITest10TestStringE
   215: 0000000000038a68   232 FUNC    GLOBAL DEFAULT   10 <Hidden>
.....
   327: 0000000000070728    60 FUNC    WEAK   DEFAULT   10 <Hidden>
   328: 00000000000d6260     8 OBJECT  WEAK   DEFAULT   21 _ZGVN9Namespace5ITest10TestStringE
   329: 00000000000ba8b8   156 FUNC    GLOBAL DEFAULT   10 <Hidden>
.....
   514: 0000000000040408    84 FUNC    GLOBAL DEFAULT   10 <Hidden>