Shulou(Shulou.com)06/03 Report--

1. Description of cross-platform issues in Category +

After compiling the C++ project under the x86 platform, there was a problem that the symbol table _ _ atomic_fetch_sub_4 could not be found when running the compiled C++ shared library, as shown in figure 1.1.

Figure 1.1 symbol table missing

two。 Problem solving

The reason for the missing symbol table is that the corresponding platform compilation option is added when compiling across platforms, and the-march=i686 option is added on x86 platforms, as shown in figure 2.1.

Figure 2.1 adds the Makefile compilation option to compile and upload, and then run the dynamic library, and it is found that there is no problem with the undefined symbol table in the dynamic library, as shown in figure 2.2.

Figure 2.2 screenshot of the normal operation of the dynamic library

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