Pei He <hepeim...@gmail.com> wrote:
> The extension functions was developed by C++ mixed with C.
> ERROR: incompatible library
> "/home/hepei/bin/Chameleon/lib/libspgist_trie.so": missing magic block
> HINT: Extension libraries are required to use the PG_MODULE_MAGIC macro.
You can use extern "C" blocks for PG_MODULE_MAGIC, PG_FUNCTION_INFO_V1,
and function declarations:
extern "C"
{
#include "postgres.h"
#include "fmgr.h"
PG_MODULE_MAGIC;
PG_FUNCTION_INFO_V1(your_function);
extern Datum your_function(PG_FUNCTION_ARGS);
}
However, you should very carefully use C++ exceptions and destructors
in your module because PostgreSQL uses siglongjmp; C++ unwind semantics
don't work on postgres' errors. You cannot use those C++ features and
postgres' APIs together.
Regards,
---
Takahiro Itagaki
NTT Open Source Software Center
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