> > I would simply use the PCRE version number to detect jit_exec at compile > > time: > > > > #if (PCRE_MAJOR > 8 || (PCRE_MAJOR == 8 && PCRE_MINOR >= 32)) > > #define PCRE_JIT_EXEC_AVAILABLE > > #endif > That'll only work if pcre isn't compiled with --disable-jit, if it is > even on the latest svn trunk linking against it results in: > libgit.a(grep.o): In function `pcre1match': > /home/avar/g/git/grep.c:411: undefined reference to `pcre_jit_exec' > If you look at pcre_jit_compile.c the whole structure of the file is: > #if defined SUPPORT_JIT > [...] > #define SLJIT_CONFIG_AUTO 1 /* ...and other macros */ > int > PRIV(jit_exec)(const PUBL(extra) *extra_data, const pcre_uchar *subject, > [...] > #else /* SUPPORT_JIT */ > [... no definition of pcre_jit_exec ...] > #endif > I.e. the pcre_jit_exec symbol won't be in the library, and thus > linking to it fails, so I need a macro accessible from pcre.h that > tells me whether it's going to be there, calling pcre_config() will be > too late.
Oh... we have dummy functions for jit stack management, but jit_exec is missing from. This is a bug and bad news. Perhaps defining a weak symbol could help, but might be not portable enough. Falling back to pcre_exec is also an option. Are the SLJIT macros visible outside? That is also something which shouldn't be :( Regards, Zoltan -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
