autotools: fix --enable-jit=auto (#454)

Reflect the new location of sljit and update release files

NON-AUTOTOOLS-BUILD

@@ -138,7 +138,7 @@ example.
      Note that you must compile pcre2_jit_compile.c, even if you have not
      defined SUPPORT_JIT in src/config.h, because when JIT support is not
      configured, dummy functions are compiled. When JIT support IS configured,
-     pcre2_jit_compile.c #includes other files from the sljit subdirectory,
+     pcre2_jit_compile.c #includes other files from the sljit dependency,
      all of whose names begin with "sljit". It also #includes
      src/pcre2_jit_match.c and src/pcre2_jit_misc.c, so you should not compile
      those yourself.

README

@@ -865,7 +865,7 @@ The distribution should contain the files listed below.
   src/pcre2_jit_simd_inc.h header used by JIT
   src/pcre2_ucp.h          header for Unicode property handling
 
-  sljit/*                  source files for the JIT compiler
+  deps/sljit/sljit_src/*   source files for the JIT compiler
 
 (B) Source files for programs that use PCRE2:
 

configure.ac

@@ -219,7 +219,7 @@ if test "$enable_jit" = "auto"; then
   CPPFLAGS=-I$srcdir
   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
   #define SLJIT_CONFIG_AUTO 1
-  #include "src/sljit/sljitConfigCPU.h"
+  #include "deps/sljit/sljit_src/sljitConfigCPU.h"
   #if (defined SLJIT_CONFIG_UNSUPPORTED && SLJIT_CONFIG_UNSUPPORTED)
   #error unsupported
   #endif]])], enable_jit=yes, enable_jit=no)

src/config.h.generic

@@ -154,7 +154,8 @@ sure both macros are undefined; an emulation function will then be used. */
 /* Define to 1 if you have the <unistd.h> header file. */
 /* #undef HAVE_UNISTD_H */
 
-/* Define to 1 if the compiler supports simple visibility declarations. */
+/* Define to 1 if the compiler supports GCC compatible visibility
+   declarations. */
 /* #undef HAVE_VISIBILITY */
 
 /* Define to 1 if you have the <wchar.h> header file. */

src/pcre2.h.generic

@@ -410,6 +410,7 @@ released, the numbers must not be changed. */
 #define PCRE2_ERROR_INTERNAL_DUPMATCH (-65)
 #define PCRE2_ERROR_DFA_UINVALID_UTF  (-66)
 #define PCRE2_ERROR_INVALIDOFFSET     (-67)
+#define PCRE2_ERROR_JIT_UNSUPPORTED   (-68)
 
 
 /* Request types for pcre2_pattern_info() */