PCRE_OBJ=""

AC_SUBST(PCRE_OBJ)

AC_SUBST(PCRE_LIBS)

AC_SUBST(PCRE_CFLAGS)

PKG_CHECK_MODULES(PCRE, libpcre)

PKG_CHECK_EXISTS(libpcre >= 7,

[AC_MSG_NOTICE([PCRE version is 7 or higher])],

[AC_MSG_NOTICE([PCRE version is below 7])

AC_DEFINE([HAVE_LIBPCRE_LESSER_THAN_7],

1,

[Define if libpcre version is less than 7])])

AC_CHECK_HEADERS(pcre.h)

AC_CHECK_LIB(pcre, pcre_compile, [ PCRE_LIBS="-lpcre" ], [AC_MSG_ERROR([PCRE is required])])