+AX_C___ATTRIBUTE__
+AS_IF([test "x$ax_cv___attribute__" = "xyes"],
+ [:],
+ [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
+
+AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
+LIBS="$PTHREAD_LIBS $LIBS"
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+CC="$PTHREAD_CC"
+
+# Check linker option
+AX_APPEND_LINK_FLAGS([-Wl,--no-as-needed], [LD_NO_AS_NEEDED])
+AC_SUBST([LD_NO_AS_NEEDED])
+
+AC_HEADER_STDBOOL
+AC_CHECK_HEADERS([ \
+ fcntl.h \
+ float.h \
+ libintl.h \
+ limits.h \
+ malloc.h \
+ netdb.h \
+ netinet/in.h \
+ stddef.h \
+ sys/socket.h \
+])
+
+if test ! -f "$srcdir/formats/ctf/metadata/ctf-parser.h"; then
+ if test x"$(basename "$YACC")" != "xbison -y"; then
+ AC_MSG_ERROR([[bison not found and is required when building from git.
+ Please install bison]])
+ fi
+ AC_PATH_PROG([BISON],[bison])
+ AX_PROG_BISON_VERSION([2.4], [],[
+ AC_MSG_ERROR([[Bison >= 2.4 is required when building from git]])
+ ])
+fi
+
+if test ! -f "$srcdir/formats/ctf/metadata/ctf-lexer.c"; then
+ if test x"$LEX" != "xflex"; then
+ AC_MSG_ERROR([[flex not found and is required when building from git.
+ Please install flex]])
+ fi
+ AC_PATH_PROG([FLEX],[flex])
+ AX_PROG_FLEX_VERSION([2.5.35], [],[
+ AC_MSG_ERROR([[Flex >= 2.5.35 is required when building from git]])
+ ])
+fi