--- libfyaml-0.8/configure.ac.original	2023-07-12 16:02:52.654450371 +0300
+++ libfyaml-0.8/configure.ac	2023-07-12 16:03:08.318386957 +0300
@@ -72,7 +72,7 @@
 
 AC_PROG_MKDIR_P
 AC_PROG_CC
-AC_PROG_CC_C99
+AC_PROG_CC
 AM_PROG_CC_C_O
 
 AC_PROG_GCC_TRADITIONAL
@@ -100,7 +100,7 @@
 AC_LIBLTDL_INSTALLABLE
 AC_LIBTOOL_DLOPEN
 AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
+LT_INIT
 AC_SUBST(LTDLINCL)
 AC_SUBST(LIBLTDL)
 AC_CONFIG_SUBDIRS(libltdl)
@@ -113,7 +113,7 @@
 AC_CHECK_TYPES(ssize_t, , [AC_DEFINE([ssize_t], [signed long],
     [Define ssize_t if it is not done by the standard libs.])])
 AC_TYPE_OFF_T
-AC_TYPE_SIGNAL
+
 AC_TYPE_UID_T
 AC_CHECK_DECLS(environ)