Merge pull request #241 from tetengo/ubuntu_upgrade

Update configure.ac #236

Author: kaorut

.github/workflows/linux-clang.yml

@@ -17,7 +17,7 @@ env:
   CLANG_COMMAND:           clang-14
   CLANGXX_COMMAND:         clang++-14
   DOXYGEN_VER:             1.9.4
-  DOXYGEN_CACHE_REV:       0
+  DOXYGEN_CACHE_REV:       1
   BOOST_VER:               1_79_0
   BOOST_VER_DOT:           1.79.0
   BOOST_BOOTSTRAP_TOOLSET: clang

configure.ac

@@ -193,9 +193,6 @@ AC_SUBST([LDFLAGS], "${LDFLAGS} ${BOOST_LDFLAGS}")
 AC_SUBST([LIBS], "-lstdc++fs -lstdc++ ${LIBS}")
 
 #### Header Checks ####
-AX_CXX_HAVE_STD
-AX_CXX_HAVE_STL
-
 AC_SUBST([CPPFLAGS], "${CPPFLAGS} ${BOOST_CPPFLAGS}")
 
 #### Compilation Options ####