- Lay out autotools foundations

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@134 3ecf2c5c-341e-0410-92b4-d18e462d057c

m4/Makefile.am

@@ -0,0 +1,23 @@
+# m4/Makefile.am - Copyright 2005, University
+#                  of Padova, dept. of Pure and Applied
+#                  Mathematics
+#
+# This file is part of SGPEMv2.
+#
+# This is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# SGPEMv2 is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with SGPEMv2; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+aclocaldir = $(datadir)/aclocal
+aclocal_DATA = compilerflags.m4

m4/compilerflags.m4

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+dnl  **************************************************
+dnl    Copyright (C) 2004   Matteo Settenvini
+dnl  **************************************************
+
+dnl ---------- AX_CHECK_CXXFLAG ---------------------
+dnl This macro checks if a particular flag for the 
+dnl C++ compiler works. If it is so, it adds the flag 
+dnl to the CXXFLAGS variable. 
+dnl Example of usage : AC_CHECK_CXXFLAG([Wall])
+dnl -------------------------------------------------
+AC_DEFUN([AC_CHECK_CXXFLAG],
+[ AC_REQUIRE([AC_PROG_CXX])dnl
+  AC_MSG_CHECKING([whether $CXX supports the -$1 flag])
+  ac_check_cxxflags=$CXXFLAGS
+  CXXFLAGS="-$1"
+  AC_LANG_PUSH([C++])
+  AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM([], [return 0;]),
+    [AC_MSG_RESULT([yes])
+      CXXFLAGS="-$1 $ac_check_cxxflags" ],
+    [AC_MSG_RESULT([no])
+      CXXFLAGS=$ac_check_cxxflags ]
+  )
+  AC_LANG_POP
+])dnl ------- AC_CHECK_CXXFLAG ----------------------
+
+
+
+dnl ---------- AC_CHECK_CFLAG ---------------------
+dnl This macro checks if a particular flag for the 
+dnl C compiler works. If it is so, it adds the flag 
+dnl to the CFLAGS variable. 
+dnl Example of usage : AC_CHECK_CFLAG([Wall])
+dnl -------------------------------------------------
+AC_DEFUN([AC_CHECK_CFLAG],
+[ AC_REQUIRE([AC_PROG_CC])dnl
+  AC_MSG_CHECKING([whether $CC supports the -$1 flag])
+  ac_check_cflags=$CFLAGS
+  CFLAGS="-$1"
+  AC_LANG_PUSH([C])
+  AC_COMPILE_IFELSE(
+    AC_LANG_PROGRAM([], [return 0;]),
+    [AC_MSG_RESULT([yes])
+      CFLAGS="-$1 $ac_check_cflags" ],
+    [AC_MSG_RESULT([no])
+      CFLAGS=$ac_check_cflags ]
+  )
+  AC_LANG_POP
+])dnl ------- AC_CHECK_CFLAG ----------------------
+