61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
dnl **************************************************
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dnl Copyright (C) 2004 Matteo Settenvini
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dnl **************************************************
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dnl ---------- AC_CHECK_CXXFLAG ---------------------
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dnl This macro checks if a particular flag for the
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dnl C++ compiler works. If it is so, it puts the flag
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dnl into the first macro parameter.
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dnl Example of usage : AC_CHECK_CXXFLAG([CXXFLAGS],[Wall])
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dnl -------------------------------------------------
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AC_DEFUN([AC_CHECK_CXXFLAG],
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[ if test -z "$1" -o -z "$2"; then
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AC_MSG_FAILURE([Wrong parameters passed to the m4 macro.
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Please contact the package mantainer.])
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fi
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AC_REQUIRE([AC_PROG_CXX])dnl
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AC_MSG_CHECKING([whether $CXX supports the -$2 flag])
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ac_check_cxxflags=$CXXFLAGS
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CXXFLAGS="-$2"
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AC_LANG_PUSH([C++])
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AC_COMPILE_IFELSE(
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AC_LANG_PROGRAM([], [return 0;]),
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[AC_MSG_RESULT([yes])
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CXXFLAGS="$ac_check_cxxflags"
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$1="-$2 $[$1]" ],
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[AC_MSG_RESULT([no])
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CXXFLAGS=$ac_check_cxxflags ]
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)
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AC_LANG_POP
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])dnl ------- AC_CHECK_CXXFLAG ----------------------
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dnl ---------- AC_CHECK_CFLAG ---------------------
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dnl This macro checks if a particular flag for the
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dnl C compiler works. If it is so, it adds the flag
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dnl into the first macro parameter.
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dnl Example of usage : AC_CHECK_CFLAG([CFLAGS],[Wall])
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dnl -------------------------------------------------
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AC_DEFUN([AC_CHECK_CFLAG],
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[ if test -z "$1" -o -z "$2"; then
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AC_MSG_FAILURE([Wrong parameters passed to the m4 macro.
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Please contact the package mantainer.])
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fi
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AC_REQUIRE([AC_PROG_CC])dnl
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AC_MSG_CHECKING([whether $CC supports the -$2 flag])
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ac_check_cflags=$CFLAGS
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CFLAGS="-$2"
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AC_LANG_PUSH([C])
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AC_COMPILE_IFELSE(
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AC_LANG_PROGRAM([], [return 0;]),
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[AC_MSG_RESULT([yes])
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CFLAGS="$ac_check_cflags"
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$1="-$2 $[$1]" ],
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[AC_MSG_RESULT([no])
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CFLAGS=$ac_check_cflags ]
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)
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AC_LANG_POP
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])dnl ------- AC_CHECK_CFLAG ----------------------
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