51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
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dnl **************************************************
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dnl Copyright (C) 2004 Matteo Settenvini
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dnl **************************************************
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dnl ---------- AX_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 adds the flag
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dnl to the CXXFLAGS variable.
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dnl Example of usage : AC_CHECK_CXXFLAG([Wall])
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dnl -------------------------------------------------
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AC_DEFUN([AC_CHECK_CXXFLAG],
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[ AC_REQUIRE([AC_PROG_CXX])dnl
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AC_MSG_CHECKING([whether $CXX supports the -$1 flag])
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ac_check_cxxflags=$CXXFLAGS
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CXXFLAGS="-$1"
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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="-$1 $ac_check_cxxflags" ],
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[AC_MSG_RESULT([no])
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CXXFLAGS=$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 to the CFLAGS variable.
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dnl Example of usage : AC_CHECK_CFLAG([Wall])
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dnl -------------------------------------------------
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AC_DEFUN([AC_CHECK_CFLAG],
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[ AC_REQUIRE([AC_PROG_CC])dnl
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AC_MSG_CHECKING([whether $CC supports the -$1 flag])
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ac_check_cflags=$CFLAGS
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CFLAGS="-$1"
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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="-$1 $ac_check_cflags" ],
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[AC_MSG_RESULT([no])
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CFLAGS=$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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