32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
dnl **************************************************
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dnl Copyright (C) 2004 Matteo Settenvini
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dnl **************************************************
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dnl ---------- AX_CHECK_LDFLAG ---------------------
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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 end of the first parameter.
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dnl Example of usage : AC_CHECK_LDFLAG([LDFLAGS],[--as-needed])
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dnl -------------------------------------------------
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AC_DEFUN([AC_CHECK_LDFLAG],
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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 the linker supports the $2 flag])
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ac_check_ldflags=$LDFLAGS
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LDFLAGS="-Wl,$2"
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AC_LANG_PUSH([C])
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AC_LINK_IFELSE(
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AC_LANG_PROGRAM([], [return 0;]),
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[AC_MSG_RESULT([yes])
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LDFLAGS=$ac_check_ldflags
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$1="-Wl,$2 $[$1]" ],
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[AC_MSG_RESULT([no])
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LDFLAGS=$ac_check_ldflags ]
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)
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AC_LANG_POP
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])dnl ------- AC_CHECK_LDFLAG ----------------------
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