45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
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dnl A version of AS_COMPILER_FLAG that supports linker flags
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dnl Based on:
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dnl as-compiler-flag.m4 0.1.0
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dnl autostars m4 macro for detection of compiler flags
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dnl David Schleef <ds@schleef.org>
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dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $
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dnl TP_LINKER_FLAG(LDFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
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dnl Tries to compile with the given LDFLAGS.
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dnl
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dnl Runs ACTION-IF-ACCEPTED if the compiler/linker for the currently selected
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dnl AC_LANG can compile with the flags, and ACTION-IF-NOT-ACCEPTED otherwise.
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dnl
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dnl Note that LDFLAGS are passed to the linker via the compiler, so you
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dnl should check for -Wl,--no-add-needed rather than --no-add-needed.
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AC_DEFUN([TP_LINKER_FLAG],
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[
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AC_MSG_CHECKING([to see if compiler/linker understand $1])
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS $1"
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AC_COMPILE_IFELSE(AC_LANG_SOURCE([]), [flag_ok=yes], [flag_ok=no])
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LDFLAGS="$save_LDFLAGS"
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if test "X$flag_ok" = Xyes ; then
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$2
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true
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else
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$3
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true
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fi
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AC_MSG_RESULT([$flag_ok])
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])
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dnl TP_ADD_LINKER_FLAG(VARIABLE, LDFLAGS)
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dnl Append LDFLAGS to VARIABLE if the linker supports them.
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AC_DEFUN([TP_ADD_LINKER_FLAG],
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[
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TP_LINKER_FLAG([$2], [$1="[$]$1 $2"])
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])
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