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2de413db32
More macro updates from the pa_autoconf library. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
22 lines
883 B
Plaintext
22 lines
883 B
Plaintext
dnl --------------------------------------------------------------------------
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dnl PA_OPTION_LTO(default)
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dnl
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dnl Try to enable link-time optimization. Enable it by default if
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dnl the "default" argument is set to "yes"; currently the default is "no",
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dnl but that could change in the future -- to force disabled by default,
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dnl set to "no".
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dnl --------------------------------------------------------------------------
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AC_DEFUN([PA_OPTION_LTO],
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[AC_BEFORE([$0],[AC_PROG_AR])dnl
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AC_BEFORE([$0],[AC_PROG_RANLIB])dnl
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PA_ARG_BOOL([lto],
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[Try to enable link-time optimization for this compiler],
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[m4_default([$1],[no])],
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[PA_FIND_FLAGS([-flto=auto],[-flto])
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PA_FIND_FLAGS([-ffat-lto-objects])
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PA_FIND_FLAGS([-fuse-linker-plugin])
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AS_IF([test x$ac_compiler_gnu = xyes],
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[AC_CHECK_TOOL(AR, [gcc-ar], [ar], [:])
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AC_CHECK_TOOL(RANLIB, [gcc-ranlib], [ranlib], [:])])])])
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