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89563d78b2
Allow code to be executed in the success or failure scenatios of PA_ADD_*FLAGS. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
23 lines
888 B
Plaintext
23 lines
888 B
Plaintext
dnl --------------------------------------------------------------------------
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dnl PA_ADD_FLAGS(variable, flag [,actual_flag [,success [,failure]]])
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dnl
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dnl Attempt to add the given option to CPPFLAGS, if it doesn't break
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dnl compilation. If the option to be tested is different than the
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dnl option that should actually be added, add the option to be
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dnl actually added as a second argument.
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dnl --------------------------------------------------------------------------
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AC_DEFUN([PA_ADD_FLAGS],
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[AC_MSG_CHECKING([if $CC accepts $2])
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pa_add_flags__old_flags="$$1"
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$1="$$1 $2"
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AC_TRY_LINK(AC_INCLUDES_DEFAULT,
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[printf("Hello, World!\n");],
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[AC_MSG_RESULT([yes])
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$1="$pa_add_flags__old_flags ifelse([$3],[],[$2],[$3])"
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AC_DEFINE(PA_SYM([$1_],[$2]), 1,
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[Define to 1 if compiled with the `$2' compiler flag])
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$4],
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[AC_MSG_RESULT([no])
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$1="$pa_add_flags__old_flags"
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$5])])
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