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configure: Check compile+link when checking existence of functions #175

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Merged
merged 1 commit into from
Mar 31, 2022
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configure: Check compile+link when checking existence of functions #175

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4 changes: 2 additions & 2 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -261,13 +261,13 @@ else
fi

AC_MSG_CHECKING([for __builtin_popcount])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[void myfunc() {__builtin_popcount(0);}]])],
AC_LINK_IFELSE([AC_LANG_SOURCE([[void myfunc() {__builtin_popcount(0);}]])],
[ AC_MSG_RESULT([yes]);AC_DEFINE(HAVE_BUILTIN_POPCOUNT,1,[Define this symbol if __builtin_popcount is available]) ],
[ AC_MSG_RESULT([no])
])

AC_MSG_CHECKING([for __builtin_clzll])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[void myfunc() { __builtin_clzll(1);}]])],
AC_LINK_IFELSE([AC_LANG_SOURCE([[void myfunc() { __builtin_clzll(1);}]])],
[ AC_MSG_RESULT([yes]);AC_DEFINE(HAVE_BUILTIN_CLZLL,1,[Define this symbol if __builtin_clzll is available]) ],
[ AC_MSG_RESULT([no])
])
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