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Check and link libatomic if needed #1612

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Dec 14, 2023
Merged

Check and link libatomic if needed #1612

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14 changes: 13 additions & 1 deletion configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,19 @@ CXX="$PTHREAD_CXX"
])

# Atomics
AC_CHECK_HEADERS([stdatomic.h])
AC_CHECK_HEADERS([stdatomic.h],
[AC_MSG_CHECKING([whether libatomic is required])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdatomic.h>]], [[atomic_uint_fast64_t i; i++;]])],
[AC_MSG_RESULT([no])],
[save_LIBS="$LIBS"
LIBS="$LIBS -latomic"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdatomic.h>]], [[atomic_uint_fast64_t i; i++;]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_ERROR([failed to find working configuration with atomics])]
)]
)],
[]
)

# Check for poll.h (it's in POSIX so everyone should have it?)
AC_CHECK_HEADERS([poll.h])
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