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Add explicit check for libatomic

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This commit is contained in:
Ondřej Surý
2019-03-01 10:10:17 +01:00
committed by Evan Hunt
parent db7a7357a6
commit fcade0610f
2 changed files with 74 additions and 8 deletions
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28
configure.ac
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@@ -1939,11 +1939,20 @@ AC_CHECK_HEADERS(
[[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
)],
[AC_MSG_RESULT([no])],
[AC_MSG_RESULT([yes])
ISC_ATOMIC_LIBS="-latomic"
[ISC_ATOMIC_LIBS="-latomic"
save_LIBS="$LIBS"
LIBS="$LIBS $ISC_ATOMIC_LIBS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdatomic.h>]],
[[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
)],
[AC_MSG_RESULT([yes])],
[AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
LIBS="$save_LIBS"
])
],
[AC_MSG_FAILURE([stdatomic.h header found, but compilation failed, fix your toolchaing.])]
[AC_MSG_FAILURE([stdatomic.h header found, but compilation failed, please fix your toolchain.])]
)],
[AC_MSG_CHECKING([for memory model aware atomic operations])
AC_COMPILE_IFELSE(
@@ -1960,8 +1969,17 @@ AC_CHECK_HEADERS(
[[int64_t val = 0; __atomic_fetch_add(&val, 1, __ATOMIC_RELAXED);]]
)],
[AC_MSG_RESULT([no])],
[AC_MSG_RESULT([yes])
ISC_ATOMIC_LIBS="-latomic"
[ISC_ATOMIC_LIBS="-latomic"
save_LIBS="$LIBS"
LIBS="$LIBS $ISC_ATOMIC_LIBS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <inttypes.h>]],
[[int64_t val = 0; __atomic_fetch_add(&val, 1, __ATOMIC_RELAXED);]]
)],
[AC_MSG_RESULT([yes])],
[AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
LIBS="$save_LIBS"
])
],
[AC_MSG_RESULT([__sync builtins])