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Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 2d3df1ce2..e602db19f 100644 --- a/configure.in +++ b/configure.in @@ -363,6 +363,30 @@ AC_RUN_IFELSE( ) +# +# Check if CC supports __thread attribute (Thread Local Storage) +# (Usually our OSX friends 're lacking support of it in older llvm versions ..) +# +AC_MSG_CHECKING([whether $CC supports __thread specifier (TLS)]) +AC_RUN_IFELSE( + [ + __thread int g_Test = -1; + + int main(int argc, char **argv){ + g_Test = 0; + return g_Test; + } + ], + [ + AC_MSG_RESULT([yes]) + CFLAGS="$CFLAGS -DHAS_TLS" + ], + [ + AC_MSG_RESULT([no]) + ] +) + + AC_MSG_CHECKING([whether $CC supports -Wno-unused-parameter]) OLD_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Wno-unused-parameter" |