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-rw-r--r--configure.ac27
1 files changed, 27 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 672a6dff..1dd5930e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -242,6 +242,33 @@ else
AM_CONDITIONAL(HAVE_SSE4_1, false)
fi
+dnl Check if the compiler supports specified GCC's built-in function
+AC_DEFUN([CHECK_BUILTIN_SUPPORT], [
+ AC_CACHE_CHECK(
+ [whether ${CC} has $1 built-in],
+ [osmo_cv_cc_has_builtin], [
+ AC_LINK_IFELSE([
+ AC_LANG_PROGRAM([], [
+ __builtin_cpu_supports("sse");
+ ])
+ ],
+ [AS_VAR_SET([osmo_cv_cc_has_builtin], [yes])],
+ [AS_VAR_SET([osmo_cv_cc_has_builtin], [no])])
+ ]
+ )
+
+ AS_IF([test yes = AS_VAR_GET([osmo_cv_cc_has_builtin])], [
+ AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$1), 1,
+ [Define to 1 if compiler has the '$1' built-in function])
+ ], [
+ AC_MSG_WARN($2)
+ ])
+])
+
+dnl Check if the compiler supports runtime SIMD detection
+CHECK_BUILTIN_SUPPORT([__builtin_cpu_supports],
+ [Runtime SIMD detection will be disabled])
+
AC_OUTPUT(
libosmocore.pc
libosmocodec.pc