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-rw-r--r--libstdc++-v3/config.h.in5
1 files changed, 5 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index a336daf2303..8e037fb13fd 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -892,6 +892,11 @@
<stdio.h>, and <stdlib.h> can be used or exposed. */
#undef _GLIBCXX_USE_C99
+/* Define if C99 inverse trig functions in <complex.h> should be used in
+ <complex>. Using compiler builtins for these functions requires
+ corresponding C99 library functions to be present. */
+#undef _GLIBCXX_USE_C99_COMPLEX_ARC
+
/* Define if C99 functions in <complex.h> should be used in <tr1/complex>.
Using compiler builtins for these functions requires corresponding C99
library functions to be present. */