rs6000_mangle_decl_assembler_name rewrites the long double math
built-ins (sqrtl -> __sqrtieee128, and the fused sincos) to the names
glibc exports for IEEE-128 long double, gated only on TARGET_IEEEQUAD.
On a non-glibc target such as FreeBSD those __*ieee128 names do not
exist, so code using long double math (e.g. libgfortran's cargl calling
atan2l) ends up with unsatisfiable references.
Gate the remapping on glibc_supports_ieee_128bit (), which exists for
exactly this purpose: only rewrite to glibc's names when glibc provides
them. Non-glibc targets keep the plain *l names, which their libm
provides as IEEE-128. The complex multiply/divide remapping above is
unchanged (those map to libgcc's __mulkc3/__divkc3, present everywhere).
gcc/ChangeLog:
* config/rs6000/rs6000.cc (rs6000_mangle_decl_assembler_name):
Only remap long double built-ins to __*ieee128 when
glibc_supports_ieee_128bit ().
Signed-off-by: Piotr Kubaj <[email protected]>
---
gcc/config/rs6000/rs6000.cc | 1 +
1 file changed, 1 insertion(+)
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -28563,6 +28563,7 @@
/* Map long double built-in functions if long double is IEEE 128-bit. */
if (TARGET_FLOAT128_TYPE && TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128
+ && glibc_supports_ieee_128bit ()
&& TREE_CODE (decl) == FUNCTION_DECL
&& DECL_IS_UNDECLARED_BUILTIN (decl)
&& DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
--
2.49.0
