diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index f4ac3d2d9..35da65ada 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -3249,6 +3249,25 @@ if test $gmp_cv_c_attribute_noreturn = yes; then fi ]) +dnl GMP_C_HIDDEN_ALIAS +dnl ------------------------ + +AC_DEFUN([GMP_C_HIDDEN_ALIAS], +[AC_CACHE_CHECK([whether gcc hidden aliases work], + gmp_cv_c_hidden_alias, +[AC_TRY_COMPILE( +[void hid() __attribute__ ((visibility("hidden"))); +void hid() {} +void pub() __attribute__ ((alias("hid")));], +, gmp_cv_c_hidden_alias=yes, gmp_cv_c_hidden_alias=no) +]) +if test $gmp_cv_c_hidden_alias = yes; then + AC_DEFINE(HAVE_HIDDEN_ALIAS, 1, + [Define to 1 if the compiler accepts gcc style __attribute__ ((visibility)) +and __attribute__ ((alias))]) + GMP_DEFINE(HAVE_HIDDEN_ALIAS, []) +fi +]) dnl GMP_C_DOUBLE_FORMAT dnl ------------------- |