| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. |
| 2 | # Local configure fragment for sysdeps/s390. |
| 3 | |
| 4 | dnl It is always possible to access static and hidden symbols in an |
| 5 | dnl position independent way. |
| 6 | AC_DEFINE(PI_STATIC_AND_HIDDEN) |
| 7 | |
| 8 | dnl Accept as 2.24 or newer. |
| 9 | AC_CHECK_PROG_VER(AS, $AS, --version, |
| 10 | [GNU assembler.* \([0-9]*\.[0-9.]*\)], |
| 11 | [2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390.") |
| 12 | |
| 13 | |
| 14 | AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl |
| 15 | cat > conftest.c <<\EOF |
| 16 | #include <htmintrin.h> |
| 17 | void testtransaction () |
| 18 | { |
| 19 | if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED) |
| 20 | { |
| 21 | __builtin_tend (); |
| 22 | } |
| 23 | } |
| 24 | EOF |
| 25 | dnl |
| 26 | dnl test, if the tbegin instruction is used by __builtin_tbegin |
| 27 | if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ; |
| 28 | then |
| 29 | libc_cv_gcc_builtin_tbegin=yes |
| 30 | else |
| 31 | libc_cv_gcc_builtin_tbegin=no |
| 32 | fi |
| 33 | rm -f conftest* ]) |
| 34 | |
| 35 | if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then |
| 36 | critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390." |
| 37 | fi |
| 38 | |
| 39 | test -n "$critic_missing" && AC_MSG_ERROR([ |
| 40 | *** $critic_missing]) |