diff options
| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-06-20 19:40:55 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-06-20 19:42:05 -0500 |
| commit | 85c2e6110c9a01ec817c30f1b7e20549d7229987 (patch) | |
| tree | 9b044403d906f9aaa6930484ae6d60dc687ecc19 /configure.in | |
| parent | b8c792af85fe3ff65c0cd68e2f291072a60cd953 (diff) | |
| download | glibc-85c2e6110c9a01ec817c30f1b7e20549d7229987.tar.gz glibc-85c2e6110c9a01ec817c30f1b7e20549d7229987.tar.xz glibc-85c2e6110c9a01ec817c30f1b7e20549d7229987.zip | |
Fix loop construction to functions calls
Check wheter the compiler has the option -fno-tree-loop-distribute-patterns to inhibit loop transformation to library calls and uses it on memset and memmove default implementation to avoid recursive calls.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 8b110817bc..56cd61c171 100644 --- a/configure.in +++ b/configure.in @@ -1964,6 +1964,24 @@ if test -n "$submachine"; then fi AC_SUBST(libc_cv_cc_submachine) +AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ +__attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl +cat > conftest.c <<EOF +void +__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) +foo (void) {} +EOF +libc_cv_cc_loop_to_function=no +if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) +then + libc_cv_cc_loop_to_function=yes +fi +rm -f conftest*]) +if test $libc_cv_cc_loop_to_function = yes; then + AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) +fi +AC_SUBST(libc_cv_cc_loop_to_function) + dnl Check whether we have the gd library available. AC_MSG_CHECKING(for libgd) if test "$with_gd" != "no"; then |