diff options
Diffstat (limited to 'rts/m4/fp_musttail.m4')
| -rw-r--r-- | rts/m4/fp_musttail.m4 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/rts/m4/fp_musttail.m4 b/rts/m4/fp_musttail.m4 new file mode 100644 index 0000000000..0c61c2ad4c --- /dev/null +++ b/rts/m4/fp_musttail.m4 @@ -0,0 +1,16 @@ +# FP_MUSTTAIL +# ---------------------------------- +# Is the musttail attribute supported? +AC_DEFUN([FP_MUSTTAIL], +[ + AC_MSG_CHECKING([whether __attribute__((musttail)) is supported]) + echo 'extern int foo(void); int bar(void) { __attribute__((musttail)) return foo(); }' > conftest.c + if $CC -c conftest.c -o conftest.o > /dev/null 2>&1 + then + AC_MSG_RESULT([yes]) + AC_DEFINE(HAS_MUSTTAIL, 1, [Has musttail]) + else + AC_MSG_RESULT([no]) + fi + rm -f conftest.c conftest.o +]) |