* config/sparc/sparc-opts.h: New.

[pf3gnuchains/gcc-fork.git] / libgo / configure.ac

diff --git a/libgo/configure.ac b/libgo/configure.ac
index e1c0dd0..2ec9f5c 100644 (file)
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -152,7 +152,7 @@ case ${host} in
 changequote(,)dnl
   i[34567]86-*-* | x86_64-*-*)
 changequote([,])dnl
-    AC_PREPROC_IFELSE([
+    AC_COMPILE_IFELSE([
 #ifdef __x86_64__
 #error 64-bit
 #endif],
@@ -168,7 +168,7 @@ changequote([,])dnl
     GOARCH=m68k
     ;;
   mips*-*-*)
-    AC_PREPROC_IFELSE([
+    AC_COMPILE_IFELSE([
 #ifdef __mips64
 #error 64-bit
 #endif],
@@ -180,7 +180,7 @@ changequote([,])dnl
     fi
     ;;
   rs6000*-*-* | powerpc*-*-*)
-    AC_PREPROC_IFELSE([
+    AC_COMPILE_IFELSE([
 #ifdef _ARCH_PPC64
 #error 64-bit
 #endif],
@@ -192,7 +192,7 @@ changequote([,])dnl
     fi
     ;;
   sparc*-*-*)
-    AC_PREPROC_IFELSE([
+    AC_COMPILE_IFELSE([
 #if defined(__sparcv9) || defined(__arch64__)
 #error 64-bit
 #endif],
@@ -328,10 +328,88 @@ AC_C_BIGENDIAN
 
 GCC_CHECK_UNWIND_GETIPINFO
 
-AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/user.h sys/utsname.h)
+AC_ARG_ENABLE(sjlj-exceptions,
+  AC_HELP_STRING([--enable-sjlj-exceptions],
+                [force use of builtin_setjmp for exceptions]),
+  [case "$enableval" in
+   yes|no|auto) ;;
+   *) AC_MSG_ERROR([unknown argument to --enable-sjlj-exceptions]) ;;
+   esac],
+  [enable_sjlj_exceptions=auto])
+
+AC_CACHE_CHECK([whether to use setjmp/longjmp exceptions],
+[libgo_cv_lib_sjlj_exceptions],
+[AC_LANG_CONFTEST(
+  [AC_LANG_SOURCE([
+void bar ();
+void clean (int *);
+void foo ()
+{
+  int i __attribute__ ((cleanup (clean)));
+  bar();
+}
+])])
+CFLAGS_hold=$CFLAGS
+CFLAGS="--save-temps -fexceptions"
+libgo_cv_lib_sjlj_exceptions=unknown
+AS_IF([ac_fn_c_try_compile],
+  [if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1; then
+    libgo_cv_lib_sjlj_exceptions=yes
+  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1; then
+    libgo_cv_lib_sjlj_exceptions=no
+  fi])
+CFLAGS=$CFLAGS_hold
+rm -f conftest*
+])
+
+if test "$enable_sjlj_exceptions" = "auto"; then
+  enable_sjlj_exceptions=$libgo_cv_lib_sjlj_exceptions
+fi
+
+case $enable_sjlj_exceptions in
+yes)
+  AC_DEFINE(LIBGO_SJLJ_EXCEPTIONS, 1,
+       [Define if the C++ compiler is configured for setjmp/longjmp exceptions.])
+  ;;
+no)
+  ;;
+*)
+  AC_MSG_ERROR([unable to detect exception model])
+  ;;
+esac
+
+AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h)
 AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
 AC_CHECK_FUNCS(srandom random strsignal)
 
+AC_CACHE_CHECK([for __sync_bool_compare_and_swap_4],
+[libgo_cv_func___sync_bool_compare_and_swap_4],
+[AC_LINK_IFELSE([
+typedef unsigned int uint32  __attribute__ ((mode (SI)));
+uint32 i;
+int main() { return __sync_bool_compare_and_swap (&i, 0, 1); }
+],
+[libgo_cv_func___sync_bool_compare_and_swap_4=yes],
+[libgo_cv_func___sync_bool_compare_and_swap_4=no])])
+if test "$libgo_cv_func___sync_bool_compare_and_swap_4" = "yes"; then
+  AC_DEFINE(HAVE_SYNC_BOOL_COMPARE_AND_SWAP_4, 1,
+    [Define to 1 if the compiler provides the __sync_bool_compare_and_swap function for uint32])
+fi
+
+AC_CACHE_CHECK([for __sync_fetch_and_add_4],
+[libgo_cv_func___sync_fetch_and_add_4],
+[AC_LINK_IFELSE([
+typedef unsigned int uint32  __attribute__ ((mode (SI)));
+uint32 i;
+int main() { return __sync_fetch_and_add (&i, 1); }
+],
+[libgo_cv_func___sync_fetch_and_add_4=yes],
+[libgo_cv_func___sync_fetch_and_add_4=no])])
+if test "$libgo_cv_func___sync_fetch_and_add_4" = "yes"; then
+  AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD_4, 1,
+    [Define to 1 if the compiler provides the __sync_fetch_and_add function for uint32])
+fi
+
 dnl For x86 we want to use the -minline-all-stringops option to avoid
 dnl forcing a stack split when calling memcpy and friends.
 AC_CACHE_CHECK([whether compiler supports -minline-all-stringops],