2009-05-29 David Billinghurst <billingd@gcc.gnu.org>

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

diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index 1187d74..d48bccc 100644 (file)
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -1,7 +1,10 @@
 dnl Process this file with autoconf to produce a configure script.
 
+sinclude(../config/enable.m4)
+sinclude(../config/tls.m4)
 sinclude(../config/acx.m4)
 sinclude(../config/no-executables.m4)
+sinclude(../config/override.m4)
 
 AC_PREREQ(2.59)
 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
@@ -143,9 +146,51 @@ if test x$enable_decimal_float = xyes; then
 fi
 AC_SUBST(enable_decimal_float)
 
+# Check for fixed-point support.
+AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
+              [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
+                                 [libgcc_cv_fixed_point=no])])
+fixed_point=$libgcc_cv_fixed_point
+AC_SUBST(fixed_point)
+
+# Check 32bit or 64bit for x86.
+case ${host} in
+i?86*-*-* | x86_64*-*-*)
+  cat > conftest.c <<EOF
+#ifdef __x86_64__
+host_address=64
+#else
+host_address=32
+#endif
+EOF
+    eval `${CC-cc} -E conftest.c | grep host_address=`
+    rm -f conftest.c
+    ;;
+esac
+
 # Collect host-machine-specific information.
 . ${srcdir}/config.host
 
+# Check if Solaris/x86 linker supports ZERO terminator unwind entries.
+# This is after config.host so we can augment tmake_file.
+# Link with -nostartfiles -nodefaultlibs since neither are present while
+# building libgcc.
+case ${host} in
+i?86-*-solaris2.1[[0-9]]*)
+  cat > conftest.s <<EOF
+       .section        .eh_frame,"a",@unwind
+       .zero   4
+       .section        .jcr,"aw",@progbits
+       .zero   8
+EOF
+  if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
+      # configure expects config files in libgcc/config, so need a relative
+      # path here.
+      tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
+  fi
+  ;;
+esac
+
 # Check for visibility support.  This is after config.host so that
 # we can check for asm_hidden_op.
 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
@@ -167,6 +212,17 @@ else
 fi
 AC_SUBST(vis_hide)
 
+# See if we have thread-local storage.  We can only test assembler
+# sicne link-time and run-time tests require the newly built
+# gcc, which can't be used to build executable due to that libgcc
+# is yet to be built here.
+GCC_CHECK_CC_TLS
+set_have_cc_tls=
+if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
+  set_have_cc_tls="-DHAVE_CC_TLS"
+fi
+AC_SUBST(set_have_cc_tls)
+
 # Conditionalize the makefile for this target machine.
 tmake_file_=
 for f in ${tmake_file}