libcpp/

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

diff --git a/gcc/configure.ac b/gcc/configure.ac
index 00a531f..00056cf 100644 (file)
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -330,7 +330,6 @@ if test $ac_cv_prog_cc_w_no_long_long = yes \
    && test $ac_cv_prog_cc_w_no_variadic_macros = yes ; then
   strict1_warn="-pedantic -Wno-long-long -Wno-variadic-macros"
 fi
-AC_SUBST(strict1_warn)
 
 # Add -Wold-style-definition if it's accepted
 AC_CACHE_CHECK(
@@ -347,6 +346,21 @@ if test $ac_cv_prog_cc_w_old_style_definition = yes ; then
   strict1_warn="${strict1_warn} -Wold-style-definition"
 fi
 
+# Add -Wmissing-format-attribute if it's accepted
+AC_CACHE_CHECK(
+  [whether ${CC} accepts -Wmissing-format-attribute],
+  [ac_cv_prog_cc_w_missing_format_attribute],
+  [save_CFLAGS="$CFLAGS"
+  CFLAGS="-Wmissing-format-attribute"
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]])],
+                    [ac_cv_prog_cc_w_missing_format_attribute=yes],
+                    [ac_cv_prog_cc_w_missing_format_attribute=no])
+  CFLAGS="$save_CFLAGS"
+  ])
+if test $ac_cv_prog_cc_w_missing_format_attribute = yes ; then
+  strict1_warn="${strict1_warn} -Wmissing-format-attribute"
+fi
+
 # Enable -Werror, period.
 AC_ARG_ENABLE(werror_always, 
 [  --enable-werror-always         enable -Werror always], [],
@@ -356,6 +370,8 @@ if test x${enable_werror_always} = xyes ; then
   WERROR=-Werror
 fi
 
+AC_SUBST(strict1_warn)
+
 # If the native compiler is GCC, we can enable warnings even in stage1.  
 # That's useful for people building cross-compilers, or just running a
 # quick `make'.
@@ -665,6 +681,10 @@ AC_ARG_ENABLE(shared,
 ], [enable_shared=yes])
 AC_SUBST(enable_shared)
 
+AC_ARG_WITH(build-sysroot, 
+  [  --with-build-sysroot=sysroot
+                          use sysroot as the system root during the build])
+
 AC_ARG_WITH(sysroot,
 [  --with-sysroot[=DIR] Search for usr/lib, usr/include, et al, within DIR.],
 [
@@ -675,7 +695,7 @@ AC_ARG_WITH(sysroot,
    
  TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
  CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR)'
-
+       
  if test "x$exec_prefix" = xNONE; then
   if test "x$prefix" = xNONE; then
    test_prefix=/usr/local
@@ -979,7 +999,7 @@ define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
   fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
   fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
   putchar_unlocked putc_unlocked)
-AC_CHECK_FUNCS(times clock dup2 kill getrlimit setrlimit atoll atoq \
+AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
        sysconf strsignal getrusage nl_langinfo scandir alphasort \
        gettimeofday mbstowcs wcswidth mmap mincore setlocale \
        gcc_UNLOCKED_FUNCS)
@@ -1024,7 +1044,6 @@ else
 fi
 AC_SUBST(TARGET_GETGROUPS_T)
 
-gcc_AC_FUNC_PRINTF_PTR
 gcc_AC_FUNC_MMAP_BLACKLIST
 
 case "${host}" in
@@ -1623,11 +1642,21 @@ done
 CROSS=                                         AC_SUBST(CROSS)
 ALL=all.internal                               AC_SUBST(ALL)
 SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'        AC_SUBST(SYSTEM_HEADER_DIR)
+
+if test "x$with_build_sysroot" != x; then
+  build_system_header_dir=$with_build_sysroot'$(NATIVE_SYSTEM_HEADER_DIR)'
+else
+  # This value is used, even on a native system, because 
+  # CROSS_SYSTEM_HEADER_DIR is just 
+  # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
+  build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
+fi
+
 if test x$host != x$target
 then
        CROSS="-DCROSS_COMPILE"
        ALL=all.cross
-       SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
+       SYSTEM_HEADER_DIR=$build_system_header_dir
        case "$host","$target" in
        # Darwin crosses can use the host system's libraries and headers,
        # because of the fat library support.  Of course, it must be the
@@ -1649,8 +1678,7 @@ then
                CROSS="$CROSS -DNATIVE_CROSS" ;;
        esac
 elif test "x$TARGET_SYSTEM_ROOT" != x; then
-        # This is just $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR)
-        SYSTEM_HEADER_DIR='$(CROSS_SYSTEM_HEADER_DIR)'
+        SYSTEM_HEADER_DIR=$build_system_header_dir 
 fi
 
 # If this is a cross-compiler that does not
@@ -1661,11 +1689,11 @@ fi
 # then define inhibit_libc in LIBGCC2_CFLAGS.
 # This prevents libgcc2 from containing any code which requires libc
 # support.
-inhibit_libc=
+inhibit_libc=false
 if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
        test x$with_newlib = xyes ; } &&
      { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
-       inhibit_libc=-Dinhibit_libc
+       inhibit_libc=true
 fi
 AC_SUBST(inhibit_libc)
 
@@ -2938,8 +2966,8 @@ if test x"$gcc_cv_ld_as_needed" = xyes; then
 [Define if your linker supports --as-needed and --no-as-needed options.])
 fi
 
-case "$target" in
-  powerpc64*-*-linux*)
+case "$target:$tm_file" in
+  powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
     AC_CACHE_CHECK(linker support for omitting dot symbols,
     gcc_cv_ld_no_dot_syms,
     [gcc_cv_ld_no_dot_syms=no